Tuesday

May 3, 2016
Number of results: 37,965

**plz help math **

solve variation problem. if y varies directly as x and inversely as m^2 and r^2 and y=5/3 when x=1, m=2 and r=3, find y when x=3, m=1 and r=8
*February 24, 2012 by Anonymous*

**Math**

R varies jointly as S and the square of T. If R is 32.4 when S=0.2 and T=9, find R when S=0.5 and T=5. I believe the answer is R=25, could someone check this for me?
*March 15, 2012 by Allie*

**algebra**

I do not know where to start with this one. Suppose p varies directly as the square of z and inversely as r. If p = 32/5 when z = 4 and r = 10, find p when z = 3 and r = 36.
*June 24, 2012 by Jeff*

**Math**

Finally, the toe of the stick varies in : A. length B. height C. width D. Area
*July 8, 2012 by Amy*

**Math - Algebra**

Write an equation for the given: "f varies inversely as m and f is 32 when m is 0.2." Also, find f is m = 4.
*October 17, 2013 by McKenna Louise*

**Physics**

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the figure. As the station rotates, an astronaut in chamber A is moved 1.50 x 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
*October 15, 2013 by Dreama*

**physics**

An enemy ship is on the east side of a mountain island, as shown in the figure. The enemy ship has maneuvered to within d1 = 2153 m of the h = 1690 m high mountain peak and can shoot projectiles with an initial speed of vi = 247 m/s. If the western shoreline is horizontally d2...
*February 16, 2011 by Anonymous*

**physics**

An enemy ship is on the east side of a mountain island, as shown in the figure. The enemy ship has maneuvered to within d1 = 2153 m of the h = 1690 m high mountain peak and can shoot projectiles with an initial speed of vi = 247 m/s. If the western shoreline is horizontally d2...
*February 18, 2011 by Anonymous*

**College Physics**

A ball of mass 620 g hangs from a spring whose stiffness is 195 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is stretched, and its length...
*October 5, 2012 by Anabel*

**Physics please HELP**

After the velocity selector, a mass spectrometer allows the charged particle to enter a region of magnetic field only, where it follows a curved trajectory and hits a detector which records his position. Your mass spectrometer has the velocity selector set for 2.39 x 10^5 m/s ...
*November 26, 2013 by Ramana*

**Algebra**

I'm suppose to write an equation with the following information: Line passes through (2,-6) and is parallel to x=8 I know i must use the slope point form the problem is that since x=8 I don not know which is the slope. Please help me :) The line for x=8 is a straight line ...
*January 25, 2007 by claudia*

**physics**

Cliff and Will are carrying a uniform 2.0m board of mass 69kg. Will is supporting the board at the end while cliff is 0.6m from the other end as shown in the following figure. Cliff has attached his lunch to his end of the board, and the tension in the string supporting the ...
*February 23, 2012 by brett*

**MATH**

USING AM IMAGINARY FIGURE OF $19,250.00 AS AN ANNUAL INCOME FIGURE, HOW MUCH MONEY COULD YOU SAVE A YEAR IF YOU BUDGETED HALF OF 2.4%?
*September 7, 2011 by J*

**math**

two figures are similar. the ratio of the corresponding dimensions 3:4. the perimeter of the larger figure is 60 units.what will be the perimiter of the smaller figure
*December 7, 2011 by tdog*

**Phy**

In the figure, a block of mass m = 3.09 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of magnitude F = 13.7 N at an angle θ = 23.0°. (a) What is the magnitude of the block's acceleration? (b) The force magnitude F is slowly increased. ...
*September 26, 2015 by Kyle*

**Physics**

A small bead of mass m is constrained to move along a frictionless track as shown. The track consists of a semicircular portion of radius R followed by a straight part. At the end of the straight portion there is a horizontal spring of spring constant k attached to a fixed ...
*October 11, 2013 by ashok*

