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Three ships leave a spacestation at nearly the same time. As seen by a spacestation observer, ship 1 is directed 30 deg. west of north moving at 0.950c, ship 2 is directed 60 deg south of west at 0.900c, and ship 3 is directed east at 0.850c. Find the speed and direction of ships 2 and 3 as seen by an observer in ship 1.
plane flies at 1.13 times the speed of sound. Its sonic boom reaches a man on the ground 0.99 min, What is the altitute of the plane
How much work the power plant produces in a day. How much energy is discarded to low temperature source in a day.
A spherical balloon has the potential to reach a diameter of 35 cm, what would be the volume of this balloon when it reaches a pressure of 0.75P0 and a temperature of -15°C
A 5.0 nC point charge sits at x = 0. At the same time, a 4300 N/C uniform electric field (created by distant source charges) points in the positive x-direction. A. At what point along the x-axis, if any, would a proton experience no net force? B. ..
When a large star becomes a supernova, its core may be compressed so tightly that it becomes a neutron star, what is the speed of a particle (in km/s) on the star's equator
Calculate the magnitude of the current density in the wire. Find out the work done by the hockey player on the puck. What is the change in kinetic energy of the puck.
Water falls without splashing at the rate of 0.210 L/s from a height of 3.90m into a 0.590 kg bucket on a scale. If the bucket is originally empty, what does the scale read 4.00 s after water starts to accumulate in it.
The activity of a radioactive source decreases by 5.2% in 28 hours. What is the half-life of this source
A pilot wants to fly due north a distance of 125 km. The wind is blowing out of the west at a constant 35 km/h. If the plane travel at 175 km/h, how long would the trip take.
The coefficient of expansion of iron and zinc
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
How fast must the car be travelling just as it leaves the cliff in order to clear the river and land safely on the opposite side.
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