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At a college homecoming 18 students lifted a sports car. Each student exerted 400N of upward force on the car.
a) What is the mass of the car in kg?
b) What is its weight in lbs?
a 4 m string is held fixed at both ends. when driven by 108 Hzsource, the string vibrates in 4 distinct segments. What is the natural fundamental frequency of the string
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 5.0 m/s. What is the speed in the third segment
What is the repulsive force among two pith balls that are 12.0 cm apart and have equal charges of -26.0 nC?
To listen to a radio station, a certain home receiver must pick up a signal of at least 1.0X10^-10 W.If the radio waves have a frequency of 93MHz, how many photons must the receiver absorb per second to get the station?
As in the previous problem (43), a solid block is suspended from a spring scale. If the reading on the scale when the block is completely immersed in water is 25.0 N, what are the block's volume and density
The force has magnitude 2.0 N and is directed at a counterclockwise angle of 100" from the positive direction of the x axis. How much work is done by the force on the coin during the displacement?
A loaded penguin sled weighing 88 N rests on a plane inclined at angle ? = 18° to the horizontal (see the figure). Between the sled and the plane, What is the minimum magnitude of the force
Estimate the initial speed of that car assuming a level road.What would be the equilibrium temperature when a 252 block of copper at 275 is placed in a 136 aluminum calorimeter cup containing 807 of water at 14.90.
Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.8 seconds, then what is the acceleration and what is the distance that the sled travels?
the radii of curvature of the surfaces of a thin converging meniscus lens are r1 12.0 cm and r2 28.0 cm. the index
The outfielder throws a baseball with an initial speed of 10 m/s. An infielder catches the ball at the level 1 m lower, what work is done by air resistance
A tandem (two-person) bicycle team must overcome a force of 155 N to maintain a speed of 9.10 m/s. Find the power required per rider
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