Physics

Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as ...

Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as ...

Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as big and upright, what is the focal length of the mirror?
A) 10 cm
B) -40 cm
C) -50 cm
D) 40 cm
E) 50 cm

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Chery   3211   35 Replies

Ivan Reyes1

A uniform solid cylindrical log begins rolling without slipping down a ramp that rises 28.0° above ...

A uniform solid cylindrical log begins rolling without slipping down a ramp that rises 28.0° above ...

A uniform solid cylindrical log begins rolling without slipping down a ramp that rises 28.0° above the horizontal. After it has rolled 4.20 m along the ramp, what is the magnitude of the linear acceleration of its center of mass?
A) 9.80 m/s2

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bewley   1837   36 Replies

Arthur Kim

Four 2.0-µC point are at the corners of a rectangle with sides of length 3.0 cm and 4.0 cm. What ...

Four 2.0-µC point are at the corners of a rectangle with sides of length 3.0 cm and 4.0 cm. What ...

Four 2.0-µC point are at the corners of a rectangle with sides of length 3.0 cm and 4.0 cm.  What is the electric potential (relative to infinity) at the midpoint of the rectangle? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)
A) 1.3 MV
B) 2.9 M

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Chery   2358   36 Replies

Laziest Alias

A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude F. ...

A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude F. ...

[html]A forklift pushes a 100-kg crate, starting from rest, with a horizontal force of magnitude F. The graph in the figure shows the x component of this force as a fun

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Pd96   4981   36 Replies

Jesse Bruzan

Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting ...

Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting ...

Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting space station, they accelerate toward each other at 2.00 cm/s2. What is the mass of each of them? (G = 6.67 × 10-11 N ∙ m2/kg2)

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Pd96   3848   37 Replies

Neil Reddy

A rotating flywheel can be used as a method to store energy. If it has 2.00 106 J of kinetic energy ...

A rotating flywheel can be used as a method to store energy. If it has 2.00 106 J of kinetic energy ...

A rotating flywheel can be used as a method to store energy. If it has 2.00  106 J of kinetic energy when rotating at 400 rad/s, and if a frictional torque of 4.00 N m acts on the system, in what interval of time would the flywheel come to rest?

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nevinjoshy2001   2623   38 Replies

AlexJ98

A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with ...

A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with ...

A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of -2.0 m/s.  What is the velocity of the  yellow ball after the collision?
A) zero
B) +3.0 m/s
C) -2.0 m/s

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Brelou   1556   41 Replies

Mahmoud Kassab

As shown in the figure, three small charges are equally spaced on the arc of a circle that is ...

As shown in the figure, three small charges are equally spaced on the arc of a circle that is ...

As shown in the figure, three small charges are equally spaced on the arc of a circle that is centered at the charge Q, where Q = +23 nC and all the other quantities are accurate to two significant figures. What is the magnitude of the net electric f

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Chery   3593   45 Replies

Kane Dacier

(a) What is Coulomb's Law? (b) Find the net electrostatic force on the charge labeled

(a) What is Coulomb's Law? (b) Find the net electrostatic force on the charge labeled

1) (a) What is Coulomb's Law?

(b) Find the net electrostatic force on the charge labeled \(P\) in figure 1.

Take \(a = 55cm\).

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tosha.garza   3278   52 Replies

Tasvir Hasnain 2122465642

An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km ...

An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km ...

An auto accelerates forward from 7.0 m/s at a uniform 0.71 m/s2. It travels a distance of 1.033 km while accelerating.
(a) How fast is the auto moving just as it is traveled the 1.033 km?
(b) How many seconds did it take to travel the 1.033

12...910

Pd96   5390   139 Replies

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