Friday

March 6, 2015

March 6, 2015

Number of results: 52,332

**physics**

A mass of 8.10 kg is suspended from a 1.69 m long string. It revolves in a horizontal circle as shown in the figure. The tangential speed of the mass is 2.92 m/s. Calculate the angle between the string and the vertical.
*February 17, 2011 by Sarah*

**Physics**

Lubricating oil, with a relative density of 0.79, flows around a 90¨¬ bend. The pipe diameter is 0.45m, and the oil has a pressure head of 7m and the flow is 1.7m3/s. Find the force exerted by the oil on the bend. Oil density = 0.79 X 103 Volumetric mass flow rate = 1.7 m3/s ...
*April 22, 2009 by Henri*

**Physics**

Lubricating oil, with a relative density of 0.79, flows around a 90¨¬ bend. The pipe diameter is 0.45m, and the oil has a pressure head of 7m and the flow is 1.7m3/s. Find the force exerted by the oil on the bend. Oil density = 0.79 X 103 Volumetric mass flow rate = 1.7 m3/s ...
*April 23, 2009 by Henri*

**Math word problem check**

The Mad River flows at a rate of 3 km/h. In order for a boat to travel 78.2 km upriver and then return in a total of 8 hr, how fast must the boat travel in still water? what formula would be used to solve this problem? I used the formula of V = D/T T = D/V, you know that 78.2...
*November 9, 2008 by Shawn*

**Algebra 1**

The first of three pipes fills a tank in 12 minutes and a second pipe in 10 minutes.If both these pipes and also a third pipe are open, the tank is filled in 4 minutes. How many minute will the third pipe alone require to fill the tank? Just need an equation. Thank you!
*February 22, 2013 by NEED HELP NOW!!*

**physics**

When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure P8.16a. The total gravitational force on the body, Fg, is supported by the force n exerted by the floor on the toes of one foot. A mechanical model of the situation is shown ...
*October 23, 2010 by rabhimself*

**math/hurry**

A plumber needs four sections of pipe 2 7/8 feet long. Can this be cut from a 12 foot section? If so, how much pipe will be left over? If not, why not?
*March 26, 2010 by Kirk*

**college physics**

Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide away together after ...
*February 24, 2011 by lala*

**college physics**

Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide away together after ...
*February 24, 2011 by lala*

**physics**

A satellite that is spinning clockwise has four low-mass solar panels sticking out as shown; the mass of the satellite is 750 kg. A tiny meteor of mass 2 kg traveling at high speed rips through one of the solar panels and continues in the same direction but at reduced speed. ...
*June 9, 2011 by Daiyo*

**Physics**

The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a height of 0.87 m above the floor. When m1 hits the ground its speed is 1.4 m/s. Assume that the pulley is a uniform disk with a radius of 12 cm. ...
*March 8, 2010 by Mary*

**Physics**

The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a height of 0.91 m above the floor. When m1 hits the ground its speed is 1.5 m/s. Assume that the pulley is a uniform disk with a radius of 12 cm. ...
*March 8, 2010 by Jon*

**Physics**

The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in the figure are released from rest, with m1 at a height of 0.91 m above the floor. When m1 hits the ground its speed is 1.0 m/s. Assume that the pulley is a uniform disk with a radius of 12 cm. ...
*November 14, 2014 by Kim*

**physics**

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 22.0 m/s. The cliff is h = 23.0 m above a flat horizontal beach, as shown in the figure below.
*September 27, 2010 by Erin*

**physics**

In the apparatus shown in the figure (Figure 1) , m1 = 10kg and the coefficients of static and kinetic friction between m1 and the table are 0.69 and 0.32, respectively. Part A What mass of m2 will just barely set the system in motion?
*October 3, 2013 by tom*

**problem solving**

Suppose water flows from a shower at a rate of 0.38 cubic feet per minute. Do you use more water by taking a 14-minute shower or by filling a bathtub with 0.6 cub yards of water, and by how much? Demonstrate strep-by-step solution.
*December 8, 2012 by ben*

**Physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**Physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**p**

A newly planted tree is supported against the wind by a rope tied to a stake in the ground, as shown in the figure below. The force of the wind, though distributed over the tree, is equivalent to a single force F, as shown in the figure. Find the tension in the rope. Assume ...
*March 26, 2012 by JOHN*

**geometry**

a hollow cylindrical pipe is 21m long .its outer and inner diameters are 10 cm and 6cm respectively .find the volume of copper used in making the pipe?/
*February 25, 2012 by Anonymous*

**physics**

A ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?
*March 19, 2011 by laila*

