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A box rests on the back of a truck. The coefficient of static friction between box and bed of the truck is 0.250.
(a) When the truck accelerates forward, determine what force accelerates the box?
(b) Obtain the maximum acceleration the truck can have before the box slides.
A wave has angularfrequency 90 rad/s and wavelength1.80 m. Calculate the angular wave number
Two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 438 newtons (N) in a direction due west; the other applies a force of 402N in a direction due south.
An ocean fishing boat is drifting just above a school of tuna on afoggy day. Without warning, an engine backfire occurs on anotherboat 1.0 km away. How much time elapses before the backfire isheard (a) by the fish, and (b) by the fishermen?
A weather vane initially at rest has a moment of inertia of 0.103 kg · m2 about its axis of rotation, Find the angular velocity of the weather vane just after it is struck
Four moles of an ideal gas undergo a reversible isothermal expansion from volume V1 to volume V2 = 5V1 at temperature T = 400K. Find the entropy change of the gas
A 0.99-cm-diameter microscope objective has a focal length of 2.6 mm. It is used in visible light with a wavelength of 532 nm. What is the objective's resolving power if used in air
A 150. W lamp is placed into a 120. V AC outlet. What are the peak and rms currents and What is the resistance of the lamp
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the speed of the elevator just before striking the spring
A pendulum makes 24 oscillations in 33s. A) Find the period. Express your answer to two significant figures and include the appropriate units. B) Find the pendulum's length. Express your answer to two significant figures and include the appropriate u..
A diver running 2.5m/s dives out horizontally from the edge of a vertical cliff and 2.9s later reaches the water below. How far from its base did the diver hit the water
The depth of the potential well for free electrons in a metal can be correctly determined with observing that the photoelectric work function is the energy necessary to remove an electron at the top of the occupied states from the metal;
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