We know the mechanical energy Ina system is 30 J, and we know the potential energy is 20J. What is the kinetic energy?

High energy waves have Choose one answer. a. long wavelengths and low frequencies. b. long wavelengths and high frequencies. c. short wavelengths and low frequencies. d. short wavelengths and high frequencies

A grinding wheel with a moment of inertia of 2 kg-m2 has a 2.50 N-m torque applied to it. What is its final kinetic energy 10 seconds after starting from rest? 312 J 237 J 156 J 106 J

Diffraction patterns are due to: interference refraction dispersion scattering

Is work done if you carry a book across the room at a constant velocity?

Which of these is the easiest mineral identification property to use when you want to know whether you have pyrite or actual gold? a. heft b. luster c. streak d. magnetism

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

You are standing 100 meters from an object emitting a sound of constant intensity (loudness). You walk toward the source of sound until you are 20 meters from it. From your perspective, what has happened to the intensity of the sound?

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.)

How do credit cards use magnets to work?

Which of the following describes a physical change? A. Formation of a new substance caused by combining substances B. Water changing from liquid to gas through evaporation or boiling C. Formation of a new substance caused by application of heat