Answer:
Part a)
Part b)
Part c)
Explanation:
As we know that 5000 kg African elephant requires 70,000 Cal for basic needs per day
so we will have
so we have energy required per kg
Part a)
now we know that per kg the energy required will be same
so we have mass of the human is 68 kg
so energy required per day is given as
Part b)
Resting power is the rate of energy in Joule required per sec
so it is given as
Part c)
resting power given in the book is
so this is less than the power given
i sorry i thought of geocentric as something else it appears that the earth was the center
Explanation:
According to formula
g = GM/R^2
when mass is halved the value of g becomes half but when radius is halved the value of g increases 4 times.
As a result of both value of g becomes twice.
When firing straight up:
v^2 = u^2 - 2gh, where v = final velocity = 0, u = initial velocity, g = gravitational acceleration, h = maximum height attained.
Then,
0 = u^2 - 2gh
u = Sqrt (2gh) ---- (1)
When firing at 45°,
Initial velocity, U = u Sin 45 = Sqrt (2gh)·Sin 45
Maximum height, H = U^2*(Sin Ф)^2/2g
substituting;
H = [Sqrt (2gh)·Sin 45]^2*(Sin 45)^2]/2g
H = [2gh*(Sin 45)^2*(Sin 45)^2]/2g
H = [h*(Sin 45)^4] = h/4
Therefore, maximum height when the gun fires at 45° is a quarter of maximum height when the gun fires vertically up.