Thursday

August 25, 2016
**Physics **

The mass of a string is 6 grams, and it is stretched so that its tension is 150 N. A transverse wave travelling on this string has a frequency of 160 Hz and a wavelength of 0.40 m. What is the length of this string? (ii) A chain saw has a measured sound level of 80 dB. What is...
*Wednesday, April 6, 2016 by Orla*

**PHYSICS**

A string on a violin is tuned to vibrate at a fundamental frequency of 65.0 Hz. If the tension in the string were increased by a factor of three, what would be the new fundamental frequency?
*Wednesday, April 6, 2016 by Orla*

**physics**

Use conservation of energy to determine the angular speed of the spool shown in the figure below after the 3.00 kg bucket has fallen 4.05 m, starting from rest. The light string attached to the bucket is wrapped around the spool and does not slip as it unwinds. the spool, ...
*Wednesday, April 6, 2016 by david*

**Physics**

An ac power supply with frequency 60 Hz is connected to a capacitor C=40uF. The maximum instantaneous current that passes through the circuit is 2.26A. What is the maximum voltage?
*Wednesday, April 6, 2016 by SomeoneSexy*

**Physics**

1. Does the center of gravity coincide with the fulcrum? Why? 2. why does a meter stick balance if the moments in one side equals the moment on the right side? 3. When do you solve for percent difference? Percent error?
*Wednesday, April 6, 2016 by help me please*

**physics**

!.How does work affect power with time constant? 2.how does the weight of the stair-climber affect work and power?
*Wednesday, April 6, 2016 by jerdean*

**Physics**

Please solve and answer. Need done ASAP. A speeder passes a parked police car at 35.0 m/s. The police car starts from rest with a uniform acceleration of 2.39 m/s2. (a) How much time passes before the speeder is overtaken by the police car? __ s (b) How far does the speeder ...
*Tuesday, April 5, 2016 by Cheyenne*

**Physics**

an object is dropped from rest the top of a building 19.6 m hi. calculate the a) time for the object to reach the ground and b) object's speed just before it strikes the ground
*Tuesday, April 5, 2016 by Rocio*

**physics**

A ball bounces to 34 percent of its original height. *1) What fraction of its mechanical energy is lost each time it bounces? *2) What is the coefficient of restitution of the ball-floor system? - I was able to solve part one and get an answer of .66, but part two I don't ...
*Tuesday, April 5, 2016 by David*

**physics**

A ball bounces to 34 percent of its original height. *1) What fraction of its mechanical energy is lost each time it bounces? *2) What is the coefficient of restitution of the ball-floor system? - I was able to solve part one and get an answer of .66, but part two I don't ...
*Tuesday, April 5, 2016 by David*

**Physics (light)**

A soap film is viewed in white light. If the film is much thinner than the wavelength of blue light, what is the appearance of the film? The soap film appears totally transparent because it reflects no visible light. The soap film appears blue because all others colors are ...
*Tuesday, April 5, 2016 by jacob*

**physics**

The system of small objects shown in the figure below is rotating at an angular speed of 2.0 rev/s. The objects are connected by light, flexible spokes that can be lengthened or shortened. What is the new angular speed if the spokes are shortened to 0.15 m? 1.0m x 1.0m distance.
*Tuesday, April 5, 2016 by mark*

**physics **

A meter stick is rotated about the end labeled 0.00 cm, so that the other end of the stick moves through an arc length of 6.20 cm. Through what arc length s does the 25.0-cm mark on the stick move? any help, please?
*Tuesday, April 5, 2016 by Madison Smith*

**physics**

A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the tension ...
*Tuesday, April 5, 2016 by mark*

**PHYSICS. HELP!my work **

two force of 20N and 34N act on a body in such a way that they make an angle of 35 with each other. find the resultant of the two force
*Tuesday, April 5, 2016 by shemsa *

**Physics**

A pendulum with length of 80cm was set vibrating on the moon. It takes 1.08s to travel between a point of maximum velocity to the next point of velocity. What is the period of ascillation?
*Tuesday, April 5, 2016 by Wissal*

