50°C is equivalent to : (a) 90°F (b) 122°F (c) 82°F

Which trasformaron of energy takes place when a slingshot launches a stone?

Buses travel at 25 m/s then decelerate steadily. It comes to a complete stop in 40 second. What is its acceleration?

To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. he then pulls downward on the free end of the rope with a force of 371 n.

Describe how acceleration and velocity are related and specify if these are scalar and vector quantities

3 kg of saturated liquid water, contained in a rigid container at p = 1.5 bar, is heated by a 80 W heater.

If an ant were scaled up to the size of an elephant, the ant would be

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body