**Math**

Let S be the set of {(1,1),(1,−1),(−1,1)}-lattice path which begin at (1,1), do not use the same vertex twice, and never touch either the x-axis or the y-axis. Determine the largest value of n such that every path in S which ends at (n,n) has length at most 50000.
*May 14, 2013 by Sambaran G.*

**Geometry**

Let S be the set of {(1,1),(1,−1),(−1,1)} -lattice path which begin at (1,1) , do not use the same vertex twice, and never touch either the x -axis or the y -axis. Determine the largest value of n such that every path in S which ends at (n,n) has length at most ...
*May 16, 2013 by John*

**math**

Let S be the set of {(1,1),(1,−1),(−1,1)}-lattice path which begin at (1,1), do not use the same vertex twice, and never touch either the x-axis or the y-axis. Determine the largest value of n such that every path in S which ends at (n,n) has length at most 50000.
*May 16, 2013 by Pandey ji*

**math**

Let S be the set of {(1,1),(1,−1),(−1,1)}-lattice path which begin at (1,1), do not use the same vertex twice, and never touch either the x-axis or the y-axis. Determine the largest value of n such that every path in S which ends at (n,n) has length at most 50000.
*May 18, 2013 by Gandu man*

**Physical Education**

Preliminary design of a compressor drive train Determine the force-time function within the compressor’s cylinder and the torque-time function acting on the input shaft on the compressor during any cycle. Given: Compressor speed is 1500rpm. The compressor has a bore of 3.125 ...
*August 24, 2011 by IceBerg*

**physics HELPP!!!!!!!**

A 6.00 kg mass is connected by a light cord to a 1.00 kg mass on a smooth surface as shown in the figure. The pulley rotates about a frictionless axle and has a moment of inertia of 0.400 k∙m2 and a radius of 0.700 m. Assuming that the cord does not slip on the pulley, ...
*November 14, 2012 by anon*

**College Physics**

A wooden bridge crossing a canyon consists of a plank with length density λ = 2.25 kg/m suspended at h = 10.89 m below a tree branch by two ropes of length L = 2h and with a maximum rated tension of 2000 N, which are attached to the ends of the plank, as shown in the ...
*November 10, 2013 by Kimmy*

**Chemistry please check**

1. A Geiger counter measures radiation indirectly by measuring flashes of light electrons released by ionization speaker static curies answer: electrons released by ionization 2. Reactor control rods are made of a substance that absorbs neutrons reflect neutrons emits neutrons...
*February 16, 2008 by Mary*

**physics**

A 30.0-kg block is resting on a flat horizontal table. On top of this block is resting a 15.0-kg block, to which a horizontal spring is attached, as the drawing illustrates. The spring constant of the spring is 340 N/m. The coefficient of kinetic friction between the lower ...
*November 26, 2013 by Donna*

**MIT 2.01X**

Posted by MAN on Tuesday, June 18, 2013 at 9:24pm. We will obtain bending moment diagrams for three beams and calculate stresses inside the beams. For each beam, take the x-axis along the neutral axis of the beam, oriented from left to right, with origin at A. HW7_1A_1 : 5.0 ...
*June 23, 2013 by AMK*

**physics**

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding freely, how does the upward force of the ice ...
*September 29, 2012 by sammy*

**physics**

A pulley is attached to the ceiling (as shown in the figure below). Spring scale A is attached to the wall and a rope runs horizontally from it and over the pulley. The same rope is then attached to spring scale B. On the other side of scale B hangs an W = 75-N weight. What ...
*February 17, 2011 by mayrel*

**science**

A machine has a mechanical advantage of 2. This means its output force is _____. a. 0.5 times greater than the input force b. 2 times smaller than the input force c. 2 times greater than the input force d. 2 times more efficient than the input force
*February 13, 2011 by donna*

**Physics**

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.31 × 106 m/s.Find the central force acting on the electron as it revolves in a circular orbit of radius 4.95 × 10−11 m. Answer in units of N. Find the centripetal acceleration of the ...
*February 20, 2011 by CR*