**physics**

A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric ...
*Tuesday, April 5, 2016 by reghuir*

**physics**

an inclined plane, which slopes at 37degree is used to raise a 10 kg object to a heghit of 4m if the efficency is 80% determine a,the load (t@ke sin 37=0.6,cos 37 =0.8) b,the cofficent of kinetic friction c,the effort force
*Tuesday, April 5, 2016 by sami*

**Physics**

A block of mass 0.585 kg is placed on the end of a spring which has a stiffness of 294 N/m. It is pulled down 2.80 cm and released. What is the frequency of oscillation?
*Tuesday, April 5, 2016 by Em*

**Physics**

A block with a mass of 0.357 kg is attached to a spring of spring constant 599 N/m. It is sitting at equilibrium. You then pull the block down 4.80 cm from equilibrium and let go. What is the amplitude of the oscillation? I know A=D/F... I keep getting the wrong answer though...
*Tuesday, April 5, 2016 by Em*

**physics**

When is the kinetic energy equal to zero?
*Tuesday, April 5, 2016 by sara*

**Physics- Optics**

A double lens system is made of +35.0 cm lens (lens #1) and a - 26.0 cm lens (lens #2). Lens #1 is placed at x = 0 cm on a meter stick and lens #2 is placed at x = 30.0 cm. Where on the meter stick will the final image be formed when looking at a distant object? s2"=f2(f1...
*Tuesday, April 5, 2016 by B*

**Physics-Lens**

The focal length of your camera lens is 70mm. It is used for taking pictures of your friend who is 1.5m tall. What is your friends distance from the lens if the image just fills the 24mm vertical dimension of the film? I tried M=hi/ho=.16 .16=di-f/f di=-68.88
*Tuesday, April 5, 2016 by B*

**Physics**

Blue light (λ vac= 440 nm) shines onto a puddle of water (n water = 1.33). There is a thin layer of oil (n = 1.47) on top of this water. What is the minimum thickness of the oil if there is constructive interference for the light? I tried 2t=(m+ 1/4)λ/noil but it ...
*Tuesday, April 5, 2016 by B*

**Physics**

A 25 N box is pulled vertically upward by means of a cord.Find the acceleration of the box if the tension in the cord is 35 N.
*Tuesday, April 5, 2016 by Arcel*

**PHYSICS PLS GUYSS**

What does the slope of a Kinetic Energy V.S Gravitational Potential Energy graph represent? I found 1 but I dont know what it represents I know that PE+KE=constant
*Tuesday, April 5, 2016 by Amelie*

**Physics **

Span of a bridge is 32.0m and has a mass of 5.38x10^4 kg. A truck of mass 11700kg is stopped at 11.4m from one end. Find upwards force that must be exerted by each pair
*Tuesday, April 5, 2016 by Sihle*

**physics**

How can we increase the rate of change of magnetic flux? ( i want to check my answer)? Can it be : a) using a stronger magnet b) increasing the rate of movement of the conductor? are these correct?? both of them
*Tuesday, April 5, 2016 by clive*

** physics**

A car starts travelling from rest and undergoes constant acceleration for 10 seconds. If it is travelling at 6m/s after 3 seconds what will be its final velocity?
*Tuesday, April 5, 2016 by anabelle*

**Physics**

You and your little cousin sit on a see-saw. You sit 0.39 m from the fulcrum, and your cousin sits 1.53 m from the fulcrum. You weigh 620 N. How much does she weigh?
*Monday, April 4, 2016 by Tim*

**PHYSICS!!! **

A skier traveling 12.0 m/s reaches the foot of a steady upward 18 degree incline and glides 12.2 m up along this slope before coming to rest. What was the average coefficient of friction?
*Monday, April 4, 2016 by Anne*

**PHYSICS!!!!**

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much energy both choices ...
*Monday, April 4, 2016 by TOM*

**Physics **

A sledder has 800 J of potential energy and 200 J of kinetic energy at one point on a steep hill. How much kinetic energy will the sledder have at the bottom of the hill? (Assume negligible air resistance and friction.)
*Monday, April 4, 2016 by Rickyia *

