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A car of mass 100 kg moving on a horizontal road with a steady velocity of 10 m/s has a total frictional on it of 400N. Find the power due to the engine.
A car now climbs a hill an angle of 8° to the horizontal. Assuming frictional force stays same what engine power is needed to keep the car moving at Km s-1.
A cube floats in water.The length of each side 8 cm. The cube is 3/4 submerged. find the weight of the cube in air
A hand-pumped water gun is held level at a height of 0.65 m above the ground and fired. Find the gauge pressure of the water gun's reservoir at the instant when the gun is fired
Two masses undergo a front-to-back collision. The mass m has aninitial velocity 2v0, and the mass 2m has an initial velocity v0.After the collision, they stick together, forming a compound system. What is the final kinetic energy of the compound ..
A 4.47 m long pole stands vertically in a lake having a depth of 2.22 m. while the sun is 62.6 degrees above the horizon, find the length of the pole's shadow on the bottom of the lake.
The press box at a baseball park is 36.0ft above the ground. What is the horizontal distance from the press box to second base
What are the three longest wavelengths for standing waves on a 294-cm-long string that is fixed at both ends? If the frequency of the second-longest wavelength is 58Hz , what is the frequency of the third-longest wavelength?
Calculate the distance along the ground, measured from a point directly beneath the point of release, to where the package hits the earth.
A 115-V source of emf is attached to a heating element with is a coil of nichrome wire (r=100*10^-8) of cross section 1.20 mm^2. What must be the length of the wire
An ac generator supplies an rms voltage of 5.00 v to an RL circuit. At a frequency of 21.0kHz the rms current in the circuit is 45.0 mA; at a frequency of 26.0 kHz the rms current is 40.0 mA. What is the values of L in this circuit? What is the value..
A 30 kilogram block rests on a rough horizontal surface with μk = 0.20. Evaluate how much work is done on the surface by the 30 kg block
A barge is hauled along a straight-line section of canal by twohorses harnessed to tow ropes and walking along the tow paths oneither side of the canal. Each horse pulls with a force of480 N at an angle of 14° with the centerline of the canal. What i..
An optical engineer needs to ensure that the bright fringes from a double slit are 15.7 mm apart on a detector that is 1.61 m from the slits. how far apart should the slits be
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