371 Answered Questions for the topic physics B

Physics B Physics Physics C

05/23/20

capacitance series

Initially, a single capacitance C1 is wired to a battery. Then capacitanceC2 is added in series Are (a) the potential differenceacross C1 and (b) the charge q1 on C1 now more than, less than,... more
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Physics B Physics Physics C

05/12/20

please solve this:
we have a cylinder with radius a and length L and a conductivity of δ=δ"(r) find the resistivity of it please .
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Physics B

05/08/20

Optics and resulting image
If a decorative mirror has a .2m focal length and is concave and a candlestick that is 0.03m tall is placed .3m in front of the mirror... What is the position and magnification of the image for... more
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Physics B Physics Physics C

05/07/20

Physics Systems
Hello, I have attempted this question multiple times but do not know how to answer it, please help me! Can anyone attempt part B please?A 6.5kg block is at rest on top of a desk. it is connected... more
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04/27/20

how to prove this question ?
we have two charged particles on an axis(-3q and -q ) however a third charged particle can be placed at a certain point between the particles. how to prove the equilibrium is stable or unstable ?
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Physics B Physics Physics C

04/21/20

Three beads are placed along a thin rod. The first bead, of mass m1 = 29 g, is placed a distance d1 = 1.1 cm from the left end of the rod.

The second bead, of mass m2 = 11 g, is placed a distance d2 = 1.8 cm to the right of the first bead. The third bead, of mass m3 = 43 g, is placed a distance d3 = 4.5 cm to the right of the second... more
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Physics B Math Science Physics

04/21/20

Circuit problems
1) How many 60 W light bulbs could be plugged into a 110 V circuit protected by a 15A circuit breaker?2) At $0.15 per kW•h, how much will it cost (for electricity) for a family to prepare a dinner?... more
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Physics B Physics Physics C

04/10/20

The mass of the moon balan is 7.8×10^22 kg. If a 115 KG Mas experience as a gravitational force of 230 N at the moon surface what is the radius of the moon Balan?
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03/09/20

Wave Problems (help!)
1) a spring of length of 5.5 meters if held fixed at both ends and is vibrating at the third harmonic. determine the wavelength and frequency of the standing wave produced if the wave speed on the... more
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02/27/20

Circular motion Question
Kangaroo Jack is trying to catch a crane with a bola. The mass on the end of the bola is 250g and the bola makes 3 revolutions every 2 seconds with a velocity of 11 m/s. How long is the bola?
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Physics B Math Science Physics

02/26/20

Circular Motion: Vertical Loops
A stunt pilot flying an old biplane climbs in a vertical circular loop. While upside down, the force acting upward normally on the seat is 1/3 her usual weight. If the plane is traveling at that... more
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02/26/20

Circular Motion
Kangaroo Jack is trying to catch a crane with a bola. The mass on the end of the bola is 250g and the bola makes 3 revolutions every 2 seconds with a velocity of 11 m/s. How long is the bola?
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Physics B Math Science Calculus

02/23/20

physics question
a flywheel in a large factory stores energy in the form of rotational kinetic energy. assume that a flywheel is a uniform iron cylinder with a mass of 1200 kg and a radius of 2.3 m. In addition,... more
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Physics B Math Science Physics

02/21/20

Can someone do this impossible problem?
If you lift a box 60 m with a force of 120 N what is the output work? If you push the same box 200 m up a ramp to the same height with the force of 25 N what is the input work? And what is the... more
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Physics B Math Science Physics

02/21/20

What is the efficiency of the incline plane?
An incline plane requires 600 J of output work and 1200 J of input work.
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Physics B Science Physics Sat

02/21/20

How much work is done?
A box with a mass of 10kg being pulled by the force of gravity at 10 m/sec2 is lifted upward 10 meters.
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Physics B Math Science Physics

02/21/20

What is it’s M.A.?
A lever has a distance from the fulcrum to the input force of 12 meters and a distance of the fulcrum to the output force of 2 meters.
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Physics B Physics Sat Physics C

02/21/20

What is it’s M.A.?
An incline plane has length of 11 meters and a height of 3 meters.
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Physics B Math Science Physics

01/27/20

Momentum Problem
Three identical metal spheres are on a frictionless surface. The first sphere (which is positioned towards the left in relation to the other two spheres) travels at velocity v and collides... more
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01/27/20

Collisions question
1) Would an "explosion collision" be considered an inelastic or elastic collision?2) If both objects move in the same direction after colliding, would this be considered an elastic or inelastic... more
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Physics B Math Science Physics

01/27/20

Collision problem (inelastic or elastic?)
Ball X with an initial sped of 5 m/s and a mass of 3kg collides with ball "Y", which is initially at rest with a mass of 1kg. After the collision, ball "X" has a speed of 1 m/s. Is this a elastic... more
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Physics B Math Science Physics

01/24/20

Momentum problems
1) a 200 kg cannon fires a 3 kg shell forward. If the cannon recoilds at 5.1 m/s, how fast is the shell fired?2) a 2000 kg rail car traveling east at 15 m/s collides inelastically with a 500 kg car... more
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Physics B Math Science Physics

01/08/20

Force/Momentum problems
A 0.145 kg baseball is pitched at 35.0 m/s is hit on a horizontal line drive straight back at the pitcher at 50 m/s. If the contact tiem between the bat and ball is 0.02 seconds, thena) what is the... more
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Physics B Math Science Physics

01/08/20

Momentum Problems
1) How great of an impulse is needed to change the speed of an 8 kg cart from 32 m/s to 50 m/s? How many seconds would you need to apply a 10 N force in order to cause this impulse? 2) On a serve,... more
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Physics B Math Science Physics

01/08/20

Free body diagram question
How would a free body diagram look like during the push-off of ones vertical jump (that is, the jump is vertical). Would it simply be a box with Fg pointing downwards or a box with both Fg and Fn... more
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