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A block, mass m, slides down a ramp inclined 27 degrees above the horizontal. Calculate the speed of the block if it begins at rest
an ideal gas occupies a volume of 1.0 cm at 20 degrees C, and atmospheric pressure. Determine the number of molecules of gas in the container
A 1.9kg block slides along a frictionless surface at 1.7m/s . A second block, sliding at a faster 4.9m/s , What was the mass of the second block
A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 20 m/s toward the east. What frequency will he hear the assuming that the speed of sound is 343 m/s
A 110 pound person climbs the benches from the bottom to the top of Sun Angel Track Stadium. Calculate the minimum amount of glucose (in grams) that would need to be oxidized
An artillery gun is firing a shell with the initial velocity V0 =250 m/s at an angle 1 =60o to the horizontal. Find the time interval t between shots
which cell will have the fastest gain of water (rate of osmosis) and why also explain why plants appear wilted when the surrounding solution is isotonic.
A 1500 kg car is headed directly for a brick wall when the driver realizes the danger and slams on the brakes. The car's initial speed is 32 m/s, Determine how far the car travels while skidding to
Calculate how long it will take a ball to hit the ground if dropped from a height of 44 m,
The weights of the worker and crate are 912 and 1590 N, respectively. What is the tension in the cable above the worker
A box of weight Fg=2N accelerates down a rough plane that isinclined at an angle %u03C6=30 degrees above the horizontal, What is the work Wgrav done on the box by gravity
A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80 oC and the other end is kept at 0 oC. what is the thermal current in the copper bar
In the drawing, the weight of the block on the table is 418 N and that of the hanging block is 205 N. What is the acceleration of the two blocks
A capacitor has a capacitance of 2.48 10-8 F. In the charging process, how many electrons have been transferred
A certain black body radiates 1200 W at a temperature of 2000 K. how much power does this body radiate at 3000 K
The function y(x,t) = (27.0cm)cos(pix-22pit) with x in meters and t in seconds, What is the transverse speed for a point on the string at an instant when that point has the displacement y = +24.0 cm
A particle has a charge of +3.1 ?C and moves from point A to point B, a distance of 0.28 m. Find the magnitude of the electric force that acts on the particle
A capacitor with an initial potential difference of 100 V is discharged through a resistor when a switch between them is closed at t = 0. At t = 10.0 s, What is the time constant of the circuit
The energy density of radiation is 5.75E-14 j/m^3. The speed of light is 2.99E8 m/s, Determine the the corresponding electric field amplitude
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
A crane drops a 1.0 kg steel ball onto a steel plate. The balls speed just before impact is 2.0m/s. what is the bounce back speed right after the impact
A 49g marble moving at 1.9m/s strikes a 24g marble at rest. What is the speed of the first marble immediately after the collision
Two adjacent resonant frequencies of an organ pipe are found to be 500 Hz and 600 Hz. What is the length of the pipe
A steel wire on a guitar has a length of 0.500 m and a mass of 3.50 x 10^-3 kg. To what tension must the wire be tightened
The howler monkey is the loudest land animal and can be heard upto a distance of 2.5 km. The acoustic power emitted by the howler, in mW is