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As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. The spacecraft's mass is 208 kg and the thrust (force) of the rocket engines is 57 N. If the speed of the spacecraft must be decreased by 133 m/s, how long must the engines be fired. (Ignore the change in mass due to the rocket engines firing).
A car is initially 4.0km south of a gas station and is moving with a constant speed of 55km/h due north. How far are the vehicles from the gas station when they pass each other
A rocket blasts off from a platform on a space station. An identical rocket blast off from free space. Considering that everything else is equal, will the two rockets have the same acceleration? define.
A 15.0 g block with a charge of +6.00 10-5 C is placed in an electric field = (3000 - 600 ) N/C. What is the electrostatic force on the block
A 13 cm × 13 cm × 13 cm box containes 0.025 mol of nitrogen at 30°C. What is the rate of collisions (collisions/s) on one wall of the box
A gass has 100 J of energy in the form of heat is transfered to a system and the system does 150 J of work, what is the change in the internal energy of the system
A cylindrical copper cable carries a current of 1090 A. There is a potential difference of 1.60 10-2 V between two points on the cable that are 0.28 m apart
A converging lens witha focal length of 12.0cm forms a virtual image 8.50mm tall, 18.0cm to the right of the lens. Determine the size of the object
While looking into a silver Christmas ornament, If your nose is only 6.25 inches from the ornament, and the diameter of the ornament is 4.85 cm, how far behind the ornament does your nose appear
Consider an equilateral triangle 12cm on a side. If a charge of 6*10^-5 C is placed at each vertex, find the force on the top charge
A particle has a charge of +2.3 ?C and moves from point A to point B, a distance of 0.12 m. Find the magnitude of the electric force that acts on the particle
At high noon, the Sun delivers 825W to each square meter of a blacktop road. If the hot asphalt loses energy only by radiation, what is its equilibrium temperature.
A bird watcher meanders through the woods, walking 0.496 km due east, 0.754 km due south, find the magnitude (in kilometers) of the bird watcher's displacement.
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