Copernicus preferred the heliocentric model.
A healthy young person hears all sound frequencies from 20 to 20,000 hertz. I think it also includes 15-18,000 waves, or cycles, per second.
Hope I helped :)
Answer:
Explanation:
Given data:
Earth mass
distance between earth and asteroid is
asteroid mass
speed of asteroid = 2 km/s
potential energy is
Kinetic energy
Final potential energy of asteroid is
from conservation of energy principle
solving for K_f
Answer: the man consumed 0.539598 Kilo-calories of food
Explanation:
Given the data in the question;
first we calculate the work required to raise the given weight at the given height;
ΔW = mgh = w'h = (0.87) × h
= ( 0.87 × 163) × (31/12)ft { 1 foot = 12 inch}
= 366.34 lb-ft
Now since 22% of all the potential energy stored in food is available for useful work;
ΔW = 0.22 × ΔPE
ΔPE = ΔW/0.22
we substitute
ΔPE = 366.34 / 0.22
= 1665.18 lb-ft
Now given that; 1 ft-lb = 0.000324048 Kilocalories
= 1665.18 × 0.000324048
= 0.539598 Kilo-calories
Therefore the man consumed 0.539598 Kilo-calories of food
I’d say <u>D. All of the above</u>, but I’m not particularly knowledgeable about this, so I could be wrong.