Explanation:
Efficiency is the ratio of energy out to energy in.
e = Eout / Ein
0.52 = 800 J / Ein
Ein ≈ 1538 J
Round as needed.
Answer:
option C and D
Explanation:
When a stunt driver is rotating on the banked road the force which is responsible for the centripetal acceleration of the car is Frictional force and the Normal Force.
The Frictional force component of the banked road will protect the car from skidding.
And the normal force component will protect the car from toppling inward due to centripetal force acting on it.
Hence, the correct answer is option C and D
It mainly depends on the season of the year
Answer:
163 N
Explanation:
The density of copper is about 8.96. The ratio of the weight in water to the weight in air is about 1-1/ρ, so is about 0.8884.
0.8884 × 184 N ≈ 163 N
The submerged weight is about 163 N.