**PHYSICS!!**

It is 5.0 km from your home to the Physics lab and your car is out of gas. You could run that distance at 10 km/h, which uses up energy at the rate of 700 W; or you could walk it leisurely at 3.0 km/h, which uses energy at 300 W. (a) Calculate how much energy both choices ...
*Monday, April 4, 2016 by Vanessa*

**Physics--Angular Momentum**

A square shaped block of mass m travels to the right with velocity v on a frctionless table surface. The block has side-length 2a. The block hits a very small, immovable obstacle on the edge of the table and starts to tip. The block has moment of inertia I=(2/3)ma^2 about an ...
*Monday, April 4, 2016 by Help PLZZZZZZZZ*

**PHYSICS!!**

A person thought it would be a good idea to change a tire on the side of a hill. The tire has a width of W = 0.30 m and a radius of R = 0.40 m. The inside of the wheel is empty, but the wheel is solid from a radius of R/2 to R with uniform density. The density of the material ...
*Monday, April 4, 2016 by Vanessa*

**PHYSICS!!**

The human body loses heat at a rate of 120W when sitting quietly at rest. If a 65 kg student takes 100 hours to read War and Peace by Leo Tolstoy, how high could they have been lifted if all the heat energy lost was utilised to lift them against gravity (assuming that the ...
*Monday, April 4, 2016 by Vanessa*

**Physics**

A 21-kg child starts at the center of a playground merry-go-round that has a radius of 3.5 m and rotational inertia of 500 kg⋅m2 and walks out to the edge. The merry-go-round has a rotational speed of 0.20 s−1 when she is at the center. What is its rotational speed...
*Monday, April 4, 2016 by Jordann *

**Physics**

water leaves a hose at a rate of 1.5 kg/s with a speed of 20m/s and its aimed at the side of a car, then splashes back from the car at a speed of 18m/s. what is the average force between the water and car during contact?
*Monday, April 4, 2016 by Gabrielle*

**physics**

consider a series R-C circuit consisting of a 30 ohm resistor and 20*10^-6F capacitor connected to a 100V,50Hz power supply.find the magnitude of the current and the angle by which the current leads the voltage.
*Monday, April 4, 2016 by ruth*

**physics**

consider an inductive circuit suppose we want the current amplitude in a radio reciever to be 250*10^-6 A when the voltage amplitude is 3.6V at a frequency of 1.6MHz. what inductance reactance is needed?what inductance is needed?
*Monday, April 4, 2016 by selina*

**Physics**

a merry-go-round of radius 2 m and a moment of inertia 651 kgmm is stationary. a 78 kg woman runs at 1.6 m/s and jumps on tangentially to the rim of the merry-go-round. what is the final angular velocity of the merry-go-round?? 0.383 rad/s? 17.672 rad/s? 0.554 rad/s? 0.259 rad...
*Monday, April 4, 2016 by Anonymous*

**physics**

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 1.99 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
*Monday, April 4, 2016 by jb*

**Physics**

A force of 5.0 N acts on a 15 kg body initially at rest. Compute the work done by the force in (a) the first,(b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second.
*Monday, April 4, 2016 by Hammad*

**Physics**

A circular dam has a radius of 10.0 m and a height of 3.0 m. Of the dam will be filled with water from a pipe with an inside diameter of 10 cm and a water flow of 10 litres per second, calculate the time taken to fill the dam to a point 10 cm from the top of the dam.
*Monday, April 4, 2016 by Basil*

**physics**

When a spring is compressed by 3 cm it's P.E. Is U..it's P.E when it is compressed by 6 cm
*Monday, April 4, 2016 by kritika*

**physics**

A car cruise down an expressway at 25m/s it decelerates for 2m/s and last for 3secs. (a) what velocity will the car have at the end (b) calculate the distance the car would cover
*Monday, April 4, 2016 by Olamide *

**physics **

How to distinguish between a stationary wave and a progressive wave?
*Monday, April 4, 2016 by Aya *

**physics**

Can the value of equilibrant be equal to zero? If yes, why?
*Monday, April 4, 2016 by christina*

