similar: they are both made of elements
diff: an element is just one of itself whereas a compound is 2 or more element chemically combined
The military uses a special instrument to detect this type of wave to help improve night vision.
A. infrared waves
B. gamma rays
C. radio waves
D. ultraviolet rays
Night vision equipment detects infrared radiation. Where it detects some, it paints the corresponding place on a screen with visible rays.
Which is the correct interpretation of the formula mgf2? the lattice contains 1 magnesium atom for every 2 fluorine atoms. the lattice contains 1 magnesium ion for every 2 fluoride ions. the lattice contains 2 magnesium atoms for every fluorine atom. the lattice contains 2 magnesium ions for every fluoride ion.
Answer: the lattice contains 1 magnesium ion for every 2 fluoride ions.
[tex]MgF_2[/tex] is an ionic compound. It contains positive ions of Magnesium and and negative ions of Fluorine. To balance the +2 positive charge of one magnesium ion, two (-1) negatively charged Fluorine ions are present. Hence, The correct interpretation of [tex]MgF_2[/tex] is that the lattice contains 1 Magnesium ion for every 2 Fluoride ions.
The angle between magnetic north and the north to which a compass needle points is known as magnetic declination.
Please select the best answer from the choices provided
T
F
From among the choices provided, the better choice is the upper-case letter 'T '. That symbol can conveniently be used to represent the words "true" or "truth", which is exactly the reason that it is the better choice for a response, since the complicated statement at the beginning of the question is completely true in its every detail, nuance, jot and tittle.
Answer:
it is true my child
Explanation:
How is the energy of an electromagnetic wave carried from one place to another
changing electric field gives a changing magnetc field ... can calculate energy using Poynting vector
In electric dryer consumes 6.0×10 6 jewel of energy when operating at 220 V for 30 minutes. During operation the dryer draws a current of approximately?
Final answer:
The electric dryer, which consumes 6.0×10⁶joules of energy at 220 V for 30 minutes, draws an approximate current of 15.15 amperes during operation.
Explanation:
To determine the current drawn by an electric dryer that consumes 6.0×10⁶ joules of energy while operating at a voltage of 220 V for 30 minutes, we use the relationship between power, voltage, and current given by the equation P = IV, where P is power in watts, I is current in amperes, and V is voltage in volts. First, we need to calculate the power used by the dryer. Power is the rate of energy consumption over time, so:
Power (P) = Energy (E) / Time (t)P = 6.0×10⁶ J / (30 * 60 s) = 6.0×10⁶ J / 1800 s = 3333.33 WNext, we can calculate the current using the power:
Current (I) = Power (P) / Voltage (V)I = 3333.33 W / 220 V ≈ 15.15 ATherefore, the electric dryer draws an approximate current of 15.15 amperes during operation.
The current drawn by the electric dryer is approximately [tex]\( {0.00421 \text{ A}} \)[/tex] (or 4.21 mA).
