The earth has biogeochemical cycles that recycle life materials and are essential to the

What are the two principal parts of all levers

If you were going to invent a new way to power your mobile phone, which type of electromagnetic wave would be most useful to investigate? A. Radio waves, because they are high energy and common. B. Gamma rays, because they are strong and safe. C.

A 0.4 kg object that stretches a spring 8.8 cm from its natural length when hanging at rest oscillates with an amplitude of 4.1 cm. Find the total energy of the system. The acceleration due to gravity is 9.81 m/s2. Answer in units of J.

How many nano-meters thick is a nickel

Renewable energy sources are best described as

A block of mass m=16.8 kg is sliding on a surface with initial velocity v=23.2 m/s. The block has a coefficient of kinetic friction μk = 0.426 with respect to the surface and is being pushed by a force of magnitude F=86.

Two children are pulling and pushing a 30.0 kg sled. The child pulling the sled is exerting a force of 12.0 N at a 45o angle. The child pushing the sled is exerting a horizontal a force of 8.00 N. There is a force of friction of 5.00 N.

Describe what a planetesimal is. Is it related to a protoplanet?

Describe the medium that electromagnetic waves use to travel

In your own words describe hot spot and the formation of the Hawaiian island