Answer:
All of the above
Explanation:
because these are all senses of the body and therefore you're receiving signals from all of them all the time
Answer:
D. All of the above.
Explanation:
An observation is received directly or indirectly by all of the above. When observing things, you need to visually be able to see what is being observed, and be able to touch hear and even taste. This ensures that you can get the best out of the observation.
In the graph, which region shows nonuniform positive acceleration?
A.AB
B.BC
C.CD
D.OA
Answer: A.AB
Explanation:
This Velocity vs Time graph shows the acceleration of a body or object, since acceleration is the variation of velocity in time.
As we can see in the attached image, the graph can be divided in four segments:
OA: In this segment the acceleration is changing at a uniform rate. In addition we can see it has a positive slope, hence we are dealing with a positive uniform acceleration.
AB: In this segment the acceleration is changing at a nonuniform rate, since in this part it is not possible to calculate the slope. However if this were uniform, the slope woul be positive. This means the acceleration is nonuniform and positive.
BC: In this segment the acceleration is changing at a nonuniform rate, since in this part it is not possible to calculate the slope. However if this were uniform, the slope woul be negative. This means the acceleration is nonuniform and negative.
CD: In this segment the acceleration is changing at a uniform rate. In addition we can see it has a negative slope, hence we are dealing with a negative uniform acceleration.
From all these segments, the only one that fulfils the nonuniform positive acceleration condition is option A:
Segment AB
Answer:
AB plato users ;)
Explanation:
Many theories about atomic structure have molded the current view of the
atom. The quantum model suggests that electrons
Answer:
Orbit around the nucleus at specific energy levels
Explanation:
In the quantum model of the atom (Bohr's model), electrons orbit the nucleus at specific orbits corresponding to specific energy level - this means that an electron cannot be found in the space between two orbits.
Since each orbit correspond to a a precise energy level, this means that the spectrum of emission and absorption of an atom is discrete. In fact:
- When an electron jumps from a lower energy level to a higher energy level, it absorbs a photon whose energy is equal to the difference in energy between the two levels - so photons of only specific frequencies are absorbed
- When an electron jumps from a higher energy level to a lower energy level, it emits a photon whose energy is equal to the difference in energy between the two levels - so photons of only specific frequencies are emitted
for a machine, the input force is 30 N, and the input distance is 2 m. Factoring in the effect of friction, what must be true about the work output?
A. It must be greater than 60 J
B. It equals 60 J.
C. It must be less than 60 J
Answer:
C. It must be less than 60 J
Explanation:
The work going into the machine is the product of the force and distance:
W = Fd
W = (30 N) (2 m)
W = 60 J
The work out of the machine is less than this due to the frictional losses.
Answer:
C. It must be less than 60 J
if an object that stands 3 cm high is placed 12 CM in front of a plane mirror how far from the mirror is the image located explain your reasoning
Answer:
the mirror is 12 cm away from the image
Explanation:
Answer:
distance of image = 12 cm
Explanation:
For plane mirror the perpendicular distance of object from the mirror must be same as that of perpendicular distance of image from the mirror
As we know here that object is 3 cm high
But the distance of object from mirror is 12 cm
So here the image will be virtual and it will form at 12 cm distance behind the mirror.
So here image will form behind the mirror at same distance that is the distance of object from the mirror.
1. The bottom of an elevated water tank has an
area of 135 m². If the pressure on the bottom is
1.52 x 104 Pa, what is the total force the bottom
must support?
Answer:
2.05×10⁶ N
Explanation:
Force = pressure × area
F = (1.52×10⁴ Pa) (135 m²)
F = 2.05×10⁶ N
The total force the bottom of the tank needs to support is calculated using the formula for pressure which is Pressure = Force / Area. By rearranging this formula to get Force = Pressure x Area, and substituting the given values, we find that the total force is 2.052 x 106 Newtons.
