Getting used to vectors with this problem.

Three vectors have the same length (L) and form an equilateral triangle. Find the magnitude and direction of the vectors: (a)A+B (b)A-B (c)A+B+C (d)A+B-C. Please see attachment below for figure.

Simple problem to become familiar with vectors. Attachments in PDF format.

Two vectors A and B have the same length A and are at right angles. What is the length of the vector A + 2B?

A 3 dimension vector problem with displacement. Attachments in PDF format.

A cosmic ray plows into Earth's upper atmosphere, liberating a shower of subatomic particles. One of these particles moves downward 3.2 km, then undergoes a collision after which it moves 1.6 km at 27 deg. northward of the vertical. It then undergoes another collision that sends it moving horizontally eastward for 2.1 km befor ...continues

Velocity problem involving orbits, displacement and circumference. Attachments in PDF format.

Taking Earth's orbit to be a circle of radius , determine the speed of Earth's orbital motion in meters per second.

Using differentiation to describe the motion of an object launched upwards. Attachments in PDF format.

Questions are taken from the course book 'Physics with modern physics', Richard Wolfson & J. M. Pasachoff. A model rocket is launched straight upward; its altitude as a function of time is given by y = bt-ct^2, where b=68 m/s, c=4.9 m/s, t is the time in seconds, and y is in meters. (a) Use differentiation to find a ge ...continues

Einstein formula for energy-mass conversion.

Solar energy reaches the earth at a rate of about 1400 W/m^2 of surface perpendicular to the direction to the sun. By how much does the mass of sun decrease in each second?

Angular momentum quantization of electrons in a hydrogen atom.

Show that angular momentum quantization of an electron in a hydrogen atom is the necessary consequence of de Broglie's matter wave concept.

Relativity : Calculating the rest mass of an electron. Solution attachment in pdf format.

The rest mass of the electron is 9.11 x 10 ^-31 kg. In a particle accelerator, it has a speed of 0.900c. What is its mass?

Calculating moles and molecular mass in a gas law problem.

A steel bottle of 4.00 liters, initially evacuated, is filled with 4.00 grams of a pure gas. The bottle has an absolute pressure of 1.5375 Standard Atmospheres when the temperature is 300 Kelvin. R=0.0820 liter atm/mole K. 1) How many moles of gas does the bottle contain? 2) What's the molecular weight (in grams) of the m ...continues

Working with pressure and Dalton's Atomic Theory.

Hydrogen gas is contained in a one-liter vessel at "STP"(0 degrees Celsius and 1 Std. Atm.). Flourine gas is contained in a second one-liter vessel at the same conditions of temperature and pressure. Then the two gases are forced into the same one-liter vessel, find: 1) The pressure in this vessel before reaction occurs (ba ...continues