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A bullet is shot straight up into the air. It takes 30.5 s for the bullet to go straight up and fall back straight down to its starting position. At what initial speed (in m/s) was the bullet shot into the air? (Ignore air resistance.) Show work please
A small fly of mass 0.21g is caught in a spider's web. What is the value of the effective spring stiffness constant k for the web
A 59.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of the circle with a radius of 3.80 m.
What speed would Michelson have computed for Earth's motion through the ether had the experiment seen a shift of one fringe
When the Sun is straight overhead, a hawk dives toward the ground with the constant velocity of 4.50 m/s at 52° below the horizontal. Compute the speed of her shadow on the level ground.
An ice machine converts 10 degree celsius water to 0 degree celsius ice. The ice machine has a COP of 3 and consumes elec
An uncharged capacitor is connected to a 55 V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin is then inserted between the plates.
The left ventricle of the heart accelerates blood from rest to a velocity of + 25.9 cm/s, How much time does blood take to reach its final velocity
A parallel beam of light containing red (660 nm) and violet (410 nm) wavelengths goes from diamond to water, striking the surface between them at a 19° incident angle
Take the initial direction of motion to be the positive direction. (Indicate the direction of the acceleration by the sign of your reply.)
Evaluate with the strength of the earth's gravity at its surface, how much weaker is gravity at a distance of 10 earth's center.
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from start to stop? (..
An electron and a positron, each moving at 3.0*10^5 m/s, collide head on, disappear, Determine the momentum of each photon
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