Why is the crust less dense than the core

Which of the following is the discharge build up of excess electrical charge? electrical charge current electricity electron static electricity

What is the mass of a volleyball that has 260 J of kinetic energy and travels at a velocity of 15m/s

How much heat is needed to raise the temperature of 5g of water by 18°C

A stretched string is 1.91 m long and has a mass of 19.3 g. When the string is oscillated at 440 Hz, which is the frequency of the standard A pitch that orchestras tune to, transverse waves with a wavelength of 17.1 cm travel along the string.

In the water cycle what state of matter is rain

What happened to the test charge when brought near another positive charge, and how did you use this fact to score a goal only using positive charges? Explain for both the practice charge and more difficult levels.

You get up in the morning, get dressed, eat breakfast, walk to the bus stop, and ride to school. List three different energy transformations that have taken place.

If you lived by the sea, what effect of the moon would you see? Describe the effect.

20g of ice at 0℃ is mixed with 20g of hot water at 60℃. Then amount of water in mixture in equilibrium condition will be

A person cannot see clearly objects closer than 2.00 m from her/him. What is the refractive power (in diopters) of the correction lenses that will allow her/him to clearly see objects located 30.