2. A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 m. What

is the speed of sound in steel?

If T, = 40 N, find T, and the mass of the weight (W).

When will the next solar eclipse happen

A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How would the period of the pendulum change if the supporting chain were to break, putting the elevator into freefall?

If we mechanically squeeze a gas into a smaller volume, what happens to the pressure and temperature? (A) The pressure and temperature both increase, but we can't predict how much each one will change.

Inverse beta decay, the subatomic interaction by which an electron and a proton are "crushed" into a neutron, the process in which the recoil, on a massive scale of an entire stellar nucleus, pushes out the outer layers of the star in the

A spaceship takes off vertically from rest with an acceleration of 30.0 m/s 2. What magnitude of force F is exerted on a 53.0 kg astronaut during takeoff?

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom neutrally charged? Explain your answer.

A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. Air resistance is negligible. A.

What does the model below represent? 200 + 02 → 2002

Efficiency of a standard 60 W lightbulb