A girl drops a rock 30 meters and measures the time of the drop at 4.02 seconds. What is the value of the gravitational acceleration on her new planet?

The radius of a cone is increasing at a rate of 333 centimeters per second and the height of the cone is decreasing at a rate of 444 centimeters per second. At a certain instant, the radius is 888 centimeters and the height is 101010 centimeters.

A 27.5-g object moving to the right at 19.0 cm/s overtakes and collides elastically with a 11.5-g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision. (Take the positive direction to be to the right.

A scientist has a sample of uranium-238 (U-238) that is decaying to thorium-234 (Th-234). During the transmutation, a gamma ray is emitted from the nucleus. The thorium-234 daughter particle does not decay quickly enough to be detected.

In the secondary winding of a transformer, which color wire is grounded to earth? O Black Green Red White

Complete the following sentence: The operation of a hydraulic jack is an application of a) Archimedesâ principle. b) Bernoulli's principle. c) Pascal's principle. d) the continuity equation. e) irrotational flow.

How do mountins building and volcanos relate to plate motion at convergent boundaries

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.