Hey there!
You cannot cut through steel with a plastic knife. As fun as it sounds, it is not a good idea to try, and 99.9% of the time it would not work.
Hope this helps!
It is impossible to cut through steel with a plastic knife because steel is much harder than plastic, and trying to do so could lead to injury.
Steel is a very hard material that requires special tools to cut through effectively due to its high hardness level. Plastic knives are not capable of cutting through steel because they are not hard or sharp enough to overcome the material's resistance. Therefore, It is virtually impossible to cut through steel with a plastic knife due to the significant difference in hardness between the two materials. The hardness of a material dictates how resistant it is to being scratched or cut. For example, steel used in a pocketknife blade has a hardness value of around 5.5, which is considered sufficient to separate between hard and soft minerals. On the other hand, plastics used for items such as plastic cutting boards or plastic knives are much softer.
Which system sends nutrients to all the body's cells? excretory system nervous system circulatory system endocrine system
The circulatory system sends nutrients to the body's cells.
Answer: Circulatory system
Explanation:
The circulatory system moves nutrients from the source to various parts of the body.
The nutrients is supplied to each and every cell of the body because each cell of the body needs energy to work efficiently.
The nutrients and the waste materials are also carried from the various cells to the kidney and liver for filtration.
Hence, the circulatory system is responsible for the transport of nutrients from the source to various parts of the body.
A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of -0.418m/s. How much time did it take? (unit=s)
Given
initial position = Xi= 19.9m
Final position Xf = 5.4m
Average velocity= Va = -0.418m/s
it shows displacement is reverse.
To find t=?
As Va = (Xf- Xi) / t
t = (Xf-Xi) / ( Va)
t = ( 5.4-19.9) / (-0.418)
t = (-14.5 ) / (-0.418) (-ve sign cancel out at numerator and denominator)
t =34.69 s
A space-walking astronaut has become detached from her spaceship. she's floating in space while holding nothing nothing but a wrench. She is thinking how to get back to the spaceship which she can see 50 meters from her current location. what can she do to get back to the spaceship? Use language from Newton's laws of motion in your answer
she could throw her tool belt in the opposite direction, sending her floating towards her ship. That would apply to Newton's Law ofwhat is in motion stays in motion unless interrupted. Therefore if you threw it one way you would keep going the other way because there are no molecules to interrupt your path.
To return to her spaceship, the astronaut should apply Newton's third law of motion by throwing the wrench away from the ship, which will propel her towards it via an equal and opposite reaction.
Explanation:The astronaut floating in space can return to her spaceship by utilizing Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. By throwing the wrench away from the spaceship, there will be a reactive force that pushes the astronaut towards the spaceship. The mass of the wrench and the force with which the astronaut throws it will determine the velocity at which she moves towards the spaceship, according to the conservation of momentum. Newton's laws of motion and the conservation of momentum are key principles that will help her navigate back to safety.
Salmon often jump waterfalls to reach their
breeding grounds.
Starting 3.16 m from a waterfall 0.379 m
in height, at what minimum speed must a
salmon jumping at an angle of 37.6
◦
leave the
water to continue upstream? The acceleration
due to gravity is 9.81 m/s
2
.
Answer in units of m/s.
The problem corresponds to the motion of a projectile (the salmon), with initial speed [tex]v_0[/tex], initial direction [tex]\theta=37.6^{\circ}[/tex] and vertical acceleration [tex]g=9.81 m/s^2[/tex] downward. The two equations which gives the horizontal and vertical position of the salmon at time t are
[tex]S_x (t) = v_0 cos \theta t[/tex] (1)
[tex]S_y (t) = v_0 sin \theta t - \frac{1}{2}gt^2[/tex] (2)
We can solve the problem by requiring Sx=3.16 m and Sy=0.379 m, the data of the problem.
