If the cross-section of a wire of fixed length is doubled, how does the resistance of that wire change? A. Halved. B. Doubled C. Unchanged. D. Quadrupled

A man lifts a 25.9 kg bucket from a well and does 5.92 kJ of work. The acceleration of gravity is 9.8 m/s^2. How deep is the well? Assume that the speed of the bucket remains constant as it is lifted. Answer in units of m.

You leave the doctor's office after your annual checkup and recall that you weighed 688 N in her office. You then get into an elevator that, conveniently, has a scale.

Conversion of the sun's energy from fossil fuels into electricity does not involve: a. coal c. steam b. wind d. turbines

A ski lift has a one-way length of 1 km and a vertical rise of200m. The chairs are spaced 20 m apart, and each chair can seatthree people. The lift is operating at a steady spedd of 10 km/h.

7) Cosa rappresenta la seguente formula? Definiscila. I=Q/t

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?

A batter hits a baseball with a bat. The bat exerts a force on the ball. Does the ball exert a force on the bat?

In a nuclear power plant, the temperature of the water in the reactor is above 100°C because of what?

Determine the total mechanical energy of a 250 g baseball if it has a velocity of 30 m/s when it leaves the pitcher's hand 1.2m above the ground.