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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?
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10-2 cm, mounted coaxially within a cylindrical anode with a radius of 0.5580 cm. The potential difference between the
Clyde pushes from behind with 445{rm N} of force while Bonnie pulls forward on a rope with 325{rm N} of force. What is the coefficient of friction of the safe against the floor?
Bonnie and Clyde are sliding 370 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 390 {rm N} of force while Bonnie pul
To better comprehend the magnitude of current extinctions, it will be necessary to?
A shotputter throws the shot with an initial speed of 15.9m/s at a 36.0 angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height o
A 66.0-{rm kg} person stands on a scale in an elevator.What does the scale read (in {rm N}) when the elevator is at rest? What does the scale read (in {rm N}) when the elevator is climbing at a cons
If the composition of the upper atmosphere were changed to permit a greater amount of terrestrial radiation to escape, what effect would this have on Earth's climate?
A stone hangs by a fine thread from the ceiling, and a section of the same thread dangles from the bottom of the stone. If a person gives a sharp pull on the dangling thread, where is the thread li