Ineed with science homework!
which of these is an example of work being done on an object?
select one:
a. holding a heavy piece of wood at a construction site
b. trying to push a car that doesn't move out of deep snow
c. holding a door shut on a windy day so it doesn't blow open
d. pushing a child on a swing

What is the momentum of a 2 kg object moving at 15 meters per second

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

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.