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The primary coil of a step-uptransformer is connected across the terminals of a standard wallsocket, and resistor 1 with a resistance R1 is connected across the secondary coil. The current in the resistor is the nmeasured. Next, resistor 2 with a resistance R2 isconnected directly across the terminals of the wall socket (with out the transformer). The current in this resistor is also measured and found to be the same as the current in resistor 1. How does the resistance R2 compare to resistance R1?
A 5 kg object is dropped from rest 2.5m above the ground. What is the kinetic energy of the object just before it hits the ground
A 2.50g ice flake is free from the edge of a hemispherical bowl whose radius r is 31 cm. The flake-bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl?
A man standing in front of a camera. The camera lens has a 53 mm focal length. How high is the man's well-focused image on the film
A dentist uses a mirror to examine a tooth. The tooth is 1.04 cm in front of the mirror, and the image is formed 11.1 cm behind the mirror. Determine the mirror's radius of curvature
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.27 cm. How far behind the pinhole should you place the viewing screen
A slab of marble is resting on the ground. It weighs 600 N and has the dimensions 0.1m x 0.2m x 1.0m. What is the greatest pressure that the slab can exert on ground.
The sodium D line is a doublet consisting of two wavelengths, 588.995 and 589.592 nm. Calculate the angular separation between these two lines in the first-order spectrum for a grating with 4000 lines per centimeter. Repeat for the second order.
An ideal monatomic gas expands isothermally from 0.600 m3 to 1.25 m3 at a constant temperature of 800 K. If the initial pressure is 8.00 10^4 Pa. Find the thermal energy transfer Q
A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 6.0°C
An unknown material has a normal melting/freezing point of -25.1° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). What is the latent heat of fusion of the unknown material
A converging lens (f = 10.8 cm) is located 32.9 cm to the left of a diverging lens (f = -6.06 cm). Locate the final image of the stamp relative to the diverging lens
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other? (Hint: Use charge conservation and solve for one of the initial charges. You would end up with a quadratic equation. The solutions g..
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