Solving eq.(1) for t:
[tex]t=\frac{S_x}{v_0 cos \theta}[/tex]
And substituting this expression of t into eq.(2), we get the following expression for [tex]v_0[/tex]:
[tex]v_0 =\sqrt{\frac{g S_x^2}{2(tan \theta S_x -S_y)cos^2 \alpha}}[/tex]
And substituting the numbers into the equation, we find
[tex]v_0 = 6.16 m/s[/tex]
The minimum speed Salmon must jump is [tex]\boxed{6.16{\text{ }}{{\text{m}} \mathord{\left/ {\vphantom {{\text{m}} {\text{s}}}} \right. \kern-\nulldelimiterspace} {\text{s}}}}[/tex].
Further explain:
Here, the given problem is on the basis of the projectile motion.
Given:
Initial direction [tex]\left( \theta\right)[/tex] with horizontal is [tex]37.6^\circ[/tex].
The distance travel by Salmon in x-direction at time [tex]t[/tex] is [tex]3.16{\text{ m}}[/tex].
The distance travel by Salmon in y-direction at time [tex]t[/tex] is [tex]0.379{\text{ m}}[/tex].
Acceleration due to gravity is [tex]9.8{{\text{m}} \mathord{\left/ {\vphantom {{\text{m}} {{{\text{s}}^2}}}} \right. \kern-\nulldelimiterspace} {{{\text{s}}^2}}}[/tex].
Formula and concept used:
The velocity component in x-direction [tex]\left( {{v_x}} \right)[/tex] is[tex]v\cos \theta[/tex].
Distance travel by Salmon in x-direction at time [tex]t[/tex] is,
[tex]\begin{gathered}{s_x} = {v_x}t \hfill \\{s_x} = v\cos \theta\cdot t \hfill \\ \end{gathered}[/tex]
Simplify above equation,
[tex]\boxed{t=\dfrac{{{s_x}}}{{v\cos \theta }}}[/tex] …… (1)
The velocity component in y-direction[tex]\left( {{v_y}} \right)[/tex] is [tex]v\sin \theta[/tex].
Distance travel by Salmon in y-direction at time [tex]t[/tex] is,
[tex]{s_y} = {v_y}t - \frac{1}{2}g{t^2}[/tex]
Substitute the value of [tex]{v_y}[/tex] in above equation,
[tex]\boxed{{s_y} = v\sin \theta\cdot t - \frac{1}{2}g{t^2}}[/tex] …… (2)
Substitute the value of [tex]t[/tex] from equation (1) in to the equation (2).
[tex]\begin{aligned}{s_y}&=v\sin \theta\cdot \left( {\frac{{{s_x}}}{{v\cos \theta }}} \right) - \frac{1}{2}g{\left( {\frac{{{s_x}}}{{v\cos \theta }}} \right)^2} \hfill \\&={s_x}\tan\theta- \frac{{g{{\left( {{s_x}} \right)}^2}}}{{2{v^2}{{\cos }^2}\theta}}\hfill\\\end{aligned}[/tex]
Simplify the above equation to obtain the value of [tex]v[/tex] ,
[tex]\dfrac{{g{{\left( {{s_x}} \right)}^2}}}{{2{v^2}{{\cos }^2}\theta }}={s_x}\tan \theta-{s_y}[/tex]
Rearrange the above expression.
[tex]\dfrac{1}{{{v^2}}}=\dfrac{{2{{\cos }^2}\theta\cdot \left( {{s_x}\tan\theta- {s_y}} \right)}}{{g{{\left( {{s_x}} \right)}^2}}}[/tex]
Simplify the above equation,
[tex]{v^2} = \dfrac{{g{{\left( {{s_x}} \right)}^2}}}{{2{{\cos }^2}\theta\cdot \left( {{s_x}\tan \theta- {s_y}} \right)}}[/tex]
Taking the square root both the sides in above equation,
[tex]\boxed{v=\sqrt {\frac{{g{{\left( {{s_x}} \right)}^2}}}{{2{{\cos }^2}\theta\cdot \left( {{s_x}\tan \theta- {s_y}} \right)}}} }[/tex] …… (3)
Calculation:
Substitute the value of [tex]{s_x}[/tex] as [tex]3.16{\text{ m}}[/tex] , the value of [tex]{s_y}[/tex] as [tex]0.379{\text{ m}}[/tex] , the value of [tex]\theta[/tex] as [tex]37.6^\circ[/tex] in equation (3).
