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William Tell is said to have shot an apple off his son's head with an arrow. If the arrow was shot with an initial speed of 35.0 m/s and the boy was 19.5 m away. (Assume that the arrow and apple ar
The pilot of an airplane traveling 160 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is dire
For your science fair project you need to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over 30.0 ^\circ in first order. A. How many lines per millimeter does you
Excess electrons are placed on a small lead sphere with a mass of 8.35 so that its net charge is -3.65×10^-9 . Find the number of excess electrons on the sphere.
Estimate the fraction of this power that is converted into the energy of sound waves. Assume the dimensions of the oven are 24.8 cm by 16.6 cm by 43.5 cm and the sound level is uniform over the oute
Determine (a) the period and frequency of the motion, (b) the amplitude, (c) The maximum acceleration, (d) the position, velocity and acceleration at t= 2s, and (e) Plot a position vs. time graph fo
Displacement vector points due west and has a magnitude of 1 km. Displacement vector points due south and has a magnitude of 2.4 km. Find the magnitude and direction (relative to due east) of the re
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 1.7 x 10-7 C/m2, and the plates are separated by a distance of 2.2
The earth's surface charge density (-1.0 x 10-9 C/m2) is roughly balanced by a net positive charge in the lower 10 km of the earth's atmosphere. What is the average volume charge density of this at
What would be the force on a charge of +14 microC placed at this spot?
What must have been the initial velocity of m1? Give the speed for your first answer and the compass heading for your second answer.
What is the number n of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to = 16 kHz
Two sound waves oscillate in phase with a frequency of 100 Hz to a point 5.00 m from a source and to 5.85 m from the other. Determine the difference in phase waves sound from the two sources at that
If you blow air over the top of a fairly large drinking straw you can hear a fundamental frequency due to a standing wave being set up in the straw. (a) What happens to the fundamental frequency, if
A block starts at rest and slides down a frictionless track. The acceleration of gravity is 9.81 m/s^2. It leaves the track horizontally, striking the ground 4.9 m from the end of the track. (the t
A 2 kg block is taken from a furnace where its temperature was 650 degree C and placed on a large block of ice at 0 degree C. Assuming that all the heat given up by the iron is used to melt the ice,
With what force would two copper coins, placed 0.93 m apart, repel each other? Assume that each coin contains 2.7 x 1022 copper atoms. (Hint: A neutral copper atom contains 29 protons and 29 electro
At t = 0 a particle (m = 0.771 g, q = 4.15 µC is located on the x axis at x = 18.2 cm, moving with a speed of 36.7 m/s in the positive y direction. For what value of Q (in µC) will the m
A capacitor with a charge of 5 microcoulombs has its terminals shortened by a metal wire so that the charge flows off within 2 microseconds. What is the average current flowing during that time?
A linear accelerator is operated at 700 kV to accelerate protons. What energy will the protons have when they exit the accelerator in a) eV and b) Joules. If deuterium ions are accelerated what will
Two light bulbs, one rated 50 W and a second rated 100 W are both supposed to be connected to a 110 V source of emf. Which of the following is true?
What is the magnitude of the electrostatic force between a singly charged sodium ion (Na+, of charge +e) and an adjacent singly charged chlorine ion (Cl-, of charge -e) in a salt crystal if their se
A car traveling 90 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.81 m. What was the average acceleration of the driver during the collision?
A voltmeter is used to read the potential difference accross the poles of a battery.
The electrical resistance on a long piece of wire is R. The wire is streatched to be twice as long, and because the volume doesnt change its cross-sectional area is halved. The electrical resistance