Number of results: 63,581

**math**

A conical water tank with vertex down has a radius of 13 feet at the top and is 28 feet high. If water flows into the tank at a rate of 10 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?

*November 3, 2015 by PAT*

**Physics**

Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table ...

*March 6, 2013 by Heidi*

**Finance**

If depreciation is not a cash flow item, why does it affect the level of cash flows from a project in any way? Why are we interested only in incremental cash flows rather than total cash flows?

*January 25, 2011 by sasha*

**Physics**

The fundamental of an organ pipe that is closed at one end and open at the other end is 261.6 Hz ( middle C ). The second harmonic of an organ pipe that is open at both ends has the same frequency. What are the lengths of the pipe? I tried solving it and I got 0.65 and 0.98 ...

*August 6, 2011 by AfterLife*

**Engineering**

Your green house irrigation sytem is plumbed with 3/4" pvc pipe from which 1/2" branch lines are routed to each row of plants. if the city supplies water that flows at 3ft/sec what is the velocity of the water at plants level? WEhat is the flow rate in gallons per min at plant...

*September 10, 2006 by Matt*

**math - calc**

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?

*October 1, 2013 by Greg*

**math - calc**

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?

*October 1, 2013 by Greg*

**Calculus (math)**

A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?

*October 25, 2014 by mariel*

**Physics**

You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that will be approximately...

*April 27, 2010 by jesse*

**Physics**

You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that will be approximately...

*April 29, 2010 by jesse*

**Chemistry**

calculate the density of an aluminum pipe if the mass of the aluminum is 37g and the level of the water ina graduated cylinder increased by 11.0 mL when the pipe is submerged in the graduated cylinder. then calculate the percent error of the experimental value if the reference...

*May 29, 2013 by Scotty*

**physics**

A 17 kg rock, m, is on the edge of a 105 m cliff, h, as shown in Figure 11-20. Assume that air resistance is negligible. What speed does the rock have as it strikes the ground?

*January 10, 2013 by Noah*

**Fluids in motion**

Lubricating oil, with a relative density of 0.79, flows around a 90º 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.

*March 20, 2009 by Henri*

**Physics Urgent please help**

A spring of negligible mass, spring constant k = 82 N/m, and natural length l = 1.2 m is hanging vertically. This is shown in the left side where the spring is neither stretched nor compressed. In the central one, a block of mass M = 5 kg is attached to the free end. When ...

*October 15, 2013 by ss01*

**electromagnetism**

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

*March 28, 2015 by abdulhayi musa*

**electromagnetism**

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

*March 28, 2015 by abdulhayi musa*

**physics**

Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 4.01 kg mass has fallen through 0.412 m, its downward speed is 1.3 m/s. The acceleration of gravity is 9.8 m/s 2 .

*December 9, 2015 by zach*

**Physics/mats**

Two blocks with masses m1 = 1.40 kg and m2 = 3.00 kg are connected by a massless string, as shown in the Figure. They are released from rest. The coefficent of kinetic friction between the upper block and the surface is 0.390.In the figure m1 is on top of a horizontal table ...

*March 7, 2013 by HP*

**Physics**

2. A pool has an area A = 50 m2 and depth h = 2.5 m. The pool is filled with water to the maximum height. An electrical pump is used to empty the pool. There are two pipes coming out the pump: one is submerged into water has a radius r1 = 4 cm the other has a radius r2 = 2.5 ...

*April 13, 2012 by Sean*

**Physics**

Two blocks are connected by a string as shown in the figure. What is the acceleration, assuming there is no friction? (Draw the figure and proceed).

*October 5, 2010 by Anonymous*

**physics**

A tank of height H is filled with water and sits on the ground, as shown in the figure. Water squirts from a hole at a height y above the ground and has a range R. For two y values, 0 and H, R is zero. Determine the value of y for which the range will be a maximum. (Use any ...

*April 16, 2011 by HELP!!!!HELP!!!!*

**math**

how do you figure out the diameter of a pipe that is 40 feet high and holds 200000 gallons

*October 23, 2012 by becky*

**Physics please help?????**

Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of the figure, at an altitude h of 450 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90.0 s ahead of Picard, the commander of the other ship. At point P in ...

