Answer:
1. realizing of arrow
2. kicking of ball
3. punching the punching bag
Answer:
(a) 112.5 V/m
(b) 0.01494 T
Explanation:
velocity, v = 4.5 km/s = 4500 m/s
magnetic field, B = 2.5 x 10^-2 T
mass, m = 6.64 x 10^-26 kg
charge, q = 1.6 x 10^-19 C = 1.6 x 10^-19 C
(a) The force due to the magnetic field is balanced by the force due to the electric field
q E = B q v
E = B v = 2.5 x 10^-2 x 4500 = 112.5 V/m
(b) radius, r = 12.5 cm
B' = 0.01494 T
I would guess anything that is black? black absorbs there most light energy. that's is why a black car in the sun will always be hotter inside than a white car.
Answer:
Force,
Explanation:
Given that,
The water in the plumbing in a house is at a gauge pressure of 250,000 Pa.
We need to find the force caused on the top of the tank inside a water heater if the area of the top is . Let F is the force. We know that the force acting per unit area is called pressure exerted. It is given by :
So, the force caused on the top of the tank inside a water heater is . Hence, this is the required solution.
I'd say (D) as in water waves or light
(A) is wrong because EM waves don't need a medium.
(B) is wrong because it says material which should act as a medium as well.
(C) is wrong because it's way of the real meaning.