Monday

November 30, 2015
Number of results: 15,113

**Physic**

Block A of mass 2.2 kg is on block B of mass 5.2 kg as shown in the above figure. The lower block is on a frictionless surface while the coefficient of static friction is 0.3 between the two blocks. a) If they are moving at constant velocity, what is the frictional force ...
*October 25, 2015 by Anonimea*

**Physics**

A 0.18 kg point mass moving on a frictionless horizontal surface is attached to a rubber band whose other end is fixed at point P. The rubber band exerts a force F = bx toward P, where x is the length of the rubber band and b is an unknown constant. The mass moves along the ...
*November 4, 2010 by Jessica*

**physics**

A baseball is thrown with an initial velocity of magnitude v at an angle of 27.2 with respect to the horizontal (x) direction. At the same time, a second ball is thrown with the same initial speed at a different angle with respect to x. If the two balls land at the same spot, ...
*January 30, 2010 by Sal*

**Physics **

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.53 m. The stones are thrown with the same speed of 8.62 m/s. Find the location (above the base of the ...
*September 13, 2014 by Steven*

**college physics**

Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed in contact with each other on a frictionless horizontal surface. A constant force F = 9.00 N is applied to the block of mass m1. a) Determine the magnitude of the acceleration of the two-block system. b) Determine ...
*February 11, 2012 by lacrosse*

**11 Physics**

my teacher gave me this question for review and i don't know how to do it!! HELP!!! A ball is thrown upwards, from a building. It's height(h), in meters above the ground seconds(t) after being thrown is given by h(t)=-5t^2+15t+50 a) How tall is the building? (explain your ...
*September 3, 2014 by Sam*

**Physics**

The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the planet’s surface and P?
*January 19, 2011 by Christine*

**Physics**

An equipotential surface that surrounds a +2.7 x 10^-7 C point charge has a radius of 0.13 m. What is the potential of this surface?
*September 1, 2007 by Mary*

**physic**

How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface?
*March 12, 2012 by coleman*

**Math**

An underground tank full of water has the shape of a circular cone with a base radius 5m and height 4m at the top. The top of the tankl is 2m below the ground-surface and is connected to the surface by a spout. Find the work required to empty the tank by pumping all of the ...
*November 17, 2010 by Breona*

**physics**

The average rate at which energy is conducted outward through the ground surface in a certain region is 51.6 mW/m2, and the average thermal conductivity of the near-surface rocks is 3.31 W/m·K. Assuming a surface temperature of 11.7°C, find the temperature (in Celsius) at a ...
*April 14, 2011 by tim*

**physics**

The average rate at which energy is conducted outward through the ground surface in a certain region is 66.8 mW/m2, and the average thermal conductivity of the near-surface rocks is 2.13 W/m·K. Assuming a surface temperature of 8.01°C, find the temperature (in Celsius) at a ...
*April 1, 2013 by Ashley*

**HELP Physics**

The average rate at which energy is conducted outward through the ground surface in a certain region is 30.9 mW/m2, and the average thermal conductivity of the near-surface rocks is 3.11 W/m·K. Assuming a surface temperature of 9.48°C, find the temperature (in Celsius) at a ...
*April 12, 2013 by Shane*

**Physics**

Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in the string and the ...
*November 20, 2013 by Angie*

**Physics**

Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in the string and the ...
*November 30, 2013 by Angie*

**Physics**

A ball is thrown straight up from the ground with speed v_0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the first ball was thrown upward. There is no air resistance. Find the value of H in terms of v_0 and g so that ...
*May 28, 2010 by Anonymous*

**Algebra 1**

A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 80 meters high. The height of the ball is given by the quadratic equation h = -49t^2 + 35t + 140 where h is in meters and t is the time in seconds since the ball was thrown. Find the ...
*March 7, 2013 by Sherry*

**Chemistry**

would the density of a person be the same on the surface of earth and on the surface of the moon? explain?
*September 20, 2007 by Charles*

