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An apple weighs 1.17 N. When you hang it from the end of a long spring of force constant 1.56 N/m and negligible mass, it bounces up and down in SHM. If you stop the bouncing and let the apple swing from side to side through a small angle, the frequency of this simple pendulum is half the bounce frequency. (Because the angle is small, the back and forth swings do not cause any appreciable change in the length of the spring.)
What is the unstretched length of the spring (i.e., without the apple attached)?
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.4 10-6 T. What is the intensity S of the wave
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 680m to be the other plate.
A child goes down a playground slide with an acceleration of 1.20 m/s2. Compute the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 32.2° below the horizontal.
A convex spherical mirror, whose focal length has a magnitude of 19.0 cm, is to form an image 12.4 cm behind the mirror. What is the magnification of the mirror
A 60.0-kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 1.00 cm, what pressure does she exert on the floor if she stands on one foot
A proton moves through a magnetic field at 25.5% of the speed of light. find the magnitude of the magnetic force acting on the proton
A placekicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, By how much does the ball clear or fall short of clearing the crossbar
A house has a floor area of 162.0 m2 and an outside wall that has an area of 40.50 m2. The earth's magnetic field here has a horizontal component of 2.550E-5 T, Determine the magnetic flux through the wall if the wall faces north
A hollow cylinder (hoop) is rolling on a horizontal surface at speed 4.3 when it reaches a 11incline. How far up the incline will it go
A horse races once around a circular track in a time of 118s, with a speed of 17 m/s. What is the radius of the track? How do you go about solving this.
If the car is now at rest and the pendulum undergoes S.H.M. would its time be shorter of longer than that calculated in (b) explain your answer.
A wheel 65 cm in diameter accelerates uniformly from 215 rpm to 390 rpm in 6.0 s. How far will a point on the edge of the wheel have traveled in this time.
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