Why are plate tectonics a theory?

A lamp is marked 240 V, 60 W. The lamp is working normally. Calculate the electrical energy converted in 10 minutes.

What is the acceleration of a boy on a skateboard if the net force on the boy is 15 N? The total mass of the boy and the skateboard is 58 kg.

A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound? A. The frequency increases and the wavelength decreases. B. The frequency decreases and the wavelength increases.

A hydraulic system for a dentist's chair is designed to be able to lift 3,112 newtons. the surface area over which this force is applied is 707 cm2. what force must be applied to the activator end of the system if the button has a surface area of 3.

What is the net worth of a car moving 30 miles per hour

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a

What is Nothing. (sorry i have been wondering this for a very long time)

What is the weight of a 15kg dog on earth?

Identify the scenario below as to whether they increase, decrease, or not change the frequency in which a string vibrates and thus change its pitch. Assume that no other changes are happening. 1. Tightening a string for greater tension 2.