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If the wire, which is fixed at both ends, vibrates at its fundamental frequency, the sound wave it generates excites the second vibrational mode of the tube of air. What is the tension in the wire?
An object in equilibrium has three forces exerted on it. A 18-N force acts at 90°, and a 62-N force acts at 61°. What is the magnitude and direction of the third force?
An office window has dimensions 3.4m by 2.1m. As a result of the passage of a storm, the outside air pressure drops to 0.96atm, but inside the pressure is held at 1.0atm. What net force pushes out o
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. By how much does the rocket clear the top of the wall?
A major-league pitcher can throw a baseball in excess of 40.8 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 17.4 m away from th
Suppose that two balls of mass 2.5 x 10^-4 kg each carry equal charges and are suspended by identical threads of length 13 cm anchored 24cm apart. If each thread makes and angle of 20 degrees with t
An ocean liner leaves New York City and travels 16.0° north of east for 245 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship'
A solid sphere with radius 0.050m and a mass of 3.0kg has a rod through its center. a net torque of 6.0*10^-4 Nm is used to spin the sphere about the rod. what is the sphere's angular acceleation?
An Angry Basketball player throws the ball straight down to the floor. If the ball bounces straight up and returns to the floor 2.5 seconds after first striking it what was the balls greatest height
A car traveling 85 km/hr strikes a tree. the front end of the car compresses and the driver comes to a rest after traveling 0.80m. What was the average acceleration of the driver during the collisio
An 8.1g bullet is fired with a velocity of 109m/s into a 98g block of wood at rest on a frictionless surface. The bullet lodges in the block and they slide off together. What is the final velocity o
A computer disk rotates at a constant angular speed of 34.1rad/s while being read. when searching for a file, the disk spins for 0.892s. a) what is the angular displacement of the disk during this t
The law of conservation of momentum applies to a collision between two bodies if: a. they exert equal and opposite forces on each other. b. they exert forces on each other respectively proportional to
Additional air is admitted from the supply line, causing the piston to rise another 20mm. What is the pressure inside the cylinder at this point?
A ball with a mass of 12g moving at +15.0m/s collides with a second ball of mass 36g moving at +5.0m/s. After the collision, the 12g ball moves at +6.0m/s. What is the change in momentum of the 36g
You observed that if you apply a perpendicular force of 5.5N at a distance of 24.0cm from the axis of rotation, you ca accelerate the object from rest to 3.0 rev/s in just 1.0s. What is the moment o
A person is standing on the roof of a tall building. She throws a ball from the top of the building in such a way that when the ball passes a window cleaner who is 2.0m from the top, it is falling
A person exerts a force of 28N on the end of a door 84cm wide. What is the magnitude of the torque if the force is exerted... a) Perpendicular to the door?
The kid twirls it just fast enough to keep it moving in a complete circle, results in a centripetal acceleration of 5.00 g at the lowest point. Find the speed of the yoyo at the highest point, lowes
As the contents of the container come into thermal equilibrium with the surroundings, the liquid helium vaporizes and turns into gas. If the temperature of the laboratory is 21.2°C, what is the
(a) What is the net electric force on the flea? (b) One of the charges is removed. Find the magnitude of the new net electric force on the flea.
Two balls of radius 2.00 mm have a separation between their centers of 5.33 cm. The same electric charge is placed on both balls so that there is a repulsive force between them of 3.10 N. Assume tha
An 80.0-N box is pulled 20.0 m up a 30 degree incline by an applied force of 100 N that points upwards, parallel to the incline. If the coefficient of kinetic friction between box and incline is 0.2
A rabbit runs in a straight line with a velocity of +1.3 m/s for a period of time, rests for 12 s, and then runs again along the same line at +0.54 m/s for an unknown amount of time. The rabbit trav
After a reaction time 0.300 s the policeman begins to pursue the speeder with an acceleration of 4.00 m/s^2. Including the reaction time, how long does it take for the police car to catch up with th