How many valence electrons, electrons, protons, and neutrons does silicon have?

Why are jovian planets so much larger than terrestrial planets?

Calculate the specific heat of a metal. in J/kg. K, from the following data. A container made of the metal has a mass of 3.6 kg and contains 16.0 kg of water, a 1.8 kg of the metal initially at a temperature of 171.0 °C is dropped into the water.

Serena Williams can serve a tennis ball with 750 Newtons of force. The ball and racquet are in contact for 0.003 seconds. What is the impulse exerted on the tennis ball?

If the speed of a particle triples, by what factor does its kinetic energy increase?

Which statements about tsunamis are true? They can occur only in water. They can occur in water and on land. We can predict them. Underwater landslides can cause them. Dam failures can cause them.

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?