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A 145 g baseball is dropped from a tree 14.0 m above the ground.
(a) If it actually hits the ground with a speed of 7.80 m/s, what is the magnitude of the average force of air resistance exerted on it?
An exhaust tube from a steam generator is submerged in a large container of cool water. what is the change of entropy (in J/deg) of the steam
An adult exerts a horizontal force on a sewing that is suspended by a rope of length L, holding it at an angle x with the vertical. The child in the swing has a weight W and dimensions that are negligible compared to L.
The partition is now removed, and the water expands to fill the entire tank. Find out the final temperature of the water and the volume of the tank for a final pressure of 10 kPa.
A 25.0-mW laser beam of diameter 2.00 mm is reflected at normal incidence by a perfectly reflecting mirror
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 21 m. obtain the magnitude of the acceleration of the car
Charge q1 = 5.47*10^-8 is placed at the origin. Charges q2 =-1.45*10^-8 C and q3 = 1.95*10^-8 C, Determine the direction of the net electrostatic force on charge q3
You have three resistors with values 3.7?, 2.8?, 5.1?, and a battery of 3.6V. You begin by connecting the three resistors in parallel, What is the magnitude of the current in the 2.8 resistor
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
The objective lens in a microscope with a 21.0 cm long tube has a magnification of -50.0 and the eyepiece has a magnification of 15.0. What is the focal length of the objective
A 4 cm diameter loop with resistance 0.18 Omega surrounds a 2 cm diameter solenoid. The solenoid is 15 cm long, has 100 turns, and carries the current shown in the graph. A positive current is cw when seen from the left.
Two sinusoidal waves of the same period, with amplitudes of 5.5 and 7.5 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 12.760 mm. The phase constant of the 5.5 mm wave is 0. What is th..
A trolley that moves along a horizontal beam is acted upon by two forces as shown. What is the corresponding magnitude of the resultant
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