**PHYSICS**

Two point charges are placed on the x axis as follows: Charge q1= 4.20 is located at x= 0.185 , and charge q2= 4.80 is at x= -0.280 . What are the magnitude and direction of the net force exerted by these two charges on a negative point charge A = -0.625placed at the origin?
*September 19, 2012 by Anonymous*

**physic**

two point charges are located on the y axis as follows : charge q1 = -1.50nc at y= -0.600m, and charge q2 = +3.2nc at the origin (y=0) what is the net force (magnitude and direction) exerted by these two charges on a third charge q3 = +5.00 nc located at y = -0.400 m ?
*February 12, 2013 by yanis*

**Physics**

During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.50 m/s^2. When it is 255 m above the launch pad, it discards a used fuel canister by simply disconnecting it. Once it is disconnected...
*July 13, 2011 by Kai*

**physics**

A uranium nucleus 238 U may stay in one piece for billions of years, but sooner or later it decays into an α particle of mass 6.64×10 −27 kg and 234 Th nucleus of mass 3.88 × 10 −25 kg, and the decay process itself is extremely fast (it takes about 10 −...
*January 22, 2011 by Anonymous*

**Physics**

A soccer ball is kicked with an initial speed of 5.1 m/s in a direction 24.5° above the horizontal. Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is kicked.) A) 0.25 s ...
*September 23, 2010 by Vin*

**Physics**

A soccer ball is kicked with an initial speed of 5.1 m/s in a direction 24.5° above the horizontal. Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is kicked.) A) 0.25 s ...
*September 23, 2010 by Vin*

**Physics**

Assume that you take data on the projectile range for a variety of different launch angles A at a fixed initial velocity Vo. You would like to plot your data to see if the range formula discussed in the introduction is supported by the data. The easiest way to do this is to ...
*February 17, 2014 by Tim*

**Physics**

A wooden plank with length L = 7.5 m and mass M = 104 kg is centered on a granite cube with side S = 2.0 m. A person of mass m = 64 kg begins walking from the center of the plank outward, as shown in the figure. How far from the center of the plank does the person get before ...
*June 22, 2012 by Annabelle*

**physics**

A 350 piano slides 3.5 down a 33 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure ). The effective coefficient of kinetic friction is 0.30. Calculate the force exerted by the man.
*November 9, 2010 by Anonymous*

**physics**

Persons A and B are standing on a board of uniform linear density that is balanced on two supports, as shown in the figure. What is the maximum distance x from the right end of the board at which person A can stand without tipping the board? Treat persons A and B as point ...
*April 10, 2011 by I need help*

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, it...
*October 24, 2010 by Ingrid*

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, it...
*October 24, 2010 by Adam*

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, ...
*October 24, 2010 by Ashley*

**Physics**

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, it...
*October 24, 2010 by Ashley*

**Physics **

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, ...
*October 24, 2010 by PLEASE HELP*

**Physics**

A 63-kg ice-skater glides with a speed of 10 m/s toward a 14-kg sled at rest on the ice. The ice-skater reaches the sled and holds on to it. The ice-skater and the sled then continue sliding in the same direction in which the ice-skater was originally skating. What is the ...
*March 22, 2016 by Emily*

**physics**

A loudspeaker has a movable diaphragm (cone) that vibrates back and forth in harmonic motion to produce sound. The displacement of the cone playing a sinusoidal test tone is shown above. Find the following values from the graph. (NOTE: t = 0.03 sec, and the vertical axis of ...
*December 31, 2012 by sunny*

**physics**

An infinite sheet with a negative surface charge density runs parallel to the x axis. Another infinite sheet with an equal but opposite sign surface charge runs parallel to the y axis. The difference in electric potential from the point x = +5.2 m, y = +3.1 m to the point x...
*February 10, 2012 by Mandaleigh*