Given:
- Energy consumed [tex]\( E = 6.0 \times 10^6 \)[/tex] joules
- Operating voltage ( V = 220 ) V
- Operating time t = 30 minutes
First, convert the operating time from minutes to seconds:
[tex]\[ t = 30 \text{ minutes} = 30 \times 60 \text{ seconds} = 1800 \text{ seconds} \][/tex]
Next, convert the energy consumed from joules to kilowatt-hours (kWh):
[tex]\[ E_{\text{in kWh}} = \frac{6.0 \times 10^6 \text{ J}}{3600 \text{ s}} \times \frac{1 \text{ kWh}}{3.6 \times 10^6 \text{ J}} \]\[ E_{\text{in kWh}} = \frac{6.0 \times 10^6}{3600 \times 3.6 \times 10^6} \text{ kWh} \]\[ E_{\text{in kWh}} = \frac{6.0}{12960} \text{ kWh} \]\[ E_{\text{in kWh}} \approx 0.000463 \text{ kWh} \][/tex]
Now, calculate the power P in kilowatts (kW):
[tex]\[ P = \frac{E_{\text{in kWh}}}{t_{\text{in hours}}} = \frac{0.000463 \text{ kWh}}{0.5 \text{ hours}} = 0.000926 \text{ kW} \][/tex]
Convert the power from kilowatts to watts (W):
[tex]\[ P = 0.000926 \text{ kW} \times 1000 = 0.926 \text{ W} \][/tex]
Now, use the formula ( P = VI ) to find the current ( I ):
[tex]\[ I = \frac{P}{V} \][/tex]
Substitute [tex]\( P = 0.926 \text{ W} \)[/tex][tex]\( P = 0.926 \text{ W} \)[/tex] P = 0.926 W and [tex]\( V = 220 \text{ V} \)[/tex]:
[tex]\[ I = \frac{0.926}{220} \]\[ I \approx 0.00421 \text{ A} \][/tex]
PLEASE HELP FAST FOR 20p
If a 100 N force pulls to the West on an object and a second 100 N force pulls South on the object, which direction is the object likely to move?
equivalent force was applied
N
W E
S
because its is being pulled by south and west it will travel south west.
Which of these experiments would make use of quantitative data?
A
A study of the different amounts of time it takes water to evaporate completely
B
A study of the effects of sunlight on the color of construction paper
C
A study of the differences in cloud shapes on three successive days
a ) study of the different amounts of time it takes water to evaporate completely.
i always end up helping u <3 lol
Answer: A . A study of the different amounts of time it takes water to evaporate completely
Explanation:
The quantitative data can be define as the property or parameter which can be measured in units and counted in numbers. It can be represented in symbols, units and number code.
A is the correct option this is because of the fact that time can be measured in seconds, minutes and hours. Thus different amounts of time it takes water to evaporate completely can be a approach to conduct the experiment using quantitative data.
What best describes why kepler’s observation of planetary motion is a law instead of a theory
A hypothesis is a guess based off of previous dater or simply reasoning for the most logical outcome.
A theory is a statement that has evidence and facts supporting it but still has room for change or error.
A law is a proven statement that works in every possible case without exception and will never be disproved (unless it was wrongly named a law in the first place).
What parts of clam are likely to be preserved?
A:Hard parts
B:soft parts
C:all parts
D:No parts
the answer is a. hard parts.
The hard parts of clams are most likely to be preserved as fossils. Soft parts rarely survive the fossilization process due to their rapid decay, and complete fossil preservation including soft parts is extremely rare.
Explanation:When it comes to preservation, it is the hard parts of bivalves, which include clams, scallops, oysters, and mussels, that are more likely to be fossilized. These organisms have a shell composed of two parts that can open and close, which offers a durable structure capable of surviving long-term geological processes. The soft parts, such as the mouth, heart, intestine, gills, and stomach, typically decay and are rarely preserved; however, there are exceptional occurrences where conditions permit the preservation of soft tissues, as seen with some belemnite fossils, though this is extremely rare.
The alteration of hard parts is a common occurrence in fossil records, resulting in fossil preservation such as permineralization, recrystallization, replacement, carbonization, or dissolution. These processes affect the skeletal material of the hard parts, making them the principal components discovered in fossil records.
WILL GIVE BRAINLIEST PLZ HURRY!!!!
When the final velocity is less than the initial velocity, this is , options: speed time acceleration deceleration
When an object is having variable velocity then we can use the definition of acceleration to find it that rate of change in velocity is known as acceleration.
We can define it as
[tex]a = \frac{v_f - v_i}{\Delta t}[/tex]
here
[tex]v_f[/tex] = final velocity
[tex]v_i[/tex] = initial velocity
[tex]\Delta t[/tex] = time interval
now it is given here that final velocity is less than initial velocity after some time which means
[tex]v_f < v_i[/tex]
so here we can say acceleration will have negative value which shows it is opposite to the direction of velocity.
So this is the case of decreasing velocity which is known as deceleration.