Explanation:The subject of this question is from the field of Physics and it revolves around concepts of fluid pressure and force. The student is asked to calculate the total force exerted on the bottom of a water tank due to the pressure of the water above it. In physics, we know that pressure is defined as the force applied perpendicular to the surface of an object, per unit area. Mathematically this can be represented as Pressure = Force / Area. If we rearrange this equation to find Force, it transforms into Force = Pressure x Area.
Given in the question, the Pressure (P) is 1.52 x 10⁴ Pa and Area (A) is 135 m². Substituting these values into the equation gives us : Force = 1.52 x 104 Pa x 135 m² = 2.052 x 10⁶ N. Therefore, the bottom of the tank must support a force of 2.052 x 10⁶ Newtons.
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Rachel and her family live in a region where Cacti, shirt grasses, and small bushes flourish. In which Boone do they live?
Answer:
Most likely the Savanna or Desert.
Explanation:
Answer:
Explanation:
Rachel and her family is most suppose to be living in a desert area.
The forest and vegetation of a desert is similar to what described location of Rachel family. The region has Cacti, short grasses and small bushes flourish.
These natural vegetation is grown in desert as they do not need much water for there growth.
- When a person does work on an object, the object gains energy. As a bicycle rider rides from the bottom to the top of a hill, the
energy from the work can become which combination of types of energy.
The riders work becomes kinetic energy only
The riders work becomes a combination of kinetic energy and heat
The riders work becomes a combination of gravitational potential and heat
The riders work becomes a combination of gravitational potential,
energy and heat
Answer:
The riders work becomes a combination of gravitational potential,
kinetic energy and heat.
Explanation:
His work becomes gravitational potential as the raider gains height. This can be seen from the equation of gravitational potential:
[tex]U = m*g*h[/tex],
where m is the mass, g is the gravity and h is the height. Since the rider's final position is higher than his starting position the change of gravitational position is greater than 0.
His work becomes kinetic energy as he gains speed: assuming he was at rest at starting position he must increase his speed to move to the top of the hill, and because kinetic energy depends on speed, part of his work becomes kinetic energy.
Finally, part of his work turns into heat due to all the losses because of the friction in the bicycle gears.
Answer:
4
Explanation:
A telephone wire has a current 20A flowing through it . How long does it take for a charge of 15 C to pass through the wire?
It will take 0.75 s for a charge of 15 C to flow through the wire.
The quantity of electricity flowing through a wire is related to current and time according to the following equation:
Q = ItWhere
Q is the quantity of electricity
I is the current
t is the time
With the above formula, we can calculate the time taken for the 15 C to flow through the wire. This can be obtained as follow:
Quantity of electricity (Q) = 15 C
Current (I) = 20 A
Time (t) =?Q = It
15 = 20 × t
Divide both side by 20
[tex]t = \frac{15}{20}\\\\[/tex]
t = 0.75 sTherefore, it will take 0.75 s for a charge of 15 C to flow through the wire.
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It takes a pulse of light 35 microseconds to travel down a 5.0 km length of fiber optic cable. How fast does light move through the cable (in m/s)?
A particle starts at the origin and moves away from it in a straight line. After 1.6 seconds, it is 12.8 meters from the origin. It then reverses direction due to a force field with a like charge. After 3.8 seconds total, the particle is at −9.23 m. What is the average velocity of the particle? 3.8 m/s −5.8 m/s −2.4 m/s 13.8 m/s
Answer:
Average velocity of the particle is[tex]-2.4 m/s[/tex]
Explanation:
Average velocity is defined as the total velocity divided by the total time. It is given by the equation[tex]v_av= \frac{displacement}{(total time taken)}[/tex]
In the given problem the particle starts from origin, travels [tex]12.8 m[/tex] and then reverses direction and travels till [tex]-9.23 m[/tex] within a total time of [tex]3.8 seconds.[/tex]
Displacement is defines as the shortest distance between initial and final point.
Here displacement = [tex]- 9.23 m[/tex]
total time=[tex]3.8 s[/tex]
[tex]v_av=-9.23/3.8=-2.4 m/s[/tex]
If the distance between two charge particles is increased by four, the force will decrease by a factor of
Answer:
16
Explanation:
the force is inverse squred proportaional to the distance
Answer:
16
Explanation:
just did it on edg
The biggest piece of fudge ever created weighed 3010 lbs. The recommended serving of fudge is 28g. How many servings did this piece of fudge have?
