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1. Estimate the wind force on your hand when you hold it out of your car window while driving 55 mph. Repeat your calculations if you were to hold your hand out of the window of an airplane flying 550 mph.
2. Estimate the energy that a runner expends to overcome aerodynamic drag while running a complete marathon race. This expenditure of energy is equivalent to climbing a hill of what height? List all assumptions and show all calculations.
A space probe is fired as a projectile from the Earth's surface with an initial speed of 1.34 x 104 m/s. What will its speed be when it is very far from the Earth
An AM radio station broadcasts isotropic ally (equally in all directions) with an average power of 3.20 kW. A dipole receiving antenna 65.0 cm long is at a location 4.00 miles from the transmitter. Calculate the amplitude of the emf that is induced b..
Explore one of the most common uses of BJTs: the amplification of small AC signals. We will study two of its most common configurations
A bicycle has wheels with a diameter of 0.67m. It accelerates uniformly and the rate of rotation of its wheels increases from 191 rpm to 260 rpm in a time of 21.70 s. Find the linear acceleration of the bicycle.
a 98-g piece of copper is heated in a furnace to a temperature tc. the copper is then inserted into a 150-g copper
A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate how high it goes and how long it is on the air before it comes back to his hand
grass clippings are found to have an average length of 3.8cm when a lawn is moved 10 days after the previous mowing.
Four point charges have the same magnitude of 2.4 x ten-12C and are fixed to the corners of a square 4.0 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the ce..
Estimate the electric field at a point 2.40 cm perpendicular to the midpoint of a uniformly charged 2 m-long thin wire carrying a total charge of 4.10 microC.
Units of km
Four identical point charges of +3.0 µC are located in air at the four corners of a square that is 40 centimeter on a side. Evaluate the force on any one of the charges
A driver makes 2.5 revolutions on the wayfrom a 10m high platform to the water. Assuming zero intialvertical velocity, find the average angular velocity during the dive
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