Homework Statement
You are the captain of a submarine that is on a secret mission deep inside enemy waters. Suddenly your ship is “pinged” by another sub. You are able to determine that the ping comes from the North, has an intensity level of 86.4 dB, and has a frequency of 7270 Hz. You know...
Homework Statement
Your homemade submarine has a circular hole with a diameter of 14 cm in its side. You decide to plug the hole by taping over it with watertight duct tape. This works pretty well while you are exploring the ocean at shallow depths, but you find that as soon as you reach a...
Homework Statement
Answer both of the questions below using the following information: A lead weight is fastened on top of a large piece of Styrofoam that floats in a container of water. Because of the weight of the lead, the water line is flush with the top surface of the Styrofoam. If the...
Homework Statement
You are sitting in your room listening to music on your stereo. The music you are listening to is verystrange, consisting only a steady pure tone with a frequency of 740 Hz. The music is playedthrough two speakers, which are perfectly synchronized. You are sitting exactly...
Homework Statement
A pressurized canister of air is punctured and then dropped into the ocean where it quickly sinks. The pressure of the air inside the canister is two times greater than atmospheric pressure. Describe what will happen to the canister as it sinks. In particular, will the air...
Homework Statement
A 0.620-kg cart is moving down an air track with a speed of 2.33 m/s when it collides with a spring. The spring is initially at its equilibrium position, but the cart compresses the spring. It takes 0.0780s after the cart hits the spring for the cart to come to a stop. The...
Homework Statement
A 6.3-m long plank is supported by two concrete blocks, one that is placed 2 m from the left end of the plank and another that is placed 1.2 m from the right end. The mass of the plank is 44.5 kg.
(a) Find the normal force from each of the concrete blocks on the plank...
Homework Statement
A 43kg sign hangs by a thin wire slightly off center on a 2.2m long, thin rod. Each end of the rod is supported by a thin wire. the mass of the rod is 18.3kg
1. Determine the tension in each of the 2 wires that support the rod.
2. How far off-center is the wire...