06/18/19

An apparent paradox in simple kinematics
Among the "Big Five" equations of kinematics is:Vf2 = Vi2 + 2 aΔXTaking this equation at its "face value", it would imply that when Vf = Vi the acceleration has to be 0 or the ΔX is zero. But if... more
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01/10/19

Finding magnetic field at a specific location
A long, straight wire carries a current of 2.5 μA. An electron moves parallel to the wire with a constant speed of 3.6x104 m/s at distance "d" below the wire. What is the magnitude and direction fo... more
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08/27/18

How do you draw a lenses ray diagram ?
An object 1.5 cm high is located 7.00 cm in front of a converging lens that has a focal length of 5.00 cm. Draw the ray diagram to scale. Find the image distance, image height and the magnification... more
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08/24/18

What is the speed and the total distance traveled...?
what is the speed for one of the twins to travel in the outer space to age a day while the other twin will age a 1000 years on the earth? and what is the total distance traveled?
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08/21/18

A cricket ball has mass 0.155 kg.
If the velocity of a bowled ball has a magnitude of 55.0 m/s and the batted ball's velocity is 60.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball. Find... more
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08/18/18

[PHYSICS QS] A Particle travel in a circular path of radius 0.2 m with a constant K.E of 4J. What will be the Net force?
A physics Numerical. It'll be a great of someone tell me how to solve it. Thanks!
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08/15/18

DIsplacement and Velocity
Velocity can be either positive or negative, depending on the direction of the displacement. The time interval Δt is always positive why
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08/15/18

Position Time Graph
On a position-time graph what represents velocity?
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08/10/18

What is the acting net force.
Michael rides a roller coast and enters the bottom of a dip with a radius of curvature of 8.0 m. At the bottom of the dip, he is traveling with a speed of 17 m/s. What is the net force acting on... more
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08/10/18

What is the normal acting force?
i need help with this: Judy (62 kg) is riding a roller coaster with a large loop. At the top of the loop, Judy is traveling 35 m/s. The loop has a radius of curvature of 23 m. From Judy's frame of... more
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07/22/18

When do we use given resistance/sum of resistance in series × emf
When do we use given resistance /sum of resistance in series × emf. And when do we use e=I(r+R) and v= e-ir  Secondly. For example v=ir.  If v increase do I and r both increase ? 
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07/17/18

the wheel in the simplified engine has a radius o A=0.250m and rotates with angular frequency omega=12.0 rad/s. At t=0, the piston is located at x=A. Calculate
the wheel in the simplified engine has a radius o A=0.250m and rotates with angular frequency omega=12.0 rad/s. At t=0, the piston is located at x=A. Calculate the piston's a) position, b)velocity... more
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07/15/18

Physics Question
Two point sources of a wave are 1.0mm apart. At a distance of 1.0m away, the distance between the third nodal lines either side of the central antinodal line is 3.2mm. Describe the brightness of... more
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07/05/18

Dynamics and Statics Physics Problems Help
These are five physics dynamics and statics problems that I have no clue how to do.  You someone please help me solve them. Thank you!     1. A meter stick of mass M hangs from a 1.5 meter... more
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06/29/18

If a 1200 kg car slows from 20 m/s to 12 m/s over a distance of 20 m, what is the force of friction that the brakes apply?
im practicing for a test and have no idea how to do this 
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06/24/18

Suppose a chinook salmon needs to jump a waterfall
Suppose a Chinook salmon needs to jump a waterfall that is 1.50m high. If the fish starts from a distance of 1.00 m from the base of the ledge over which the waterfall flows, find the x- and y-... more
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06/15/18

If a car covers 2/5th of the total distance with speed v1 and 3/5th distance with speed V2, then what's the average speed.
Options are - 1. v1 + v2 / 2 2. 2v1v2 / v1 + v2 3. 5v1v2 / 3v1 + v2
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05/30/18

I want step by step detailed explanation
There is a uniformly charged non conducting solid sphere made of material of dielectric constant one. If electric potential at infinity be zero, then the potential at its surface is V. If we take... more
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05/20/18

Angled electric field
A charged object of mass 0.004 kg is suspended by a string in a uniform electric field of magnitude 540000 N/C. The electric field, angled 42º above the horizontal, causes the object to be in... more
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05/16/18

physics young's modulus
A steel cable whose effective cross section is 1.20 cm2 supports a 200-kg elevator. When the elevator is at rest at the secondfloor the length of the supporting cable is 40.000 meters. What would... more
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05/23/17

You have an exciting summer job working on an oil tanker in the waters of Alaska.
You have an exciting summer job working on an oil tanker in the waters of Alaska. Your Captain knows that the ship isnear an underwater outcropping of land and wishes to avoid running into it. He... more
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05/23/17

Your artist friend is designing a kinetic sculpture and asks for your help
Your artist friend is designing a kinetic sculpture and asks for your help since she knows that you have had physics. Part ofher sculpture consists of a 6.0 kg object and a 4.0 kg object which hang... more
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05/19/17

RAY DIAGRAMS...
my question is when does a lens and mirror combination have an i3. cause there are examples in the internet that doesnt have i3 such as https://www.youtube.com/watch?v=aGHnH_4KFRE. and there are... more
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04/17/17

Gauss's Law
Consider the electric charge distribution shown in figureFormed by three small spheresAnd a larger one. The density ofCharge in the various regions of theSpace is indicated in the figure,Being ρ a... more
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04/15/17

Leg oscillation question
Consider a Tyrannosaurus which has a leg length of approximately 3m. Approximate the leg as a board. What would be such a boards period of oscillation if swinging freely about its end? I keep... more
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