Particles in orbit

The solar wind is a continuous stream of particles, mostly protons and electrons, moving away from the Sun. When the particles encounter Earth's upper atmosphere, they are moving at speeds of several hundred km/s. If such a particle reaches Earth's upper atmosphere with a speed of 92 km/s, how fast was it moving when it cross ...continues

Gravitational acceleration of a spacecraft in orbit around Jupiter.

A spacecraft is in orbit around Jupiter. The readius of the orbit is 3.0 times the radius of Jupiter (RJupiter = 71,500 km). The gravitational acceleration at the surface of Jupiter (the surface is defined as the above radius) is 23 m/s2. Without using any other information about Jupiter, what is the period of the spacecraft' ...continues

Concepts clarification

Clarify: uniform Circular Motion Potential Energry Work Kinetic Energy Conservation of Engery Work by External Forces Newtons Laws 1,2,3 I need your help on what are the main things i would need to know from those areas in-order to solve relating problems

how to make a balloon in a jet balloon lab make a return trip

I take principles of Physics and for the last two days I have been trying to do a lab where I have to develope a design with 6 yards of strings conected to two poles and pulled taught, as many balloons as necessary, straws, tape, and paper clips. The set up of the lab is a sting stretched taught across the room in the first lab ...continues

Fuel Economy and Second Law of Thermodynamics

The Otto-cycle of a certain car has a compression ratio r=8.5. The fuel economy rating of this car is 25 miles per gallon at 105km/h. Gasoline has a heat of combustion of 4.60x10^7J/kg, and its density is 740kg/m^3.

a> At 105km/h, what is the rate of gasoline consumption in L/h?

b> What is the theoretical eff ...continues

Pulleys

From the diagram determine (a) frictional force (b) acceleration of the system (c) tension in the string (d) net force acting on the 2 dg block. The coefficient of friction is 0.4.

Pulley system

A pulley with one end connected to a 300 gm block and the other connected to an unknown weight(M) has a negligible friction. The tension in the string is given as 2 nt. Determine(a)the acceleration of the 300 gm block. (b) the force acting on the 300 gm block. (c) weight of M in newtons (d) value of the unknown mass M in gms.

acceleration and projectile motion

1) A car starts from rest with an acceleration of 6 m/sec2. After attaining a speed of 30 m/sec it maintains a constant speed. Find (a) the distance traveled in 10 seconds and (b) average speed during in the first 10 seconds. 2)A projectile is fired from the ground with an unknown speed at an angle fo 30 degrees. Its range ...continues

Impulse and Momentum

A small steel ball moving with speed v0 in the positive x-direction makes a perfectly elastic noncentral collision with an identical ball originally at rest. After impact, the first ball moves with speed v1 in the first quadrant at an angle theta1 with the x-axis, and the second moves with speed v2 in the fourth quadrant at an ...continues

x, y-components and magnitude

two cables are supporting a weight of 95 lbs. the force in the cable B is 50 lbs at and angle of 60 degrees. (the two cables come together at an angle of 90 degrees) Determine (a) X-component of vector B. (b) y-component of force A. (c)magnitude of force in cable A. Please explain carefully how to find these. Thanks