So correct answer is
deceleration
urgent!
A 1.00-kg beaker containing 2.50 kg of oil (density = 916 kg/m3) rests on a scale. A 1.90 kg block of iron is suspended from a spring scale and completely submerged in the oil (Fig. P9.30). Find the equilibrium readings of both scales.
mass of iron block given as
[tex]m_1 = 1.90 kg[/tex]
density of iron block is
[tex]\rho = 7860 kg/m^3[/tex]
now the volume of the iron piece is given as
[tex]V = \frac{m}{\rho}[/tex]
[tex]V = \frac{1.90}{7860} = 2.42* 10^{-4} m^3[/tex]
Now when this iron block is complete submerged in oil inside the beaker the buoyancy force on the iron block will be given as
[tex]F_b = \rho_L V g[/tex]
here we know that
[tex]\rho_L[/tex] = density of liquid = 916 kg/m^3
[tex]F_b = 916* 2.42 * 10^{-4} * 9.8[/tex]
[tex]F_b = 2.17 N[/tex]
Now for the reading of spring balance we can say the spring force and buoyancy force on the block will counter balance the weight of the block at equilibrium
[tex]F_s + F_b = mg[/tex]
[tex]F_s + 2.17 = 1.90* 9.8[/tex]
[tex]F_s = 16.45 N[/tex]
So reading of spring balance will be 16.45 N
Now for other scale which will read the normal force of the surface we can write that normal force on the container will balance weight of liquid + container and buoyancy force on block
[tex]F_n = F_g + F_b[/tex]
[tex]F_n = (1 + 2.50)*9.8 + 2.17[/tex]
[tex]F_n = 34.3 + 2.17 = 36.47 N[/tex]
So the other scale will read 36.47 N
To find the equilibrium readings of the beaker and spring scale, use Archimedes' principle and the concept of buoyancy.
Explanation:In this question, we are given a beaker containing oil and a block of iron that is submerged in the oil. We need to find the equilibrium readings of both the beaker and the spring scale. To solve this problem, we can use Archimedes' principle and the concept of buoyancy.
The equilibrium reading of the beaker can be found by calculating the weight of the beaker and the weight of the oil it contains. The weight of the beaker can be obtained by multiplying its mass by the acceleration due to gravity, while the weight of the oil can be calculated using its density and volume. The equilibrium reading of the spring scale can be found by calculating the buoyant force acting on the block of iron. The buoyant force is equal to the weight of the fluid displaced by the block of iron, which can be calculated using the density of the oil, the volume of the block, and the acceleration due to gravity. Learn more about Equilibrium Readings here:
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Why do atoms bond?
Some atoms are sticky so they stick to other atoms.
They have too many electrons on their inner shell and need to give some away.
They want to fill up their nucleus in order to become stable.
They want to fill up their outer electron shell in order to become stable.
They want to fill up their outer electron shell in order to become stable. All things in life are made from atoms and all atoms want to reside in their lowest energy state because it is most stable. To do so, atom either share, give, or gain electrons to achieve this stability.
Which vector should be negative?
any vector whose magnitude is less than 1
a displacement in the direction North
the velocity of a falling object
any vector whose magnitude is greater than 1
Answer:
The velocity of a falling object
Explanation:
The positive X axis is towards right and positive Y axis is towards up, so North direction is positive
A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.
Any vector whose magnitude is greater than 1 is never be a negative vector.
The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.
a train engineer started the train from a standstill and sped up to 5 meters per second, she then rounded a corner at a constant speed. She then sped the train up to 10 meters per second on the next straightaway. Next, the train chugged around another bend at 10 m/sec, and then its speed slowed to 5 meters per second after coming out of the bend. Finally, the train reached the station, and the engineer applied the brakes and brought the engine to a stop. How many times did the train accelerate? Once a carousel is in motion, the constant movement of the carousel horse around the center of the circle can best be described as
The train accelerates four times during its journey, and the examples provided illustrate concepts of acceleration and uniform circular motion as they apply to trains, buses, and rides like the carousel.
