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A construction worker is standing in a 2.6 meter deep hole, 3.1 meter from the side of the hole. He tosses a hammer to a companion outside the hole. If the hammer leaves his hand 1.0 meter above the bottom of the hole, at an angle of 35o to the horizontal, find the minimum speed it must have to clear the edge of the hole? Determine how far from the edge of the hole does it land?
An aluminum wire has the same resistanceas a copper wire of the same length. Find the ratio of the aluminumwire's diameter to the copper wire's diameter.
A carpenter carries his 8kg toolbox at constant speed up 2 flights of stairs, each 3m high, in one minute. How much work did the carpenter do in carrying the toolbox up 2 flights
an electric on a airplane operates 20.8 volts a draws a current of 14.7amps. How much energy in joules does the motor use
a plane electromagnetic wave has an energy flux of 711 wm2. a flat rectangular surface of dimensions 100 cm times 24 cm
A car moving at 8 m/s crashes into a barrier and stops in 0.050 s. There is a 17-kg child in the car. What is the impulse needed to stop the child
Two ideal gases have the same mass density and the same absolute pressure. One of the gases is helium (He), What is the temperature of the neon
two point charges q1 4.00nc and q2 ?3.00nc are placed 20.0cm apart as shown in figure 1. there also exists a third
An object with mass m1 = 2 kg traveling east at v1i = 2.8 m/s strikes an object with mass m2 = 3 kg traveling at v2i = 2 m/s in a direction q = 118° counterclockwise from the east. After the collision, the first object rebounds at v1f = 2.8 m/s in..
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
Consider a string with length 36 cm. The two ends are attached to the ceiling, separated by distance 30.0 cm. A 1 kg mass is attached to the string at distance 15 cm from the left end. Then the mass hangs suspended in Earth's gravity. (a) Determin..
two resistors r1 and r2 are in series with a 7.8 volts battery. if r1 has a resistance of 2.0 omega and r2 receives
Comets move around the sun in very elliptical orbits. What was the comet's speed when it crossed Neptune's orbit in 2006
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