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A spaceship ferrying workers to Moon Base I takes a straight-linepath from the earth to the moon, a distance of384000 {\rm km}. Suppose it accelerates atan acceleration19.6 m/s^2 for the first timeinterval 15.8 min of the trip, then travels atconstant speed until the last time interval15.8 min, when it accelerates at - 19.6 m/s^2, just coming to rest as it reachesthe moon.
A) What is the maximum speedattained?
B) What fraction of the total distance istraveled at constant speed?
C) What total time is required for thetrip?
a window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 190 n and is
Temperatures are often measured with electrical resistance thermometers. Suppose that the resistance of such a resistance thermometer is 162 when its temperature is 16.0 °C. What is the temperature of the liquid
You might have seen basketball showoffs spinning a ball on the tip of a finger. If such a player performs 1.93 J of work to set the ball spinning from rest, at what angular speed will the ball rotate
Here's the question: If you have two metal plates 0.50cm apart, and you drop a bit of liquid (mass of 2.6 x 10^-12 g), How many electrons appear on the drop
Early black-and-white television sets used an electron beam to draw a picture on the screen. What is the speed of electrons in the beam
Electromagnetic waves and sound waves can have the same frequency. What is the wavelength of 1.10 kHz ectromagnetic wave
An iron casting containing a number of cavities weighs 16967.7 N in air and 13515.2 N in water. What is the total volume of all the cavities in the casting
A laser produces an average power of 5.5 W in a light beam 1.0 mm in diameter. Find the peak electric field of the laser light
In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, find the magnitude of the impulse on him from the snow
A 20 gram bullet is fired horizontally into a 400 gram block of wood suspended like a ballistic pendulum. Find the velocity of the bullet just before the impact
A merry-go-round is spinning and has a period of 7.25 s. A boy jumps off in a direction parallel to the radius, what is the new period of the merry-go-round
A 9.66 × 1014 Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05 × 108 m/s. The wavelength of the wave in vacuum is closest to:
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