When energy changes from one form to another, some energy is always changed to A. sound B. heat C. electricity D. light.

14. The load across a 50.0-V battery consists of a series combination of two lamps with resistances of 125 12 Band 225 2. a. Find the total resistance of the circuit. b. Find the current in the circuit. c.

A wave of frequency f=50hz propagates at a speed v=100cm/s calculate its wavelength

A platinum sphere with radius 1.65 cm is totally immersed in mercury. find the weight of the sphere, the buoyant force acting on the sphere, and the sphere/'s apparent weight. the densities of platinum and mercury are 2.14 * 104 kg/m3 and 1.

You are on the roller blades on top of a small hill. Your potential energy is equal to 1,000.0 joules. The last time you checked your mass was 60.0 kilograms. What is your weight in newtons?

Benny wants to estimate the mean lifetime of Energizer batteries, with a confidence level of 97%, and with a margin of error not exceeding ±10 hours.

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer

When two frequencies are added together, the beat frequency and the average frequency are an octave apart?

When sunlight strikes oil on the surface of water, a variety of colors are observed. What is the best explanation for this observation? A) Oil reflects the light and the lens of our eyes break it into component colors.