A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?