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A 13 g bullet traveling 235 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 179 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bulle
A 5.00-m-long, 480 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 74.0 kg construction worker stands at the far e
Two girders are made of the same material. Girder A is 5.5 times as long as girder B and has a cross-sectional area that is 8.9 times as great. What is the ratio of the mass density of girder A to t
A bicycle pump contains air at STP. What is the new pressure of the air in the chamber after the first stroke, assuming no temperature change?
Iron has a density of 7.87 g/cm3 and the mass of an iron atom is 8.20 x 10-26 Kg. If the atoms are spherical and tightly packed, what is the volume of an iron atom? (Your answer must have correct si
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 90.0 cm, what was the speed of the bullet at impact with the block?
A bubble having a diameter of 76 cm is released from a depth of 4.7 m from the bottom of a swimming pool. What will the diameter of the bubble be when it reaches the surface?
A 67-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.19. What would be the magnitude of the acceleration?
How many atoms of helium gas are required to fill a balloon to diameter 32 cm at 77?C and 1.271 atm? What is the average kinetic energy of each helium atom?
Block is tied to a string that is wrapped around the rim of a pulley of radius 7.5 . The block is released from rest. Assuming the pulley is a uniform disk with a mass of 0.31 , find the speed of t
A room has its walls aligned accurately with respect to north, south, east, and west. Find the fluxes through the north wall, the east wall, and the floor.
1.5 block is tied to a string that is wrapped around the rim of a pulley of radius 7.5 . The block is released from rest. Assuming the pulley is a uniform disk with a mass of 0.31 , find the speed
How fast is it moving at the top of its trajectory? Suppose it is fixed upward at 45 abouve the horizontal plane. How fast is it moving at the top of its curved trajectory? Explain.
Suppose the speakers are reconnected so that the 471 sounds they emit are exactly out of phase. At what positions are the intensity maximum and minimum now?
The glider is pushed in 8.2 cm and released. A student with a stopwatch finds that 14 oscillations take 17.0. What is the spring constant?
A heavy ball with a weight of 150 is hung from the ceiling of a lecture hall on a 4.0--long rope. The ball is pulled to one side and released to swing as a pendulum, reaching a speed of 5.6 as it pa
A NASA satellite has just observed an asteroid that is on a collision course with the Earth. With what speed will it hit the Earth's surface, neglecting friction with the atmosphere?
Given that the flea has a mass of 0.55 , and that two legs are used in a jump, estimate the maximum height a flea can attain by using the energy stored in the resilin. (Assume the resilin to be an i
A thin circular disk of charge density (sigma) and radius a rotates with angular velocity (omega) about an axis through its center in the plane of the disk. Describe the radiation field using the m
What is the direction of the net electric field at point = 0.190 on the y-axis?What is the magnitude of the net electric field at point = 0.584 on the y-axis?
A person who weighs 600 N steps onto a spring scale in the bathroom, and the spring compresses by 0.94 cm. What is the spring constant?
A ball with a 7.5 mass is attached to a 3.8 meter string. It is swung around in a circle one revolution is 2.7s. what is its speed ? what is it's centripetal acceleration?
A bullet of mass 5.00 g is fired horizontally into a wooden block of mass 1.26 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.160. The bullet
What is (a) the width and (b) the height of the central bright maximum of the diffraction pattern, measured between the two dark fringes on either side?
The coefficient of static friction between his hands and the book is 0.34. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?