A copper bar of length h and electric resistance r slides with negligible friction on metal rails that have negligible electric resistance (see figure below. the rails are connected on the right with a wire of negligible electric resistance

A pendulum has maximum velocity

9. A force does 50) of work on an object at rest with a mass of 4 kg. Which of the following is the final velocity of the object? 25 m/s 5 m/s 3.5 m/s

54) Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this? A) The magnetic pull of the Sun holds Neptune in its orbit.

The light from the Sun heats a metal surface

What did Ernest Rutherford expect to happen when he aimed a beam of particles at a thin gold foil?

What is the fundamental unit for measuring mass in the metric system?

Why are some craters on the moon bigger than others

What object oriented feature can we use to have a single test program, with one set of method calls in which the user can decide which bag implementation (array - or link-based) needs testing?

What might motivate someone to study forensics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. If r = 17.