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You drive on Interstate 10 from San Antonio to Houston, half the time at 50 km/h and the other half at 88 km/h. On the way back you travel half the distance at 50 km/h and the other half at 88 km/h. (a) What is your average speed from San Antonio to Houston? (c) What is your average speed for the entire trip? (d) What is your average velocity for the entire trip?
A 984-kg satellite orbits the Earth at a constant altitude of 106-km. What is the change in the system's potential energy
At a certain distance from a charged particle, the magnitude of the electric field is 502 V/m and the electric potential is -3.40 kV. What is the distance to the particle
A device has a 100 g wooden shuttle that is pulled horizontally along a square frictionless wooden rail by an elastic band. find the magnitude of the initial acceleration of the shuttle
A motorist speeds horizontally of a 50.0 meter high cliff. If the motorist wants to land on level ground below 90.0 m form the base of the cliff. how fast must he motorcycle leave the cliff top to make this landing
A police car has a 1000Hz siren. It is traveling at 35m/s on a day when the speed of sounds through air is 350m/s. What change of frequency does the observer hear
An object of mass b has a speed that changes with distance d according to v = bx^-n. What is the force as a function of d? What is the position as a function of time d(t=0)=d(initial).
The distance between atoms in a solid is typically around 2.0 x 10-10 m What is the wavelength of an electron with a kinetic energy of 110 eV
What is the magnitude of the electric field 19.7 cm directly above an isolated 3.25×10^?5 C charge? What is the direction of the electric field? Downward or upward?
The electric field has been measured to be horizontal and to the right everywhere on the closed box. All over the left side of the box E1 = 120 V/m, and all over the right, slanting, side of the box E2 = 250 V/m. On the top the average field is E3..
A block (mass = 2.0 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.1 10-3 kg · m2), Find the angular acceleration of the pulley
The barrel of a compound microscope is 13.0 cm in length. The specimen will be mounted 1.00 cm from the objective, Determine the focal length of the objective lens
A 7.80-g bullet moving at 640 m/s penetrates a tree trunk to a depth of 6.1 cm. find the average frictional force that stops the bullet
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