[tex]\begin{aligned}v&=\sqrt {\frac{{9.8{{\left( {3.16} \right)}^2}}}{{2{{\cos }^2}37.6^\circ\cdot\left( {3.16\tan 37.6^\circ- 0.379} \right)}}}\\&=\sqrt {\frac{{97.86}}{{2.579}}}\\&=\sqrt {37.945}\\&=6.16{\text{ }}{{\text{m}} \mathord{\left/{\vphantom {{\text{m}} {\text{s}}}} \right.\kern-\nulldelimiterspace}{\text{s}}}\\\end{aligned}[/tex]
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Answer detail:
Grade: Senior School
Subject: Physics
Chapter: Projectile motion
Keywords:
Salmon, jump, waterfall, angle of inclination, continue upstream, projectile, acceleration, velocity, acceleration due to gravity, Newton’s laws, equation of motion, velocity, component of acceleration.
A weight lifter lifts a set of weights a vertical distance of 3.85 m. If a constant net force of 350 N is exerted on the weights, what is the net work done on the weights? (Show all work and include units of measure)
work done is defined as product of force and displacement in the direction of force.
So we can say formula of work done is
[tex]W = F.d[/tex]
so here it is given that
F = 350 N
d = 3.85 m
from above equation we have
[tex]W = 350 * 3.85[/tex]
[tex]W = 1347.5 J[/tex]
So net work done is 1347.5 J
Here this is net work done which includes Work done by applied force and also the work done by gravitational force of earth
Cars A, B, C, D, and E are moving on tracks from left to right. The lengths of the tracks are the same. Assuming each car started at the beginning of its track, which cars are moving at a constant velocity?
A) A and C
B) B and D
C) C and E
D) D and A
Answer A
Cars A, B, C, D, and E are moving on tracks from left to right. The lengths of the tracks are the same. Assuming each car started at the beginning of its track, which cars are moving at a constant velocity?
A) A and C
B) B and D
C) C and E
D) D and A
The cars A and C are moving with a constant velocity. The correct option is A.
The diagram attached, is a motion diagram, which marks the positions of an object measured at equal time intervals by means of dots.
If the dots are evenly spaced, it shows that the object is making equal displacements in equal intervals of time, which means that the object has a constant velocity.
In the attached diagram, it can be seen that the dots for the cars A and C are equally spaced, showing that these cars are moving with a constant velocity.
The cars B and D are accelerating, since the space between the dots appears to increase.
The car E is decelerating, as the distance between the dots progressively decreases.
Hence only the cars A and C are moving with constant velocities, with A having a greater velocity than C.
Which of these would have particles with the highest kinetic energy? Ice Water Water Vapor
The correct answer is water vapor.
Explanation:In evaporation of water, particles with high kinetic energy tend to leave the water surface. Because high kinetic energy molecules move faster than others breaking bonds with other molecules. And escape the water to air in form of vapors.While the ice water contain molecules with low kinetic energy.Answer: Water Vapor
Explanation:
Kinetic energy is the energy possessed by an object by virtue of its motion.
Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means they are fixed and have low kinetic energy.
For example : Ice
Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another and hence have low kinetic energy.
For example : water
Gaseous state : In this state, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and spread out and thus have high kinetic energy.