**chemistry**

Would the density of a person be the same on the surface of the Earth and on the surface of the moon? Explain.
*October 9, 2008 by laurel*

**physics**

The natural greenhouse effect raises the surface temperature at the surface of the Earth by about 20 or 40 k?
*October 15, 2010 by jim*

**Physics**

How far above the surface of Earth would you weigh 63.6 percent of your surface weight?
*March 5, 2012 by Sarah*

**physics **

A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration of the block as it slides down...
*October 17, 2011 by carlton*

**Physics**

A pond with a flat bottom has a surface area of 820 m^2 and a depth of 2.0m. on a warm day, the surface water is a temperature of 25 deg C, while the bottom of the pond is at 12 deg C. Find the rate at which energy is transferred by conduction from the surface to the bottom of...
*November 18, 2012 by R*

**physics**

A 0.45 kg soccer ball approaches a player horizontally with a velocity of magnitude equal to 35 m/s. The player heads the ball straight back out horizontally, and the magnitude of the ball’s velocity after the collision is 40 m/s. The contact time between their head and the ...
*July 12, 2012 by Jessica*

**Physics**

Block A of mass 2.0 kg and Block B of 8.0 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force of 4.0 N, with both blocks experiencing equal constant ...
*November 14, 2012 by Alexa*

**Physics**

Block A has a mass of 4.11 kg and block B has a mass of 5.1 kg. The blocks are connected by a string of negligible mass and are free to slide on a horizontal, frictionless surface. A force vectorA=(11.1 N)i is applied to block A and a force vectorB=(24.6 N)i is applied to ...
*July 2, 2015 by Natasha M.*

**physics**

a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. ) Suppose now friction is present and k = 0....
*May 13, 2015 by sam*

**mechanics: simple harmonic oscillation**

Consider an ideal spring that has an unstretched length ℓ and a spring constant k. Suppose the spring is attached to a mass m that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x_0 from equilibrium and then released with an...
*September 3, 2015 by student1618*

**Pol 201**

Question 4.4. Liberalism rests in a conception of equality whereby the government (Points : 1)
*February 3, 2014 by Joe*

**physics**

Two equipotential surfaces surround a +1.61 10-8-C point charge. How far is the 191-V surface from the 68.0-V surface?
*September 8, 2009 by amber*

**Physic**

How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface?
*July 10, 2010 by Andrea*

**geometry**

Determine the surface area of a label that covers the lateral surface of a cylindrical can with height 40 mm and diameter 24 mm.
*May 12, 2011 by JOY*

**Math/Physics**

A ball rolls horizontally off the edge of a tabletop that is 1.60 m high. It strikes the floor at a point 1.58 m horizontally away from the table edge. (Neglect air resistance.)How long was the ball in the air? What was its speed at the instant it left the table? The time in ...
*February 1, 2007 by winterWX*

**PHYSICS**

A wheel in the shape of a uniform disk of radius R and mass mp is mounted on a frictionless horizontal axis. The wheel has moment of inertia about the center of mass Icm=(1/2)mpR2 . A massless cord is wrapped around the wheel and one end of the cord is attached to an object of...
*November 18, 2013 by Anonymous*

**Physics**

Ball A is thrown straight down off the top of a tall building with an initial velocity of 20m/s. Ball b is thrown straight up from the top of the same building with initial velocity of 20 m/s. Which ball, if either, experiences the greater acceleration after leaving the ...
*February 7, 2014 by Chris*

**physic pls help**

Cleo and Clare are looking from their balcony to a swimming pool below that is located 15 m horizontally from the bottom of their building. They estimate the balcony is 45 m high and wonder how fast they would have to jump horizontally to succeed in reaching the pool. What ...
*June 24, 2015 by allexelle*

