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A factory worker pushes a 30 kg crate a distance of 4.5 meters along a level floor at constant velocity by pushing it downward at an angle of 30 degrees below the horizontal. The coefficient of kine
if your pull horizontally on a crate with force of 200n, it slides across the floor in dynamic equilibrium. how much friction is acting on the crate?
A fish in a flat-sided aquarium sees a can of fish food on thecounter. To the fish's eye, the can looks to be 30 cm outside theaquarium. What is the actual distance between the can and the aquarium
A 75m long train begins uniform acceleration from rest. What will be the speed of the last car as it passes the railroad worker?
A 0.174 kg softball is pitched horizontally at 26 m/s. the ball moves in the opposite direction at 38 m/s after it is hit by the bat. What is the change in momentum of the ball?
A 20.0 m long string has a mass of 0.010kg. A 2.0 m segment of the string is fixed at both ends and when a tension of 20 N is applied to the string, three loops are produced. What is the frequency
The "work function", or the minimum energy needed to eject an electron from the metal, can be expressed in several different ways. As stated on the applet page, sodium has a work function of 2.75 eV
A shopper pushes a cart 21 m south down one aisle and then turns 90.0° west and moves 28 m. What is the largest possible displacement of the shopper?
A 43.0-kg child swings in a swing supported by two chains, each 3.02 m long. The tension in each chain at the lowest point is 344 N. Find the child's speed at the lowest point.
If the conductor is copper with a free charge density of 8.0 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable?
The speed of sound on a winter day is 335 m/s. What is the temperature in Fahrenheit?
A 1.10 m long straight wire section has a resistance R = 34.0 ohm and is connected, with conducting wire of negligible resistance, to a 6.00 V battery. The wire is located in a uniform magnetic fiel
The radar antenna is pointing upward at an angle of 62.3° from the ground. Find the x and y components (in km) of the position vector of the satellite, relative to the antenna.
Sam, whose mass is 69.0 kg, takes off down a 48.0 m high, 10.0 degree slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 43.0 m/s. What is the coefficient
The time constant of an RC circuit is 5.5 s. How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge?
It takes 40 J to push a large box 4 m across a floor. Assuming the push is in the same direction as the move, what is the magnitude of the force on the box?
What will be the effect of deleting the Sxl gene in a newly fertilized Drosophila embryo?
How fast (in ) must a centrifuge rotate if a particle 8.50 from the axis of rotation is to experience an acceleration of 125,000 's?
Consider -blindness in humans is an X-linked recessive trait. Approximately10% of the men in a particular population are color-blind.
Furthermore, explain any differences in kinetic energy and gravitation potential energy among these balls when they hit the ground.
It is 155 cm from your eyes to your toes. You're standing 198 cm in front of a tall mirror. How far is it from your eyes to the image of your toes?
The current in a solenoid with 22 turns per centimeter is 0.50 A. The solenoid has a radius of 1.5 cm. A long, straight wire runs along the axis of the solenoid, carrying a current of 27 A. Find the
A copper-bottomed kettle, its bottom 24 cm in diameter and 3.0 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 W. What is t
A typical 100 lightbulb produces 4.0 of visible light. (The other 96 are dissipated as heat and infrared radiation.) What is the light intensity on a wall 1.7 away from the lightbulb?
If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system?