Why is it impossible to build a machine that produces more energy than it uses?

24-gauge copper wire has a diameter of 0.51 mm. The speaker is located exactly 4.27 m away from the amplifier.

Calculate the density of a solid cube that measures 4.53 cm on each side and has a mass of 519 g. Answer in units of g/cm3

There is no relationship between the overtone series/harmonic series and the patterns established on a vibrating Chladni plate.

What are some climate facts

How many neutrons does element X have if its atomic number is 39 and its mass number is 79?

A 1.0 kg ball is thrown into the air with an initial velocity of 30 m/s. How much kinetic energy does the ball have?

Have scientists discovered a fifth fundamental force of nature?

To study the properties of various particles, you can accelerate the particles with electric flelds. A positron is a particle with the same mass as an electron but the opposite charge (+e). Express your answer in vector form.

A lawnmower engine running for 20 minutes does 4560000 j of work. What is the power output of the engine

Which of the following is a conductor for electricity? Question options: wood wool water rubber tire