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A 320-kg car is moving at 25.0 m/s. Suddenly after the breaks are hit to lock the wheels, it comes to a screeching stop in an 8.0-m distance. A.) Calculate the change in kinetic energy of the car wh
The dome of a Van de Graaff generator receives a charge of 2. 10^-4 C. Find the strength of the electric field in the following situations.
Now a pin A is inserted to hold the block in place in the barrel and the device is turned into a horizontal position. When a is pulled up, calculate the speed of the block as it comes out of the bar
The magnetism of the Earth acts approximately as if it originates from a huge bar magnet within the Earth. Which of the following statements is true?
what is the mass of the water that must pass through the turbine each second to supply this power? Answer in units of kg/s
A tropical fish aquarium has thick transparent windows made of a material whose refractive index is 1.742. What percentage of the light incident on this window at normal incidence is transmitted?
A 3.5-kg block and a 1.9-kg block connected by a string that passes over a small pulley hang vertically. Calculate the tension in the string and the acceleration of the two blocks.
What would be the sign (positive/negative) of the shaft work for a compressor? Give an explanation for your answer.
Neglecting the radiation heat exchange between the air in the room and the man's body, calculate the maximum temperature in °C to which these walls can be set so that the body temperature of the
The solenoid has 1250 turns per meter and a diameter of 5.85 cm , and carries a current of 2.15 A. Find the magnetic flux through the loop when L = 5.85cm. Find the magnetic flux through the loop wh
For an RLC circuit with a resistance of 13.0 k? a capacitance of 7.0 µF, and an inductance of 35.0 H. What frequency is needed to minimize the impedance?
Draw a schematic of the turbine as a control volume, label all the mass interactions with the surroundings and calculate the net rate of flow work for this turbine. The turbine functions as a steady
The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.325
Which mode of heat transfer out of conduction, convection and radiation is principally at work in the following situations? A) You touch a hot stove and your hand gets burnt.
An electric field of intensity 3.0 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true:
A circular coil of wire 8.4cm in diameter and has 16.0 turns and carries 2.70A current. The coil is in a region where the magnetic field is .640T. What is the maximum torque? Can you please tell me
The ramp is at an angle of 31.5 degrees with the horizontal. The package has a mass of 9.25 kg. the coefficient of static friction between the ramp and the package is .385. (keep in mind that the sp
A point particle with charge q = 97 µC is placed at a corner of a cube of edge a = 11 cm. What is the flux through (a) each cube face forming that corner and (b) each of the other cube faces?
A spacecraft is in orbit around a planet. The radius of the orbit is 3.0 times the radius of the planet (which is R = 71510 km). The gravitational field at the surface of the planet is 22 N/kg. What
A gold nucleus has a radius of 7.3 x10^-15 m and a charge of +79e. Through what voltage must an alpha-particle, with its charge of +2e, be accelerated so that it has just enough energy to reach a di
A flat surface having an area of 3.6 m^2 is rotated in a uniform electric field of magnitude E = 6.3 x 10^5 N/C. Determine the electric flux through this area in the following situations: (a) when
Suppose 2.00 g of hydrogen is separated into electrons and protons. Suppose also the protons are placed at the earth's North Pole and the electrons are placed at the South Pole. What is the resultin
A spark occurs at the tip of a metal needle if the electric field strength exceeds 5.00×106 N/C , the field strength at which air breaks down. what is the minimum surface charge density for prod
A 5.0-liter gas tank holds 1.4 moles of helium (monatomic) and 0.7 moles of oxygen (diatomic), at a temperature of 260 K. The atomic masses of helium and oxygen are 4.0 g/mol and 16.0 g/mol, respect
What is the initial magnitude of the acceleration of the alpha particles due to this force? Note that the mass of an alpha particle is 4.0026 u.