The train described in the question undergoes acceleration several times throughout its journey:
When it speeds up from a standstill to 5 m/s.When it increases its speed from 5 m/s to 10 m/s on a straightaway.When it slows down from 10 m/s to 5 m/s after a bend.When it comes to a stop at the station.Overall, the train accelerates a total of four times. On the other hand, uniform circular motion, such as that of a carousel horse moving around the center, involves an object traveling in a circular path at a constant speed. Despite the speed being constant, because the direction is changing, the object is still experiencing a centripetal acceleration towards the center of the circle.
For example 10.2.3 regarding the slow acceleration of trains, we can calculate the train's movement and wheel's angular velocity after 200 revolutions given the wheel radius and angular acceleration. To find out how far the train has moved down the track, we can use the formula for the circumference of a circle (C = 2πr) multiplied by the number of revolutions. To find the final angular velocity, we can use the kinematic equation for rotational motion (ω2 = ω02 + 2αθ), where ω0 is the initial angular velocity (zero in this case), α is the angular acceleration, and θ is the angular displacement (total revolutions times 2π).
The train accelerated twice at two different points in its journey. In the first instance, it accelerated from a standstill to 5 meters per second, and in the second instance, it accelerated from 5 meters per second to 10 meters per second.
PLease Help!
Below is a picture of a swimmer in a river. Looking at the vectors being added is the swimmer going downstream or upstream?
Downstream, the current is helping the swimmer go faster relative to the land.
Upstream, the current is slowing the swimmer down.
Answer:
Downstream, the current is helping the swimmer go faster relative to the land.
Explanation:
As shown in the figure the resultant vector is the addition of velocity of water and velocity of swimmer.
This shows that the swimmer is in the direction along the flow of the current. Thus, answer is downwards, the current is helping the swimmer go faster relative to the land.
A jet airliner moving initially at 548 mph
(with respect to the ground) to the east moves
into a region where the wind is blowing at
343 mph in a direction 67◦
north of east.
What is the new speed of the aircraft with
respect to the ground?
Answer in units of mph.
Let's choose the "east" direction as positive x-direction. The new velocity of the jet is the vector sum of two velocities: the initial velocity of the jet, which is
[tex]v_1 =548 mph[/tex] along the x-direction
[tex]v_2 = 343 mph[/tex] in a direction [tex]67^{\circ}[/tex] north of east.
To find the resultant, we must resolve both vectors on the x- and y- axis:
[tex]v_{1x}= 548 mph[/tex]
[tex]v_{1y}=0[/tex]
[tex]v_{2x} = (343 mph)( cos 67^{\circ})=134.0 mph[/tex]
[tex]v_{2y} = (343 mph)( sin 67^{\circ})=315.7 mph[/tex]
So, the components of the resultant velocity in the two directions are
[tex]v_{x}=548 mph+134 mph=682 mph[/tex]
[tex]v_{y}=0 mph+315.7 mph=315.7 mph[/tex]
So the new speed of the aircraft is:
[tex]v=\sqrt{v_x^2+v_y^2}=\sqrt{(682 mph)^2+(315.7 mph)^2}=751.5 mph[/tex]
The new speed of the aircraft with respect to the ground, taking into account the wind speed and direction, is approximately 744.91 mph.
Explanation:To solve this problem, you should first break the wind's velocity into its eastward (x-component) and northward (y-component) using trigonometry. The eastward component is 343 mph x cos(67) = 134.87 mph, and the northward component is 343 mph x sin(67) = 313.37 mph.
Now, you can add the eastward component of the wind speed to the initial speed of the jet airliner (548 mph + 134.87 mph = 682.87 mph). The northward component of the wind's speed remains the same (313.37 mph) since the plane was initially moving only eastwards with no northwards component.
The new speed of the aircraft with respect to the ground (or resultant velocity) can be found using Pythagoras' theorem: √[(682.87)^2 + (313.37)^2] = 744.91 mph.
