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An object at an initial temperature of 27 oC is raised to a temperature of 877 oC. How much more energy does the object emit as blackbody raidation at the higher temperature compared to the lower temperature?
32.5
215.9
864.5
1,113,123
Above graph shows the data collected by a student who wanted to find the resistance of an unknown resistor. Questions below are based on the graph and his experiment. What is the law he can probably use in the above experiment?
A 2.40 H coil with a resistance of 3.95×10^2 Ohm is in series with a 4.86×10^3 Ohm resistor. What is the peak value of the potential difference across the coil
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you need to build an ammeter that can measure up to 0.5 a. you are given a galvanometer that reads 75 a at its
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 88.0 cm, what was the speed of bullet at impact with the block.
The elevator of a large building is designed to raise a net mass of 400 kg at a constant speed of 12 m/s using an electric motor. Find the minimum power rating of the motor
You are going to lift an elephant (mass = 2.6 103 kg) over your head (1.9 m vertical displacement). Calculate the work required to do this
a how far from a 51.4 mm focal-length lens must an object be placed if its image is to be magnified 2.50 and be real?b
A charged particle (Q = 10 C, m = 0.01 kg) moves at a speed of 670 m/s perpendicular to the direction of a uniform magnetic field of 0.06 T. What is the radius of the circular orbit of the particle
A simple pendulum consists of a ball connected to one end of a thin brass wire. The period of the pendulum is 1.25 s. find the change in the period of the heated pendulum
A man of mass m = 70.0 kg pushes a rotating platform of mass M = 85.0 kg and radius R = 3.00 m at the playground with a tangential force tF of magnitude 55.0 N for 10.0 s. Ignore air resistance.
A 10 kg block sits motionless on a table in spite of an applied horizontal force of 2 N. What are the magnitudes of the reaction force
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