How is power defined

Use the equation d = m/v [stack fraction), where d = density, m = mass, and v = volume. If a rock as a density of 9 g/cm and a volume of 6 cm?, what is its mass?

Which statements accurately describe Dmitri Mendeleev's contributions to the development of the periodic table? Check all that apply. Mendeleev wrote the first modern chemistry textbook.

If total (PE + KE) is considered

What is the amount of effort required to lift up 600N load by using a lever of one meter length whose fulcrum is 20cm far from load? Efficiency=75%

What was the key breakthrough in the interpretation of quasar spectra?

A grocery shopper tosses a (n) 9.1 kg bag of rice into a stationary 19.3 kg grocery cart. The bag hits the cart with a horizontal speed of 6.6 m/s toward the front of the cart. What is the final speed of the cart and bag? Answer in units of m/s.

Where do most metamorphic rocks processes take place?

A 13,500 kg railroad freight car travels on a level track at a speed of 4.5 m/s. It collided and coupled with a 25,000 kg second car, initially at rest and with brakes released. What is the speed of the two cars after collision

What type of waves move energy forward, but the source makes up and down

Why do helium balloons float? Talk about density of atoms and compare to elements in the air.