3questions, 10 points a question, will give brainliest.
question 1: in which of these situati...
Physics, 22.01.2020 20:31 nestergurl101
3questions, 10 points a question, will give brainliest.
question 1: in which of these situations, is mechanical energy being conserved? (neglect, air resistance, friction and breaking) check all that apply.
question 1 options:
child on a swing
pendulum
bow and arrow
roller coaster
question 2: as an object falls to the ground, its potential energy is being converted to kinetic energy.
question 2 options:
true
false
question 3: calculate the potential energy stored in a 10 kg block, 5 meters above the ground.
question 3 options:
490 j
50 j
490 n
50 n
Answers: 1
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Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n
Answers: 2
Physics, 22.06.2019 12:00
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Physics, 22.06.2019 21:00
During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver
Answers: 2
Physics, 22.06.2019 23:40
Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.
Answers: 3
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