**physics**

The system shown in the Figure is in equilibrium. The mass of block 1 is 2.2 kg and the mass of block 2 is 3.5 kg. String 1 makes an angle = 28o with the vertical and string 2 is exactly horizontal. what is the angle between the string that connects the masses and the string ...
*April 10, 2008 by lizzy*

**Physics**

In a fairground ride a child of mass 37 kg stands against the inside surface of a circular cylinder of radius 3.9m that rotates around its vertical axis of symmetry. The cylinder has an angular speed of 1.3 rad/s and an angular acceleration of 0.12 rad s^-2. What is the radial...
*August 18, 2012 by Alex*

**physics, help urgent!**

charge Q = +4.5 ƒÝC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 ƒÝC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the ...
*November 14, 2012 by Brette*

**Physics. Please please help!**

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the ...
*November 14, 2012 by Kyle*

**Physics**

Three forces act on the object.A 3- N force acts due west, and 4-N force acts due south.If the net force on the object is zero ,what is the magnitude of the third force
*September 21, 2011 by rally*

**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 200 N applied to its edge causes the wheel to have an angular acceleration of 1.048 rad/s2. (a) What is the moment of ...
*October 28, 2014 by Brittany *

**4th grade math**

how can thinking about 90 tens help you with 1901-297? the last posted answer was no correct...it came home marked WRONG...please help!!??
*October 29, 2010 by charlee*

**chemistry **

Which of the following reactions have a positive ΔSrxn? Check all that apply. A(g) +B(g) -----> 3C(g) A(g)+ B(g)------> C(g) 2A (g) +2B (g)-----> 3C(g) A(s)+B(s)------> C(g) I picked the first one and it marked me wrong. Please help(:
*March 14, 2012 by Jerry*

**maths**

A shopkeeper marks his goods in such a way that after allowing a discount of 25% on the marked price , he still makes a profit of 50%. find the ratio of the C.P. to the M.P.
*January 2, 2013 by harpreet*

**cal**

Find c , given that a = 18.2, B = 62°, and C = 48°. Round answers to the nearest whole number. Do not use a decimal point or extra spaces in the answer or it will be marked incorrect. c = a0
*September 2, 2015 by ds*

**Geometry**

With a 12ft. pole marked in feet, how can one determine the foot of the perpendicular let fall to the floor from a point on a ceiling of a room 9ft. high?
*April 30, 2016 by Tam*

**Physics**

A diagram has vector A at 30 degrees above the positive x axis. length = 3 m Vector B is ON the negative x-axis. length = 1 m Vector C is ON the negative y-axis. Length is 2 m What is the direction in degrees of vector a + vector B + vector C?
*January 29, 2012 by Sushmitha*

**Physics**

The x vector component of a displacement vector has a magnitude of 104 m and points along the negative x axis. The y vector component has a magnitude of 185 m and points along the negative y axis. (a) Find the magnitude of . ________m (b) Find the direction of . _________° ...
*September 5, 2011 by Dwight*

**Physics**

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The initial energy plus ...
*July 8, 2011 by Allison*

**Physics**

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The initial energy plus ...
*July 8, 2011 by Allison*

**Physics**

A block of mass 2.30 kg is pushed 2.38 m along a frictionless horizontal table by a constant 16.0 N force directed 26.9o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
*October 1, 2013 by Chris*

**physics**

A block of mass 2.40 kg is pushed 2.09 m along a frictionless horizontal table by a constant 18.6 N force directed 23.7o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
*October 3, 2013 by beccs*

**small engane **

FIGURE A-9—This photo should be used to answer Question 15. 15. Two small engine technicians are disassembling the engine shown in Figure A-9. After observing the engine components, both technicians say that this engine has a splash-type lubrication system. Technician A says ...
*September 5, 2013 by Amanda*

**Physics - Height of ball launch**

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...
*October 21, 2010 by Gina*

**Physics**

A small circular object with mass m and radius r has a moment of inertia given by I = cmr^2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...
*June 19, 2012 by James*