**physics**

ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?
*March 20, 2011 by Anonymous*

**Physics**

A 67.0 kg person, standing on a diving board, dives straight down into the water. Just before striking the water, her speed is 5.50 m/s. At a time of 1.75 s after she enters the water, her speed is reduced to 1.10 m/s. What is the net average force (magnitude and direction) ...
*March 18, 2012 by Foxxi*

**Physics Questions Help Please!**

1) The lowest tone to resonate in an open pipe of length L is 1600 Hz. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L? a) 100 Hz b) 1.60 Hz c) 200 Hz d) 0.800 kHz 2) Which of the following does not increase as a sound becomes louder? ...
*December 5, 2014 by Kimberly *

**physics**

A puck on a horizontal, frictionless surface is attached to a string that wraps around a pole of finite radius, as shown in the figure . As the puck moves along the spiral path, does its speed increase, decrease, or stay the same?
*January 22, 2012 by Patrick*

**physics**

Water flows through a horizontal tube of diameter 2.9 cm that is joined to a second horizontal tube of diameter 1.5 cm. The pressure difference between the tubes is 7.2 kPa. Find the speed of flow in the first tube.
*December 4, 2011 by jazz*

**math- word problems**

I tried doing this problem but i just dont get it: A boy has 16 coins consisting of nickles, dimes, and quarters. The number of nickles is 3 less than the number of dimes and the value of the quarters is 55 cents greater than the value of the dimes. How many coins of each kind...
*September 24, 2008 by kayla*

**physics**

trying to raise a barrel using sections of pipe.The three objects are horizontal cylinders resting on level ground. The barrel has a mass of 100 kg and its diameter is 2.0m. Each pipe has a diameter of 0.50 m. What minimum horizontal force must his feet exert on the pipe to ...
*October 19, 2011 by John*

**Physics HELP!!**

A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 200 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal (see figure). The ...
*November 20, 2013 by bob*

**Computer science**

Write an HTML form that prompts the user to enter loan amount, interest rate, and number of years, as shown in Figure 1. Clicking the Compute Payment button invokes a JSP program to compute and display the monthly and total loan payments, as shown in Figure 2. Use the Loan ...
*July 21, 2013 by AN3852*

**physics**

Water flows through a horizontal tube of diameter 2.9cm that is joined to a second horizontal tube of diameter 1.5 cm. The pressure difference between the tubes is 7.2 kPa. A)Find the speed of flow in the first tube.
*December 4, 2011 by jazz*

**physics**

The three charges shown in Figure P16.17 are at the vertices of an isosceles triangle. If q = 16.0 10-9 C, calculate the electric potential at the midpoint of the base. V Figure P16.17
*May 15, 2012 by Paige*

**Physics**

"Water flows over a section of Niagara Falls at the rate of 1.2*10^6 kg/s and falls 50.0m. How much power is generated by the falling water?" It's a the kg/s that is confusing me. I don't know how to work with it.
*July 25, 2010 by Stuck*

**calculus**

A conical tank has height 3 m and radius 2 m at the top. Water flows in at a rate of 1.4 \text{m}^3\text{/min}. How fast is the water level rising when it is 2.6 m?
*March 7, 2014 by MEMO*

**English**

The towns water pipe was in the way of the new bridge
*February 4, 2013 by Tajuan parks*

**Physics**

A circuit is composed of a capacitor C=3 μF, two resistors both with resistance R=69 Ohm, an inductor L=6.00e-2 H, a switch S, and a battery V=25 V. The internal resistance of the battery can be ignored . Reminder: The "L=x.xxenn H" notation means "L=x.xx×10nn H". (The ...
*June 17, 2013 by AAA*

**Algebra HELP!**

Ryan is building matchstick square sequences, as shown ( first figure used 4, second figure used 7, third figure used 10, and the forth figure used 13). He used 599 matchsticks to form the last two figures in his sequences. How many matchsticks did he use in each of the last ...
*November 6, 2014 by A*

**Calculus**

If water is lost at 20ft^3/day when W= 10,000 ft^3 then the leakage rate constant in the differential equation is 20/10,000 or 0.002. Suppose that water flows in at F= 200,000 ft^3/day. How much water would you predict in the lake after 100 days?\ W = Ce^(-kt)
*February 7, 2010 by Lara*

**physics**

In a spray can,the flow of air makes paint flow up the tube. As the air flows, it is blown away in droplets. A)as the air flows what happens to its speed and pressure? Why? B)why does the paint flow up the tube?
*June 9, 2014 by Haiano*