For example : water vapor
A free falling object has the velocity time graph shown. What is the objects displacement between 0.0 and 6.0s
For free fall motion the displacement can be found by graphically as well as by kinematics equation
Here acceleration of object is constant as it fall due to gravity so we can use
[tex]d = v_i * t + \frac{1}{2}at^2[/tex]
here if body starts with zero initial speed then we can say
[tex]d = 0 + \frac{1}{2}*9.8*t^2[/tex]
here we need to find the displacement from t = 0 to t = 6s
so we can say
[tex]d = \frac{1}{2}*9.8*6^2[/tex]
[tex]d = 176.4 m[/tex]
so the displacement will be 176.4 m
in order to find the displacement from the graph of velocity and time we need to find the area under the graph for given time interval that will also give us same displacement for given period of time.
Answer:
+360m
Explanation:
You are missing some parts of the question but I have found them else where. The graph will be shown below.
The formula for this is [ d = vt ] where v = velocity and t = time.
On the graph, we can see that the acceleration is constant. The line goes to a maximum velocity of 60m/s and a maximum time of 6 seconds.
Find the displacement with what we are given.
d = 60 * 6
d = 360m
Since we are going forward, we are going to add a "+" sign in front.
Best of Luck!
An indicator of average kinetic energy is _____. pressure volume diffusion temperature
An indicator of average kinetic energy is temperature. Temperature is directly proportional to Kinetic energy of the molecules of an element.
Answer:
Temperature
Explanation:
The energy contained by a body due its motion is known as kinetic energy.From kinetic theory of gases, the average kinetic energy is proportional to temperature. More the temperature, more would be the speed of the particles. Gases having same temperature would have same average kinetic energy.
Thus, an indicator of average kinetic energy is temperature.
Which vector should be negative?
a displacement in the direction North
any vector whose magnitude is greater than 1
the velocity of a falling object
How far will a brick starting from rest fall freely in 3 seconds
When object falls freely we can say
its initial speed will be ZERO
and its acceleration due to gravity must be
[tex]a = g = 9.8 m/s^2[/tex]
Now we need to find the distance of free fall in 3 s of time
So here we will use kinematics
[tex]y = v* t + \frac{1}{2} at^2[/tex]
now we will plug in all values in it
[tex]y = 0 + \frac{1}{2}* 9.8 * 3^2[/tex]
[tex]y = 44.1 m[/tex]
So it will fall by total distance of 44.1 m
Answer:
The brick will cover a distance of [tex]44.1\;\rm{m[/tex].
Explanation:
Given: A brick starting from rest fall freely in 3 seconds.
As mentioned in question,
When an object falls freely then its initial speed will be [tex](u)=0\; \rm{m/s[/tex].
Acceleration due to gravity is [tex]a=g=9.8\;\rm{m/s^{-2[/tex].
Time [tex](t)=3\; \rm{seconds[/tex]
Using the laws of motion: [tex]s=ut+\frac{1}{2}at^2[/tex]
Substiuting all the values we get:
[tex]s=0\times3+\frac{1}{2}\times9.8\times3^2\\s=0.5\times9.8\times 9\\s=44.1\;\rm{m[/tex]
Therefore, the brick will cover a distance of [tex]44.1\;\rm{m[/tex].
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A runner traveled 15 kilometers north then backtracked 11 kilometers south before stopping. His resultant displacement was
Question 4 options:
26 km north
26 km south
4 kilometers north
4 kilometers south
c is the correct answer
it would be 4 kilomotors
A node is a point on a standing wave that has no displacement from the rest position. At the nodes, _____.
a) the wave is refracted
b) there is complete destructive interference between the incoming and reflected waves
c) the wave is diffracted
d) there is complete constructive interference between the incoming and reflected waves
Answer: (B) There is complete destructive interference between the incoming and reflected waves
Explanation:
For example, if you pluck a guitar the waves will travel back and forth. They consist of nodes and anti-nodes. It is created, when the wave traveling to one side and bounces of the other end and comes back. As it travels to the other side, it is reflected thus, comes back. So standing waves occurs when there is interference.
When the wave is produced, the points where the string is not moving are called nodes and where they are moving are called anti-nodes. The positions where nodes are produced, destructive interference occurs and where anti-nodes are produced, constructive interference occurs
Answer:
There is complete destructive interference between the incoming and reflected waves
Explanation:
I did gradpoint
Why do all objects hit with the same velocity (ignoring air resistance) if dropped from the same height?
