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A solar collector is located in direct sunlight where it absorbs energy at the rate of 830 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.65. Find what equilibrium temperature does the collector reach? Suppose that the only energy loss is due to the emission of radiation.
The mass (m) equals 1.02 kg is sliding on a rough horizontal surface as shown. A force F = 8.41 N is applied at an angle of 38.7 degrees. Calculate the acceleration (a) (in m/s2) of the mass on the surface if the coefficient of kinetic friction is 0...
A0.430kg pendulum bob passes through the lowest part of its path at a speed of3.80m/s. What is the tension in the pendulum cable at this point if the pendulum is 80.0 cm long
An electron is accelerated by a constant electric field of magnitude 325 N/C. Find the acceleration of the electron
A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, What is the maximum height the blue ball reaches
the collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy
A piece of glass has a temperature of 71.0 °C. Liquid that has a temperature of 38.0 °C is poured over the glass, evaluate the specific heat capacity of the liquid
Air that occupies 0.15 cubic meters at 1.03e+05 Pa gauge pressure is expanded isothermally to atmospheric pressure and then cooled at constant pressure until it reaches its initial volume
a car is going at a speed of 21.6 kmhr when it encounters a 12.8m long slope of angle 30 degree. the friction
You stand on a frictional platform that is rotating at 1.9 rev/s. Your arms are outstretched, and you hold a heavy weight in each hand. What is the resulting angular speed of the platform
Two point charges Q1 = +5.25 nC and Q2 = ?2.15 nC are separated by 40.0 cm, What is the electric potential at a point midway between the charges
A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). How many free electrons does the battery contain
Two sources have sound levels of 104dB and 62.3 dB. what is their combined intensity
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