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At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find
(a) the time when the balls collide and
(b) the height at which they collide. Take g = 10 m/s^2
A defibrillator consists of a 15.3-µF capacitor that is charged to 8.4 kV. What is the average power delivered to the tissues?
A positive charge of q1 is located 4.59 m to the left of a negative charge q2. The charges have different magnitudes. How far to the left of the negative charge is one spot
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.11 m2 and whose thickness is 8 mm. Treat the wall as a slab of the insulating material Styrofoam whose area and thickness are 15 m2 and 0.10 ..
A steel aircraft carrier is 385 m long when moving through the icy North Atlantic at a temperature of 1.65°C. By how much does the carrier lengthen whereas it is travelling in the warm Mediterranean Sea at the temperature of 23.30°C.
A piano tuner plays an out of tune A note on his piano and then strikes his 440 Hz tuning fork. What was the frequency of the note before he loosened the string
A 1.25 Kohm and a 8.10 Kohm resistor are connected in parallel, what is the maximum voltage that can be applied across the whole network
Assume the freezer operates for 5 hours each day, how much power does it require while operating
A certain string just breaks while it is under 25 N of tension. A boy uses this string to whirl a 0.75-kg stone in a horizontal circle of radius 2.00 m. The boy continuously increases the speed of the stone. At around what speed would the string b..
Suppose both skaters are initially moving v, but one has mass m and the other 2m. What point do they rotate about after they meet? What is the linear velocity of this point? What is the angular velocity of the system
What are the first, second, and third frequencies audible from a 20cm long organ pipe when (1) only one end is open and when (2) both ends are open. The speed of sound through the air inside the organ pipe is 343 m/s. (Hint: if a harmonic does not..
A pipeline of 0.2m in diameter is flowing with water and ends in a constricted pipe of 0.1m diameter. find the velocity and the flow rate in the constricted section
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
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