Adisk with a c value of 1/2, a mass of 4 kg, and radius of 0.52 meters, rolls without slipping down an incline with has a length of 7 meters and angle of 30 degrees. at the top of the incline the disk is spinning at 23 rad/s. how fast is the disk moving (the center of mass) at the bottom of the incline in m/s?

What happens to the light rays when they hit the specimen?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative