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You're designing a toy rocket to be launched by a spring. The launching apparatus has room for a spring that can be compressed 14cm, and the rocket's mass is 65 g. If the rocket is to reach analtitude of 35 m, what should be the spring constant?
A converging lens of focal length 18 cm is 30 cm to the left of a diverging lens of focal length - 6 cm. a coin is placed 12 cm to the left of the converging lens. Find (a) location and (b) magnification of the coin's final image.
Sketch a graph of maximum kinetic energy, KE max against visible light frequency, v for this experiment Label threshold frequency Vc.
Ordinary glasses are worn in front of the eye and usually 2.00{\rm cm} in front of the eyeball. What focal length lenses are needed to correct his vision
A stand, string, a paper or plastic cup, a nail, a roll of paper towels or similar sized paper, coloured sand, or some other dry powdery product, and a ruler or measuring tape.
What is the threshold energy for this reaction to occur
a orbiting satellite stays over a certain spot on the equator of rotating earth. what is the altitude of the orbit
q1. an electron starts from rest 75.5 cm from a fixed point charge with q -0.150 microc. how fast will the electron be
a 1580 kg block of granite is pulled up an incline at a constant speed of 1.43 m/s by a cable and winch. What is the power due to the force applied to the block
the heating coil of a hot-water heater has a resistance of 20 and operates at 210 v. if electrical energy costs
a hammer strikes one end of a thick iron rail of length 8.5 m. a microphone located at the opposite end of the rail
A projectile is shot from the edge of a cliff 140 m above ground level with an initial speed of 100 m/s at an angle of 37 degrees with the horizontal. Find out the time taken by the projectile to hit point at ground level.
two parallel metal plates have area a 255 cm2 and are separated by l 0.50cm. they have a potential difference of 0.25
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