**physics**

A baseball is seen to pass upward by a window 27 m above the street with a vertical speed of 12 m/s. The ball was thrown from the street. (a) What was its initial speed? (b) What altitude does it reach? (c) How long after it was thrown did it pass the window? (d) After how ...
*September 4, 2007 by peter*

**physics**

two objects are thrown from the top edge of a cliff with a speed of 10 m/s. one object is thrown straight down and the other straight up. if the first object hits the ground in 4.0 second, the second hits the ground in ________ seconds after the first object.
*August 9, 2012 by bob*

**General Physics**

During heavy rain, a section of a mountainside measuring 2.5 km horizontally, 0.80 km up along the slope, and 2.0m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.40km x 0.40km and that ...
*August 21, 2010 by Mike*

**Physics**

As shown in the figure below, cars #1 and #2 are sliding across a horizontal frictionless surface. The cars are equipped with a coupling arrangement similar to the one on railroad cars. Car #1 overtakes car #2 and they have a totally inelastic collision and become coupled ...
*January 12, 2015 by Anonymous*

**Physics 1**

A mass of 5 kg lies on a frictionless, horizontal floor. A force of 135 Newtons is applied to the mass at an angle above the positive x axis and a force of 14 Newtons is applied to the mass at an angle of 22.8 degrees below the negative x direction (see sketch). If the angle ...
*October 4, 2011 by J*

**Calc**

Consider the surface xyz = 20. A. Find the unit normal vector to the surface at the point (1, 4, 5) with positive first coordinate. B. Find the equation of the tangent plane to the surface at the given point. Express your answer in the form ax + by + cz + d = 0, normalized so ...
*October 10, 2007 by Mike*

**Physics**

One object is thrown straight up at 54.9 m/s from the ground at the base of a building with is 157.9 meters tall. At the same time the object is thrown up at the bottom of the building, another object is thrown straight down at the top of the building. If both objects are to ...
*September 24, 2014 by Kimmy*

**Physics**

If an object on a horizontal frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced a distance 0.130 m from its equilibrium position and released with zero initial speed. Then after a time 0.803 s its displacement is ...
*January 2, 2007 by Hadi*

**Physics.**

A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. The surfaces of the blocks are rough. A constant force of magnitude F is applied to the first block. a) Identify the horizontal force that ...
*October 16, 2012 by Kelsey*

**physics/math**

Ahhh! I've seen some examples of this type of problem but I can't seem to solve it! Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The stones are ...
*December 13, 2011 by Courtney*

**Geometry**

When finding the surface area of a composite figure, which in this case consists of a square pyramid sitting on top of a cube, I know that the first step is to find the surface area of the cube, but after that I would find the surface area of the square pyramid, but do I ...
*June 13, 2012 by Anonymous*

**Physics**

Problem Solving. Anne throws a ball horizontally from the top of a building that is 50 m high. He hopes the ball will reach the swimming pool that is at the bottom of a building 12 m horizontally from the edge of the building. If the ball is to reach the pool, with what ...
*March 16, 2015 by arlene*

**physics**

A mass is pushed over a surface by a 19 N force that acts somewhat downward at an angle of θ = 45° to the horizontal as shown in the figure below. The mass is 3.0 kg and the coefficient of friction between the mass and surface is 0.25. (a)What is the magnitude of the ...
*October 25, 2015 by Anonymous*

**mechanics**

Jayden holds a 3kg block pressed up against a spring on a horizontal and frictionless surface. The spring has a spring constant of 300Nm. The spring is fixed in place, but the block is free to move. The spring is initially compressed by .5 m and the block is at rest. Jayden ...
*July 6, 2014 by juanpro*

**please check this Physics**

A 5kg block slides along a frictionless surface at 8 m/s toward a second block that is 2kg and attached to the end of a spring,The spring has a constant of 250N/m . When the blocks collide they stick together. What is the speed of the two blocks immediately after the collision...
*January 14, 2014 by Kelsey *