A) Acceleration due to gravity affects heavier objects less, and lighter objects more, therefore it balances out the effect of weight.
B) The mass of an object is in a state of change as it falls since it becomes closer to the center of the earth and therefore is affected by the acceleration due to gravity the same.
C) Acceleration due to gravity affects all bodies the same since it depends primarily on the gravity of the planet, not on the object being dropped.
D) None of the above
Answer: C)Acceleration due to gravity affects all bodies the same since it depends primarily on the gravity of the planet, not on the object being dropped.
Explanation:
Using equation of motion,
[tex]v^{2}=u^{2}+2gh[/tex]
where v= final velocity , u= initial velocity , h= height from where object is dropped ,acceleration due to gravity , [tex]g=\frac{GM}{R^{2}}[/tex]
G= universal gravitational constant, M=mass of planet , R= radius of planet
Therefore g depends on mass and radius of planet .
=>If all objects are dropped from same height with zero initial speed the final speed depends only on acceleration due to gravity which is a property of planet taken into consideration and does not depend on the object.
For example if a piece of paper and a heavy stone are dropped from the same height with zero initial speed then both objects will have same final speed .
Acceleration due to gravity affects all bodies the same since it depends primarily on the gravity of the planet, not on the object being dropped.
Explanation:The correct answer is C) Acceleration due to gravity affects all bodies the same since it depends primarily on the gravity of the planet, not on the object being dropped.
Acceleration due to gravity is constant for all objects near the surface of the Earth, regardless of their mass. This means that when objects are dropped from the same height, they will all experience the same acceleration. As a result, they will all hit the ground with the same velocity, disregarding air resistance.
For example, if you drop a feather and a rock from the same height, both will fall at the same rate due to gravity. However, the feather will experience more air resistance and take longer to reach the ground.
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a pool ball leaves a 0.60 meter high table with an initial high table with an initial horizontal velocity of 2.4m/s. predict the time required for the pool ball to fall to the ground and the horizontal distance between the tables edge and the balls landing location
Ball leaves the table of height 0.60 m
Initial speed of the ball is in horizontal direction which is 2.4 m/s
Now here we can say that time taken by the ball to hit the ground will be given by kinematics equation in vertical direction
[tex]\Delta y = v_y*t + \frac{1}{2}at^2[/tex]
here in y direction we can say
[tex]\Delta y = 0.60 m[/tex]
[tex]v_y = 0[/tex]
[tex]a = 9.8 m/s^2[/tex] due to gravity
now from above equation we have
[tex]0.60 = 0 + \frac{1}{2}*9.8*t^2[/tex]
[tex]t = 0.35 s[/tex]
Now in the same time the distance that ball move in horizontal direction is given as
[tex]d = v_x* t[/tex]
given that
[tex]v_x = 2.4 m/s[/tex]
[tex]d = 2.4 * 0.35[/tex]
[tex]d = 0.84 m[/tex]
So it will move a total distance of 0.84 m where it will land
The time required for the pool ball to hit the ground is approximately 0.35 seconds and it would cover a horizontal distance of about 0.84 meters from the edge of the table to the landing location.
Explanation:Your question involves the physics concept of projectile motion. Here, we can use the concepts of horizontal velocity and vertical displacement to calculate the time it would take the pool ball to hit the ground and the horizontal distance it would cover.
Firstly, solving for the fall time, we use the equation of motion: h = 0.5gt², where h is the height, g is the gravity constant (9.8 m/s²), and t is the time. Given the height h = 0.60m, we find t≈0.35s.
Secondly, to find the horizontal distance (the distance between the table's edge and the ball's landing location), we use the formula d = vt, where d is distance, v is horizontal velocity, and t is time. So, d ≈ 2.4m/s * 0.35s = 0.84m.
