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1. Consider a 1.36 kW short circuit through a 0.075 Ω resistance. What voltage is involved in the short circuit, in volts?
2. a) A parallel-plate capacitor has a capacitance of c1 = 1 μF when full of air and c2 = 47 μF when full of a dielectric oil at potential difference of 12 V. Take the vacuum permittivity to be µo = 8.85 x 10-12 C2/(N · m2).
b) What is the permittivity of this oil in C2/(N · m2).
c) How much more charge A???q in C does the capacitor hold when filled with oil relative to when itAc€?cs filled with air?
A shopper in a supermarket pushes a cart with a force of 52 N directed at an angle of 25° below the horizontal. What is the net work done on the cart by all forces
A glass rod 96 cm long with an index of refraction of 1.6 has its ends ground to convex spherical surfaces of radii 8 cm and 16 cm. Find the image distance due to refraction at the first surface. (Include the sign.)
Suppose a 100m diameter stony (p= 3 g/cm^3) meteroid impacts the Earth with a speed of 20km/s. Assume all kinetic energy goes into the creation of an atmospheric blast wave.
an alien pilot of an intergalactic spaceship on a mission to measure the sizes of galaxies is traveling at 0.86c
a steel rod is used to transfer heat from a chamber at 300 k to a chamber at 250 k. which of the following changes in
The rms speed of a sample of gas is increased with 12%. What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant?
An airplane flying at a distance of 8.6 km from a radio transmitterreceives a signal of intensity 12 μW/m2. What isthe amplitude of the (a) electricand (b)magnetic component of the signal atthe airplane? (c) If the transmitterradiates uniformly over ..
Two charges Q1=+6mC and Q2=+4mC are separated horizontally on a straight line, find the magnitude of the electric force between these charges
A 27 year-old biologist makes a trip to study lifeforms in a distant planet 17 light-years away. How old is she when she returns according to her clock
Find the magnitude of the momentum of the 1.60-kg ball just before it collides with the 3.50-kg ball. Find the speed of the two balls (now stuck together) at the instant immediately after the collision.
a 1.0-cm-tall object is 20cm in front of a converging lens that has a 10cm focal length. use ray tracing to find the
you're helping with an experiment in which a vertical cylinder will rotate about its axis by a very small angle. you need to devise a way to measure this angle. you decide to use what is called an optical lever. How many degrees has the cylinder ro..
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