For this case we must do a conversion from pounds to grams. By definition we have to:
1 pound equals 453,592 grams.
So:
[tex]3010 lb * \frac {453.592} {1} \frac {g} {lb} = 1,365,311.92\ grams[/tex]
If we divide we get the number of portions:
[tex]\frac {1,365,311.92} {28} = 48,761.14[/tex]
Thus, we have approximately 48,761 servings of sugar candy.
ANswer:
48,761 servings of sugar candy.
Final answer:
To find the number of servings, the weight of the biggest piece of fudge created (3010 lbs) was converted to grams, yielding 1,365,312.92 grams. Dividing this by the recommended serving size of 28 grams gives a total of 48,761.89 servings.
Explanation:
To calculate the number of servings in the biggest piece of fudge ever created that weighed 3010 lbs, we first need to convert the weight from pounds to grams, because the recommended serving size of fudge is given in grams (28g).
1 pound is equivalent to 453.592 grams. Therefore, we need to multiply the total weight in pounds by this conversion factor:
3010 lbs × 453.592g/lbs = 1,365,312.92 grams
Now that we have the weight of the fudge in grams, we can divide it by the recommended serving size:
1,365,312.92 grams ÷ 28 grams/serving = 48,761.89 servings
Therefore, the biggest piece of fudge ever created had 48,761.89 servings.
What is suspension?
Answer:
A suspension is essentially a damped spring producing opposing force when being compressed. ... The force produced by the dampers depend on how fast the suspension is being compressed or elongated (contact speed), opposing the movement. When a wheel is lifted from the ground the suspension produces no force.
friction changes the energy of an object from kinetic energy to _____________ energy?
electric
stored
solar
heat
wind
Friction converts kinetic energy into heat energy as surfaces in contact oppose each other's motion, resulting in an increase in the system's thermal energy. The correct answer is: heat.
Friction changes the energy of an object from kinetic energy to heat energy. When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into heat. This conversion occurs because the force of friction acts against the motion, causing the surfaces to heat up due to the energy transfer.
Kinetic energy is the energy which a body possesses by virtue of being in motion. However, when there is kinetic friction, the irregularities on the two sliding surfaces interact to convert some of the mechanical energy into thermal energy, which is the energy stored in the motion of atoms and molecules that make up a material. The heat energy can raise the thermal energy of the system, resulting in an increase in temperature of the objects involved.
The acceleration of segment D is m/s2. Rank segments A, B , C from least accelerations to greatest acceleration. Least
Greatest
Segment D is -20 m/s squared
C
B
A
I know because I just did this
Segments A, B, and C can be ranked from least to greatest acceleration based on the given information.
Explanation:The segments A, B, and C can be ranked from least to greatest acceleration as follows:
Segment C: The acceleration is zero, indicating that there is no change in velocity.Segment A: The acceleration is constant and positive, meaning there is a gradual increase in velocity.Segment B: The acceleration is constant and larger in magnitude than segment A, indicating a faster increase in velocity.Learn more about Ranking accelerations here:https://brainly.com/question/20389053
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A ball is thrown straight up at an initial speed of 9.8m/s and, on returning to your hand, hits it moving downward at the same speed. If the whole trip took 2.0s, determine the ball’s (a) average acceleration and (b) average velocity.
Answer:
-9.8 m/s²
0 m/s
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (-9.8 m/s − 9.8 m/s) / 2.0 s
a = -9.8 m/s²
Average velocity is the change in position over change in time.
v = Δx / Δt
v = (0 m − 0 m) / 2.0 s
v = 0 m/s
In terms of Physics, the ball's average acceleration is 0 m/s² and the average velocity is also 0 m/s due to the ball returning to its initial position, making the total displacement 0.
Explanation:The subject of this question is Physics and it would be typically asked at the High School level.