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Karen drops a 2.0 kg rock from the top of a mountain. Determine the distance the rock travels after falling for 3 seconds assuming it has reached free fall and given the gravitational acceleration of 9.8 m/sec2 downward. [HINT: Distance=(0.5)*(acceleration)*(time2)]
Explanation:
The data given is as follows.
mass = 2.0 kg
time = 3 seconds
gravitational acceleration = [tex]9.8 m/s^{2}[/tex]
Calculate the distance traveled by the rock when it falls is as follows.
[tex]Distance = \frac{1}{2} \times acceleration \times time^{2}[/tex]
= [tex]\frac{1}{2} \times 9.8 m/s^{2} \times (3 second)^{2}[/tex]
= [tex]\frac{1}{2} \times 9.8 m/s^{2} \times 9 second^{2}[/tex]
= 44.1 m
Therefore, the distance traveled by rock is 44.1 meter.
Julia can swim at 3.5 km/h in still water. She attempts to head straight north
across a river with a current flowing at 1.2 km/h West. What is her resultant
velocity?
In this problem , at what angle should Julia aim in order to land directly across the
river from her start point?
1) 3.7 km/hr N19°W
2) she must aim at N20°E
work sheet #6
relative velocity
A sprinter springs out of the starting blocks with an acceleration of 11 m/s2 that is essentially horizontal to the right. How much horizontal force did the 51-kg sprinter exert on the starting blocks during a start to produce this acceleration? Assume the sprinter is running in the positive direction.
Remark
It's not the number that's the problem. It's the minus sign.
Just use F = m*a to get the numerical answer. F = 51 * 11 = 561 N
Now we come to the hard part. If you learn nothing else in physics, you learn that minus signs are either your best buddy or your worst enemy -- one that you pay a mafia hit man a lot of money to get rid of.
In this case, you better start looking for a guy wearing a white tie.
What you are finding is a force that is acting against the starting block. In order to move forward, you have to push against something to accomplish going forward. That's why the block is there: it absorbs the push and you pop forward. You should draw a diagram of the block so you see how many forces act on it.
Answer: - 561
A balloon is floating freely at a rate of 0.87 m/s due south. A southerly breeze (coming from the south) blows against the balloon with a velocity of 0.32 m/s. What is the velocity of the balloon and the direction it is traveling? Ans- Velocity=
Direction =
Velocity = 1.32
Direction = South
Answer:
Velocity = 0.55 m/s
Direction = South
Explanation:
Given
let us take the south as positive direction
Velocity of the balloon [tex]v_{b}[/tex] = + 0.87 m/s
Velocity of wind [tex]v_{w}[/tex] = - 0.32 m/s
Solution
Resultant velocity
[tex]v = v_{b} + v_{w} \\\\v = 0.87+(-0.32)\\\\v = 0.55 m/s[/tex]
since the resultant velocity is positive, balloon is directed southward
Larry and Balky set up an experiment to analyze the motion of a marble as it rolled down an incline. They started the marble at the top of the ramp and set up photogates to collect data as the marble rolled down the ramp. Which graph format would allow Larry and Balky to calculate instantaneous velocity using slope? A) Velocity on the y-axis, time on the x-axis B) Distance on the y-axis, time on the x-axis C) Time on the y-axis, distance on the x-axis D) Velocity on the y-axis, distance on the x-axis
Final answer:
To calculate instantaneous velocity using the slope of a graph, Larry and Balky should use a graph with velocity on the y-axis and time on the x-axis.
Explanation:
Larry and Balky want to calculate instantaneous velocity using slope in their experiment with a marble rolling down an incline. To accomplish this, they should plot velocity on the y-axis and time on the x-axis. The reason for this is because time is generally considered the independent variable, and velocity, which depends on the time passed, is the dependent variable. In a graph formatted this way, the slope at any given point will represent the instantaneous velocity of the marble at that point in time. As velocity (v) is equal to the displacement (d) divided by time (t), a straight graph of velocity versus time would show velocity as the slope of that line, thus proving option A to be the correct choice for their graph format.
