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The star Alpha goes supernova. Ten years later and 80 ly away, as measured by astronomers in the galaxy, star Beta explodes.
An alien spacecraft passing through the galaxy finds that the distance between the two explosions is 150 ly. According to the aliens, what is the time between the explosions?
It is then projected up the same plane with an initial speed 4.40 m/s. Explain how far up the incline will the block move before coming to rest?
1.9*10^20photons per second are emitted by a 70W lightbulb, the wavelength is 550nm. How many photons per second are entering the pupil
A 3.80 m-long, 430 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque abou..
Seismographs measure the arrival times of earthquakes with a precision of 0.100 s.7 To get the distance between to the epicenter of the quake, they compare the arrival times of S- and P-waves, which travel at different speeds.
Using Ampère's law, calculate the magnetic field inside and outside of a toroidal coil with a radius of 25 cm
Two boxes with different masses M1 = 0.7 kg and M2 = 2.3 kg are tied together on a frictionless ramp surface, What is the tension in the rope connecting the two boxes
An ice block is pushed horizontally on a frictionless surface with initial velocity v0. At some point, it comes to the nearly semicircular bump with a radius R=0.42m and the height h=0.33m above the ground.
Recall from Section 14.3 that the average kinetic energy of an atom in a monatomic ideal gas is given by KE=(3/2)kT, Determine the de Broglie wavelength of a helium atom
What is the horizontal component of the ball velocity
An electron acquires 100fJ of kinetic energy when it is accelerated between two paralle lplates placed at a distance of 1mm
A person pulls a toboggan for a distance of 41.7 m along the snow with a rope directed 24.3 ° above the snow, How much work is done on the toboggan by the tension force
Find out the angle that the total acceleration of the car. the car at the moment the car completes the circle.
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