**Physics**

In a huge oil tanker, salt water has flooded an oil tank to a depth of h2 = 4.50 m. On top of the water is a layer of oil h1 = 7.55 m deep, as in the cross-sectional view of the tank as shown in the figure. The oil has a density of 0.700 g/cm3. Find the pressure at the bottom...
*October 28, 2014 by Courtney*

**Physics**

A spherical shell of radius R carries a uniform surface charge density (charge per unit area) σ. The center of the sphere is at the origin and the shell rotates with angular velocity ω (in rad/sec) around the z-axis (z=0 at the origin). Seen from below, the sphere ...
*April 26, 2013 by s*

**physics**

A block of mass m = 2.67 kg is attached to a spring (k = 32.3 N/m) by a rope that hangs over a pulley of mass M = 5.34 kg and radius R = 6.41 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and ...
*March 30, 2011 by toot*

**Physics**

A block of mass m = 3.65 kg is attached to a spring (k = 27.5 N/m) by a rope that hangs over a pulley of mass M = 7.30 kg and radius R = 2.81 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and ...
*October 31, 2014 by Kyle*

**Physics Important please**

After the velocity selector, a mass spectrometer allows the charged particle to enter a region of magnetic field only, where it follows a curved trajectory and hits a detector which records his position. Your mass spectrometer has the velocity selector set for 2.39 x 10^5 m/s ...
*November 26, 2013 by Ramana*

**physics**

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces ...
*October 15, 2011 by riley*

**physics**

A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m. (a) Treating the tire as a hoop, what is its moment of inertia about an axis passing through the hub at its center? kg · m2 (b) What torque is required to produce an angular acceleration of 0.710 rad/s2? N · m (c) ...
*March 6, 2015 by alba*

**Physics 1**

A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m. (a) Treating the tire as a hoop, what is its moment of inertia about an axis passing through the hub at its center? kg · m2 (b) What torque is required to produce an angular acceleration of 0.710 rad/s2? N · m (c) ...
*March 6, 2015 by Gina*

**physics**

A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m. (a) Treating the tire as a hoop, what is its moment of inertia about an axis passing through the hub at its center? kg · m2 (b) What torque is required to produce an angular acceleration of 0.710 rad/s2? N · m (c) ...
*March 19, 2015 by alba*

**Chemistry**

Plot the titration of a weak base with a strong acid. Show the titration curve using .106M NH3 and .225M HCl for a 50.00mL sample of the ammonia. No idea where to start here. I'm supposed to plot the curve from 2mL increments (0-30). Tip on homework: *Remember to use the m1v1...
*October 22, 2014 by Andrew*

**Science**

A skier of mass 75 kg accelerates from rest down the slope as shown in the diagram (It's a triangle with a height of 300 m, length of 400 m, and the hypotenuse is 500 m; The skier is on the hypotenuse. At the bottom of the slope, he is travelling at 40 m/s. What is the average...
*December 17, 2012 by John*

**science**

Suppose you place a 30kg weight 50cm from the pivot where should the following forces be applied to lift the load a)a 100N force b)a 150N force 2)how far will the load in question 1 be lifted if: a)the 100N force moves downwards b)the 150N force moveddownwards 1m
*September 16, 2014 by yvonne*

**Physics**

The Russell Traction System To immobilize a fractured femur (the thigh bone), doctors often utilize the Russell traction system illustrated in the figure. Notice that one force is applied directly to the knee, F_1,while two other forces, F_2 and F_3 are applied to the foot. ...
*October 2, 2009 by Jenny*

**Calculus**

Find the area cut off by x+y=3 from xy=2. I have proceeded as under: y=x/2. Substituting this value we get x+x/2=3 Or x+x/2-3=0 Or x^2-3x+2=0 Or (x-1)(x-2)=0, hence x=1 and x=2 are the points of intersection of the curve xy=2 and the line x+y=3. Area under curve above X axis ...
*April 1, 2014 by MS*