Match the equivalent temperatures.
1. 60.°C 473 degrees K
2. 300.K 333 degrees K
3. 373K 27 degrees C
4. 200.°C 212 degrees F
The conversions are as follows
60.°C = 333 Kelvin
212 F = 373 K
200 C = 273 K
27 C = 300 K
This question involves matching temperatures in differing scales: degrees Celsius, Kelvin, and Fahrenheit. However, only the first match (60°C to 333K) can be made with the given options. The remaining options don't correspond correctly.
Explanation:The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:
The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:
60°C is equivalent to 333K.300K does not have a match in the given options.373K is equivalent to 100°C (but there is no 100 degrees Celsius in the options).200°C is equivalent to 392°F (but there is no 392 degrees Fahrenheit in the options).Please note, the conversions work as follows:From Celsius to Kelvin, you add 273.15.From Kelvin to Celsius, you subtract 273.15.To convert Celsius to Fahrenheit, use the formula (°C * 9/5) + 32.To convert Fahrenheit to Celsius, use the formula (°F - 32) * 5/9.To learn more about Temperature Conversion:
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What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1280 kilohertz and energy
Answer:
The wavelength, frequency and speed of a photon are related as:
[tex]\lambda=\frac{c}{f}[/tex]
where, [tex]\lambda[/tex] is the wavelength, c is the speed of light because all photons travels with speed of light, c in space, and f is the frequency.
[tex]\Rightarrow\lambda=\frac{3\times10^8m/s}{1280\times 10^3s^{-1}}=234 m[/tex]
Hence, the wavelength of the radio photon is 234 m
Energy of this photon:
[tex]E=hf[/tex]
where, h is the Planck's constant.
[tex]E=6.6\times 10^{-34} Js\times 1280\times 10^3s^{-1}=8448 \times 10^{-31} J[/tex]
Hence, the energy of the radio photon is [tex]8448 \times 10^{-31} J[/tex]
Final answer:
To calculate the wavelength of a radio photon from an AM radio station broadcasting at 1280 kilohertz, use the formula λ = c / f. With the speed of light (c) at 3.00 × 10⁸ m/s, the wavelength comes out to 234.375 meters.
Explanation:
The question asks for the wavelength of a radio photon from an 'am' radio station that broadcasts at 1280 kilohertz. The wavelength (λ) can be found using the equation λ = c / f, where 'c' is the speed of light (approximately 3.00 × 10⁸m/s) and 'f' is the frequency. Plugging in the frequency of 1280 kHz (which is 1.28 × 10⁶ Hz), we get:
λ = c / f = (3.00 × 10⁸m/s) / (1.28 × 10⁶ Hz) = 234.375 meters.
The wavelength of the radio photon is therefore 234.375 meters.
How is the United Kingdom planning to use driverless cars beginning in 2015?
Driverless cars will replace limousines for private transport.
Driverless cars will be used by drivers who travel on the freeway.
Driverless cars will transport people to and from the train station.
Driverless cars will be used by police to patrol the town at night
Answer:
Driverless cars will transport people to and from the train station.
Explanation:
the person above is correct
The United Kingdom planning to use driverless cars beginning in 2015 in a way such that Driverless cars will transport people to and from the train station, therefore the correct answer is option C.
What is an electric vehicle (EV)?An EV stands for an electric vehicle. Electric vehicles (EVs) are autos that are powered totally or partially by electricity.
According to a lot of experts, self-driving cars can be programmed to be safer than human drivers.
These automobiles are able to perceive their surroundings and predict what lies ahead, something that humans are not capable of doing thanks to the sensors and cameras that are directing and monitoring them.
The right response is option C since the United Kingdom plans to employ autonomous automobiles starting in 2015 in a mode that will allow them to carry people to and from the railway station.
To learn more about electric vehicles here, refer to the link;
https://brainly.com/question/28174365
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Visible electrical discharge from a storm cloud is called?
id have to say its thunder
A timeline is necessary a. For every goal c. For every life goal b. For every academic goal d. For every high school goal please select the best answer from the choices provided a b c d
A timeline is necessary a. For every goal.
