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A 782 kg car is pushed at a constant positive velocity in a flat parking lot whose coefficient of friction is 0.18. If the car is pushed for 23 meters,
then what work is done by the forces acting on the object?
What net work is done on the car?
The work done by friction is ?
The work done by the pushing force is ? (Hint: be careful with sign convention)
The work done by gravity is ?
The work done by the normal force is ?
The net work done is ?
If 20 grams of hot water at 80 C is poured into a cavity in a very large block of ice at 0 C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temperature.
The potential difference between two parallel conducting plates in vacuum is 475 V, What is the kinetic energy of the alpha particle when it reaches the other plate
A flat coil enclosing an area of 0.12 m2 is rotating at 61 rev/s, with its axis of rotation perpendicular to a 0.20 T magnetic field. what is the maximum voltage induced in the coil
A person travels by car from one city to another with different constant speeds between pairs of cities. Determine the distance between the initial and final cities along this route
A cylindrical fishing reel has a moment of inertia of I = 6.61E-4 kg*m2 and a radius of 3.98 cm. A friction clutch in the reel exerts a restraining torque of 1.47 N*m if a fish pulls on the line. What is the force of the fish on the line
A wooden cylinder of length 2.0m and cross section 78cm^2 is suspended in vertical positionwith a string of length 2.5m. Find the linear density of the string
Consider a simple cubic crystal structure with a cube edge a= 3.5x10^-10 m and suppose it is used to scatter 3.10x^-10 m x-rays, Find the Bragg angle theta
A ball is thrown toward a cliff of height h with a speed of 29m/s and an angle of 60? ^\circ above horizontal. It lands on the edge of the cliff 3.5s later. How high is the cliff
The membrane that surrounds a certain type of living cell has a surface area of 6.1 x 10-9 m2 and a thickness of 1.3 x 10-8 m. how many such ions are present on the outer surface?
Two charged particles of equal magnitude (+Q and +Q) are fixed at opposite corner of a square lying in a plane. What is the direction of the force on the test charge due to the two other charges
Two point charges are on the y-axis. A 6.0 µC charge is located at y = 1.50 cm, and a -2.46 µC charge is located at y = -1.40 cm. (a) Find the total electric potential at the origin. (b) Find the total electric potential at the point having coordi..
Potential energy of a not obeing Hooke's law spring is given by the equation U(x)=5.00(J/m)x - 2.00(J/m3)x3, What is the expression for the restoring force of the spring
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