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Driving along a crowded freeway, you noticethat it takes a time t to go from one mile marker to the next. When you increase your speed by 5.5 mi/h, the time to go onemile decreases by 13 s. What was your original speed?
-------mi/h
A bowling ball (mass = 7.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.36 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 720 N person climb before the ladder begins to slip?
You are applying a anti reflecting coating to your plane. You don't want to be seen by radar which uses 'light' of wavelength 2cm. determine the minimum thickness of this coating
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.3×106N , one an angle 12? west of north, What is the total work they do on the supertanker
You stand on a frictionless platform that is rotating with an angular speed of 7.2 rev/s. What is the change in kinetic energy of the system
A speed skater moving across frictionless ice at 8.80 hits a 4.20-m-wide patch of rough ice. What is her acceleration on the rough ice
1000 kg of seawater at 17.5 C and salinity of 3 percent is mixed with 500 kg of pure water with initial temperature 5 C, Determine the final temp C and salinity % of the mixture?
A batted baseball leaves the bat at an angle of (34.0 Degrees) above the horizontal, How high does the ball rise above the point where it struck the bat
1. when a charged particle moves at an angle of 15deg with respect to a magnetic field it experiences a magnetic force
a long solenoid with 60 turns of wire per centimeter carries a current of 0.11 a . the wire that makes up the solenoid
A satellite with mass 2200kg is initially in a circular orbit a distance 325km above the earth's surface. Due to air drag, the satellite's altitude decreases to 250km. Calculate the change in gravitational potential energy
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
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