**physics**

a ray of light in air enters a glass surface at right angles to the surface. what is the angle of refraction
*November 22, 2012 by bi*

**Physics**

Two equipotential surfaces surround a +1.63 10-8-C point charge. How far is the 204-V surface from the 81.5-V surface? Answer in m.
*February 4, 2013 by Elizabeth*

**general chemistry**

When divers exhale beneath the surface of the water, bubbles rise to the surface. Explain this behavior.
*February 27, 2013 by Donna*

**Physics???**

When the air temperature is below 0 C, the water at the surface of a lake freezes to form a sheet of ice. If the upper surface of an ice sheet 24.2 cm thick is at -10.7 C and the bottom surface is at 0.00 C, calculate the time it will take to add 1.80 mm to the thickness of ...
*December 4, 2007 by Chels*

**math**

Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice or warte, placed on ...
*December 5, 2008 by carl*

**Physics**

A 0.0200 kg bullet moving horizontally at 500 m/s embeds itself into an initially stationary 0.500 kg block. (a) What is their velocity just after the collision? (b) The bullet-embedded block slides 8.0 m on a horizontal surface with a 0.30 kinetic coefficient of friction. Now...
*July 14, 2013 by Amy*

**physics**

Multiple part question….. A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0m above a flat, horizontal beach. With what angle of impact does the stone land (in degrees). A student stands at the edge...
*September 26, 2008 by mb*

**Physics **

You and your friends are doing physics experiments on a frozenpond that serves as a frictionless, horizontal surface. Sam,with mass 80.0 kg, is given a push and slides eastward. Abigail, with mass 50.0 kg, is sent sliding northward. Theycollide and after the collision, Sam is ...
*April 11, 2015 by Olive*

**Physics**

A cart is coasting at a speed v A along a straight and level road. When ten percent of the wagon’s mass is thrown off the wagon, parallel to the ground, and in the forward direction, the wagon stops. However, if this same amount of mass is thrown out the back of the wagon, at ...
*August 7, 2012 by Chad*

**Physics**

Three blocks on a frictionless horizontal surface are in contact with each other A force F is applied to block 1 (m1) Draw a free body diagram for each block ok for the diagram is the force F applied horizontal to mass one does this force act on m2 all the blocks are lines up ...
*July 11, 2009 by Physics*

**physics**

A ball is thrown vertically up from the edge of a 150 m building with a veloicty of 10m/s. (A) how high did the ball rise? (b) how much time did it take fort he ball to reach this height ? (C) what is the velocity oft he ball as it strikest he ground ? (D) how long does it ...
*December 21, 2014 by christoper allen*

**Physics**

A small rock is thrown vertically upward with a speed of 17.0m/s from the edge of the roof of a 22.0m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Air resistance can be neglected. 1. what is the speed of the rock just ...
*June 8, 2015 by Lisa*

**Phyics**

A Rock Is Thrown Vertically upward with a speed of 12m/s. Exactly 1.00s later a ball is thrown up vertically along the same path with a speed of 18m/s. At what time will they strike each other? so far I got this but it does not seem to be working out for me. G=-9.80m/S^2 Y1=0+...
*September 16, 2009 by Joshua*

**General Physics 221**

During heavy rain, a section of a mountainside measuring 2.5 km horizontally, 0.80 km up along the slope, and 2.0m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.40km x 0.40km and that ...
*August 22, 2010 by Mike*

**University Physics**

A 8.3-g bullet, when fired from a gun into a 1.1-kg block of wood held in a vise, penetrates the block to a depth of 7.05cm. This block of wood is next placed on a frictionless horizontal surface, and a second 8.3-g bullet is fired from the gun into the block. To what depth (...
*November 1, 2012 by Anonymous*

**Physics (Newton's laws)**

Two blocks of mass 3.50 kg and 8.00 kg are connected by a massless string that passes over a frictionless pulley. The inclines are frictionless and the angles with the horizontal is 35 degrees. Find a) the magnitute of the acceleration of each block and b) the tension in the ...
*February 15, 2007 by Eric (please help me)*

