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Q. Waves moving on a lake have a speed of 2.00m/s and a distance of 1.5 m between adjacent crests. a. What is the frequency of the waves? b. What is the period of the waves?
Q. A driver wearing a seatbelt decelerates at roughly the similar rate as the car itself. Since modern cars have a "crumple zone" built into the front of the car, the car would decelerate over a distance of roughly 1.20 m. Determine net force acting on a 71{rm kg} driver who is decelerated from 22.00 m/s to rest in a distance of 1.2 m.
A toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.03m/s in a horizontal circle. If the angle the string makes with the vertical is 27°, and the tension of the string is 1N.
The coefficient of kinetic friction between block and ramp
A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks.
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
What apparent free-fall acceleration is experienced by the managers remaining on the rim assume that the average mass for each inhabitant is 65kg.
What are the direction and magnitude of the magnetic force the field exerts on the proton.
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
A 5kg steel ball strikes a wall with a speed of 8m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ..
Two violin strings are tuned to the same frequency, 294 Hz. The tension in one string is then decreased by 1.5 %. What will be the beat frequency heard when the two strings are played together.
Two students are on a balcony a distance h above the street. One student throws a ball vertically downward at a speed vi; at the same time, the other student throws a ball vertically upward at the same speed. Answer the following symbolically in t..
Find the magnitude of the acceleration for an electron in a uniform electric field with a magnitude of 122 N/C.
Assume that, as lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears. You after that stand, elevating your eyes by a height H = 1.90 m.
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