*May 13, 2014 by Janis*

**phsyics**

A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal. Use the information given in the ...

*December 16, 2010 by Lisa*

**Physics**

A river flows at a speed of 4.60 m/s. A boat, capable of moving with a speed of 5.80 m/s in still water is rowed across the river at an angle of 53.0° to the river flow. Calculate the resultant velocity with which the boat moves and the angle that its resultant motion makes ...

*February 7, 2015 by Alex*

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

*December 7, 2015 by Daniel*

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

*December 7, 2015 by Andrew*

**math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

*March 23, 2017 by James*

**Physics**

A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s.What is the frequency of the standing wave shown in the figure? picture has 6 waves

*November 8, 2009 by Unknown*

**Calculus**

A water tank is shaped like an inverted right circular cone with a base radius of 14 feet and a height of 25 feet high. If water flows into the tank at a rate of 20 ft^3/min, how fast is the depth of the water increasing when the water is 18 feet deep?

*April 3, 2012 by Joe*

**Algebra**

Two pipes fill a storage tank in 9 hours. If the larger pipe fills the tank three times as fast as the smaller one, how long would it take the larger pipe to fill the tank alone? In terms of your variable, what fraction of the tank is filled in 1 h by the larger pipe alone? By...

*May 9, 2014 by Anonymous*

**Physics**

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0013 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.2 102 ft/s, find the average force ...

*October 17, 2012 by Emily*

**physics**

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0013 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.2X10^2 ft/s, find the average force ...

*October 17, 2012 by Emily*

**Physics**

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0049 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.1 102 km/h, find the average force ...

*August 14, 2014 by Dhruba*

**Chemistry 101**

What is the mass of water (in grams and pounds). contained in a 100. foot long pipe that has an internal diameter of 6.5 centimeters? The density of water is 1.00 g/ cm^3. The volume of a cylinder is (pi)r^2L.

*January 18, 2016 by Lilly*

**Chemistry 101**

What is the mass of water (in grams and pounds). contained in a 100. foot long pipe that has an internal diameter of 6.5 centimeters? The density of water is 1.00 g/ cm^3. The volume of a cylinder is (pi)r^2L.

*January 19, 2016 by Lilly*

**Thermodynamics**

A 10m height cylinder with cross sectional area of 0.1 m2 has a massless piston at the bottom as shown in Figure Q2. Water is at the top of the piston with air at 20oC over it. Under the piston there is air at 300K. The volume of the air is 0.3m3. Heat is now transferred to ...

*April 14, 2014 by Hao*

**Thermodynamics**

A 10m height cylinder with cross sectional area of 0.1 m2 has a massless piston at the bottom as shown in Figure Q2. Water is at the top of the piston with air at 20oC over it. Under the piston there is air at 300K. The volume of the air is 0.3m3. Heat is now transferred to ...

*April 14, 2014 by Hao*

**calculus**

A conical tank has height 3m and radius 2m at the top. Water flows in at a rate of 2m^3 /min. How fast is the water level rising when it is 2m.

*September 29, 2010 by esma*

**Physics**

Water flows over a section of a waterfall at the rate of 4.9 104 kg/s and falls 36 m. How much power is generated by the falling water?

*November 4, 2010 by MRock*

**physics**

Water flows over a section of a waterfall at the rate of 5.4 104 kg/s and falls 38 m. How much power is generated by the falling water?

*November 8, 2011 by dale*

**Physics**

1. A stroboscopic photo of a club hitting a golf ball, such as the photo shown in Figure 6.3, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the club for about 0.0022 s. Also, the ball was found to end up with ...

*November 6, 2010 by justin*

**Math**

Pipes A & B can fill a storage tank in 8hours and 12 hours, respectively . With the tank empty ,pipe A was turned on at noon, and then pipe B was turned on at 1:30 P.M.At what time was the tank full. Please help me!! Let V be the tank volume. Pipe A fills at (1/8 V) per hour ...