**physics **

From the roof of a 64 metres high building a ball was thrown which is of 5kg mass.how long it takes to reach the ground? Please show the process with answer
*Monday, April 4, 2016 by Zarine*

**physics **

A cricket ball is thrown vertically upward and it ups and downs for 6 seconds.what is the maximum height of it and how much does it take time to reach the height?
*Monday, April 4, 2016 by Zarine*

**Physics**

In the figure below, a wheel of radius 0.275 m is mounted on a frictionless horizontal axle. A massless cord is wrapped around the wheel and attached to a 1.95 kg box that slides on a frictionless surface inclined at angle θ = 32.7 ° with the horizontal. The box ...
*Sunday, April 3, 2016 by Kimberley*

**physics **

What is the maximum velocity of a spring oscillator with a mass of 0.7 kg and a spring constant of 74 N/m that is released from rest at a position of x = 0.1 m?
*Sunday, April 3, 2016 by Zac*

**physics **

A mass hung from a spring stretches the spring by 11 cm when the mass is resting at its equillibrium position. What will be the frequency of oscillation of this system if the mass is put in motion?
*Sunday, April 3, 2016 by Zac*

**Physics 203**

A spring has its right end fixed and is installed on a horizontal table so that the free end, at equilibrium, is at x=3.00m. A 1.65kg block coming from the left slides along the table. When it passes the origin, it is moving at 5.58m/s. It strikes the spring, compresses it ...
*Sunday, April 3, 2016 by Dorian *

**physics**

prove that I=square root of (I^2avarage). using I=Iosin(wt)
*Sunday, April 3, 2016 by ruth*

**physics**

find heat 45 g at 43c to 23 caculate sph
*Sunday, April 3, 2016 by nuradiin*

**physics**

A playground merry-go-round of radius 2.00 m has a moment of inertia I = 255 kg·m2 and is rotating about a frictionless vertical axle. As a child of mass 25.0 kg stands at a distance of 1.00 m from the axle, the system (merry-go-round and child) rotates at the rate of ...
*Saturday, April 2, 2016 by jojo*

**physics**

The system of small objects shown in the figure below is rotating at an angular speed of 2.0 rev/s. The objects are connected by light, flexible spokes that can be lengthened or shortened. What is the new angular speed if the spokes are shortened to 0.15 m? (An effect similar ...
*Saturday, April 2, 2016 by jojo*

**physics**

In a circus performance, a large 5.0 kg hoop of radius 3.0 m rolls without slipping. If the hoop is given an angular speed of 3.0 rad/s while rolling on the horizontal and allowed to roll up a ramp inclined at 10° with the horizontal, how far (measured along the incline) ...
*Saturday, April 2, 2016 by jojo*

**physics**

Use conservation of energy to determine the angular speed of the spool shown in the figure below after the 3.00 kg bucket has fallen 4.05 m, starting from rest. The light string attached to the bucket is wrapped around the spool and does not slip as it unwinds. rad/s
*Saturday, April 2, 2016 by joanna*

**physics**

Question Part Submissions Used A 11.5-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10.9 m/s, determine the following. (a) the translational kinetic energy of its center of gravity J (b) the rotational kinetic ...
*Saturday, April 2, 2016 by joanna*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 270 N applied to its edge causes the wheel to have an angular acceleration of 0.854 rad/s2. (a) What is the moment of ...
*Saturday, April 2, 2016 by joanna*

**physics**

The large quadriceps muscle in the upper leg terminates at its lower end in a tendon attached to the upper end of the tibia (see figure (a)). The forces on the lower leg when the leg is extended are modeled as in figure (b), where vector T is the force of tension in the tendon...
*Saturday, April 2, 2016 by joanna*

**physics**

A 1400-N uniform boom at ϕ = 70.0° to the horizontal is supported by a cable at an angle θ = 20.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight w = 2250 N hangs from its top. (a) Find the tension ...
*Saturday, April 2, 2016 by jojo*

