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An aluminum cylinder is suspended in an unknown fluid by a spring scale. Outside the fluid, the object weighs 20N. In the fluid,
A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is connected across it and a potential difference of 0.504 V when a 945.0 ? resistor is substituted. What is the emf
A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, What is the initial kinetic energy of the car
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
A convex mirror has a focal length of magnitude 7.63 cm. Find the magnification of the image.
A concave makeup mirror is designed so that a person 26 cm in front of it sees an upright image magnified by a factor of two
The number of turns in the primary and the secondary of a step-up transformer are 93 and 439 respectively. what is the output voltage of this transformer
A small 0.300-kg object moves on a frictionless horizontal table in a circular path of radius 2.40 m. what is the radius of the smallest possible circle on which the object can move
Two disks are rotating about the same axis. Disk A has a moment of inertia of 9.10 kg·m2 and an angular velocity of +8.10 rad/s. What is the moment of inertia of disk B
Two charge distributions, Q1=1.4X10^-10C and Q2=3.5X10^-10, WHat is the force between them and the electric field between them?
An automobile tire has a radius of 0.307 m, and its center moves forward with a linear speed of v = 18.3 m/s, Determine the angular speed of the wheel
A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s2. what is the magnitude of the total acceleration a
A small fan has blades that have a radius of 0.0600 m. When the fan is turned on, the tips of the blades have a tangential acceleration of 19.6 m/s2as the fan comes up to speed
The radius of the circle traced out by the second hand on a clock is 6.00 cm. Determine the value of t in seconds
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, If the player comes to rest at third base, how much work was done on the player by friction
Copper has 8.5×1028 electrons per cubic meter. How many electrons are there in a 25.0 cm length of 12-gauge copper wire, what is the average drift speed of the electrons along the wire
You create a diffrent kind of pendulum by swinging a meter stick (mass m) on its end. It swings with small oscillations. Determine the angular frequency w ( I=1/3 ML ^2)
A 67? resistor, an 9.0?F capacitor, and a 36mHinductor are connected in series in an ac circuit. Calculate the impedance for a source frequency of 300 Hz
A rectangular loop of wire with width 0.4 cm and length 0.6 cm is oriented with the normal to the face of the loop, Find the magnetic flux through the loop
A child in a boat throws a 5.15-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
In an adiabatic centrifugal compressor atmospheric air at 15 degree Celsius is compared to 600kPa pressure. Find the specific compression work and the efficiency of the compressor
A violin string of length 35 cm and mass 1.1 g has a frequency of 478 Hz when it is vibrating in its fundamental mode. What is the wavelength of the standing wave on the string
A person blows into a rubber tube connected to one arm of a manometer containing glycerin of relative density 1.260. what is the gauge pressure of the air in the person's lungs
A 23.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block if T = 20.56 N
The warm source of a Carnot cycle consists of a blast furnace operating at a temperature of 150C, calculate the net heat absorbed from the warm source