Here are a few reasons why it is so:
Provides Structure: A timeline gives structure to your plan by breaking it down into manageable steps and defining the sequence in which tasks need to be accomplished.Prioritizes Tasks: With a timeline, you can prioritize different tasks and activities to focus on what is most important at a given time.Tracks Progress: It allows you to monitor your progress towards your goal, so you know whether you are on track or need to make adjustments.Enhances Motivation: Knowing the deadlines can boost your motivation to achieve the goal within the set timeframe.Avoids Procrastination: Timelines help reduce procrastination by setting clear deadlines and creating a sense of urgency to complete tasks.In summary, a timeline is beneficial for every goal as it provides a clear path, helps track progress, and keeps you motivated to achieve your objectives.Wildlife biologists are attempting to monitor the population size of the insect pest known as the gypsy moth (Lymantria dispar) during the summer months. To estimate the total population size of these insects living in a 50 square kilometer forest, biologists have sampled random trees, counting the number of eggs and larvae on each randomly selected tree. Which of these factors MOST directly impacts the accuracy of this estimate?
A)
the number of trees sampled
B)
the presence of gypsy moth predators
C)
the overall health of the gypsy moth population
D)
the weather conditions at the time of the sampling
Answer: Option A: The number of trees sampled.
The accuracy can be understood as how close is the measured value to the true value. The aim is to monitor the population size of the insect pest in a 50 square kilometer. Random trees are selected, and number of eggs and larvae are counted. So, the measured value would be closer to actual value when the number of trees sampled are increased. More the number of trees sampled, less would be the chances of error and the accuracy of the estimate would increase.
Answer:
a.) the number of tress sampled
Van finds a metamorphic rock as he is exploring a small ravine near his house. Metamorphic rock is a type of rock that has gone through a change that has turned it into a different type of rock. Which processes can cause rocks to change to metamorphic rock?
breaking
crushing
deposition
heat and pressure
heat and pressure would be your answer hope it helps
Answer:
heat and pressure
Explanation:
The ___________ and __________ systems communicate to regulate body functioning.
A.
nervous . . . endocrine
B.
endocrine . . . hormone
C.
neuron . . . nervous
D.
neuron . . . hormone
A.
neural receptor
B.
mylar sheath
C.
synapse
D.
hormones
Answer:
Nervous and endocrine
Explanation:
The nervous and endocrine system work together to control and regulate the functioning of the body and thus maintain homeostasis. These two systems work together in cooperation to maintain normal functions such as metabolism, maturation, reproduction, etc.These two cooperate mainly via the chemical signals sent by the hypothalamus to the pituitary gland which in response to these chemical signals releases hormones that stimulate the other endocrine glands to secrete their respective hormones and bring appropriate changes in the body.A diverging lens only produces a ___________ image because the light rays never intersect.
Answer: Virtual image
Explanation:
- The light rays never converges, because the light rays crosses the point where all the rays accumulate, taking it away from the lens
- The virtual image that is produced, is positioned in front of the lens
- Light when passes through a concave lens, it is refracted away from the focal point making an image look smaller
- When light passes through a convex lens, it is refracted towards the focal point making the image look bigger
Answer:
Virtual image
Explanation:
a p e x verified
help please .. what the answer?
As it is given here that two blocks are pulled towards right side with constant horizontal velocity.
Both blocks are given that moving with speed 2 m/s
Now we can say that by Newton's II law
F = ma
i.e. Net force on a system is product of its mass and acceleration
but as we can see that here two blocks are moving with constant speed so here as per definition of acceleration we will say
[tex]a = \frac{dv}{dt}[/tex]
As we know that v = constant
[tex]a = 0[/tex]
so here from 2nd law
[tex]F = 0[/tex]
so net force must be zero block A
So correct FBD must be "option A"
we should not represent any force on it