**Physics**

Two balls of the same volume are released inside a tank filled with water as shown in the figure. The densities of balls A and B are 0.86 g/cm3 and 0.55 g/cm3. (The density of water is 1.00 g/cm3. Take the +y direction to be up. Indicate the direction with the sign of your ...
*November 7, 2011 by mymi*

**math**

Suppose water flows from a shower at a rate of 0.32 cubic feet per minute. Do you use more water by taking a 12-minute shower or by filling a bathtub with 0.4 cubic yards of water, and by how much?
*September 28, 2013 by Anonymous*

**Physics**

I did a lab in which we were to find the 1st resonance and 2nd resonance and from them we found wavelength which in turn helped us find speed of sound. We used tuning forks and the frequancy was given. We besically moved a plastic tube which was in water up along with he ...
*March 8, 2009 by Lena*

**physics**

Water flows through a horizontal tube of diameter 2.6cm that is joined to a second horizontal tube of diameter 1.7cm . The pressure difference between the tubes is 8.0kPa.Find the speed of flow in the first tube.
*January 30, 2011 by Sid*

**math**

Water is flowing at the rate of 15km/hr. Through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide.In how many hours will the water label in the tank raised by 21cm
*March 7, 2014 by Aashi*

**physics**

The spring of the pressure gauge shown in the figure below has a force constant of 1,160 N/m, and the piston has a radius of 1.22 cm. As the gauge is lowered into water, what change in depth causes the piston to move in by 0.750 cm?
*November 3, 2012 by keli*

**physics**

The spring of the pressure gauge shown in the figure below has a force constant of 1,080 N/m, and the piston has a radius of 1.43 cm. As the gauge is lowered into water, what change in depth causes the piston to move in by 0.750 cm?
*November 26, 2012 by dale*

**Math**

On a site plan for a new house, a water main runs along the edge of the property straight from point W(10, 34) to point M(2, 2). The water service will enter the house at point H(24, 22). The grid intervals on the plan represent 0.5m. A) At what point on the water main should ...
*January 14, 2011 by Afreesh*

**Physics**

An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section of the pipe is 4.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s. The pressure of the fluid in the wide section is 250...
*November 10, 2013 by Mikhail*

**physics**

A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream with water speed equal ...
*February 22, 2012 by micheal*

**physics**

A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream with water speed equal ...
*February 22, 2012 by micheal*

**Physics**

The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.07 m. The maximum speed of the discus is 19.0 m/s. Determine the magnitude of the maximum radial acceleration of the discus.
*February 5, 2011 by Snooki*

**Physics**

A disk with a mass of 13 kg, a diameter of 25 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...
*October 25, 2010 by Donny*

**physics**

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...
*February 16, 2011 by Anonymous*

**physics**

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...
*February 18, 2011 by Anonymous*

**Physics Classical Mechanics**

A gyroscope consists of a uniform disc of mass radius M= 2 kg and radius R= 0.2 m . The disc spins with an angular speed ω= 300 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal (see figure). The ...
*November 14, 2013 by Anonymous*

**Physics 1**

Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the kinetic energy of the roller coaster's wheels. Assume the roller coaster starts with a speed of 19 m/s at point A. Find the speed of the roller ...
*October 8, 2012 by John *

**Physics**

The spring of the pressure gauge shown in the figure below has a force constant of 1 100 N/m, and the piston has a diameter of 1.00 cm. As the gauge is lowered into water in a lake, what change in depth causes the piston to move in by 0.550 cm?
*January 28, 2011 by Danielle*

**Physics**

A 19.5 gram, 56.3 centimeter long steel guitar string is vibrating in its fourth harmonic.Â It induces a standing wave in a nearby 48.6 centimeter metal pipe open at one end.Â The standing sound wave in the pipe corresponds to the pipe's fundamental frequency. Â What is the...
*November 23, 2012 by Alphonse*

**Repost-Physics 1**

Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the kinetic energy of the roller coaster's wheels. Assume the roller coaster starts with a speed of 19 m/s at point A. Find the speed of the roller ...
*October 9, 2012 by John*

**Physics**

TURNTABLE SOLUTIONS A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 400 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the ...
*November 24, 2013 by Anon*

**college physics**

Two blocks are arranged at the ends of amassless string as shown in the figure. The system starts from rest. When the 1.67 kg mass has fallen through 0.395 m, its downward speed is 1.31 m/s. The acceleration of gravity is 9.8 m/s2. What is the frictional force between the 3.34...
*February 16, 2011 by billy*