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A space station has a radius of 200m.
A. What period of rotation is needed to provide an artificial gravity of g at the rim?
For artificial gravity the the position of rim we have to rotate the space station
Due to rotation it will experience centripetal acceleration at the position of rim
Now in order to experience this acceleration to be same as gravity we can say centripetal acceleration must be equal to gravity here
[tex]a_c = g[/tex]
as we know that centripetal acceleration is given as
[tex]a_c = w^2R[/tex]
[tex]a_c = w^2*200 = g[/tex]
[tex]w^2* 200 = 9.8[/tex]
[tex]w = \sqrt{\frac{9.8}{200}}[/tex]
[tex]w = 0.22 rad/s[/tex]
now we know that angular frequency will be related to time period as
[tex]T = \frac{2\pi}{w}[/tex]
[tex]T = \frac{2\pi}{0.22}[/tex]
[tex]T = 28.4 s[/tex]
so it will rotated by time period T = 28.4 s
-What can you say about the snowboarder’s kinetic energy as he moves?
-Similarly, what can you say about the potential energy of the snowboarder?
-Based on your observations, what can you say about your prediction in Parts A and B above concerning the potential and kinetic energy?
Answer:
His kinetic energy increases, potential energy decreases
The sum of kinetic and potential energy is a constant at any instant before he comes to rest.
Explanation:
Snowboarder is starting from a height and moving to the down direction. As he moves down his velocity increases, we know that kinetic energy is given by the expression [tex]\frac{1}{2} mv^2[/tex], so as he moves his kinetic energy increases.
When the snowboarder is starting his potential energy is maximum(Potential energy = mgh), as he comes down his potential energy decreases.
Based on this we can conclude that the sum of potential energy and kinetic energy is a constant at any instant for a snowboarder before he comes to rest.
mgh+[tex]\frac{1}{2} mv^2[/tex]= Constant
Answer:
Answer:
His kinetic energy increases, potential energy decreases
The sum of kinetic and potential energy is a constant at any instant before he comes to rest.
Explanation:
Snowboarder is starting from a height and moving to the down direction. As he moves down his velocity increases, we know that kinetic energy is given by the expression , so as he moves his kinetic energy increases.
When the snowboarder is starting his potential energy is maximum(Potential energy = mgh), as he comes down his potential energy decreases.
Based on this we can conclude that the sum of potential energy and kinetic energy is a constant at any instant for a snowboarder before he comes to rest.
If v =5.00 meters/second and makes an angle of 60 with the negative direction of the y-axis coalculate the possible values of vx
An angle of 60 degrees with the negative y-axis could mean 60 degrees clockwise or counterclockwise, which translates to two possible angles (starting from the positive x-axis and moving counterclockwise) of 210 degrees or 330 degrees.
Then the horizontal component [tex]v_x[/tex] of a velocity vector [tex]\mathbf v[/tex] with magnitude [tex]5.00\,\dfrac{\mathrm m}{\mathrm s}[/tex] could be one of two expressions:
[tex]v_x=\left(5.00\,\dfrac{\mathrm m}{\mathrm s}\right)\cos210^\circ=-4.33\,\dfrac{\mathrm m}{\mathrm s}[/tex]
[tex]v_x=\left(5.00\,\dfrac{\mathrm m}{\mathrm s}\right)\cos330^\circ=4.33\,\dfrac{\mathrm m}{\mathrm s}[/tex]
What is another hypthesis that might expain hy hummingbirds seem to prefer red flowers
Because it's maybe the only color they see.
Electric field lines can never cross.
What would crossed electric field lines indicate?
A) a field pointing in two directions
B) an attractive force on a charge
C) a non uniform area
Of the field
D) a place where the field strength is zero
Answer:
the correct answer on E2020 is A.) a field pointing in two directions.
Electric field lines can never cross. The crossed electric field lines indicate a field pointing in two directions. The correct option is A.
