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A 12-V car battery is rated at 120 A h. Assuming that the terminal voltage remains 12 V, for how long can this battery supply power at 29 W? How much charge flows through the battery in this time? H
Suppose 200g of a substance at 90 degrees celsius is dropped into a container with 100g of water at 15 degrees celsius. What is the specific heat capacity of the substance if the temperature of the
An 0.65 kg object is attached to one end of a spring, and the system is set into simple harmonic motion. The displacement x of the object as a function of time is shown in the drawing. With the aid
If the brick has mass 1.80 {\rm kg} and is to reach a maximum height of 3.6 {\rm m} above its initial position on the compressed spring, what distance must the bricklayer compress the spring initial
The energy of a vibrating molecule is quantized much like theenergy of an electron in the hydrogen atom. The energy levelsof a vibrating molecule are given by the equation En= (n + 1/2 )
A metal loop has an area of 0.450m^2 and is placed flat on the ground. There is a uniform magnetic field pointing directly out of the ground. The magnetic field initially has a value of 0.728 T but
An electron is released from rest at a perpendicular distance of 11.4 cm from a line of charge on a very long nonconducting rod. That charge is uniformly distributed, with 6.2 µC per meter. Wh
Ammonia gas is produced commercially from the reaction of nitrogen and hydrogen. What volume of ammonia can be produced from the reaction of 5.5 x 103 kg of N2 and 1.5 x103 kg of H2?
A machine has an 810 g steel shuttle that is pulled along a square steel rail by an elastic cord . The shuttle is released when the elastic cord has 25.0 N tension at a 45 degree angle. What is the
A bicycle tire is filledto a pressure of 4.42atm(65psi) at a temperature of 12 degrees celsius. If the temperature of the tire increases to 33 degreecelsius, what is the pressure in the tire? Assume
The protons are emitted nearly at rest from a source at the center and are accelerated through 600 V each time they cross the gap between the dees. The dees are between the poles of an electromagne
The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 5.0 T, and the current in the solenoi
Determine the spatial separation between the two isotopes after they have traveled through a half-circle.
A 40-W lightbulb connected to a 120-V source experiences a voltage surge that produces 135 V for a moment. By what percentage does its power output increase? Assume its resistance does not change.
A radio active substance has a half-life of 46.5 minutes. How many grams of the radio active substance will remain in a 822.4g sample after four hours have elapsed?
A sample of a radioactive substance used in detecting skin cancer produced 592 counts in one minute at the beginning of a test and acount of 451 counts in one minute after one day.
An interesting (but oversimplified) model of an atom pictures an electron "in orbit" around a proton. Suppose this electron is moving in a circular orbit of radius 0.30 nm (3.0 x 10-10) and the forc
A chemically correct mixture of gaseous methan and air at 77 F is admitted into a nozzle where it completely burns. Calculate the nozzle exit velocity in feet per second if the exit temperatur
A gas syringe at 20 Celsius contains 20ml of Co2 gas. The pressure of the gas in the syringe is 1.0 atm. What is the pressure in the syringe at 20 Celsius if the plunger is depressed to10ml?
Iron forms a magnetic oxide with the formula Fe3O4 that contains both Fe2+ andFe3+ ions. What is the average oxidation number of iron in this oxide?
A point charge (-5.0 µC) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 µC) is placed on the x axis at x = -4.0 cm. What is the magnitude of the electric force on a thi
In one such preparation,water (20 mL), sodium bromide (20 g) and cyclohexanol (10.5 mL, density 0.96) were mixed andconcentrated sulfuric acid (20 mL; density 1.85) was added dropwise to the swirled
It is traveling directly at an infinite plane of charge with a charge distribution of +3.21 C/m2. If it is currently 1.29 m away from the plane of charge, how close will it come to the plane before st
Two 25.0g spheres are hanging from lightweight strings that are each 35.0 cm in length. Each has the same charge They repel each other and make an angle of 5.00 degrees to the vertical. What is the
Determine the speed of the elevator just before it makes contact with the spring. Determine the amount the spring compresses'