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A Styrofoam cup holding 101 g of hot water at 1.00 102°C cools to room temperature, 19.4°C. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change in
An automobile traveling at a constant speed rounds a circular curve of radius 300 feet in 7.5 seconds. if the curve causes the car coming out of the curve to move in a direction perpendicular to the
The period of the orbit is two hours. The radius of the planet is 4.25 106 m. What is the true weight of the satellite when it is at rest on the planet's surface?
Two large parallel metal plates are 1.5 cm apart and have charges of equal magnitudes but opposite signs on their facing surfaces. Take the potential of the negative plate to be zero. If the potenti
A 4 kg. stone is dropped form a height h and strikes the ground with a velocity of 25 m/s. a.) Find the kinetic energy of the stone as it strikes the ground.
A luminous point is moving at speed vO toward a spherical mirror with radius of curvature r, along the central axis of the mirror. Show that the image of this point is moving at speed v1 = - (r/2p -
Taking the properties of the egg to be Density = 1020 kg/m3 and Cp = 3.32 kJ/kg · °C, determine how much heat is transferred to the egg by the time the average temperature of the egg rises
At the moment, the box is sliding down at 0.65 m/s and the boy is pushing down the ramp (parallel to the ramp) with 17 N. a) What is the acceleration of the box? (Be sure to give a full answer.)
A Ping-Pong ball has a diameter of 4.0 cm and a mass of 2.47 g. Assume the density of air is 1.22 kg/m3. a) What is the terminal velocity of the ball?
How far does the mug move relative to the horizontal tabletop before the cloth is completely out from under it? Note that the cloth must move more than 30 cm relative to the tabletop during the proc
The space shuttle is the most complex machine ever built and the first orbital spacecraft designed for partial reusability. It has a mass of 2,209,203 kg and is capable of taking up to 11 astronaunt
What is the gravitational potential energy of a ball on Mars with a weight of 37.9 N when it is sitting on a shelf 10.38 m above the Martian floor?
A child sits in a wagon and together they have a mass of 25 kg. The wagon is pulled with a constant speed by a handle that is at an angle of 28° above the horizontal. If the normal force exerted
A sodium ion with mass 2.32×10-26 kg and charge +1.60×10-19 C is moving with velocity 3.00×105 m/s in the positive x direction. An identical particle is moving with the same speed i
When the ionized particles entering a mass spectrometer are simply accelerated across the potential difference between two charged plates, there is always the chance of an uncontrolled variation in
What would be the shortest corrected length of an air column in a closed pipe (open only at one end) if it is resonant at 125 Hz and the temperature is 25 oC?
A metal spherical surface is grounded. Inside and outside the sphere is vacuum. Within the sphere there is a negative point charge q at a distance a from the center M. a) What are the magnitude and
What is the strength of the magnetic field that will cause it to strike the detector at the same location as the proton?
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series
In the radioactive decay of U238 the center of the emerging a particle is at a certain instant 9.0×10-15m from the center of the residual nucleus Th234.
A 25 cm diameter coil consists of 21 turns of cylindrical copper wire 2.2 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 9 x 10-3 T/s. Determi
A series RCL circuit includes a resistance of 328, an inductive reactance of 581, and a capacitive reactance of 535. The current in the circuit is 0.288 A. What is the voltage of the generator?
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 780-kg helicopter rises from rest to a speed of 6.9 m
You pull a 12-kg box across the floor with a strap that is at an angle of 45° above the horizontal. Find the normal force and the tension in the strap, given that the box moves with constant spe