**physics**

A person bending forward to lift a load "with his back" (Figure (a)) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal supporting force ...
*Saturday, April 2, 2016 by jojo*

**PHYSICS**

A player kicks a ball at an angle of 37 with the horizontal and with the initial velocity of 14.6m/s. A second player standing at a distance of 30.5m from the first in the direction of the kick starts running to meet the ball at the instant it is kicked. How fast must he run ...
*Saturday, April 2, 2016 by PEACE*

**PHYSICS**

An object of mass 5kg is whirled round a horizontal circle of radius 5m with uniform speed of 5m/s by a revolving string inclined to the verticat. Calculate the tension in the string and the angle of inclination of the string to the vertical.Pls show the workings
*Saturday, April 2, 2016 by PEACE*

**Physics**

A boy sliding down a frictionless plane inclined at an angles 35° with the horizontal. What is the acceleration of the book?
*Saturday, April 2, 2016 by Alyssa*

**Physics**

A man is swinging his child, Wii weighs 28.5 kilograms, in horizontal circle which has a radius of 0.75 meters and it takes the child 1.75 seconds to make one revolution. a) What is the magnitude and direction of the force the man exerts on his child? b) What is the magnitude ...
*Saturday, April 2, 2016 by Carl*

**Physics**

Block A, with a mass of 26 kg, rests on a 38° incline. The coefficient of kinetic friction is 0.46. The attached string is parallel to the incline and passes over a massless, frictionless pulley at the top. Block B, with a mass of 37 kg, is attached to the dangling end of ...
*Saturday, April 2, 2016 by Ashraf *

**physics**

A small block of mass 2.7 kg is released from rest at the top of the curved frictionless ramp shown. The block slides down the ramp and is moving with a speed of 13.9 m/s when it collides with a larger block (1.5 times the mass). (Use g=10m/s²). If the larger block moves ...
*Friday, April 1, 2016 by juan*

**physics**

ten identical resistors connected in parallel have an equivalent resistance of 2 ohm.when they are connected in series what will be its effective resistance?
*Friday, April 1, 2016 by Anonymous*

**Physics**

If length a = 0.6 m width b = 0.8 m, Q = -6.0nC and q = 4.0nC, what is the magnitude of point P? LAYOUT: q is found on the bottom left corner of a square. point q is perpendicular to point Q from the top and from point P from the right, creating a 90 degree angle.
*Friday, April 1, 2016 by Lily*

**physics 1**

calculate the net electric charge of 1.25 moles of sodium ions ( a sodium ion consist of 11 protons and 10 eletrons).
*Friday, April 1, 2016 by Masixole Mnqiwu*

**physics **

The charges 10micro C and -10 micro C are placed at a point A and B seprated by a distance of 10 cm. Find the electric field on the perpendicular bisector of ab at a distance of 12cm from its middle point.
*Thursday, March 31, 2016 by ritik Sharma *

**PHYSICS**

Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 17 cm . You take the balloon in an airplane, where the pressure is 0.89 atm. If the temperature is unchanged, what's the balloon's new radius?
*Thursday, March 31, 2016 by lizbeth*

**Physics**

Two vertices of a rectangle are on the positive x axis. The other two vertices lie on the lines y= 4x and y= -5x + 6. Then the maximum area of the rectangle is: answer= 4/5
*Thursday, March 31, 2016 by Ashu*

**Physics**

A 3.0cm diameter crankshaft that is rotating at 2500 rpm comesto a halt in 1.5 s. a- what is the tangential acceleration of a ponit on thesurface? b-how many revolutions does the crankshaft make as itstops? For this question, what are the applicable concepts and/or laws and ...
*Thursday, March 31, 2016 by Jeff*

**Physics/Cars**

Does the mass of the car matter when driving on the road? When skidding?
*Thursday, March 31, 2016 by Jen*

**Physics**

A man drags a 68.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 23.5° above the horizontal, and the strap is inclined 55.0° above the horizontal. The center of gravity of the crate ...
*Thursday, March 31, 2016 by Anonymous*

