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When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of then shifted frequency to the observed frequency is 2.6. What is the galaxy's speed relative to the Earth?
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
You stand in the earth's magnetic field, directly facing its horizontal component (in other words, facing magnetic south). Compute the outward flux through your body's back surface
Coasting along at 8.10 m/s, a 60.0 kg bicyclist on a 8.60 kg bicycle encounters a small hill. how much work was done on the bicyclist and her bike
A 60.0kg swimmer stands at the edge of a 200kg boat that is motionless on the water of a lake. calculate the velocity of the boat if friction between the boat and the water is neglected
An airplane is heading due south at a speed of 580 km/h. If a wind begins blowing from the southwest at a speed of 90.0 km/h (average), calculate (a) the velocity (magnitude and direction) of the plane, relative to the ground, and (b) how far from it..
Two 2.50cm×2.50cm plates that form a parallel-plate capacitor are charged to ± 0.708nC, What is the potential difference across the capacitor
What is the relationship between impulse and motion? What is the relationship between pairs of forces in certain situations?
The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is travelling at 35.3 m/s at the point shown and the radius of vertical coaster track is 53 meters, to the nearest newton what does the scale read?
The needle of a sewing machine moves up and down in the same hermonic motion its driving force comes from a rotating wheel that is powered by an electric motor. how do you imagine that theup-and-down needle comapres with the period of the rotating..
A helicopter is ascending perpendicularly with a speed of 5.42 m/s. At a height of 146 m above the Earth, a package is dropped from a window. How much time does it take for package to reach the ground.
A 1.1 kg particle-like object moves in a plane with velocity components vx = 20 m/s and vy = 50 m/s, What is its angular momentum relative to the origin at this moment
Two identical parallel-plate capacitors, each with capacitance C, are charged to potential difference ?V and connected in parallel. Then the plate separation in one of the capacitors is doubled. (Use DeltaV for ?V and C as necessary.) (a) Find the..
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