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A baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 36.29 m/s in the +x direction. The batter imparts an impulse of -9.59 to the ball so that the ball returns along the
Regulation tennis balls have a mass of 57.5 g. When dropped from a height of 2.69 m they must rebound to a height of 1.92 m to be acceptable for play. What is the loss in kinetic energy when these b
A grinding wheel is in the form of a uniform solid disk of radius 6.96 cm and mass 2.04 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.610 N ·
A force of 5.0{\rm N} is required to stretch a certain spring by 1.5{\rm cm} . A. How far must this spring be stretched for its potential energy to be 0.025{\rm J} ?
The braking distance of a car is 31m. If the speed of the car is increased by 40%, what is the car's new braking distance? (Assume the acceleration of the car is constant and independent of its init
Assume the mass of the object remains constant. (a) If the Kinetic Energy of an object changes by 1/3, by what factor has its speed changed? (b) If the speed is changed 1/3, by what factor does its
Indiana Jones is pushing back a 290 kg box of treasure which slides 4.6 m down a 27° incline and kept from accelerating. The effective coefficient of kinetic friction is 0.34 (a) Calculate the
(a) You throw the same stone with the same initial conditions but instead you do this on a another planet with a mass 4 times the mass of the earth. With what factor will x change?
(a) Find the magnitude of the acceleration of the red ball. (b) If r is 3.5 times larger, with what factor will the acceleration a change? (c) If the mass of the black ball is 50 times larger, with
Find force acting upon negative charge. Please show detailed step by step approach to solving this problem and include calculations.
A single-turn wire loop 10cm in diameter carries a 8.0A current. It experiences a torque of 2.4×10-2Nm2 when the normal to the loop plane makes a 37 degree angle with a uniform magnetic field. W
Although the actual currents are rather complicated, we can gain a rough understanding of their magnitude if we model them as a long, straight wire. if the surface of the chest is 5.0 cm from this c
A horizontal rod 0.200 m long carries a current through a uniform horizontal magnetic field of magnitude 0.067 T that points perpendicular to the rod. If the magnitude force on this rod is measured
In a cloud chamber experiment, a proton enters a uniform 0.250 T magnetic field directed perpendiular to its motion. You measure the proton's path on a photograph and find that it follows a circular
The ball and bat are in contact for 1.85 Find the horizontal component of the average force on the ball. Take the x-direction to be positive to the right.
(a) Find the magnitude and direction of the force this magnetic field exerts on the proton. (b) If you can vary the direction of the proton's velocity, find the magnitude of the maximum and minimum
At a given instant, a particle with a mass of 5.00 x 10-3 kg and a charge of 3.50 x 10-8 C has a velocity with a magnitude of 2.00 x 105 m/s in the +y direction. It is moving in a uniform magnetic f
What are (a) the magnitude and direction of the magnetic force on the particle and (b) its resulting acceleration?
A proton traveling at 3.60 km/s suddenly enters a uniform magnetic field of 0.750. T, traveling at an angle of 55.0 degrees with the field lines (a) Find the magnitude and direction of the force thi
1) What are interference and diffraction? Under what circumstances do they occur? 2) Light from a helium-neon laser is shined on a slit of width .02 mm. Describe qualitatively the pattern of light s
The microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 3.88 × 10-14 J/m3. What is the rms value of the electric field of this radiation?
A stationary particle of charge q = 2.6 × 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 2.4 × 103 W/m2. Determine the maximum magnitude of the (a) electri
An electromagnetic wave strikes a 1.91-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 9.42 × 10-4 T. How long does it take for the wave to
What is the electric field strength at the midpoint between the two spheres? in Newtons/Coulomb
What is the speed of the block when it has moved a distance of 0.0200 from its initial position? (At this point the spring is compressed 0.0180 .)