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A particle starts from the origin with velocity 9 m/s at t = 0 and moves in the xy plane with a varying acceleration given by = (9?t) m/s2, where t is in s. Answer the following using t as t as necessary. Determine the vector velocity of the particle as a function of time
A 30-g silver teaspoon at room temperature 200C is placed into 200 g of hot tea 1000C. No heat escapes the spoon-tea system. You assume that the specic heat of tea is the same as that of water.
Reading glasses of what power are needed for a person whose near point is 110cm, so that he can read a computer screen at 52cm? suppose a lens-eye distance of 2cm.
Determine the specific heat capacity of an unknown sample of metal.
The cylinder of a bicycle pump has an interior diameter of 2.0 cm and a length of 40 cm. How far down (in cm) must you push the piston before air begins flowing into the tire
A 5.0V potential difference is applied between the ends of a 0.80mm -diameter, 90cm -long nichrome wire, What is the current in the wire
A uniform rod of mass 1.5kg and Length=0.18m rotates clockwise on the plane of your paper at an initial rate of 40rev/s about its central axis. Determine the initial angular momentum of the rod
A molecule of DNA (deoxyribonucleic acid) is 2.05 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.88% upon becoming charged. Determine th..
q1. in a skating stunt called as cracking-the-whip a number of skaters hold hands and form a straight line. they try to
How much higher would the ball have gone in a vacuum. The time constant of an RC circuit is 4.8 s. How much time t is needed for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge.
A student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
If the loop's diameter changes from 24.0cm to 5.8cm in 0.67s , what is the direction of the induced current, If the coil resistance is 2.6? , what is the average induced current
Two speakers, one directly behind the other, are each generating a 152-Hz sound wave. What is the least separation distance between the speakers that will produce destructive interference at a listener standing in front of them.
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