(a) The ball’s average acceleration during the entire journey can be determined by the equation for motion which is: a = Δv/Δt. Here, Δv (the change in velocity) is 0 as the ball starts and ends at the same speed (it just changes direction, which is not considered in average acceleration), and Δt is the time it takes for the journey, which is 2.0 seconds. Therefore, a=0/2.0 = 0 m/s².
(b) The average velocity of an object is the total displacement (total distance travelled in a specific direction) divided by the amount of time taken to travel this distance. In this case, the ball returns to the starting point, making the total displacement 0. Therefore, the average velocity is 0/2.0 = 0 m/s.
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PLEASE HELP!!
The centers of two 15.0-kilogram spheres are separated by 3.00 meters. What is the magnitude of the gravitational force that one sphere exerts on the other?
A
1.11 × 10-10 N
B
3.34 × 10-10 N
C
1.67 × 10-9 N
D
5.00 × 10-9 N
Answer:
C 1.67 × 10-9 N
Explanation:
The magnitude of the gravitational force between two objects is given by:
[tex]F=G\frac{m_1 m_2}{r^2}[/tex]
where
G is the gravitational constant
m1 ,m2 are the masses of the two objects
r is their separation
In this problem, we have:
[tex]m_1 = m_2 = 15.0 kg[/tex]
r = 3.00 m
Substituting into the equation, we find
[tex]F=(6.67\cdot 10^{-11}) \frac{(15)(15)}{3.00^2}=1.67\cdot 10^{-9} N[/tex]
The gravitational force between two 15.0 kg spheres separated by 3.00 meters is calculated to be approximately 1.67 × 10⁻⁹ N. Therefore, the correct answer is option C.
Newton's Law of Universal Gravitation:
F = G * (m₁ * m₂) / d²where,
F is the gravitational forceG is the gravitational constant (6.674 × 10⁻¹¹ N·m²/kg²) m₁ and m₂ are the masses of the spheresd is the distance between their centers.Plugging in the given values:
F = 6.674 × 10⁻¹¹ N·m²/kg² * (15.0 kg * 15.0 kg) / (3.00 m)²F = 6.674 × 10⁻¹¹ N·m²/kg² * 225 kg² / 9.00 m²After simplifying:
F ≈ 1.67 × 10⁻⁹ NThus, the correct answer is C (1.67 × 10⁻⁹ N).
A model rocket climbs 200 m in 4 seconds. If was moving 10 m/s to begin with what is its final velocity
Answer: 90 m/s
Explanation:
For this situation we will use the following equations:
[tex]y=V_{o}t+\frac{1}{2}at^{2}[/tex] (1)
[tex]V=V_{o} + at[/tex] (2)
Where:
[tex]y=200 m[/tex] is the height of the model rocket at 4 s
[tex]V_{o}=10 m/s[/tex] is the initial velocity of the model rocket
[tex]V[/tex] is the velocity of the rocket at 4 s
[tex]t=4 s[/tex] is the time it takes to the model rocket to reach 200 m
[tex]a[/tex] is the constant acceleration due gravity and the rocket's thrust
Firstly, from equation (1) we have to find [tex]a[/tex]:
[tex]200 m=(10 m/s)(4 s)+\frac{1}{2}a(4 s)^{2}[/tex] (3)
[tex]a=20 m/s^{2}[/tex] (4)
Now we have to substitute this value of [tex]a[/tex] in (2):
[tex]V=10 m/s + (20 m/s^{2})(4 s)[/tex] (5)
Finally:
[tex]V=90 m/s[/tex] This is the rocket's final velocity
why does the bottom of a swimming pool always appear shallower than it actually is
Answer:
The refraction of light at the surface of water makes ponds and swimming pools appear shallower than they really are.
Explanation:
so its just the refraction of light at the surface
Answer:
The refraction of light at the surface of water makes ponds and swimming pools appear shallower than they really are. If you look at a stick that is poking into some water at an angle the stick looks bent because of refraction. The bottom of the stick seems to be nearer the surface of the water than it really is.
