Why do sunspots appear darker than their surroundings?

Which interaction of sound waves causes beats? (Apex) A. Interference B. Reflection C. Diffraction D. Refraction

What event immediately precedes the nerve firing an action potential?

Two horizontal forces, 225N and 165N, are exerted on s canoe in the same direction. Find the net horizontal foce

3 m/s north is an example of a?

Mason lifts a box off the ground and places it in a car that is 0.50 meters high. If he applies a force of 80 newtons to lift this suitcase, what is the work done? A. B. O joules 4.0 joules C. 4.0 x 102 joules D. 4.0 * 102 joules

4. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.

An LC circuit has a 6.00 mH inductor. The current has its maximum value of 0.570 A at t = 0s. A short time later the capacitor reaches its maximum potential difference of 66.0 V. What is the value of the capacitance?

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.