How much thermal energy is required to raise the temperature of a 1.0 kg k g piece of copper pipe by 20 ∘C ∘ C?

Explain sound waves. sources of sound waves and the experiment to demonstrate sound waves

What is the difference between a seismograph and a seismogram

Which factors are involved in earthquakes formation (multiple choice) A. rocks breaking B, stress decreases C, faults that remain stationary D, movement below surface Which statement describes the Mercalli scale?

Simon is riding a bike at 12 km/h away from his friend Kesha. He throws a ball at 5 km/h back to Keesha who is standing still on a sidewalk. How fast you would Kesha say the ball is traveling?

A small ball of mass m is aligned above a larger ball of mass M = 0.63kg (with a slight separation) and the two are dropped simultaneously from a height of 1.8m.

Which best describes how magnesium (mg) and oxygen (o) bond? they form an ionic bond by exchanging two electrons. they form an ionic bond by exchanging three electrons. they form a covalent bond by sharing one electron.

The coefficient of linear expansion of steel is 12 * 10-6 k-1. what is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 k from winter to summer? a. 1.2 cm b. 1.8 cm c. 1.4 cm d. 2.0 cm e. 1.6 cm

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. Calculate the energy.

Three ideal polarizing filters are stacked, with the polarizing axis of the second and third filters at 21 degrees and 61 degrees, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 60.

What does an electric current produce