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How does water pressure one meter below the surface of a small pond compare with water pressure one meter below the surface of a huge lake?
A man scientist decides to build a machine that will use a 0.5 Tesla magnetic field to make electrons (charge = 1.6 x 10^-19 C and m= 10^-30Kg) travel in circles of radius 2 cm. To do this he must
A 6.80 H inductor with negligible resistance is connected across an ac source whose voltage amplitude is kept constant at 31.2 V , but whose frequency can be varied. a) Find the current amplitude wh
A container is filled to a depth of 22.0 cm with water. On top of the water floats a 28.0-cm-thick layer of oil with specific gravity 0.500. What is the absolute pressure at the bottom of the contai
Consider a beam of light that passes through two small parallel slits and shines on a screen. Will the intensity of the light at the central bright spot on this screen be twice as bright as the inte
A solenoid is wound with a single layer of copper wire of radius 0.29 cm. The solenoid is 2.5 cm in diameter and 2.8 m long. What is the inductance of the solenoid per unit length?
The power of the pulse is 2.80 MW. If we assume that the atoms contributing to the pulse underwent stimulated emission only once during 0.500 x10-6s, how many atoms contributed?
A step-up transformer has 50 turns on the primary coil and 500 turns on the secondary coil. If this transformer is to produce an output of 5000 V with a 12-mA current, what input current and voltage
A 45 turn coil of radius 5.4 cm rotates in a uniform magnetic field having a magnitude of 0.55 T. If the coil carries a current of 30 mA, find the magnitude of the maximum torque exerted on the coil
An uniform electric field of magnitude E = 100 N/C is oriented along the positive y-axis. What is the magnitude of the flux of this field through a square of surface area A = 2 m2 oriented parallel
What average voltage is induced in the coil? Express the answer with two decimal places.
A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the person to the first three images seen in the left-hand mirror, when t
What are the rms values of the (a) electric and (b) magnetic fields?
What must be the value of the inductance in order that this station can be tuned in by the radio?
When viewed in a spherical mirror, the image of a setting sun is a virtual image. The image lies 17 cm behind the mirror. (a) What is the focal length of the mirror? (b) What is the radius of curvat
The image behind a convex mirror (radius of curvature = 61.0 cm) is located 19.0 cm from the mirror. (a) Where is the object located (give the distance to the mirror) and (b) what is the magnificati
The 1400-turn coil in a dc motor has an area per turn of 2.0 x 10-2 m2. The design for the motor specifies that the magnitude of the maximum torque is 5.5 N·m when the coil is placed in a 0.2
Consider two straight conductors of length 1.1 m, carrying current of 24 A and 12 A respectively. If they are placed 0.1 m apart, what is the value 106 ×F, where F is the magnitude of the forc
Question: An archer, about to shoot an arrow, is applying a force of +320 N to a drawn bowstring. The bow behaves like an ideal spring whose spring constant is 420 N/m. What is the displacement of t
With the glasses the person can see an object clearly that is very far away. How far from the eyes is the person's far point located?
A capacitor with an initial potential difference of 144 V is discharged through a resistor when a switch between them is closed at t = 0 s. At t = 10.0 s, the potential difference across the capacit
An object with a 5.0 μC charge is acclerating at a 0.00050 m/s due to an electrc filed. If the object has a mass of 2.0mg, what is the magnitude of the electirc field.
A mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.56 cm. If the spring constant is 237 N/m and the mass is 0.400 kg; Determine the mechanical energy of the
A crossed-field velocity selector has a magnetic field of magnitude 0.045 T. The mass of the electron is 9.10939 × 10^-31 kg. What electric field strength is required if 86 keV electrons are t
A lamp is suspended by a massless string from the ceiling of a descending elevator which decelerates at 1.7 m/s2. If the tension in the string is 75.0 N, what is the mass of the lamp?