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1. A battery with 12-V emf has a terminal voltage of 11.4 V. When it delivers a delivers a current of 20 A to the starter of a car. What is the internal resistance r of the battery?
A) how much emf is delivered but the battery above when it delivers a current of 20 A? (b) how much of this power is delivered to the starter? (c) by how much does the chemical energy of the battery decrease when it delivers a current of 20 A to the starter for 3 min? (d) how much heat is developed in the battery when it delivers a current of 20 A for 3 min?
A cylindrical electromagnet contains a uniformly magnetized core having a magnetization of 1.9 106 A/m, Find the magnetic field in the core
NASA sends a satellite to another planet by placing the satellite in a Keplerian orbit (around the sun) such that the perihelion is at the radius of the Earth's orbit (1 AU) and the aphelion is at the radius of the planet's orbit. Most of the trip is..
in the drawing the head-up display is designed so that the distance between the digital readout device and virtual
A proton moving at 7.6 × 106 m/s through a magnetic ?eld of 8.8 T experiences a magnetic force of magnitude 2.5 × 10?12 N. What is the angle between the proton's velocity and the field
The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Estimate the net force between a cytosine and a guanine
question aluminum metal is made industrially by electrolysis of al2o3 dissolved in molten na3alf6. how many grams of al
The four tires of an automobile are inflated to a gaugepressure of 2.3 105 Pa.Each tire has an area of 0.024m2 in contact with the ground. Determine the weight of the automobile
A standing wave has been created on a string of length 1.5m. The frequency of the wave is 25Hz. The ends of the string are nodal points and there are 3 antinodes. If the maximum amplitude of the wave is 5cm, write complete expressions, including v..
A spherical capacitor contains a solid spherical conductor of radius 0.5mm with a charge of 7.4 micro coulombs, surrounded by a dielectric material with er = 1.8 out to a radius of 1.2mm, then an outer spherical non-conducting shell, with variable ch..
Find the potential difference required to accelerate protons fromrest to 10% of the speed of light (in MV). (At this point,relativistic effects start to become significant.)
suppose you warm up 540 grams of water about half a liter or about a pint on a stove and while this is happening you
A 1.2-cm-tall object is located 4.8cm to the left of a converging lens with a focal length of 5.8cm. Find the size of the final image
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