Answer:
Height of mirror will be 1 m for complete image of person
Explanation:
We have given distance of person from plane mirror d = 2 m
And height of person = 2 m
We have to find the height of plane mirror which given full image of person
Height of mirror will be equal to half of height of person
So height of mirror 
So height of mirror will be 1 m for complete image of person
Answer:
165.2762 m/sec
Explanation:
The initial mass of the rocket and the fuel
M₀ = 5.02e6 kg
The initial mass of the fuel
Mf₀ = 1.25e6 kg
The rate of fuel consumption
dm/dt = 370 kg/sec
The duration of the rocket burn
Δt = 450 sec
The rocket exhaust speed
Ve = 4900 m/sec
The thrust, T
T = Ve (dm/dt) = 1813000 kg m/sec²
The mass of the expended propellant, ΔM
ΔM = Δt (dm/dt) = 166500 kg
The rocket's mass after the burn
M₁ = M₀ − ΔM = 4853500 kg
The speed of the rocket after the burn
Δv = Ve ln(M₀/M₁) = 165.2762 m/sec
IT WOULD GROW BETTER ON MOIST BREAD BECAUSE IF IT IS DRIED IT IS HARDER FOR IT TO FORM AND IF IT IS MOIST IT WILL GET MOLD ON IT FASTER
Answer is the highest temperature, so D
Higher temperatures allow for sound to move faster, since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second. This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.
Neat little fact: This is also why in the winter when there is snow on the ground, it seems more peaceful and quite. The snow absorbs the sound waves and the temperature makes them not travel as fast, getting more quite as they go.
