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A photographer in a helicopter ascending vertically at a constant rate of 12.5 m/s accidentally. How long will it take the camera to reach the ground?
Consider a gas at room temperature in a container that is being pumped using a plasma discharge. Assume that there is a population inversion between states 1 and 2 (N2>N1) and the system is Dopp
Bonnie and Clyde are sliding a 303kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 379N of force while Bonnie pulls forward
Two towers have heights of 480 m and 595 m. If objects were dropped from the top of each, what would be the difference in the time it takes the objects to reach the ground?
Find the expression for the magnetic density B at a point a distance h above the centre of a rectangular loop of wire b meter on one side and a meter on the other side.The loop carries a current of
Throughout this problem, positive torque is counterclockwise. Use 9.81 m/s^2 for the magnitude of the acceleration due to gravity. Find the tension in the first string.
If the curve were not banked, what would be the minimum coefficient of friction between tires and road that would keep traffic from skidding out of the turn when traveling at 79 km/h?
The coefficient of static friction is 0.32. If you apply the minimum force needed to get the refrigerator to move, what will the acceleration then be?
A block and a ball have the same mass and move with the same initial velocity across a floor and then encounter identical ramps. The block slides without friction and the ball rolls without slippin
What is the magnitude of the velocity at which the two players move together immediately after the collision? What is the direction of this velocity?
What is the tangential velocity of a satellite in a circular orbit 300km above the surface of the Earth? How long does the satellite take to complete one orbit? (i.e. find its period)
What is the magnitude of the acceleration as the elevator starts upward? What is the magnitude of the acceleration as the elevator brakes to a stop?
Calculate the Schwarzchild radius (expressed in kilometers) for a black hole that has the mass of Milky Way Galaxy (expressed in solar masses), and one that has the mass of the Universe
The coefficient of kinetic friction between the log and the ramp is 0.900, and the log has an acceleration of 0.800 m/s2. Find the tension in the rope.
If the period of oscillation does depend on the mass of the ring, how might this be incorporated into the empirical equation?
A 110g trick baseball is thrown at 75km/hr . It explodes in flight into two pieces, with a 46g piece continuing straight ahead at 95km/h. How much energy do the pieces gain in the explosion?
Draw a free-body diagram of a person of mass M in this ride after the floor of the cylinder has dropped away, assuming the person doesn't slip. (Please draw this, clearly, on the next page. Label th
Upward with a force of 490 N, and downward with a force of 228 N. What is the direction of the net external force on the crate (measured CCW from right, the positive x axis)?
Compare and contrast natural versus anthropogenic climate changes. Include specific examples of each. Take a position as to whether or not global warming is taking place. Provide three (3) lines of e
How much work is required to pull him 45 m up a 30° slope (assumed frictionless) at a constant speed of .3.5m/s? What power must a motor have to perform this task?
A solenoid is wound with N=471 turns on a form D=3.4 cm in diameter and L=82 cm long. The windings carry a current in the sense that is shown. The current produces a magnetic field, of magnitude 7.
One rechargeable battery of mass 15.0 g delivers to a CD player an average current of 18.0 mA. What is the efficiency of the battery as an energy storage device?
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after
Define the following terms giving examples wherever possible: a) Bernoulli's Principle and Boyle's Law;
Handle that is at an angle of 26° above the horizontal. If the normal force exerted on the suitcase is 180 N, what is the force F applied to the handle?