A1.88-m (6 ft 2 in.) man has a mass of 81 kg, a body surface area of 1.8 m2, and a skin temperature of 35.2 ∘c. normally, 80% of the food calories he consumes go to heat; the rest goes to mechanical energy. his emissivity e is 1 because his body radiates almost entirely nonvisible infrared energy, which is not affected by skin pigment. (careful! his body at 35.2 ∘c radiates into the environment at 20.0 ∘c, but the environment also radiates back into his body. the net rate of radiation is pnet=pbody−penvironment.) to keep his body’s temperature constant, how many food calories should he eat per day if he is in a room at 20.0 ∘c and he loses heat only through radiation?

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

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explanation:

your answer is, orbit around the nucleus

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s