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Get college assignment help at uniessay writers how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?

A string under a tension of 68 N is used to whirl a rock in a horizontal circle of radius 3.4 m at a speed of 30.12 m/s. The string is pulled in, and the speed of the rock increases. When the string is 1.009 m long and the speed of the rock is 59.8 m/s, the string breaks. What is the breaking strength of the string? Answer in units of N.

A bowling ball (mass = 7.9 kg, radius = 0.11 m) and a billiard ball (mass = 0.39 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

A locomotive is pulling 17 freight cars, each of which is loaded with roughly the same weight. The mass of each can be taken to be 37,000 . If the train is accelerating at on a level track, what is the tension in the coupling between the second and third cars? The car nearest the locomotive is counted as the first.

calculate the wavelength associated with a man (mass 70 kg)running with a volicity of 5m-1 and an electron (mass 9.1*10-31 kg)travilling with a volicity of 1ms-1 would you expect to see the wave -like properties of the man or the electron and,if so under what circumstances?

A 48.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5 . Biometric measurements indicate that each hand typically makes up about 1.25 of body weight. What horizontal force must her wrist exert on her hand?

Sam, whose mass is 65.0 , takes off down a 54.0 high, 12.0 slope on his jet-powered skis. The skis have a thrust of 190 . Sam’s speed at the bottom is 40.0 .

What phase difference between two identical traveling waves, moving in the same direction along a stretched string, results in the combined wave having an amplitude 1.50 times that of the common amplitude of the two combining waves? Express your answer in (a) degrees, (b) radians, and (c) wavelengths

The arm in the figure below weighs 37.0 N. The force of gravity acting on the arm acts through point A. Determine the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.

Four particles with masses m1 = 10 kg, m2 = 30 kg, m3 = 6 kg, and m4 = 40 kg sit on a very light (massless) metal sheet and are arranged as shown below. Find the moment of inertia of this system with the pivot at the following point. (Assume the rotation axis is parallel to the z direction, perpendicular to the plane of the drawing)

Get college assignment help at uniessay writers a spacecraft is on a journey to the moon. the masses of the earth and moon are, respectively, 5.98 x 10^24kg and 7.35 x 10^22kg. the distance between the centers of the earth and the moon is 3.85 x 10^8m. at what point, as measured from the center of the earth, does the gravitational force exerted on the craft by the earth balance the gravitational force exerted by the moon? this point lies on a lie between the centers of the earth and the moon.

A 3.5 block of wood sits on a table. A 3.0 bullet, fired horizontally at a speed of 510 , goes completely through the block, emerging at a speed of 220 .

A ship maneuvers to within 2.46×103 m of an island’s 1.79×103 m high mountain peak and fires a projectile at an enemy ship 6.19 × 102 m on the other side of the peak, as illustrated. The ship shoots the projectile with an initial velocity of 2.52×102 m/s at an angle of 72.0◦. The acceleration of gravity is 9.81 m/s2 . How close to the enemy ship does the projectile land? Answer in units of m. How close (vertically) does the projectile come to the peak? Answer in units of m.

Figure 7 shows an optical fiber that consists of a core made of flint glass (nflint=1.667) surrounded by a cladding made of crown glass (ncrown=1.523). A beam of light enters the fiber from air at an angle θ1 with respect to the normal. What is θ1 if the light strikes the core-cladding interface at the critical angle?

A 62 {rm kg} woman stands on a very light, rigid board that rests on a bathroom scale at each end, as shown in figure.

A skier is accelerating down a 30.0° hill at a = 2.50 m/s2 (Fig. 3-48).What is the vertical component of her acceleration? in m/s2 (downward) (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 320 m? in seconds

An 800 N gorilla swings from vine to vine. As the gorilla grabs a new vine, both vines form an angle of 30o with the vertical. What is the net force on each vine?

an airliner is a point A and is trying to fly to point B, which is 1000km due north of point A. The pilot wishes to reach point B in 2.5 hrs

When you pull horizontally on a crate with a force of 330 N, it slides across the floor in dynamic equilibrium. How much friction acts on the crate?

The drawing shows a skateboarder moving at 6.25 m/s along a horizontal section of a track that is slanted upward by 47.0 ° above the horizontal at its end, which is 0.761 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to whioch she rises above the end of the track.

a 0.1T uniform magnetic field is horizontal and parallel to the floor with the direction facing you. a straight segment of 1.00mm- diameter wire (copper) is parallel to the floor but perpendicular to the magnetic field(left right).what current through the wire, and in which direction(LtoR OR R to L)will allow the wire to float in the magnetic field

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November 3, 2019