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An archer shoots an arrow with a velocity of 43.0 m/s at an angle of 48.0° with the horizontal. An assistant standing on the level ground 150 m downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow.
(a) What is the initial speed of the apple? m/s (b) At what time after the arrow launch should the apple be thrown so that the arrow hits the apple? s
A long, straight wire has a 13.7 A current flowing in the positive x-direction. Close to wire is a square loop of copper wire that carries a 2.17 A current in direction shown. The near side of the loop is d = 46.3 cm away from the wire.
An atomic nucleus of mass m travelling with speed v collides elastically with a target particle of mass 2.000m (at first at rest) and is scattered at 90.
How much heat would flow by the glass in 1.00 h if there is a temperature difference of 3^circ {rm C} between the inner and outer surfaces.
A pair of speakers separated by 0.820 m are driven by the same oscillator at a frequency of 652 Hz. An observer originally positioned at one of the speakers begins to walk along a line vertical to the line joining the speakers.
Traffic is moving along the highway at 51 km/h on a rainy day. Illustrate what is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
What is the velocity of the ice skater after throwing the snowball. avoid friction and air resistance.
Two carts with masses of 4.5 kg and 3.9 kg move toward each other on a frictionless track with speeds of 5.6 m/s and 4.3 m/s, respectively. The carts stick together after colliding head-on.
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 3000N, and the moment arm of this force is 5cm. a) Draw a free body diagram o..
A ship's mast reaches to a height of 15 meters above the surface of a 10-meter- deep lake. When the sun is 30 degrees above the horizon, how long will the shadow of the mast be on the bottom of the lake?
An electron is at rest just above the surface of a sphere with the radius of 1.90 mm and a uniformly distributed positive charge of 2.1 x10-15 C.
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length (include sign if negative)? (b) How tall is the pencil's ..
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. How many excess electrons does she get, and by how much does her mass increase?
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