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1) A rock is suspended form a scale reads 10.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 6.25 N. What is the density of the rock? ((answer: 2.67 times the density of water))
2) A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum speed of the needle? ((answer: 20.3 cm/s))
A solid sphere (M=2.0 kg and R=0.5 m) is rolling without slipping on a horizontal surface at speed vcm=4.3 m/s, How high will it go on the incline before it rolls down
A 12.0 resistor, 10.0 mH inductor, and a 50.0 µF capacitor are connected in series to a 55.0 V (rms) source having variable frequency. Find out the energy delivered to the circuit during one period if the operating frequency is twice the resonance..
A 1,216-kg car drives through a turn with radius 42 m. The coefficient of static friction is 0.9 and the coefficient of kinetic friction is 0.52. find the maximum speed (constant) at which the car can negotiate the turn
Two converging lenses are placed such that they are three focal lengths apart. A final image is projected on a screen which is measured to be 82.0 cm to the right of the final lens. If it is known that the two lenses have the same focal length of 2..
A9.0-V battery is connected to a capacitor, resulting in51.0µC of charge stored on the capacitor. How much energy is stored in the capacitor?
for a sphere e falls off with 1r2 for an infinite line charge e falls off with 1r for an infinite sheet of charge its
The capacitor in an RC circuit has a capacitance of 23.6 µF. what should be the resistance
Determine the current density, resistance and electric for the copper wire, if the wire is 10 m long
What is its speed just before it strikes the ground and how long does the ball take to reach the ground?
A dog has thick fur, with a thermal conductivity of 0.040W/(m • K). The dog's metabolism produces heat at a rate of45 W, determine what is the outside temperature
A wire carrying a 29.0 A current passes between the poles of a strong magnet perpendicular to its field and experiences a 2.17 N force on the 4.00 cm of wire in the field
A workman carries a sheet of metal up to the roof of a skyscraper by transporting it in the building's elevator. Inside the elevator, the metal sits at an angle of 26o from the horizontal. The workman absentmindedly places his toolbox on the smoot..
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