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A police radar has an effective range of 1.3 km, while a motorist's radar detector has a rangeof 1.8 km. The motorist is going160 km/h in a 60km/h zone when the radar detector beeps. At what rate must the motorist decelerate to avoid a speeding ticket?
What is constant acceleration
A man pushes a 42 kg crate uphill along a plane inclined at 30 degree with respect to the horizontal. find the total work on the crate by dissipative forces
A 0.60kg sphere rotates around a vertical shaft supported by 2 strings. If the tension in the upper string is 18N, calculate the tension in the lower string
A child playing tee ball hits a stationary 65 {\rm g} ball with a 300 {\rm g} bat swinging initially at 4.0 {\rm m/s}. What's the bat's post-impact speed
What focal length does the lens need. Find out the electrostatic force exerted on one sphere by the other.
Find the total capacity, total charge and the voltage across C1 and C2 given C1= 15nF and C2= 25nF are connected in parallel across a 200 volt supply
A guitar string of diameter 0.6 mm and length 0.74 m is subject to a tension of 140 N. what is Young's modulus of the string
Imagine a truck with a mass of 30 metric tons (t) (1 t=1,000 kg) barrelling down a highway at a speed of 50 mi/h. What is the truck's momentum in kilograms
A commercial airliner is undergoing its initial ascent while the pilot maintains a cabin environment of T = 23 C, r = 0.35, and p = 880 hPa. At the 670 hPa level an exit door ruptures and cabin pressure rapidly decompresses. Will clouds form in the c..
Concrete is pumped from a cement mixer to the place it is being laid, instead of being carried in wheelbarrows. Calculate the resistance of the hose
A 630-Hz sound travels through pure hydrogen. What is the speed of sound in hydrogen
During an adiabatic process, the temperature of 3.62mol of a monatomic ideal gas drops from 460C to 215C a) Find the work done by the gas. b)Find the heat the gas exchanges with its surroundings. c)Find the change in its internal energy.
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