A 125-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1720 N. Inside this rocket, a 15.5-N electrical power supply rests on the floor. (a) Find the acceleration of the rocket. (b) When it has re...

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Apparent Weight. A 550-N physics student stands on a bathroom scale in an 850-kg (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 450 N. (a) Find the acceleration of the elevator (magnitude and ...

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In Fig. E24.20, and The capacitor network is connected to an applied potential Vab. After the charges on the capacitors have reached their final values, the charge on is (a) What are the charges on capacitors and (b) What is the applied...

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For the system of capacitors shown in Fig. E24.21, a potential difference of 25 V is maintained across ab. (a) What is the equivalent capacitance of this system between a and b? (b) How much charge is stored by this system? (c) How much charge does the 6....

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An idealized ammeter is connected to a battery as shown in Fig. E25.30. Find (a) the reading of the ammeter, (b) the current through the 4.00- resistor, (c) the terminal voltage of the battery....

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The cube in Fig. E22.6 has sides of length The electric field is uniform, has magnitude and is parallel to the -plane at an angle of measured from the -axis toward the -axis. (a) What is the electric flux through each of the six cube faces and (b) What is...

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From Pillar to Post. Starting from a pillar, you run 200 m east (the x-direction) at an average speed of 5.0 m/s and then run 280 m west at an average speed of 4.0 m/s to a post. Calculate (a) your average speed from pillar to post and (b) your average ve...

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A mass is on an incline connected to another mass hanging straight down. Mass 1 is 20 kg, the angle of incline is 55 degrees with kinetic friction coefficient 0.4. the height of ramp is 12 m, time 3s. Find the force, kinetic friction,...

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A cylindrical capacitor has an inner conductor of radius and an outer conductor of radius The two conductors are separated by vacuum, and the entire capacitor is long. (a) What is the capacitance per unit length? (b) The potential of the inner conductor i...

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Recipe: Celery, cucumber, ginger, turmeric, beat, green...

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A charge of -0.560 muC exerts an upward 0.810-N force on an unknown charge 0.290 m directly below it. Find the magnitude and sign of the unknot charge and the force exerted on the known charge, and the direction....

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At the intersection of Texas Avenue and University Drive, a yellow subcompact car with mass 950 kg traveling east on University collides with a red pickup truck with mass 1900 kg that is traveling north on Texas and has run a red light (Fig. E8.41). The t...

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Coherent light with wavelength 560 nm passes through narrow slits with a separation of 0.350 mm. (a) At a distance from the slits which is large compared to their separation, what is the phase difference in radians in the light from the two slits at an an...

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Coherent light with wavelength 400 nm passes through two very narrow slits that are separated by 0.200 mm, and the interference pattern is observed on a screen 4.00 m from the slits. (a) What is the width (in mm) of the central interference maximum? (b) W...

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A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.0 cm, giving it a charge of -49.0 mC. Find the electric field (a) just inside the paint layer; (b) just outside the paint layer; (c) 5.00 cm outside...

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An advertisement claims that a particular automobile can “stop on a dime.” What net force would actually be necessary to stop a 850-kg automobile traveling initially at in a distance equal to the diameter of a dime, which is 1.8 cm?...

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A typical cost for electric power is per kilowatthour. (a) Some people leave their porch light on all the time. What is the yearly cost to keep a 75-W bulb burning day and night? (b) Suppose your refrigerator uses 400 W of power when it’s running, and i...

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You have just landed on Planet X. You take out a 100-g ball, release it from rest from a height of 10.0 m, and measure that it takes 2.2 s to reach the ground. You can ignore any force on the ball from the atmosphere of the planet. How much does the 100-g...

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A small metal sphere, carrying a net charge of is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of and mass 1.50 g, is projected toward When the two spheres are apart, is moving toward with speed (Fig...

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Particles in a Gold Ring. You have a pure (24-karat) gold ring with mass Gold has an atomic mass of and an atomic number of 79. (a) How many protons are in the ring, and what is their total positive charge? (b) If the ring carries no net charge, how many ...

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A block of ice with mass 2.00 kg slides 0.750 m down an inclined plane that slopes downward at an angle of below the horizontal. If the block of ice starts from rest, what is its final speed? You can ignore friction....

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Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is . If Rover exerts a force of and Fido exerts a force of, find the magnitude of the resultant force and the angle it makes with Rover’s rope....

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A parallel-plate capacitor is connected to a battery. After the capacitor is fully charged, the battery is disconnected without loss of any of the charge on the plates. (a) A voltmeter is connected across the two plates without discharging them. What does...

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(a) What is the potential difference in the circuit of Fig. P25.68? (b) What is the terminal voltage of the 4.00-V battery? (c) A battery with emf 10.30 V and internal resistance is inserted in the circuit at d, with its negative terminal connected to the...

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Due to a jaw injury, a patient must wear a strap (Fig. E4.3) that produces a net upward force of 5.00 N on his chin. The tension is the same throughout the strap. To what tension must the strap be adjusted to provide the necessary upward force?...

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