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A solar collector is placed in direct sunlight where it absorbs energy at the rate of 910 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.79. What equilibrium temperature does the collector reach? Assume that the only energy loss is due to the emission of radiation.
A typical ten-pound car wheel has a moment of inertia of about 0.35kg m^2. What is the rotational kinetic energy of the rotating wheel
question1prairie dogs live in underground burrows with at least two entrances. one entrance is higher above ground and
A spring is hung from the ceiling. A 0.322 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
a photocell that detects the amount of light transmitted through the finger at each wavelength. Identify the frequency of each of these light sources. If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitu..
A long thin rod of mass m = 100 g and length L = 1 m is pivoted about one end and oscillates in a vertical plane. Find the period (in s) of small oscillations
A 20.0 kg wood ball hangs from a 1.70 m-long wire. The maximum tension the wire can withstand without breaking is 500 N. What is the largest speed this projectile can have without causing the cable to break
A highway is to be built between two towns, one of which lies 36.0 km south and 88.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed? length km..
An airplane has a mass of 3.0*10^6 kg and air flows past the lower surface of the wing at 96 m/s, how fast must the air flow over top of the wing
A 4.0 kg cube of iron slides from rest down a frictionless ramp (1.5 m above flat surface), How fast are they going after the collision
If the maximum acceleration vehicle's brakes are capable of is -6.00 m/s2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer.
A small coil has a cross section of 3.5 cm2 and consists of 12 turns of wire. If the loop carries a current of 140 mA, what is the torque required to hold the loop
A 22.5-mW laser beam of diameter 1.98 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
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