*December 5, 2006 by Ronald*

**ALGEBRA**

In a water refilling stationthe time that a pipe takes to fill a tank is 10 minutes more than the time that another pipe takes to fill the same tank. If the two . If the two pipes are open at the same time, they can fill the tank in 12 minutes. How many minutes does each pipe ...

*July 21, 2015 by Sylvia*

**Physics**

A 1200-N crate is being pushed across a level floor at a constant speed by a force of 260 N at an angle of 20.0° below the horizontal. (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 260 N force is instead pulling the block at an ...

*September 18, 2011 by Elaine Jetton*

**geometry**

The height of the figure shown at the right is 20 inches, and the width of the figure is 10 inches. All the line segments are either vertical or horizontal. Calculate the perimeter of this figure. a.30 inches b.50 inches c.60 inches d.Cannot be determined from the given ...

*February 28, 2012 by Anonymous*

**Physics**

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0037 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.7 102 ft/s, find the average force ...

*October 4, 2011 by Allie*

**Physics**

A 2 kg steel ball strikes a wall with a speed of 8.15 m/s at an angle of 54.4◦ with the normal to the wall. It bounces off with the same speed and angle, as shown in the figure. If the ball is in contact with the wall for 0.243 s, what is the magnitude of the average ...

*November 2, 2011 by Seth*

**Physics**

Three sources of sound are distributed along a line, as shown in the figure. v is the speed of sound. Source A is at rest, and it emits sound waves with a frequency of 480 Hz. Source B is traveling at v/5 to the right, and it emits sound waves with a frequency of 960 Hz. ...

*September 3, 2013 by Ben*

**physics**

A horizontal pipe of diameter 0.845 m has a smooth constriction to a section of diameter 0.507 m. The density of oil flowing in the pipe is 821 kg/m3 . If the pressure in the pipe is 8350 N/m2 and in the constricted section is 6262.5 N/m2 , what is the rate at which oil is ...

*June 17, 2011 by ryan*

**Earth science**

A sphere was dropped into water in a graduated cylinder as shown in the following diagram.The water level rose th the new level shown .What is the volume of the sphere

*September 28, 2014 by Anonymous*

**physics**

why does an ideal fluid move faster through a pipe with decreasing diameter? a. the pressure within the fluid increases b. the pressure within the fluid decreases c. the pipe exerts more pressure on the fluid d. the fluid moves downhill C? the pressure in a fluid is related to...

*February 18, 2009 by y912f to bobpursley*

**physics**

A jet of water squirts out horizontally from a hole near the bottom of the tank, as seen in the figure below. Assume that y = 1.19 m and x = 0.544 m. What is the speed of the water coming out of the hole? The hole has a diameter of 3.06 mm. What is the height, h, of the water ...

*March 5, 2012 by Jackie*

**Physics**

Organ pipe A, with both ends open, has a fundamental frequency of 225 Hz. The third harmonic of organ pipe B, with one end open, has the same frequency as the second harmonic of pipe A. How long are

*April 14, 2016 by HeLp*

**Physics**

A man can swim in still water at a speed of 3km/hr.He wants to cross the river that flows at 2km/hr and reach the point directly opposite to his starting Point.find the angle if his body makes with the river flow.

*August 21, 2015 by Anonymous*

**MATH**

A PIPE 3 7/8 IN LONG IS TO BE CUT FROM A 5 1/16. WHAT IS THE LENGTH OF PIPE THT REMAINS

*March 11, 2011 by JUNIOR C*

**math**

you have a 2.5 od pipe can you get the same flow from two 1.and a quarter od pipe

*March 29, 2014 by billy*

**Physics**

A boat moves north at a uniform velocity of 15 mph relative to the shore from one side of the river to a point directly opposite on the other side of the river. The water in the river flows east at a constant speed of 5mph parallel to the shore. What is the velocity of the ...

*November 1, 2013 by Tsunayoshi*

**math**

A pottery factory needs to connect with the main gas pipe line. This pipeline is on the other side of a stream. A gas line must be run from the main line junction to the factory at the lowest possible cost. It costs $12.50 per foot to run pipe under water and $9.00 per foot to...

