What is the force that can cause two pieces of iron to attract each other?

A car traveling at 45 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is it's acceleration

According to the Big Bang theory, when the universe first formed, the temperature was extremely hot. As it began to cool, protons and neutrons began to form and come together. Which would be the first element created directly after the Big Bang?

What does Tabula Rasa mean and who first said it?

What is the rate at which work is done in lifting a 35 kg object vertically at a constant speed of 5 m/s? 1 1700 W 2 340 W 3 180 W 4 7.0 W

A stretched string of length L is observed to vibrate in seven equal segments when driven by a 686-Hz oscillator. What oscillator frequency will set up a standing wave so that the string vibrates in two segments?

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.

Metals are good thermal conductors - that is, when there is a temperature difference across their ends, they transfer energy very efficiently from the higher temperature end to the lower temperature end.

Some stars are so far away that their light hasn't reached Earth yet. A million years in the future, will the sources of light we see when we look up at night be the same? Why or Why not?

A sound wave travels through water. What best describes the direction of the water particles?