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Questions0
• ### A point charge q1 is concentric with two spherical conducting thick shells. The smaller spherical conducting shell has a net ?

b) What is the charge on the outer surface of the

smaller spherical conducting shell?

c)What is the charge on the inner surface of the

larger spherical conducting shell?

d)What is the charge on the outer surface of the

larger spherical conducting shell?

• ### A point charge q1 is concentric with two spherical conducting thick shells. The smaller spherical conducting shell has a net ?

b) What is the charge on the outer surface of the

smaller spherical conducting shell?

c)What is the charge on the inner surface of the

larger spherical conducting shell?

d)What is the charge on the outer surface of the

larger spherical conducting shell?

• ### A point charge of 2.5 µC is located at the center of a spherical shell of radius 28 cm, which has a charge −2.5 µC uniformly ?

A point charge of 2.5 µC is located at the

center of a spherical shell of radius 28 cm,

which has a charge −2.5 µC uniformly distributed on its surface. Find the electric field

for all points outside the spherical shell. The

Coulomb constant is 8.98755 × 109 N m2

/C

2

.

Find the electric field for a point inside the

shell a distance 12 cm from the center.

Physics3 days ago
• ### A conducting spherical shell having an inner radius of 4.6 cm and outer radius of 6 cm carries a net charge of 4.4 µC. A conducting sphere ?

A conducting spherical shell having an inner

carries a net charge of 4.4 µC. A conducting

sphere is placed at the center of this shell

having a radius of 0.7 cm carrying a net charge

of 1.2 µC.

Determine the surface charge density on the

inner surface of the shell.

.

Physics3 days ago
• ### A solid sphere of radius 28 cm has a total positive charge of 40.2 µC uniformly distributed?

a)A solid sphere of radius 28 cm has a total positive charge of 40.2 µC uniformly distributed

throughout its volume.

Calculate the magnitude of the electric field

at the center of the sphere.

b)

Calculate the magnitude of the electric field

7 cm from the center of the sphere.

c)

Calculate the magnitude of the electric field

28 cm from the center of the sphere.

d)

Calculate the magnitude of the electric field

52.6 cm from the center of the sphere.

Physics3 days ago
• ### A rod 12.4 cm long is uniformly charged and has a total charge of −29.9 µC. Find the magnitude of the electric field along the axis of the ?

A rod 12.4 cm long is uniformly charged and

has a total charge of −29.9 µC.

Find the magnitude of the electric field

along the axis of the rod at a point 14.4644 cm

from the center of the rod. The Coulomb constant is 8.98755 × 109 N · m2

/C

2

.

• ### A particle whose mass is 3 kg moves in xyplane with a constant speed of 8 m/s in the positive x-direction along y = 5 m. ?

A particle whose mass is 3 kg moves in xyplane with a constant speed of 8 m/s in the positive x-direction along y = 5 m. Find the magnitude of its angular momentum relative to the point (x0,y0), where x0 = 2 m and y0 = 11 m. Answer in units of kgm2/s.

• ### A ladder with a length of 10.0 m and weight of 562.0 N rests against a frictionless wall, making an angle of 55.0◦ with the horizontal. ?

a) A ladder with a length of 10.0 m and weight of 562.0 N rests against a frictionless wall, making an angle of 55.0◦ with the horizontal. Find the horizontal force exerted on the base of the ladder by Earth when a ﬁreﬁghter weighing 819.0 N is 3.97 m from the bottom of the ladder. Answer in units of N.

b) Find the vertical force exerted on the base of the ladder by Earth. Answer in units of N.

c) If the ladder is just on the verge of slipping when the ﬁreﬁghter is 7.21 m up, what is the coeﬃcient of staticfriction between the ladder and the ground?

• ### A 0.101 kg meter stick is supported at its 40 cm mark by a string attached to the ceiling. A 0.609 kg object hangs vertically from ?

a) A 0.101 kg meter stick is supported at its 40 cm mark by a string attached to the ceiling. A 0.609 kg object hangs vertically from the 7.39 cm mark. A second mass is attached at another mark to keep it horizontal and in rotational and translational equilibrium. If the tension in the string attached to the ceiling is 16.7 N, ﬁnd the value of the second mass. The acceleration due to gravity is 9.8 m/s2 . Answer in units of kg.

b) Find the mark at which the second mass is attached. Answer in units of cm.

• ### A 7.9 m, 231 kg uniform ladder rests against a smooth wall. The coeﬃcient of static friction between the ladder and the ground is 0.527, ?

