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The voltage across the terminals of a 9.20 Volt battery is 8.10 Volt when the battery is connected to a 40 ohm load. Evaluate the battery internal resistance?
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Question: A rock thrown with speed 12.0m/s and launch angle 30.0 degrees (above the horizontal) travels a horizontal distance of d = 15.5m before hitting the ground. From what height was the rock thrown? Use the value g ...
Question: In recent years, astronomers have found planets orbiting nearby stars that are quite different from planets in our solar system. Kepler-12b, has a diameter that is 1.7 times that of Jupiter (RJupiter = 6.99 Ã- ...
Question: The three 250g masses are connected by massless, rigid rods. What is the triangle's moment of inertia about the axis through the center? What is the triangle's kinetic energy if it rotates about the axis at 6. ...
Question: A slide projector needs to create a 84 cm high image of a 2.0 cm tall slide. The screen is 240 cm from the slide. Assume that it is a thin lens. (a) What focal length does the lens need? cm (b) How far should y ...
Question: A research submarine has a 40-cm-diameter window that is 8.1 cm thick. The manufacturer says the window can withstand forces up to 1.2 x 10 6 N. What is the submarine's maximum safe depth in salt water? The pre ...
Question: A steel cable with mass is lifting a girder. The girder is speeding up. Part A Draw a free-body diagram for the steel cable. Draw the vectors starting at the black dots. The location and orientation of the vect ...
Question: In a semiclassical model of the hydrogen atom, the electron orbitsthe proton at a distance of 0.053 nm. What is the electric potential of the proton atthe position of the electron? What is the electron's potent ...
A car moves with a constant speed of 60 mph. What is the apparent weight of a 70 kg passenger when the car is at the bottom of a dip with a radius r = 100 m? m*g = N + (m*v*v/r) (70kg)(9.8) = N +(70kg)(26.82m/s)(26.82m/s ...
Quesiton: You are testing a new amusement park roller coaster with an empty car with a mass of 108kg. One part of the track is a vertical loop with a radius of 12.0m. At the bottom of the loop (pointA) the car has a spee ...
Question: Suppose an earthquake shakes you with a frequency of 9.5 Hz as it passes and continues on to another city 75 km away, which it reaches in 15 s. What is the wavelength of the earthquake, in meters? The response ...
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