**physics**

A fighter-jet is in level flight at an altitude of 400m and with a speed of 200m/s. The fighter launches a rocket-powered missile horizontally from the underside of the jet. The rocket engine provided a constant horizontal acceleration of 25.0 m/s^2. a) how far does the ...
*October 3, 2012 by toor*

**Physics**

A 0.243 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.196 kg puck moving initially along the x axis with a speed of 3.16 m/s. After the collision, the 0.196 kg puck has a speed of 2.16 m/s at an angle of 40 to the positive x axis. ...
*April 26, 2012 by Cassidy*

**AP Physics B**

A 0.408 kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.0886 kg puck moving initially along the x axis with a speed of 3.14 m/s. After the collision, the 0.0886 kg puck has a speed of 2.14 m/s at an angle of 38◦ to the positive x axis. ...
*November 1, 2012 by Daisy*

**Physics Classical Mechanics`**

A wheel in the shape of a uniform disk of radius R and mass mp is mounted on a frictionless horizontal axis. The wheel has moment of inertia about the center of mass Icm=(1/2)mpR2 . A massless cord is wrapped around the wheel and one end of the cord is attached to an object of...
*November 14, 2013 by Anonymous*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*July 7, 2010 by Ricky*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*July 7, 2010 by Ricky*

**Phisics (Urgent)!!!!!!!!!!!!!!!!!!!!!!**

A small block of mass m=1 kg glides down (without friction) a circular track of radius R=2 m, starting from rest at height R. At the bottom of the track it hits a massless relaxed spring with spring constant k= 9 N/m, which starts to be compressed as the block continues to ...
*January 12, 2014 by Anonimus*

**Physics**

A 16 kg mass is attached to a cord that is wrapped around a wheel with a radius of 10.9cm. The acceleration of the mass down the frictionless incline is measured to be 1.4 m/s2.The angle of incline is 36 degrees. Assume the axle of the wheel to be frictionless. The force of ...
*March 26, 2010 by Caryn*

**chemistry**

solving problems in bodies thrown vertically downward. solving problems in bodies thrown vertically upward
*January 28, 2012 by mhae*

**Physics**

An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring is a)Mg/A b)MgV_m/2A c...
*March 25, 2007 by Tammy*

**Physics**

I don't understand this at all! use the position equation s=-16t^2 +v0t+s0 to write a function that represents the situation. Find the average rate of change from t1 to t2. a) An object is thrown upward from a height of 6 feet at a velocity of 64 feet per second.... t1=0 , t2...
*October 19, 2015 by Julia*

**Calc 3 Surface Area**

Find the surface area of the indicated surface. 1.) The Portion of z=4y+ 3x^2, between y=2x, y=0 , and x=2 2.) The Portion of z= x^2 + y^2, below z=4 . 3.) The portion of z= sqrt(x^2 +y^2) between y=x^2 and y=4. 4.) The portion of 2x+y+z=8 in the first octant. Any help with ...
*October 22, 2015 by Jay*

**Physics**

A rock is thrown vertically upward with a speed of 12.0 from the roof of a building that is 40.0 above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just before it strikes the ground? The ...
*September 19, 2006 by Morgan*

**science **

when brought to the surface of the moon will a mass have more or less weight than it did on the surface of earth or stay the same ?
*October 8, 2010 by Blaire *

**Physics**

A convex mirror with focal length of -20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?
*December 7, 2010 by Max*

**Physics**

A convex mirror with focal length of -20 cm forms an image 12 cm behind the surface. Where is the object located as measured from the surface?
*December 7, 2010 by Max*

**mechanics**

at what altitude above the earth's surface is the free fall acceleration equal to three quarters of its value at the surface ?
*April 3, 2011 by aliza*

