A boy and his skateboard have a combined mass of 65KG what is the speed of the boy and skateboard if they have a momentum of 275 KG times M/s

Which is a hypothesis? A.) Clouds are observed in the sky. B.) You can relate the shape of a cloud to other objects, C). Why do clouds produce rain? D.) Clouds are made of water droplets.

A trebuchet wasa hurling machine builtto attackthe walls of a castle under siege. A large stone could be hurled against a wall to break apart the wall. The machine was not placed near the wall because then arrows could reach itfrom the castle wall.

To enter the main pool at an amusement part, a swimmer uses a water slide which has a vertical height of 2.89 m. find her speed at the bottom of the slide if she starts with an initial speed of 0.810 m/s.

Plutonium has a half life of 2.4 * 104 years. How long does it take for 99.0% of the plutonium to decay?

Den pushes a desk 400 cm across the floor. He exerts a force of 10 N for 8 s to move the desk. What is his power output? (Power: P = W/t)

What kind of error would result if you read the liquid volume where the liquid touches the wall of the cylinder rather than at the meniscus

A long, thin rod parallel to the y-axis is located at x=-1.0 cm and carries a uniform linear charge density of + 1.0 nc/m. a second long, thin rod parallel to the z-axis is located at x=+1.0 cm and carries a uniform linear charge density of - 1.

A meter is measured in?

Explain why you poured the water into water before you identify the smell?

The force you exert on machine is called the?