**Physics**

A student is swinging a 9 kg ball in a circular path in the vertical plane. Consider the instant when the string is horizontal as the ball is on its way up as shown in the figure. At this instant, the instantaneous tangential speed is 6 m/s, and the radius is 6 m. What is the ...
*October 12, 2014 by Ashleigh*

**Physics**

Look up or derive the frequencies of the standing waves of a length of wire, L, clamped at the ends and under tension. What are the similarities and differences between a vibrating string and a resonating pipe? Does the diameter of the wire matter? Does the diameter of the ...
*February 8, 2007 by Krys*

**Calculus**

Consider a circle of radius 5 and a point P rotating around it, as shown in the figure to the left, below. The angle(theta) , in radians, is given as a function of time t, by the graph in the second figure. What is the value of when t=0.5? Find the coordinates of P when t=0.5
*February 1, 2011 by Sachenka*

**SCI 275**

help please! CLASS - Please see the attached figure. How do the three factors shown in the figure interact to promote sustainable development? [img src="@7140725"]
*November 9, 2007 by dawn*

**Physics**

A stream of water flows through a small hole at depth h = 10 cm in a tank holding water to height H =40 cm. At what distance x (in cm) does the stream strike the floor? (Neglect air resistance).
*March 14, 2014 by yana*

**Physics**

As shown in the figure below, a bullet is fired at and passes a piece of target paper suspended by a massless string. The bullet has a mass of m, a speed v before the collision with the target, and a speed (0.466)v after passing through the target. The collision is inelastic ...
*November 2, 2014 by Ellen Q*

**math**

A pool of water with surface area of 0.6 hectares has a uniform depth of 3 metres.A pipe drains water in the pool at the rate of 200 litres per second.How much hours does it take to empty the pool?
*August 19, 2011 by Charles*

**Earth Science**

A sphere was dropped into water in a graduation cylinder as shown in the following diagram. The water level rose to the new level shown. {before: 40mL, after: 65mL} What is the volume of the sphere? (1)15mL (2)25mL (3)40mL (4)65mL (2)?
*June 18, 2008 by Anonymous*

**Fluid Mechanics**

Water at 600F flows steadily through a horizontal circular divergent duct and discharges into the atmosphere as shown. A manometer with a fluid of SG=2.0 is placed between the two cross-sections with diameters D1 = 0.5 ft and D2 = 0.7 ft. Assuming inviscid flow, determine: (a...
*June 11, 2012 by Bob*

**physics**

Two boat landings are 8.0 km apart on the same bank of a stream that flows at 2.8 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water? I think it is something along the lines of 4/t+2.8 + 4/t-2.8 =5...
*August 10, 2014 by Delilah *

**Physics **

How Many Capillaries? The aorta has an inside diameter of approximately 2.1 cm, compared to that of a capillary, which is about 1.0×10−5m (10 μm). In addition, the average speed of flow is approximately 1.0 m/s in the aorta and 1.0 cm/s in a capillary Assuming that ...
*April 17, 2014 by Brady*

**classical mechanics**

A hydrometer is a device that measures the density of a liquid. The one shown in the figure has a cylindrical bulb of radius attached to a cylindrical stem of radius and length . When placed in a liquid, the device floats as shown in the figure with a length of stem protruding...
*December 10, 2013 by socorro*

**physics**

A 50 kg crate is pushed at constant speed up the frictionless 31° ramp shown in the figure. A)What horizontal force F is required? B)What force is exerted by the ramp on the crate?
*February 21, 2012 by Steve*

**physics**

A)A 90 kg crate is pushed at constant speed up the frictionless 34° ramp shown in the figure. What horizontal force F is required? B)What force is exerted by the ramp on the crate?
*February 12, 2014 by Tsion*

**physics **

The length of a pipe, closed at one end is is 90 cm. Calculate the frequency of the standing wave. What is the fundamental frequency of the pipe?
*December 14, 2012 by amy *

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*November 11, 2012 by Anonymous*

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*November 11, 2012 by Anonymous*

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*November 11, 2012 by Anonymous*

**physcis**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*November 12, 2012 by Anonymous*

**Physics**

Calculate the first thhree standing wave frequencies of an open pipe 40 cm long. Do the same for a closed pipe 40 cm long?
*December 8, 2011 by Margaret alire*

**MATHS**

A cylindrical water tank of diameter 1.4m and height 2.1m is being feed by a pipe of diameter 3.5cm through which water follows at the rate of 2m/per second . In how much time the tank will be filled ???
*November 24, 2012 by TUHITUHI*

**College Math**

An inlet pipe on a swimming pool can be used to fill the pool in 24 hours. The drain pipe can be used to empty the pool in 40 hours. If the pool is one-third filled and then the drain pipe is accidentally opened, how long will it take to fill the pool?
*July 3, 2011 by Lamont*