What is electric field?The field developed around a charge. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of another charge.
Electric field lines originate from positive end and terminate to the negative end of the magnet.
So, the crossed electric field lines indicate a field pointing in two directions.
Thus, the correct option is A.
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What is the relationship between the internal energy of a substance and its state of matter? A) As a gas loses internal energy it becomes a plasma. Eliminate B) Closer packed atoms generally have more internal energy. C) As the internal energy decreases a substance will spread further apart. D) As the internal energy increases a substance would go from solid to a liquid.
D. As the internal energy increases a substance would go from solid to a liquid.
hope this helps :)
Answer: Option (D) is the correct answer.
Explanation:
Internal energy is defined as the minimum amount of energy present within the molecules of a substance.
More is the internal energy within the molecules of a substance more will be the number of collisions between them.
As a results, the particles will move away from each other and this leads to change in state of matter from solid to liquid and liquid to gaseous state.
Thus, we can conclude that the relationship between the internal energy of a substance and its state of matter is that as the internal energy increases a substance would go from solid to a liquid.
Physics Question, Please Help:
Which of the following can you determine from the graph of the force of the sun on a comet?
A) The force increases as the distance decreases.
B) The force is sometimes zero.
C) The force decreases as the distance decreases.
D) The force does not depend on the distance.
From that graph of the force of the sun on a comet, you can see that the force increases as the distance decreases. (A)
Here, we are required to determine the relationship between the force exerted by the sun on a Comet and the distance between the sun and the comet.
From the graph, the force exerted by the sun on the comet increases as the distance between them decreases.
From the graph, it is evident that the slope of the graph is negative.
Although, the slope of the graph is not constant as in the case of linear graphs (equation of a straight line).
However, the positioning of the line joining all points on the graph suggests that the slope of the graph is negative.
Consequently, the parameters ( i.e the force and distance) are inversely proportional to one another.
Therefore, as the force increases, the distance decreases.
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Which of the foolwing best define net force?
Net force can be defined as the sum of force acting on an object in all the directions
.i.e Net force= F acting on a body at upward direction+ F at downward direction+ F at leftward direction+ F at rightward direction.
e.g if a body is at rest the sum of forces acting on body in all direction is zero
but if a body is moving its mean body is facing an unbalanced net force.
Mrs. Newman’s class decides to perform an experiment during a class connect session to determine how long it takes different objects to hit the floor when dropped from the student’s desk. Each student dropped three notebooks, one weighing 0.5 pound, one weighing 1.0 pound, and one weighing 2.5 pounds. What would you predict about the times it took for each of them to hit the floor?
a) The 0.5lb notebook would hit the floor first
b) The 0.5lb notebook would hit the floor last
c) The 2.5lb notebook would hit the floor first
d) All notebooks would fall at the same time
e) All notebooks would remain suspended in the air
D, all notebooks would hit the floor at the same time. The time it takes to hit the floor is independent of their weight, but rather dependent on the acceleration of gravity. Since gravity is constant, they will all hit the floor at the same time.
the correct answer would be D because they all have the same gravitational pull
A gorilla is hanging motionless on a tree branch. If the gorilla's weight is 400 Newtons, what must be the tension in the tree branch?
let's convert 400 newtons to Kg, which is 40.7886.
now we put it in a formula that includes gravity and acceleration
(40.7886 kg) ( 9.8 m/s2) + (40.7886 kg) (0)
now we come up with the answer of 399.72828 kg or 3920 Newtons
Not sure which unit you are looking for but they are both there.
A car accelerates from rest at 3.6 m/s 2 . How much time does it need to attain a speed of 5 m/s?
car starts from rest
[tex]v_i = 0[/tex]
final speed attained by the car is
[tex]v_f = 5 m/s[/tex]
acceleration of the car will be
[tex]a = 3.6 m/s^2[/tex]
now the time to reach this final speed will be
[tex]t = \frac{v_f - v_i}{a}[/tex]
[tex]t = \frac{5 - 0}{3.6}[/tex]
[tex]t = 1.39 s[/tex]
so it required 1.39 s to reach this final speed
To calculate the time to reach 5 m/s from rest with an acceleration of 3.6 [tex]m/s^2[/tex], the kinematic equation v = u + at is used, where u is zero. Solving for t gives 1.39 seconds.
