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A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 30 MW and lasts 2.9 ns. What is the total energy of the pulse? How many photons are emitted in this pulse?
Calculate the period of a satellite orbiting the Moon, 130km above the Moon's surface. Ignore effects of the Earth
A steel ball with a mass of 32.0g is dropped from a height of 2.10m onto a horizontal steel slab. The ball rebounds to a height of 1.50m. find the average force on the ball during the impact
a 87.40 kg hiker has ascended to a height of 1867 m in the process of climbing mt. washington. by what percent has the hikers weight changed
One possible means of achieving space flight is to place a perfectly reflecting aluminized sheet into Earth 's orbit and to use the light from the Sun to push this solar sail. What force is exerted on the sail
Two equally charged, 1.00 g spheres are placed with 2.00 cm between their centers. find the magnitude of the charge on each sphere
A 75 human sprinter can accelerate from rest to 10 in 3.5 . During the same interval, a 34 greyhound can accelerate from rest to 17, evaluate the average power output for each
An electric field of 1.86 kV/m and a magnetic field of 0.515 T act on a moving electron to produce no net force. If the fields are perpendicular to each other, what is the electron's speed
question1all through a balloon ascension wearing an oxygen mask you calculate the weight of a calibrated 5.50-kg mass
A box weighing 600 N is at rest on a ramp at an angle of 32.5o with the horizontal. Find the minimum force required to move the box down the ramp
A proton has an initial speed of 4.6X10^5 m/s. What potential difference is required to bring the proton to rest
The side mirror on a car is convex and has a radius of curvature of 25 cm. Another car is following, 20 m behind the mirror. If the height of the car is 1.6 m, how tall is the image
A 859 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.94 × 10^5 km from the planet's center. What is the force acting on this satellite
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