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A 7.50-nC charge is located 1.80 m from a 4.20-nC charge. (a) Find the magnitude of the electrostatic force that one particle exerts on the other. (b) Is the force attractive or repulsive?
What is the average distance traveled in Si by a 50 keV gamma before it has an interaction? What is the corresponding distance in Ge?
Assume that the net horizontal force is due to rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of rolling friction mu_r for the tire under low
The coefficients of friction for plastic on wood are μs = 0.50 and μk = 0.40. How much horizontal force would you need to apply to a 3.0-lb plastic calculator to start it moving from rest.
This particular capacitor is made from two strips of aluminum foil separated by a strip of paraffin-coated paper. Each strip of foil and paper is 6.60 cm wide. The foil is 0.005 00 mm thick, and the
According to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 29.0 µF between two points A and B. When one circuit is being cons
A 1300 kg car starts from rest at A , coasts 170m through a dip and comes to stop at B after coasting a distance d on level ground . if the rolling resistance is a constant force of 220N , determin
A certain metal with atomic mass 2.9 × 10-25kg has an interatomic bond with length 1.8 × 10-10 m and stiffness 47 N/m. What is the speed of sound in a rod made of this metal?
A spherical cavity is excised from the inside of the sphere. The cavity has radius and is centered at position , where , so that the entire cavity is contained within the larger sphere. Find the ele
A positive charge is at the center of a spherical Gaussian surface. The strength of the field due to the charge is the same everywhere on the surface of the sphere, and the flux through the sphere e
A chair of mass 14.0 kg lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 40.0 N directed at an angle of 42.0 degrees below the horizontal and t
If this speed is based on what would be safe in wet weather, estimate the radius of curvature for a curve marked 35 km/h. The coefficient of static friction of rubber on wet concrete is mu_{rm s}=0
A stone is thrown vertically upward with a speed of 11.0 {rm m/s} from the edge of a cliff 75.0 {rm m} high. How much later does it reach the bottom of the cliff? What is its speed just before hitt
Suppose that a capacitor has parallel circular plates with radius R = 75.0 mm and separation 4.1 mm. Suppose also that a sinusoidal potential difference with a maximum value of 160 V and a frequency
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 27.0 in a direction 60.0 west of north. Jane wal
Motion with a constant, nonzero acceleration is not uncommon in the world around us. Falling (or thrown) objects and cars starting and stopping approximate this type of motion. It is also the type
The power rating of a resistor is the maximum power it can safely dissipate without getting too hot. Suppose you have a set of 5.30 Omega, 10.8 Omega, and 20.1 Omega resistors, all rated at 2.40 W.
A coin is placed 12.0 {rm cm} from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 3
A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95 x 106 N. Wh
A rifle with a barrel length of 62cm fires a 11g bullet with a horizontal speed of 380m/s . The bullet strikes a block of wood and penetrates to a depth of 14cm. What resistive force (assumed to be
Identify and sketch all the external forces acting on the chair. Because the chair can be represented as a point particle of mass , draw the forces with their tails centered on the black dot in the
Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration.
Coin is placed 11.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 40.0 (revol
A certain groove in a phonograph record moves past the needle at 30 cm/s. If the wiggles in the grove are 0.1 mm apart, what is the frequency of the sound that is produced?