**Physics**

A solid brass ball of mass 9.5 g will roll smoothly along a loop-the-loop track when released from rest along the straight section. The circular loop has radius R = 4.2 m, and the ball has radius r << R. (a) What is h if the ball is on the verge of leaving the track when...
*November 17, 2011 by Bridgette*

**Algebra**

I need help figuring out the rest of this problem. A kitchen pantry area as shown in the figure is to be covered in floor tiles. What will it cost to tile the floor if each square tile whose measures 6” costs $.82? I can send a picture of the shape but it is divided into three...
*March 11, 2008 by Bretagne*

**math,correction,plz**

can someone correct these for me plz. Simplify by combining like terms. Problem#32 radical(63) minus 2radical(28) plus 5radical(7) My answer: 4radical(7) Find the perimeter of the triangle shown in the figure. leg...1 = radical (5) + radical (3) leg...2=radical (5) - radical (...
*March 10, 2007 by jas20*

**Science**

A particle has a velocity of 18m/s at a certain time and 2.4s later is velocity is 30m/s in the opposite direction. What are the magnitude and direction of the particle's acceleration during the 2.4s interval? I udes a=change in velocity /change in time and I got -20m/s^2 is ...
*September 19, 2006 by Christina*

**Math**

At a sale Jean recieved a discount of $10.00 on a coat marked $80.00. What was the rate of the discount?
*April 21, 2009 by Courtney*

**math**

Teena's favorite jeans were marked down from $30 to $25. What was the percent discount on the jeans?
*January 11, 2011 by Lo*

**business math**

If the Powershooter 1800 is marked up 58.50 what is the cost and the percent markup cost?
*May 29, 2014 by c*

**physics**

Two blocks, each of mass m, are attached to the ends of a massless rod which pivots as shown in Figure 8-40. Initially the rod is held in the horizontal position and then released. Calculate the magnitude and direction of the net torque on this system. (Express your answer in ...
*November 10, 2009 by jenn*

**Physics**

A flatbed truck with a box sitting on the bed accelerates from rest on level ground. The truck’s speed as a function of time is 15t –2t^2 during this acceleration. The truck reaches its maximum speed and cruises along at this speed for 4 minutes. It then slows to a stop with ...
*August 10, 2012 by Chad*

**physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially has...
*October 14, 2013 by Anonymous*

**Physics**

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 20.0° below the horizontal. A 40.0-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts? (b) ...
*October 3, 2014 by Anon*

**particle in a box**

Find the ground state energy of a particle restricted to move in one dimension subject to the potential below using perturbation theory. The box is like a normal box except it has a step in the middle of it making it have 2 wells with length a and the width of the step is b. I...
*April 19, 2009 by Jill*

**check my precalc**

#1. Make up a polynomial that has the following characteristics: crosses the x axis at 1 and 4, touches the x axis at 0 ad 2. and is above the xaxis between 0 and 2. I did (x+1)(x-4)(x^2)(x-2)^2 #2. its an illustration but one of the queestino says what is the minimum degree ...
*October 7, 2012 by Rebekah *

**physics**

I'm suppose to draw velocity time and acceleration time graph for a rocket that is launched vertically into the air and falls back down to its initial height. We are to assume that x axis is up. So would I draw an curved figure like a downward parabola or a straight vertical ...
*September 5, 2011 by Jennifer*

**math**

A pair of pants with a marked price of $35.00 has a discount of 20%. How much is the discount? A. $7.00 B. $17.50 C. $28.00 D. $42.00
*May 28, 2009 by anon*

**math**

jewelry marked 14 karat gold is 14/25 pure gold. what is the percent
*February 11, 2013 by anynomous*

**math**

jewelry marked 14 karat gold is 14/24 pure gold. what is the percent
*February 11, 2013 by Joseph*

**Science**

In high energy physics, a particle called lambda has zero charge and may be thought of as a neutron with a strange quark replacing a down quark. One way this particle decays is by conversion into proton and emission of a muon and a muon antineutrino via the weak interaction, ...
*September 23, 2011 by Katarzyna*