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A cube of aluminum (Cp = 0.897 J/g•K) has a temperature of 325 K. It is placed in a beaker of cold water. If the aluminum cools to 301 K as the water absorbs 815.7 J of heat, what is the mass of the cube?
Torque can be calculated by multiplying the force (N) applied at 90 degrees to the lever arm at a distance (m) from the pivot point (point of rotation), what is the torque on the lever
Calculate the escape velocity for a planet that has twice the mass of Earth and is half the size of Earth
A tennis player tosses a tennis ball straight up and catches it after 3.0 s. Find the initial velocity of the ball
A uniform solid disk turns around a frictionless spindle with an angular speed wo. Determine what fraction of energy is lost
A point charge q = -8.0 nC is located at the origin. Find the electric-field vector at the field point r = (1.2, -1.6) m
A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s toward the Sun. how much mass must be expelled
A box of mass 8.0 kilogram is accelerated from rest across a floor at a rate of 3.0 m/s for 6.0 s. Estimate what the net work done on the box
A starship blasts past the earth at 2.0\times 10^8\;{\rm{ {\rm m}/{\rm s}}}. With what speed does the laser beam approach the earth
During the time a compact disc(CD) accelerates from rest to a constant rotational speed of 1260rev/min, what is the angular acceleration of the CD
An electrostatic paint sprayer has a 0.200 m diameter metal sphere at a potential of 22.0 kV. What charge is on the sphere
When jumping straight down, you can be seriously injured if you land stiff-legged. When he bends his knees, he comes to a halt in 0.130 s. Find the magnitude of the average net force now
Two conductors are made of the same material and have the samelength. Conductor A is a solid wire of diameter 1.4 mm.Conductor B is a hollow tube of outside diameter 7.7 mm and inside diameter 6.7 mm. What is the resistance ratio RA/RB ,measured be..
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