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Assume the mass hanger is about 5g. How much mass will you need to add to the mass hanger in order to get a total single mass hanger system equal to 150 grams?
To store the energy produced in 1.0 hour by a 140 electric-power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir?
A Ford Mustang can accelerate from 0 to 60 in a time of 5.4 . A Mini Cooper isn't capable of such a rapid start, but it can turn in a very small circle 35 in diameter. How fast would you need to dri
You have a mass of 98 kg and are on a 55-degree slope hanging on to a cord with a breaking strength of 154 newtons. What must be the coefficient of static friction to 2 decimal places between you a
The disk will slide off the turntable if it is located at a radius larger than 18 cm from the axis of rotation. What is the coefficient of static friction?
How much time does she have to run the last 1750 m? (b) What should be her average speed over the last 1750 m in order to finish with an overall average speed of 3.85 m/s?
A rifle with a barrel length of 63 cm fires a 12 g bullet with a horizontal speed of 450 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm.
A pendulum of length 130 cm swings with an amplitude of 2.3 cm. Its mechanical energy is 5.2 mJ. What is the mechanical energy of the same pendulum when it swings with an amplitude of 4.4 cm? Answe
A solid piece of copper and a solid piece of aluminum have the same mass. If the density of copper is 8.9 grams/cm3 and the denity of aluminum is 2.7 grams/cm3,
A 70-g ball collides elastically with a 320-g ball that is at rest. If the 70-g ball was traveling in the positive x-direction at 5.75 m/s before the collision, what are the velocities of the two b
At what angle from vertical must she lean? Since the radius of the curve is much greater than the height of the passenger, neglect torques. 1 mile = 5,280 ft.
Pin joints and the masses of the bars are small compared with the mass of a 1360 kg car at the center. Calculate the force of tension or compression in each structural component.
What is the maximum reaction time allowed if the ranger is to avoid hitting the deer?
Find the shear strain that results if a force of magnitude 1.20×106 is applied to the top square face of the plate, parallel to the side.
A rifle with a barrel length of 55 cm fires a 12 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 11 cm. How long does it take the bulle
You measure the sound intensity as 1.47×10^-7 W/m2. Another student is 4.79 m away from the talkers. What sound intensity does the other student measure?
150 grams of boiling water (temperature 100 C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 850 grams and initial temperature 22 C (the heat capacity of aluminum is 0.9
The time constant of an RC circuit is 6.93s. How much time t is required for the capacitor(uncharged initially) to gain one-half of its full equilibrium charge?
An athlete at the gym holds a 5.23 kg steel ball in his hand. His arm is 71.6 cm long and has a mass of 6.74 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight
The skater farthest out has a mass of 80.0 kg and is 6.35 m from the pivot. He is skating at a speed of 7.60 m/s. Determine the magnitude of the centripetal force that acts on him.
The cup with water, do you see more of the penny, less of the penny or the same amount as the penny as you did without the water? Explain your answer.
Black Holes are suspected when a visible star is being noticeably pulled by an invisible partner that is more than 3 times as massive as the Sun. A red giant star is accelerated in a linear directi
If you were given a flat piece of plastic from a hit and run, write down a procedure to figure out what type of car was involved in the hit and run.
The container of oil and the air bubble are at 20° C where the density of air is 1.20 kg/m3. What is its terminal velocity? Answer given in cm/s.
A ball of mass 7 kg is thrown straight up in the earth's gravitational field with an initial speed v0 = 10 m/s. How do you find the speed of the ball at a height h=1.9m?