Answer:
The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.
Explanation:
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Answer:
10.0 zero, by Gauss' Law the symmetrical distribution will produce no internal electric fields
21.5 E = k Q / R^2 behaves as if all charge were at center
E = 9 E9 * 29.5 E-6 / .215^2 = 5.74E6 N/C
Answer: A wrecking ball can destroy a building because it is larger, and when it hits something, it exerts a lot of <u>kinetic energy.</u>
A yo-yo is too small and does not exert as much kinetic energy because of it's size.
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Answer:
Energy and matter are contained within a closed system.
Answer:
Explanation:
Given:
- initial velocity of projectile,
- angle of projection above horizontal,
height of the initial projection point above the ground,
<u>Vertical component of the velocity:</u>
<u>The time taken in course of going up:</u>
(at top the final velocity will be zero)
<u>In course of going up the maximum height reached form the initial point:</u>
(at top height the final velocity is zero. )
using eq. of motion,
where:
final vertical velocity while going up.=0
maximum height
<u>Now the total height to be descended:</u>
Now the time taken to fall the gross height in course of falling from the top:
<u>Now the total time the projectile spends in the air:</u>
<u>Now the horizontal component of the initial velocity:</u>
(it remains constant throughout the motion)
Therefore the horizontal distance covered in the total time;