Explanation:
Question 4 of 10
2 Points
What is the internal energy of 7.00 mol of N2 gas at 40°C? To solve this
problem, use the equation: Udiatomie Gas =
Remember that R=8.31 J/(mol-K) and K = °C + 273.
O A 45.500
O B. 5820
O C. 11,600
O D. 18.2003
Answer:
A. 45500 J
Explanation:
Internal energy of diatomic gas is:
U = 5/2 nRT
where n is the number of moles,
R is the universal gas constant,
and T is the absolute temperature.
Given n = 7.00 mol, R = 8.31 J/mol/K, and T = 40+273 = 313 K:
U = 5/2 (7.00 mol) (8.31 J/mol/K) (313 K)
U = 45500 J
Final answer:
Option C) The internal energy of 7.00 mol of N2 gas at 40°C is 8.62 × 10⁴ J, which is best approximated by option C (11,600 J) when considering significant figures.
Explanation:
The question is asking for the internal energy of a diatomic gas, specifically nitrogen gas (N2), at a certain temperature. The internal energy (U) of an ideal diatomic gas can be calculated using the formula [tex]U = (\frac{5}{2}) nRT[/tex], where 'n' is the number of moles, 'R' is the ideal gas constant, and 'T' is the temperature in Kelvin.
Firstly, convert the temperature from Celsius to Kelvin by adding 273 to the given temperature (40°C), resulting in T = 313 K. Now, use [tex]U = (\frac{5}{2}) nRT[/tex] with n = 7.00 mol, R = 8.31 J/(mol·K), and T = 313 K.
[tex]U = (\frac{5}{2}) \times 7.00 mol \times 8.31 J/(mol.K) \times 313 K = 86212.15 J[/tex]
When this value is rounded to the correct number of significant figures and expressed in scientific notation, it becomes 8.62 × 10⁴ J, which matches option C when written as 86200 J or 86.2 kJ.
Traveler A starts from rest at a constant acceleration of 6 m/s^2. Two seconds later, traveler B starts with an initial velocity of 20 m/s at the same acceleration of 6 m/s^2. as measured by a, at what time will traveler B overtake traveler A?
a. 0.4s
b. 1.5s
c. 2.0s
d. 2.5s
e. 3.5s
Answer:
3. 3.5 s
Explanation:
The position of traveller A is given by the equation:
[tex]x_A(t) = \frac{1}{2}a t^2[/tex]
where
[tex]a = 6 m/s^2[/tex] is the acceleration of A
t is the time measured from when A started the motion
The position of traveller B instead is given by
[tex]x_B(t) = u_B (t-2) + \frac{1}{2}a(t-2)^2[/tex]
where a (acceleration) is the same as traveller A, and
[tex]u_B = 20 m/s[/tex]
is B's initial velocity. We can verify that the formula is correct by substituting t=2, and we get [tex]x_B=0[/tex], which means that B starts its motion 2 seconds later.
Traveller B overtakes traveller A when the two positions are the same, so:
[tex]x_A = x_B\\\frac{1}{2}at^2 = u_B (t-2) + \frac{1}{2}a(t-2)^2\\\frac{1}{2}at^2 = u_B t - 2u_B +\frac{1}{2}at^2 +2a-2at\\u_Bt-2at = 2u_B-2a\\t=\frac{2u_B-2a}{u_B-2a}=\frac{2(20)-2(6)}{20-2(6)}=3.5 s[/tex]
Pauline is going on a picnic and bringing some sandwiches. She wants to keep the sandwiches cold for as long as possible by putting them in a cooler.
Which of these would be the best material for Pauline's cooler to be made of?
A.
aluminum
B.
glass
C.
iron
D.
plastic
Answer:
The correct answer is plastic.
Explanation:
To keep sandwiches cold as long as possible by putting them in a cooler the best material is plastic. The plastic is a thermal insulator used for different uses. One of them is to maintain the temperature in closed containers. Metal and aluminum allow the temperature to flow more easily and glass is not a suitable material for building the cooler.
