Answer:
(a)

(b)

(c) 
Explanation:
According to the Wein's displacement law

Where, T be the absolute temperature and b is the Wein's displacement constant.
b = 2.898 x 10^-3 m-K
(a) T = 37°C = 37 + 273 = 310 K



(b) T = 1500°C = 1500 + 273 = 1773 K



(c) T = 5800 K



Answer:
ball D will fall toward the ground at the same time as ball C
Explanation:
both balls experience the same downward (vertical) force of gravity as such they will both fall down at the same time, given that all other factors are equal.
although the ball were through with different forces,
those forces where in the horizontal direction but the force of gravity (downward force) will act on them equally to bring them down at the same time
Answer:
it means how fast the wave is traveling in which a 40 ms is as fast as a car traveling
Answer:
Explanation:
Given
masss of football player 
Velocity of football player 
mass of football 
velocity of football 
Final velocity will be given by applying conservation of linear momentum
After catching the ball Player and ball moves with same velocity




So, final velocity will be 