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Two positive point charges are a fixed distance apart. The sum of their charges is Qt. what charge must each have in order to (a) maximize the electric force between them, and (b) minimize it?
A skateboarder, with an initial speed of 2.1 m/s, rolls virtually friction free down a straight incline of length 20 m in 3.2 s. A skateboarder, with an initial speed of 2.1 m/s, rolls virtually fri
What is the y-component of the force in newtons on the astronaut and his space suit during a jump on the Moon? Show your calculation. Does the force act upward or downward?
A 2.0-cm-tall object is 20 cm to the left of a lens with a focal lenght of 10 cm. A second lens with a focal lenght of 5 cm is 30 cm to the right of the first lens. Calculate the image position and
Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant speed. How much force (directed parallel to the hill) must be applied to the bicycle
A 2.67-F and a 4.20-F capacitor are connected in series across a 25.0-V battery. A 8.24-F capacitor is then connected in parallel across the 2.67-F capacitor. Determine the voltage across the 8.24-F
Assuming that an axon can be treated like a parallel plate capacitor with a plate area of 6.50 x 10^-6 m2, what is its capacitance?
(a) What is the strength of the electric field generated by the proton at the Bohr-radius distance? (b) In what direction does the field point?
An ammonia molecule (NH3) has a permanent electric dipole moment 5.0 * 10^-30 Cm. A proton is 1.8nm from the molecule in the plane that bisects the dipole. What is the electric force of the molecule
During a one-hour trip, a small boat travels 80.0 km north and then travels 60.0 km east. What is the boat's average speed during the one-hour trip?
At the 18th green of the U. S. Open you need to make a 20.5ft putt to win the tournament. When you hit the ball, giving it an initial speed of 1.47m/s , it stops 5.40ft short of the hole. Assuming t
Approximately 0.1 of the bacteria in an adult human's intestines are Escherichia coli. These bacteria have been observed to move with speeds up to 15 and maximum accelerations of 166 . Suppose an E
Carbon monoxide is a gas at 0 °C and a pressure of 1.06 × 105 Pa. It is a diatomic gas, each of its molecules consisting of one carbon atom (atomic mass = 12.0 u) and one oxygen atom (atom
The current in an incandescent lamp is 0.5A when connected to a 120-V circuit, and 0.2 A when connected to a 10-V source. Does the resistance of the lamp change in these cases? Explain your answer a
The uniform electric field between the two plates of a capacitor is 120 N/ and the potential difference between plates is Va-Vb = 32V. a) The magnitude of the electric force on a charge -2.0 X 10^-1
A parallel-plate capacitor is connected to a 12.0-V battery. The area on each plate is 16 cm^2 and the spacing between the plates is 0.12mm The space between the plates is filled with paper of diele
At a time = 3.30 , a point on the rim of a wheel with a radius of 0.180 has a tangential speed of 55.0 as the wheel slows down with a tangential acceleration of constant magnitude 10.3 . A) Calcula
Define velocity and acceleration in terms of position and time. differentiate between the instantaneous quantities and the average quantities.
Oppositely charged parallel plates are separated by 5.32 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field strength between the plates?
A football is punted with an initial velocity of 26.1 m/s and an initial angle of 53.1o. What is its hang time (the time until it hits the ground again)?
Two 1.0 kg masses are 2.0 m apart on a frictionless table. Each has 1.0 uC of charge. 1. What is the magnitude of the electric force on one of the masses?
A 30.0 W lightbulb is 19.0 percent efficient. This means that 19.0 percent of the electric energy is converted to light energy. (a) How many joules does the lightbulb convert into light each minute it
Determine the magnitude of the electric field along the axis of the rod at a point 53.3079cm from the center of the rod. The Coulomb constant is 8.98755*10^9Nm^2/C^2. Answer in units of N/C.
Antartica is roughly semicircular with a radius of 2000 km. The average thickness of its ice cover is 3000 m. How many cubic centimeters of ice does Antartica contain? (Ignore the curvature of the E
An object is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2. What is the maximum height reached by the object?