A stream begins at an elevation of 1000 feet and flows a distance of 200 miles to the ocean. what is the average gradient?

How can we produce more power than an excavator?

Oxygen-18 is a naturally-occuring, stable isotope and is commonly used is scientific studies as a tracer. Using the periodic table, predict the number of electrons, neutrons, and protons in oxygen-18.

How many neutrons are needed to initiate the fission reaction shown?

Which is 20 miles per hour north an example of? A. acceleration B. Direction C. Speed D. Velocity

A wire is first bent into the shape of a triangle. each side of the triangle is 20cm long. then the wire is bent and shaped into a square. what is the length of a side of the square

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?