The picture above shows 3 sets of balloons, all with a particular charge. Which of the picture(s) is true? Explain. Then explain why the other 2 pictures are incorrect. Make sure to explain all 3 sets.
samuelbtta avatar

Answers

Answer 1
Answer: Among all of the others Picture 3 is correct.

We know, Like charges repel each other whereas unlike charges attract each other, In picture 3 they are like charges (both are positive) so, we can repulsion hence, picture is correct!

In picture 1, they are unlike charges, & showing repulsion which is wrong, same In picture 2, they are like charges & showing attraction so they are wrong as well

Hope this helps!
Answer 2
Answer: C is correct because they would repel each other A is wrong be they wouldn't repel And B is wrong because they shouldn't be repelling each other

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The Earlybird communications satellite hovers over the same point on Earth's equator indefinitely. This is because _____. A. its orbital period is 24 hours B. it is beyond the main pull of gravity C. it pulls as hard on Earth as Earth pulls on it D. it is kept aloft by ground control E. forces other than Earth's gravity act on it

Answers

A. its orbital period is 24
The Earlybird ... and every TV satellite ... hovers over the same point
on Earth's equator indefinitely because its orbit is continually adjusted
to ...

-- be in the plane of the equator,

-- be as perfectly circular as possible,

-- have a period exactly equal to the Earth's rotation period ...
about 23 hours 56 minutes 4 seconds, not 24 hours. 

What is the speed of sound, when travelling through steel?

Answers

20000 ft/s or 6100 m/s


As a moving object's velocity decreases, its momentum decreases.Please select the best answer from the choices provided
T
F

Answers

Explanation :

The momentum of an object is defined as the product of its mass and the velocity with which it is moving. It is denoted as p.

Mathematically, it is written as :

p=mv

m is the mass of an object

v is the velocity

So, it is clear that the momentum of an object is directly proportional to its velocity.

The statement "as a moving object's velocity decreases, its momentum decreases" is absolutely true.

From the choices provided, the better answer is 'T'. The other one does not apply.

Recognize the relationship between stiffness of the medium and the speed of a wave.

Answers

The relationship between the stiffness of a medium and the speed of the wave is directly proportional. Because molecules are closer in a stiff medium, an increase of stiffness in a medium would also result to an increase in which a wave travels. 

Potential and kinetic energy 1. An apple falling from a tree
2. A stationary ball on the ground
3. A sleeping dog
4. A boy running across the street
5. A car traveling on the road
6. A stretched rubber band
7. A basketball being thrown
8. A girl biking at the park
9. A leaf lying on the ground
10. A planet revolving around a star

Answers

Here's how potential and kinetic energy relate to the scenarios you've mentioned:

1. An apple falling from a tree: Kinetic energy increases as it falls, while potential energy decreases.

2. A stationary ball on the ground: No kinetic energy (it's not moving), but it has potential energy due to its position above the ground.

3. A sleeping dog: The dog has potential energy due to its position above the ground, but it's not in motion, so there's no significant kinetic energy.

4. A boy running across the street: The boy has both kinetic and potential energy. His motion represents kinetic energy, and his position above the ground while running represents potential energy.

5. A car traveling on the road: The car has both kinetic energy (due to its motion) and potential energy (due to its position above the road).

6. A stretched rubber band: The stretched rubber band has potential energy stored in its stretched configuration.

7. A basketball being thrown: The basketball has both kinetic energy (while it's in motion) and potential energy (when it's at the highest point of its trajectory).

8. A girl biking at the park: Similar to the boy running, the girl on the bike has both kinetic and potential energy.

9. A leaf lying on the ground: The leaf has potential energy due to its position above the ground, but it has little to no kinetic energy unless it's moving in the wind.

10. A planet revolving around a star: The planet has both kinetic energy (due to its orbital motion) and potential energy (related to its position within the gravitational field of the star).

In general, potential energy is associated with an object's position or state, while kinetic energy is associated with its motion.

The period of an ocean wave is 4 seconds. What is the waves frequency?

Answers

Frequency= 1/period
Frequency=1/4
Frequency= 0.25Hz
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