Answer:
velocity equals distance divided by time and the unit you use after you get the answer is m/s
Explanation:
Answer:
0.6048 kg of coal
Explanation:
Mass energy input = mass energy output/efficiency
Mass energy output = 30 GJ/ton= 3×10^10 J/1000 kg = 3×10^7 J/kg
Efficiency = 30% = 0.3
Mass energy input = 3×10^7/0.3 = 1×10^8 J
Mass of coal to be burned = power×time/mass energy input
Power = 100 W
Time = 1 week = 604,800 s
Mass of coal to be burned = 100×604,800/1×10^8 = 0.6048 kg
Answer:
A
Explanation:
the balancing is correct in the first one
Answer:
470 N.
Explanation:
Using equations of motion:
S = vi*t + 1/2*(a*(t^2))
Given:
S = 0.65 m
t = 1.5 s
vi = 0 m/s
0.65 = 1/2 * (a * (1.5)^2)
a = 1.3/2.25
= 0.578 m/s^2
Force = mass * acceleration due to gravity
= 92 * 0.578
= 53.16 N
Total force = 420 + 53.16
= 473.16 N
= 470 N.
