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A parallel-plate air capacitor has a capacitance of 300 pF and a charge of magnitude 0.250uC on each plate. The plates are 0.700mm apart. A) What is the potential difference between plates?
A 1400- car rounds a corner of radius = 59 . The coefficient of static friction between the tires and the road is 0.80. At what speed will the force of static friction exerted on the car by the road
How much current is contained within the width of a thin ring concentric with the wire if the ring has a radial width of 10.0 µm and is at a radial distance of 1.20 mm?
A wire of Nichrome (a nickel-chromium-iron alloy commonly used in heating elements) is 1.5 m long and 1.8 mm2 in cross-sectional area. It carries a current of 4.7 A when a 2.0 V potential difference
How fast is Betty moving when the swing passes through its lowest position? Answer in units of m/s If Betty moves through the lowest point at 1.1 m/s, what is the magnitude of the work done on the s
If that same man used a tennis racket to deflect the asteroid directly back in its original direction with exact conservation of energy, what would be the velocity of the man after the collision?
Calculate the power (in horsepower) required to accelerate the car at 0.90 m/s2 when the speed is 84 km/h.
A swimmer moves through the water at an average speed of 0.29 m/s. The average drag force is 115 N. What average power is required of the swimmer?
You swing a 1.65-kg rock tied to a rope in a vertical circle of radius 0.75 m. When the rock reaches the top its speed in 3.25 m/s. A.) Calculate the acceleration of the rock at the top and show it'
A bread box is made to move along an x axis from x = 0.15 m to x = 1.20 m by a force with a magnitude given by F = e(-2x2), with x in meters and F in newtons. How much work is done on the bread box
If a quasar is 100 times more luminous than a bright galaxy (absolute magnitude about -21), what is the absolute magnitude of the quasar? If this quasar was located at the center of the our galaxy,
Two appliances are connected in parallel to a 120-V battery and draw currents I1 = 5.0 A and I2 = 3.9 A. If these appliances are instead connected in series to the same battery, what is the total cu
A vertical electric field of magnitude 2.00 x 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. A car with a rectangular size of 6.00 m by 3.00 m is traveling along a
A tennis bal is hit vertically upward with a speed of 21.0 m/sec from the roof of an office-building that is 275 ft above the ground. How long after being hit does the ball strike the ground ? (1 m
The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.10 1022 kg) hits the Earth while traveling at a speed of 1.53 x 103 m/s (as
You push with a horizontal force of 56.0 against a 25.0 box, pressing it against a rough wall to hold it in place. The coefficients of kinetic and static friction between this box and the wall are
An aluminum bar 3.74m long has a rectangular cross section 1.09cm by 5.24cm . What is its resistance? What is the length of a copper wire 1.45mm in diameter having the same resistance?
Using what you know about electricity, hypothesize about how series resistors would affect current flow. What would you expect the effective resistance of two equal resistors in series to be, compar
We know potential difference (1200V), magnitude of the magnetic field (58 mT), nucleus is travelling perpendicular to the magnetic field and that the nucleus travels in a circular path with radius o
A) Find the force his arms must exert on him during the accelerating part of the chin-up.
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. The mass of the blade is 0.508 kg and its length is 0.594 m. What is the rotational energy of the blade at its operatin
A constant horizontal pull of 8.50 N drags a box along a horizontal floor through a distance of 17.4M. (a) How much does the pull do or the box? (b) Suppose that the same pull is exerted at an angle
You push your physics book 1.50 M alone a horizontal tabletop with a horizontal push of 240 N while the opposing force of friction is 0.600 N. How much work does each of the following forces do on t
A 110-g ball collides elastically with a 350-g ball that is at rest. If the 110-g ball was traveling in the positive x-direction at 4.25 m/s before the collision, what are the velocities of the two
Assuming this is happening in a vacuum and that the ground has no net charge, what is the difference between the number of protons and the number of electrons in the second particle.