A 7.9 m, 231 kg uniform ladder rests against a smooth wall. The coeﬃcient of static friction between the ladder and the ground is 0.527, and the ladder makes a 31.7◦ angle with the ground. How far up the ladder can a 924 kg person climb before the ladder begins to slip? The acceleration of gravity is 9.8 m/s2 . Answer in units of m.

• ### A uniform, horizontal beam of length 16 m and mass 61 kg is pivoted at the wall, with its far end supported by a cable that makes an angle?

A uniform, horizontal beam of length 16 m and mass 61 kg is pivoted at the wall, with its far end supported by a cable that makes an angle of 39◦ with the horizontal. If a person of mass 53 kg stands 14 m from the pivot, what is the tension in the cable? The acceleration of gravity is 9.8 m/s2 . Answer in units of kN.

• ### A uniform rod pivoted at one end point O is free to swing in a vertical plane in a gravitational ﬁeld, held in equilibrium by a force ?

A uniform rod pivoted at one end point O is free to swing in a vertical plane in a gravitational ﬁeld, held in equilibrium by a force at its other end.

1. Fx cosθ − Rx sinθ = 0

2. −Rx + Fx = 0

3. Fx = 0

4. Rx − Fx sinθ = 0

5. Rx − Fx cosθ = 0

010 (part 2 of 3) 10.0 points What is the condition for translational equilibrium along the vertical y direction?

1. W − Ry + Fy = 0

2. Ry + Fy − W = 0

3. Ry + Fy = 0

4. Ry sinθ + Fy sinθ − W cosθ = 0

5. Ry − Fy + W = 0

011 (part 3 of 3) 10.0 points Taking the origin (point O) as the pivot point, what is the condition for rotational equilibrium?

Physics3 months ago
• ### Consider an extended object (not a point), with forces ~ F acting on it, producing torques ~τ. Is it possible for a situationto?

Consider an extended object (not a point), with forces ~ F acting on it, producing torques ~τ. Is it possible for a situationto exist in which the net force acting on the object (the net force is the sum of all the individual forces acting on the object) isequal to zeroX~ F = 0 while the net torque about any axis (the net torque is the sum of all the torques acting on the object) is not equal to zeroX~τ 6= 0?

1. No.

2. Yes

Is it possible for a situation to exist in which the net torque acting on the object is zero X~τ = 0while the net force acting on the object is not equal to zeroX~ F 6= 0? 1. Yes.

2. No.

• ### Use Green's Theorem to evaluate       F · dr.    C   (Check the orientation of the curve before applying the theorem.)   F(x, y) =  ?

Use Green's Theorem to evaluate

F · dr. C

(Check the orientation of the curve before applying the theorem.)

F(x, y) =  y cos(x) − xy sin(x), xy + x cos(x)

, C is the triangle from (0, 0) to (0, 8) to (2, 0) to (0, 0)

Mathematics3 months ago
• ### 5z2 = 2x2 + 2y2?

Write the equation in spherical coordinates.

(a)

5z^2 = 2x^2 + 2y^2

• ### At time   t = 1,  a particle is located at position   (x, y) = (5, 3).  If it moves in the velocity field  ?

At time

t = 1,

a particle is located at position

(x, y) = (5, 3).

If it moves in the velocity field

F(x, y) =  (xy − 1, y2 − 9 )

find its approximate location at time

t = 1.02

• ### Consider the setup shown below. The blocks have masses 8.4 kg and 25 kg. The pulley has mass 6.1 kg, and is a uniform disc with ?

Consider the setup shown below. The blocks have masses 8.4 kg ( on the ramp) and 25 kg.(vertically hanged)  The pulley has mass 6.1 kg, and is a uniform disc with radius 0.17 m. Assume the pulley to be frictionless, but the coeﬃcient of friction between the block and the surface is 0.27.

What is the acceleration of the blocks? Assume the 25 kg mass is descending with acceleration a. The moment of inertia of the disk is 1 2 M R2 and the acceleration of gravity is 9.8 m/s2 . Answer in units of m/s2. theta=31

• ### A 104 N sphere 0.29 m in radius starts from rest and rolls (without slipping) 8 m down a ramp that is inclined at 43◦ with the horizontal.?

A 104 N sphere 0.29 m in radius starts from rest and rolls (without slipping) 8 m down a ramp that is inclined at 43◦ with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? The acceleration of gravity is 9.8 m/s2 . Answer in units of rad/s