PLEASE HELP I'M LOST.
Match the definitions with the correct name.
(A )A force that all objects have.
(B) A positive particle in the nucleus of an atom.
(C) A negative particle always in motion surrounding the nucleus of an atom.
(D) What two opposite charges do.
(E) What two like charges do.

names:
1. Proton
2. Electron
3. Electric charge
4. Attract
5. Repel

Answers

Answer 1

A - 3
B - 1
C - 2
D - 4
E - 5

Related Questions

a 90 kg architect is standing 2 meters from the center of a scaffold help up by a rope on both sides. the scaffold is 6m long and has a mass of 200kg. what is the tension on each rope

Answers

We can solve the problem by requiring the equilibrium of the forces and the equilibrium of torques.

1) Equilibrium of forces:
[tex]T_1 - W_p - W_s + T_2 =0[/tex]
where
[tex]W_p = (90kg)(9.81 m/s^2)=883 N[/tex] is the weight of the person
[tex]W_s = (200kg)(9.81 m/s^2)=1962 N[/tex] is the weight of the scaffold
Re-arranging, we can write the equation as
[tex]T_1 = 2845 N-T_2[/tex] (1)

2) Equilibrium of torques:
[tex] T_1 \cdot 3 m - W_p \cdot 2 m - T_2 \cdot 3m =0[/tex]
where 3 m and 2 m are the distances of the forces from the center of mass of the scaffold.
Using [tex]W_p = 883 N[/tex] and replacing T1 with (1), we find
[tex]2845 N \cdot 3 m - T_2 \cdot 3 m - 833 N \cdot 2 m - T_2 \cdot 3 m=0[/tex]
from which we find
[tex]T_2 = 1128 N[/tex]

And then, substituting T2 into (1), we find
[tex]T_1 = 1717 N[/tex]

Little Joey jumps into a pool on a cool fall morning. How can we describe the direction of energy transfer and temperature change between Joey and the water?

A) Energy is transferred from Joey to the water. The temperature of the water increases.
B) Energy is transferred from the water to Joey. The temperature of the water increases.
C) Energy is transferred from the water to Joey. The temperature of the water decreases.
D) Energy is transferred from the Joey to the water. The temperature of the water decreases.

Answers

Hello!

Energy always flows from hot to cold so the best answer would be A. Even though it will be a small change due to the difference in masses and the difference in body temp and the pool water on a cool morning.

Hope this helps. Just remember heat/energy always flows from hot to cold. Never the reverse. So whatever is more hot has heat energy to give up to the other.

Any questions please ask. Thank you so much.

Answer:

Explanation:

Based on the diagram of a roller coaster car on a roller coaster track, what statement is true?
A) The car at point A has more kinetic energy than the car at point C.
B) The car at point C has less kinetic energy than the car at point B.
C) The car at point C has more kinetic energy than the car at point B.
D) The car at point D has less potential energy than the car at point B.

Answers

Answer:

B) The car at point C has less kinetic energy than the car at point B.

Explanation:

We have two types of energy involved in this situation:

- Gravitational potential energy: this is the energy related to the heigth of the car, and it is given by [tex]U=mgh[/tex], where m is the mass of the car, g is the gravitational acceleration, and h is the heigth of the car. The potential energy is higher when the car is located higher above the ground.

- Kinetic energy: this is the energy due to the motion of the car, and it is given by [tex]K=\frac{1}{2}mv^2[/tex], where m is the mass of the car and v is its speed. The kinetic energy is higher when the speed of the car is higher.

- The law of conservation of energy states that the total mechanical energy of the car (sum of potential energy and kinetic energy: [tex]E=U+K[/tex]) is constant). This implies that when the car is at a higher point, the kinetic energy is less (because U is larger, so K must be smaller), while when the car is at a lower point, the kinetic energy is larger.

- Based on what we have written so far, we can conclude that the correct statement is:

B) The car at point C has less kinetic energy than the car at point B.

Because the car at point C is located at a higher point than point B, so the car at point C has larger potential energy than at point B, which implies that car at point C has less kinetic energy than the car at point B.

Answer: The answer is C

A car at point B has more kinetic energy than the car at point D.

Kinetic energy is energy at work.

Potential energy is stored energy.

While exploring a section of land far from the sea, an explorer discovers a dome-shaped geologic structure with gently sloping sides. Which of the following has the explorer most likely discovered?

Answers

If your choices are the following:

A faultblock mountain
A folded mountain
A hotspot volcano
A volcanic arc

Then the answer is A folded mountain. It is formed when an earthquake happened and this was the result of the movement of the plates.

Answer:

the answer is A folded mountain. It is formed when an earthquake happened and this was the result of the movement of the plates.

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