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A spaceship approaching a planet at a speed of 0.20c fires a probe toward a planet. Observers on the planet see the probe approaching at a speed of 0.61c. What the speed of the probe is as gauged from the spaceship?
if we have an electron orbiting an atomic nucleus. we may think the electron is doing a circular motion around the
A person has a near point of NP = 85 cm and a far point of FP = 210 cm. Write a formula for the power, P1, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly
A person jumps up and down on a trampoline, while staying in contact with it. The motion is simple harmonic motion and it takes 1.90s to complete one cycle.
a balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 1.6 kg. find the magnitude of the initial acceleration of the balloon
This problem deals with a multi-loop circuit and I was wondering how you determine the direction of the inner loops which are needed to determine if an amp or volt is added(opposite the inner loop) or subtracted(same direction as the inner loop).
A 10 N horizontal force F pushes a block weighing 9.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.75, What is the frictional force on the block
R 134a flows at steady state through a horizontal pipe havingan inside diameter of 4 cm, entering as saturated vapor at -8degrees C with a mass flow rate of 17 kg/'min. Refrigerant vaporexits at a pressure of 2 bar.
The energy absorbed by an engine is seven times greater than the work it performs. What is its thermal efficiency
In Denver, children bring their old jack-o-lanterns to the top of a tower and compete for accuracy in hitting a target on the ground. what is the direction of its velocity just before it lands
A mixture of 150 g of ice and 300 g of water is at 0 degressC. How many joules f heat energy must be transferred to brind thismixture to a final temp of 75 degress C
A damped mass-spring system oscillates at 275-Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 3.20cm and the energy of the oscillating system is then 32 J.
A 4.50{kg} ornament is hanging by a 1.00{m} wire when it is suddenly hit by a 3.00kg missile traveling horizontally at 12.0{m}/{s} . The missile embeds itself in the ornament during the collision.
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