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1. An Aluminum block weighs 12N in air and 8N in water. What is the mass of the block?
2. How much energy would it take to transform 76g of water to steam at 125C?
3. A cube of wood of density 0.78g/cm3 is 10cm on a sie. When placed in water, what height of the block will float above the surface? (water density =1.00g/cm3)
Two blocks of masses m1 and m2 are connected by an ideal string passing over an ideal pulley. Find a relation between the variables that would guarantee that the block is initially slowing down
Andrea thinks she's sitting at rest in her 5.0-m-long dorm room as she does her physics homework. what range is her velocity
Using Gauss' Law, find the electric field (magnitude and direction) between the cylindrical shell and the rod. The electric field will depend on the distance r from the central axis of the solid rod. Find the amount of charge enclosed by the surfac..
Point A is at a potential of +250 V, and pointB is at a potential of -140V. An α-particle is a helium nucleus that containstwo protons and two neutrons; the neutrons are electrically neutral.
A boy of mass 54.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. Find the final velocity of the skateboard
Zach, whose mass is 83kg , is in an elevator descending at 10m/s . The elevator takes 3.4s to brake to a stop at the first floor. What is Zach's weight before the elevator starts braking
A conductor carrying a current I = 14.7 A is directed along the positive x axis and perpendicular to a uniform magnetic field. A magnetic force per unit length of 0.131 N/m acts on the conductor in the negative y direction. (a) Determine the magnitud..
a 30-cm tall (height) ad 4.0 in diameter plastic tube has a sealed bottom. The mass of the tube if 30.0g. What is the density of the liquid
Standing on the surface of a small spherical moon whose radius is 6.81·104 m and whose mass is 7.07·1018 kg, What maximum height above the surface of the moon will the rock reach
A solid ball encounters a 0.760 m vertical rise on the way back to the ball rack. Find the translational speed at the top
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below the freezing mark. How much heat is released by the water when it freezes
A basketball star covers 2.6 m horizontally in a jump to dunk the ball. His motion through space can be modelled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02m when he leaves the floor. It reaches a..
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