**General Physics**

A 0.377 kg bead slides on a curved wire, starting from rest at point A(4.8 meters) as shown in the figure. The acceleration of gravity is 9.8 m/s2 . A. If the wire is frictionless, find the speed of the bead at B(0 Meters). Answer in units of m/s B. Find the speed of the bead ...
*July 26, 2013 by Charles*

**physics**

Water flows through a horizontal tube of diameter 2.7 cm that is joined to a second horizontal tube of diameter 1.9 cm. The pressure difference between the tubes is 7.6 kPa. Find the speed of flow in the first tube. v_1 = ? m/s I've tried using P_1 + .5 * density * v_1^2 = P_2...
*December 8, 2011 by Trent*

**math**

A cross section of a hollow circular pipe shows that its inner diameter is 2 1/10 inches and that the pipe is 3/5 inch thick. What is its outside diameter?
*March 23, 2011 by JUNIOR C*

**math**

a cross section of a hollow circular pipe shows that its inner diameter is 2 1/10inches and that the pipe is 3/5inch thick. what is the outside diameter
*April 18, 2011 by rachel*

**physics**

A piece of pipe has an outer radius of 4.6 cm, an inner radius of 2.8 cm, and length of 35 cm. What is the mass of this pipe? Assume its density is 8.3 g/cm3. Answer in units of k
*January 26, 2013 by sarah*

**Math**

Tom needs a pipe that is 21/24 of an inch in diameter. The store has 7/8 inch pipe. Should he buy it?
*June 27, 2012 by Angel*

**College Physics**

A hockey puck is sliding down an inclined plane with angle θ = 12.4° as shown in the figure below. If the puck is moving with a constant speed, what is the coefficient of kinetic friction between the puck and the plane?
*October 13, 2014 by Shannon*

**Physics**

Two masses Ma= 2.0 and Mb= 5.0 are on inclines and are connected together by a string as shown in the figure(Figure 1) . The coefficient of kinetic friction between each mass and its incline is u= 0.30. If Ma moves up, and Mb moves down, determine their acceleration.
*June 29, 2012 by Truman*

**Physics**

How do you solve this problem? A ball on the end of a string is revolved at a uniform rate in a vertical circle radius of 72.0 cm, as shown in figure. If its speed is 4.00m/s and its mass is .300 kg. Calculate the tension in the string when the ball is a) at the top of the ...
*February 21, 2011 by Emily Grossman*

**PHYSICS**

3. A particle of mass m= 5.00 kg is released from point A(at rest) and slides on the frictionless track shown in Figure below. Determine: ( 8 marks ) a. the particleâ€™s speed at points B and C and (4marks) b. the net work done by the gravitational force in moving the ...
*April 27, 2013 by VICTOR LAKAKI*

**Math**

An inlet pipe on a swimming pool can be used to fill the pool in 24 hours. The drain pipe can be used to empty the pool in 40 hours. If the pool is one-third filled and then the drain pipe is accidentally opened, how long will it take to fill the pool?
*July 3, 2011 by Lamont*

**math**

An inlet pipe on a swimming pool can be used to fill the pool in 28 hours. The drain pipe can be used to empty the pool in 42 hours. If the pool is one-third filled and then the drain pipe is accidentally opened, how long will it take to fill the pool?
*July 10, 2011 by brian*

**Physics**

A stone is aimed at a cliff of height h with an initial speed of v = 60.0 m/s directed 25.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 4.30 s after launching. What is the height of the cliff?
*September 16, 2012 by jameson*

**Physics**

A stone is aimed at a cliff of height h with an initial speed of v = 56.0 m/s directed 65.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 9.20 s after launching. What is the height of the cliff?
*November 14, 2013 by steeve*

**Physics**

The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.09 m/s. He starts from the south bank of the river and wants to reach the north bank by travelling straight across the river. The boat has a speed of 6.44 m/s with respect to ...
*January 27, 2015 by Chris*

**physics**

Two boat landings are 3.0 km apart on the same bank of a stream that flows at 1.6 km/h. A motorboat makes the round trip between the two landings in 50 minutes. What is the speed of the boat relative to the water? How do I factor in the fact that velocity is subtracted by 1.6 ...
*August 10, 2014 by Sally*

**Need Help Physics**

The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.09 m/s. He starts from the south bank of the river and wants to reach the north bank by travelling straight across the river. The boat has a speed of 6.44 m/s with respect to ...
*January 29, 2015 by Anonymous*

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