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During a flare-up from a sunspot, X-rays (electromagnetic waves)are emitted. If the distance between the sun and the earth is 1.50x 1011 m, how long (in minutes) does it take for theX-rays to reach the earth?
A physicist uses a cylindrical metal can 0.210m high and 0.075m in diameter to store liquid helium at 4.22 K; How much helium is lost per hour? The emissivity of the metal can is 0.200
The electron beam inside a television picture tube is 0.40mm in diameter and carries a current of 50uA. How many electrons strike the screen each second
The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 8.0 kg. Find out the moment of inertia of the system about the z axis.
If the laser light wavelength is 1062 (this corresponds to a Neodymium-YAG laser), how many wavelengths are found within the laser pulse
A 2 kg mass is attached to a spring of spring constant 20 N/m. What is the period of mass and spring oscillation
he Sun has an orbital speed of about 220 km/s around the centre of the Galaxy, Estimate the total mass of the Galaxy in Solar masses
A satellite is placed in orbit 8.40 x 10^5 m above the surface of the planet Jupiter. Find the orbital speed of the satellite
The spring of the pressure gauge shown in the figure below has a force constant of 1471 N/m, what change in depth causes the piston to move in by 0.750 cm
Suppose that 0.0025 m^3 of gas in a cylinder is compressed by a piston down to 0.001 m^3 while 675 J of heat flows out of the gas. what was the change in its internal energy
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 degg above the horizontal. Over the entire trip the work done by the air forces is
q1. a map suggests that atlanta is 730 miles in a direction 5.00 degrees north of east from dallas. the similar map
Three unknown resistors are in a bin; let's call them red, green, and blue. When a Physicist connects the three resistors in series to a 30 volt source she measures 1A of current. what is the charging time constant
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