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The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to have the same length. If the slower spaceship is moving with a speed of 0.500c, determine the speed of the faster spaceship.
Three blocks, each of mass 12 kg are on the frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction as shown at a rate of a = 1.1 m/s2. What is the net horizontal force on b..
After the first spring compresses a distance of 33cm, second spring acts with the first to increase the force as additional compression occurs. The car comes to rest 53.0 cm after first contacting the two-spring system. Find the car's initial spee..
A heat engine utilizes a heat source at 580 degrees Celsius and has an ideal (Carnot) efficiency of 28%, what must be the temperature of the heat source
A particular wire has a resistivity of 2.7 ? 10-8 ·m and a cross-sectional area of 4.1 ? 10-6 m2. What length of wire is required
The star system algol is a binary with a separation of 10^10 m. The system is 5.1x10^17 m from the earth. what is the angular separation of the stars? What size telescope would be needed to resolve them using visible light( lamda= 500nm)? what if the..
A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from theperson to the first three images seen in the left-hand mirror, whenthe person is 5.00 ft from the mirror on the left wall ..
If the piston has a cross sectional area of 0.0100 m^2 and negligible mass, how high would it rise when the temperature is raised to 250°C.
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.9 when the image of the stamp is located at the near point
a heat engine takes in 150 kj of energy from a source at 740 k and expels 50 kj to a reservoir at 300 k. calculate the
imagine that you fire a proton at the nucleus of a gold atom which contains 79 protons and 118 neutrons. what does the
To appreciate the strength of gravity, calculate the number of steel cables that would be required in the absence of gravity to hold the moon in orbit about the earth.
An electric motor rotating a workshop grinding wheel at a rate of 1.13 102 rev/min is switched off. How long does it take for the grinding wheel to stop
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