**physics**

a wooding block of mass 7.6kg rest on a rough horizontal surface if the surface is 8N calculate the coefficient of friction
*November 17, 2013 by Allison*

**Trigonometry**

What is the surface area of the cube below? answer in simplest radical form only one surface is 576 cm^3
*December 29, 2013 by Francois*

**Physics**

calculate the work required to launch a satellite from the surface of the earth (radius6380km) to orbit 6000 km above the surface
*February 16, 2014 by Henry*

**physics**

why do cars have head rests?your answer should include the word ''force'' and ''velocity''
*May 16, 2012 by lisa*

**accounting**

the responsibility for issuing a report on a company's internal controls over financial reporting rests with?
*October 14, 2012 by ko*

**Maths A**

$20 000 is invested in a term deposit at 5.4% p.a. with monthly rests. What will be the value of this investment after 3 years?
*June 9, 2013 by Anne*

**physics 101**

A solid uniform disk of mass 21kg and radius 85cm is at rest flat on a frictionless surface. A string is wrapped around the rim of the disk and constant force of 35N is applied to the string, which does not slip on the rim, in the positive x direction. (a) In what direction ...
*April 19, 2012 by Artin*

**Physics**

A block has mass 800 g, whose is fasten to a spring with spring constant k is 70 N/m. The block is pulled a distance x = 15 cm from its equilibrium position at x = 0 on a frictionless surface and released from rest at t = 0. (a) What force does the spring exert on the block ...
*December 18, 2011 by Dia*

**physics**

Your written homework will be graded entirely on the clarity and completeness of your derivation. No credit will be awarded for a final answer without a derivation. As usual, simplify your final answers as much as possible. A giant Pez dispenser of mass m rests on a ladder of ...
*April 11, 2013 by Nick*

**Statistics**

A local McDonald's manager will return a shipment of hamburger buns if more than 10% of the buns are crushed. A random sample of 81 buns finds 13 crushed buns. A 5% significance test is conducted to determine if the shipment should be accepted. The p value for this situation ...
*October 26, 2012 by Meep*

**AP Statistics**

A local McDonald's manager will return a shipment of hamburger buns if more than 10% of the buns are crushed. A random sample of 81 buns finds 13 crushed buns. A 5% significance test is conducted to determine if the shipment should be accepted. The p value for this situation ...
*October 31, 2012 by Meep*

**science**

A child's top is held in place, upright on a frictionless surface. The axle has a radius of r= 2.21 mm. Two strings are wrapped around the axle, and the top is set spinning by applying T= 2.40 N of constant tension to each string. If it takes 0.830 s for the string to unwind. ...
*October 26, 2013 by wafaa*

**physics**

A child's top is held in place, upright on a frictionless surface. The axle has a radius of r= 2.21 mm. Two strings are wrapped around the axle, and the top is set spinning by applying T= 2.40 N of constant tension to each string. If it takes 0.830 s for the string to unwind. ...
*October 27, 2013 by wafaa*

**physics**

A child's top is held in place, upright on a frictionless surface. The axle has a radius of r= 2.21 mm. Two strings are wrapped around the axle, and the top is set spinning by applying T= 2.40 N of constant tension to each string. If it takes 0.830 s for the string to unwind. ...
*October 27, 2013 by wafaa*

**chemistry**

The decomposition of an aldehyde solution in carbon tetrachloride is a first order reaction with a rate constant of 1.20 x 10-3 min-l. If we start with [aldehyde] = 0.0500 molar, what will the concentration be 150 minutes later? a. 0.00900 M b. 0.0418 M c. 0.00926 M d. 0....
*February 17, 2012 by Dom*

**college physics**

A fighter-jet is in level flight at an altitude of 400m and with a speed of 200m/s. The fighter launches a rocket-powered missile horizontally from the underside of the jet. The rocket engine provided a constant horizontal acceleration of 25.0 m/s^2. a) how far does the ...
*October 3, 2012 by toor*