Have a nice day!
For our statistical definition of entropy, we use the equation S = klnW. In this equation, what does k represent? A. kelvin B. Fludd's constant: 6.02 × 1023 C. Carnot's constant: 9.8 × 10–8 D. Boltzmann's constant: 1.38 × 10–23
In the equation [tex]S=klnW k[/tex] represents Boltzmann constant
Answer: Option D
Explanation:
Entropy is defined as the degree of randomness of a system. In the given equation S represents entropy of the gas, k represent Boltzmann constant and W represents number of micro states possible.
W or number of micro states means the number of ways atoms and molecules ca be arranged in a thermodynamic system. When number of micro states is more the degree of randomness namely the entropy is more.
In solid to liquid transformation the entropy increases. Similarly liquid to gas transformation also increases the entropy of the system increases.
Answer: D.
Boltzmann's constant: 1.38 × 10⁻²³
Explanation: edmentum
Current functional magnetic resonance imaging (fMRI) technology allows researchers to:
a. Predict the likelihood of developing Alzheimer's disease.
b. Diagnose most forms of mental illness.
c. Identify selected sentences that a person reads in a scanner.
d. Read a person's private thoughts at a distance.
fMRI technology allows researchers to analyze brain activity by tracking blood flow changes related to neural activity. It can identify selected sentences that a person reads in a scanner, but it cannot predict Alzheimer's, diagnose most mental illnesses, or read private thoughts at a distance.
Explanation:Current functional magnetic resonance imaging (fMRI) technology enables researchers to observe and analyze changes in the brain's activity over time by tracking blood flow and oxygen levels. fMRI is utilized for a variety of medical and psychological assessments. It is highly effective at mapping brain function and determining the functioning of various regions involved in thought and motor control. Specifically, fMRI can measure changes in blood flow associated with neural activity and can thereby generate a detailed map showing the most active parts of the brain during a given task.
Answering the student's multiple-choice question, among the provided options, fMRI technology can c. Identify selected sentences that a person reads in a scanner. The ability to predict the development of Alzheimer's, diagnose most forms of mental illness, or read a person's private thoughts at a distance is not explicitly achievable with the current fMRI technology.
A ball rolled 10 meters in 2 seconds. Its velocity is m/s
Answer:
velocity is 5m/s
Explanation:
data
d=10m
t=2sec
v=?
from
v=d/t
v=10m/2s
v=5m/s
Its SPEED is (10m/2s) = 5 m/s .
It's not possible to determine its velocity from the given information, because we don't know the direction in which it rolled.
The main goal of science is to
1)Collect facts and learn “the truth”
2)Understand nature
3)Do wild and crazy experiments
4)Is to produce facts
Answer:
2. Understand nature
Explanation:
The main goal of science is to understand nature, because you need to find the best explanations for how nature works.
You are measuring the mass of different chemicals to get ready to conduct an experiment.
Which one would be a example of the correct International System of Measurement units to use for measuring mass?
A) ounces
B) grams
C) pounds
D) tablespoo
Answer:
B) grams
The SI unit for mass is grams.
Answer:
The answer is grams
Explanation:
Which of the following is derived unit?
A: g (grams, mass)
B: m (meters,length)
C: s (seconds, time)
D: m2 (square meters, area)
Answer:
D: m² (square meters, area)
Explanation:
Derived units are a combination of SI base units. m² is the only option that's a combination of base units (meters times meters).
What are four examples of properties?
Explanation:
physical and chemical properties. Examples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density. There are many more examples.
determine the average acceleration for x(t)=19t^2+7t^3 for a time interval between 3 and 9 seconds
Answer:
290
Explanation:
Average acceleration is the change in velocity over change in time.
First, find the velocity by taking the derivative of position.
v(t) = dx/dt
v(t) = 38t + 21t²
At t = 3 and t = 9:
v(3) = 303
v(9) = 2043
So the average acceleration is:
a = Δv / Δt
a = (2043 − 303) / (9 − 3)
a = 290
Use appropriate units.