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The tennis ball of mass 57 g which you have hung in your garage that lets you know where to stop your car so you don't crush your garbage cans is entertaining you by swinging in a vertical circle of radius 75 cm. At the bottom of its swing it has a speed of 4 m/s. What is the tension in the string at this point?
The position of a squirrel running in a park is given by r = [(0.280m/s)t+(0.0360m/s2)t2]i^+ (0.0190m/s3)t3j^. how far is the squirrel from its initial position
A van is approaching a stationary motion detector at 45 m/s. The motion detector emits ultrasonic sound waves toward the van, what is the frequency of the reflected sound measured by the detector
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter, calculate the potential difference between its feet
The temperature difference between the inside and the outside of a home on a cold winter day is 49°F. Express this difference on the Celsius scale.
The horse on a carousel is 3.7m from the central axis. How fast is a child on the horse going
A planet of mass 7*10^24 is at location m A star of mass 8*10^30 is at location m. What is the force exerted on the planet by the star ?
A proton that has a mass m and is moving at 330 m/s in the +i hat direction undergoes a head-on elastic collision with a stationary nitrogen nucleus of mass 14m. Find the velocities of the proton and the nitrogen nucleus after the collision
a rabbit runs in a straight line with a velocity of 1.3 ms for a period of time rests for 12 s and then runs again
A car is stopped at an intersection with a red light, and a biker (in a bike lane) with velocity "v" is approaching the car from behind. calculate the distance at which the biker catches the car
two parallel plates are held at potentials of 189.0 v and -98.0 v. the plates are separated by 1.19 cm. a find the
a rocket is launched vertically up with no initial velocity. propulsion is provided by the ejection of mass with
Two tuning forks are played at the similar time in a room where the velocity of sound is 340 m/s. One of them has a frequency of340 Hz and the other a frequency of 360 Hz. What is the beat frequency? What is the successive time among beats?
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