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A) I rub an initially uncharged balloon against my hair. As a result, my hair sticks to the balloon. Explain why this occurs.
B) A positively charged balloon is brought close to a neutral bit of paper, which it attracts. Draw a diagram showing the charge separation in the paper and explain why the attraction occurs.
A basic telephoto lens also uses a combination of a converging lens and a diverging lens. Consider a particular telephoto lens consisting of a converging lens of focal length 40 mm positioned 25 mm from a diverging lens of focal length -20 mm.
An electron is accelerated from rest through a potential difference of 300 V. What is its final speed
An Earth satellite moves in a circular orbit 665 km above the Earth's surface. The period of the motion is 97.8 min. What is the magnitude of the centripetal acceleration of the satellite
What mass of water at 26.0 °C must be allowed to come to thermal equilibrium with a 1.69-kg cube of aluminum initially at 1.50 102 °C to lower the temperature of the aluminum to 74.6 °C? Assume any water turned to stream subsequently recondenses.
A piece of aluminum has density 2.70g/cm 3 and mass775 g. The aluminum is submerged in a container of oil of density 0.650 g/cm3.How much oil does the metal displace? A solid rock, suspended in air by a spring scale, has a gauged mass of 9.0 kg. Whe..
an isolated quantity of an ideal gas at 290.9 k has a volume of 12.97 l at a pressure of 1.84 atm. what is the pressure
The spring stretches 5.0 cm from its previous equilibrium position toward the two spheres. Calculate the spring constant.
A 90 kg astronaut and a 1600 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle.
Who measure the proper time between two flashes of light: A worker standing still on the side of the road, a driver in a car approaching at a constant velocity, both, or neither?
a 5kg ball is hanging from a long but very light flexible wire when it is struck by a 1.5kg stone traveling
When additional mass is added to the piston, the height of the piston decreases to 16.4 cm. Find out the new pressure applied by the piston.
An unknown substance has a mass of 0.125 kg and an initial temperature of 77.5°C. calculate the specific heat of the unknown substance
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