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Two spaceships, each of proper length 100 m, pass near each other heading in opposite directions. If an astronaut at the front of one ship measures a time interval of 2.50 x 10^-6 sec for the second ship to pass him, then
(a) what is the relative velocity of the spaceships
(b) What time interval is measured on the first ship for the front of the second ship to pass from the front to the back of the first ship?
In a ballistics test, a 25.0g bullet traveling horizontally at 1200m/s goes through a 40.0cm -thick 350kg stationary target, What average force does the bullet exert on the target
A 30 g ice cube floats in 210 g of water in a 100 g copper cup; all are at a temperature of 0°C. A piece of lead at 95°Cis dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead?
a convex lens with a 5 cm radius is used to focus sunlight on a piece of paper to a spot 1 mm in diameter. if it takes
A boy shoves his stuffed toy zebra down a frictionless chute, starting at a height of 1.49 m above the bottom of the chute and with an initial speed of 1.55 m/s. How far from the bottom of the chute does the toy zebra come to rest
Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 1.9 m/s parallel to the ground. What is the magnitude of the initial velocity
Suppose a single electron orbits about a nucleus containing two protons (+2e), Determine the magnitude of the electron's centripetal acceleration
A 7.00 kg hanging weight is connected by a string over a pulley to a 4.00 kg block that is sliding on a flat table. If the coefficient of kinetic friction is 0.166, discover the tension in the string.
A 35.5 kg girl and a 58.0 kg boy are on the surface of a frozen lake, 12.5 m apart. Using a rope, the girl exerts a horizontal 4.60 N force on the boy, pulling him toward her.
When Thomson experimented with his apparatus, he noticed that in one run, the electron beam dropped 1.35 cm. when it emerged from the parallel plate region (where the electric and magnetic fields were present). If L = 5 cm, E = 1000 volts/meter, d..
What length of wire is required
A typical set of stairs is angled at 38 degrees. You climb aset of stairs at a speed of 3.6 m/s. How much height will you gain in 5.0 s? How much horizontal distance will you cover in 5.0 s?
A wire of diameter 0.600 mm and length 60.0 m has a measured resistance of 1.40 ohm. What is the resistivity of the wire
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