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As soon as a traffic light turns green, a car speeds up from rest to 50.0 miles per hour with a constant acceleration of 9.50 mi/h•s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant acceleration of 12.5 mi/h•s. Each vehicle maintains a constant velocity after reaching its cruising speed.
(a) Compute for how long is the bicycle ahead of the car?
s
(b) Find by what maximum distance does the bicycle lead the car?
ft
A series DC circuit contains a 4mH inductor and an 80 ohm resistor in series with a 12V battery. What is the time constant for the circuit? What are the initial and final currents?
The energy given off by 300 grams of an alloy as it cools through 50 degrees Celcius raises the temperature of 300 grams of water from 30 degrees Celsius to 40 degrees Celcius.
An airplane must reach a speed of 172 mi/h to take off. If the runway is 470 m long, what is the minimum value of the acceleration that would allow the airplane to take off productively.
A planet Z has a hole bored in it at its equator, and a shaft of light from it's star goes straight down that hole to the bottom, what is the circumference and radius of planet Z
An unwary football player collides with a padded goalpost while running at a velocity of 8.50 m/s and comes to a full stop after compressing the padding and his body 0.150 m. How long does the collision last
the electron-volt ev is a unit of energy 1ev 1.602 middot10-19 j 1 mev 1.602 middot10-13 j. since the unit of
An aluminum ring needs to be placed over a cylinder steel bar. At 10.00 degrees C, Find the temperature of the ring at which it fits over the bar
The speed of sound in air is 332 m/s at 0°C. It increased 0.60 m/s for each degree above zero. compute the speed of sound at the temperature of the room.
An ideal toroidal solenoid has a cross-sectional area of 0.500 cm^2 , a mean radius of 15.0 cm , and 1600 turns. What is the self-inductance of this solenoid?
A brick is initially 7.72 cm high and an aluminum can is initially 7.73 cm high. By how much should their temperatures be raised in order for the brick and the can to have precisely the similar height?
An ideal gas expands isothermally, performing 4.1 x 103J of work in the process. Calculate the heat absorbed during this expansion
a block is being pulled over a table by a weight w10n. the block is in contact with an oil film with a viscosity of
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