The question asks about the time it takes for a car to reach a certain speed given a constant acceleration, which falls under the subject of Physics.
To find the time required for the car to attain a speed of 5 m/s from rest with an acceleration of 3.6 [tex]m/s^2[/tex], you use the kinematic equation:
v = u + at
where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Since the car starts from rest, the initial velocity u is 0, and we can rearrange the formula to solve for time:
t = (v - u) / a
Plugging in the given values:
t = (5 m/s - 0 m/s) / 3.6 [tex]m/s^2[/tex] t = 5 / 3.6 t = 1.39 seconds
Thus, the car needs approximately 1.39 seconds to accelerate to 5 m/s.
If a rock climber accidentally drops a 77.5-g piton from a height of 215 meters, what would its speed be just before striking the ground? ignore the effects of air resistance.
Let us list out what we know from the question.
Initial Velocity [tex]V_{i} = 0[/tex] since the piton is 'dropped'.
Vertical Displacement of the piton D = 215 m
Acceleration due to gravity [tex]a = 9.8 m/s^{2}[/tex]
Final Velocity [tex]V_{f} = ?[/tex]
Using the equation, [tex]V^{2} _{f} = V^{2} _{i} + 2aD[/tex] and plugging in the known values, we get
[tex]V^{2} _{f} = 0^{2} + 2(9.8)(215)[/tex]
Simplifying by taking square-root on both sides gives us [tex]V_{f} = 64.915 m/s[/tex]
Thus, the speed of the piton just before striking the ground is 65 m/s.
The speed of the piton just before striking the ground would be approximately 64.94 meters per second.
To determine the speed of the piton just before it strikes the ground, we can use the kinematic equation for an object in free fall under the influence of gravity, ignoring air resistance. The equation is:
[tex]\[ v = \sqrt{2gh} \][/tex]
Given:
- The mass of the piton (m) is [tex]\( 77.5 \, g \)[/tex] or [tex]\( 0.0775 \, kg \)[/tex] (since [tex]\( 1 \, g = 0.001 \, kg \))[/tex],
- The height (h) is 215 m.
We can plug these values into the equation:
[tex]\[ v = \sqrt{2 \times 9.81 \, m/s^2 \times 215 \, m} \] \[ v = \sqrt{2 \times 9.81 \times 215} \] \[ v = \sqrt{4217.7} \] \[ v \approx 64.94 \, m/s \][/tex]
What is the appropriate unit of measurement for pitch?
The appropriate unit of measurement for pitch is mel.
There are several definitions of 'pitch', but I think you mean how 'high' or 'low' a sound sounds to our ear.
If that's it, then you're talking about the frequency of the sound, and the unit is 'vibrations per second' or 'Hertz' (Hz) .
A copper penny has a mass of 3.1 g and a volume of 0.35 cm3. What is the density of copper? Be sure to show your work and include units.
The density of copper that has a mass of 3.1 g and a volume of 0.35 cm³ is 8.86g/cm³
HOW TO CALCULATE DENSITY:
The density of a substance can be calculated by dividing the mass of the substance by its volume as follows:Density (g/cm³) = mass (g) ÷ volume (cm³)According to this question, copper has a mass of 3.1 g and a volume of 0.35 cm³, hence, the density can be calculated as follows:Density (g/cm³) = 3.1g ÷ 0.35cm³Density of copper = 8.86g/cm³Therefore, the density of copper that has a mass of 3.1 g and a volume of 0.35 cm³ is 8.86g/cm³.Learn more at: https://brainly.com/question/2040396?referrer=searchResults