**Physics**

Two students are on a balcony a distance h above the S street. One student throws a ball vertically downward at a speed vi ; at the same time, the other student throws a ball vertically upward at the same speed. Answer the following symbolically in terms of vi, g, h, and t. (a...
*Thursday, March 31, 2016 by Anonymous*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.
*Thursday, March 31, 2016 by Anonymous*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.
*Thursday, March 31, 2016 by Anonymous*

**physics**

A particle moving in a striaght line with uniform deceleration has a velocity of 40m/s at point P. 20m/s at point Q and finally come at rest at point R where QR is equal to 50m. calculate the distance PQ. ii, time taken for PQ,. iii, time taken for PR.
*Thursday, March 31, 2016 by Anonymous*

**Physics**

What is the potential energy, in joules, of a spring with a force constant of 6 N/m when it is stretched 20 cm from its unstretched length
*Thursday, March 31, 2016 by Jessica*

**11th grade physics**

An electron is placed in a vertical electric field directed upward and of intensity E=5v/m. Compare the weight of the electron to the electrostatic force to which it is submitted. Deduce. Gravitational field strength: g=9.8m/s^2 Thanks.
*Thursday, March 31, 2016 by angy*

**physics**

a conducting loop consisting of a half circle of radius r=0.2m and three straight sections the half circle lies in a uniform magnetic field B that is directed out of the page the field magnitude is given by B=(4t^2 + 2t + 3)T .w/r t is in second. an ideal battery with emf=2v ...
*Thursday, March 31, 2016 by ruth*

**Physics**

A 2 kg block of ice is placed in a container at 0 °C. How much energy is required to completely melt the block of ice? (Specific latent heat of fusion for ice = 334 J/g.) A little confused as to what formula to use for this
*Thursday, March 31, 2016 by ronald*

**physics**

A capacitor acquires 0.002 coulomb when 50 volts is applied. Its capacitance is a. 0.4 microfarad b. 4.0 microfarads c. 40.0 microfarads d. 400.0 microfarads
*Thursday, March 31, 2016 by Isaac Pavlov*

**Physics **

A block is projected up a frictionless inclined plane with initial speed v0 = 2.19 m/s. The angle of incline is θ = 25.1°. (a) How far up the plane does it go? (b) How long does it take to get there? (c) What is its speed when it gets back to the bottom?
*Thursday, March 31, 2016 by Sara*

**Physics **

Three astronauts, propelled by jet backpacks, push and guide a 118 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 32 N, F2 = 56 N, F3 = 38 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured ...
*Thursday, March 31, 2016 by Sara*

**physics**

A radioactive source of a single nuclide emits 2.4-MeV neutrons at the rate of 9200 neutrons per second. The number of atoms in the source is 4.0 ×109. The activity of the source, in nCi, is
*Thursday, March 31, 2016 by jay*

**physics **

a body is thrown a point with speed 50m/s at an angle 37 degree with horizontal. when it has moved a horizontal distance of 80 m then it's distance from point of projection
*Thursday, March 31, 2016 by kk*

**Physics**

A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71¡ã W] and the second stone moves away at a velocity of 1.25 m/s [N44¡ã E], what was the ...
*Wednesday, March 30, 2016 by tom*

**Physics **

A crate is initially at rest and then slides down a long inclin that is 30 degrees above the horizontal. If the coefficient of kinetic friction is 0.40, the speed of the crate after 5s is ?
*Wednesday, March 30, 2016 by Danielle *

**Physics**

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.7 kg and the sign has a mass of ms = 17.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached...
*Wednesday, March 30, 2016 by Anonymous*

**Physics**

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.7 kg and the sign has a mass of ms = 17.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached...
*Wednesday, March 30, 2016 by Anonymous*

**Physics**

A high-speed sander has a disk 5.70 cm in radius that rotates about its axis at a constant rate of 1120 revolutions per minute. a.) Determine the angular speed of the disk in radians per second. b.) Determine the linear speed of a point 2.40 cm from the disk's center. c.) ...
*Wednesday, March 30, 2016 by Emily*

**Physics**

How do you turn revolutions into radians? Please help!
*Wednesday, March 30, 2016 by Emily*