*December 22, 2009 by Jake*

**physics**

A 1500kg car is approaching the hill shown in the figure at 15.0 m/s when it suddenly runs out of gas. Part A What is the car's speed after coasting down the other side?

*November 26, 2012 by kelly*

**physics**

A 1,160-N crate is being pushed across a level floor at a constant speed by a force vector F of 310 N at an angle of 20.0° below the horizontal, as shown in the figure (a) below.

*February 25, 2014 by Anonymous*

**physics**

Water flows over a section of a waterfall at the rate of 5.1 104 kg/s and falls 40 m. How much power is generated by the falling water? answer in Watts thanks

*January 26, 2013 by Lauren Miller*

**Physics**

I've been working on this problem for close to an hour now and keep getting very wrong numbers... The two objects with different mass (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in the figure are released from rest, with one object at a height of 0.91 m above ...

*April 20, 2014 by Confused*

**Physics**

A man can row a boat at a speed of 2metres per second . The man set out to row the boat in a river from A to B. The water in the river flows 0.8metres per second in the opposite direction.Determine the velocity of the boat through the water.

*December 30, 2016 by Faith*

**Physics**

A lighthouse that rises h = 50 ft above the surface of the water sits on a rocky cliff that extends 19 ft from its base, as shown in the figure. A sailor on the deck of a ship sights the top of the lighthouse at an angle of θ = 28.0° above the horizontal. If the sailor's...

*September 16, 2012 by Kabe*

**Math**

A conical water tank with vertex down has a radius of 10 feet at the top and is 22 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 14 feet deep? I have tried several times but ...

*October 5, 2014 by Sarah*

**Math**

A conical water tank with vertex down has a radius of 10 feet at the top and is 22 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 14 feet deep? I have tried several times but keep ...

*October 5, 2014 by Sarah*

**Maths**

3 inlet pipes A,B and C can be used to fill 1000m^3 water storage tank . When 3 pipes are in operation,the tank can be filled in 10hours .When only pipes A and B are used,the time increases to 20 hours. With pipe A and C, the tank can be filled in 12.5 gourde. By using Gauss ...

*July 26, 2015 by Rainie*

**Math (Quadratic Equations)**

Two pipes that are open at the same time can fill a pool in 12 hours. When only Pipe A is open, it can fill the pool 7 hours longer than when only Pipe B is open. Find how long Pipe A can fill the pool when it is the only pipe open?

*July 6, 2016 by John*

**water treatment**

what is the water flow ratein a 24 in. diamiter pipe in gpm. when the flow velocity is 3.0 ft per second

*July 1, 2012 by Anonymous*

**physics**

A power station with an efficiency of 0.35 generates 10^8 W of electric power and dissipates 1.86 ✕ 10^8 W of thermal energy to the cooling water that flows through it. Knowing the specific heat of water in SI units is 4184 J/kg°C, calculate how many kilograms of water...

*July 16, 2014 by boy*

**physics**

The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. As shown is the figure, a polar bear climbs onto a piece of ice, which has a volume of 5.75 m3, and is floating in sea water. a) What is the mass of the piece of ice? b) What is the mass of the ...

*March 9, 2013 by Chris*

**Calculus**

A pipe in the shape of a right-angle elbow contains a vertical section and a horizontal section with a valve at the right angle. Presently the valve is closed and the vertical section of the pipe contains a column of water having length L. When the valve is opened, the amount ...

*August 7, 2011 by Jane*

**physics**

An organ pipe is 84 cm long and at a temperature of 20 degrees C. What is the fundamental (in Hertz) if the pipe is closed at one end thanks!

*May 14, 2013 by BG*

**math**

if the total surface area of a pipe is 396 cm^2 and its height is 14 cm.find the diameter of the pipe.any one to help me please

*August 24, 2016 by kelvin*

**physics**

An organ pipe is 81 cm long and at a temperature of 20 degrees C. What is the fundamental (in Hertz) if the pipe is closed at one end?

*December 5, 2016 by kassy*

**physics**

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 55 m above the water's surface, as shown below. How long does it take for the stone to fall to the water?

*December 9, 2009 by andrew*

**Physics**

A solid sphere rolls without slipping from rest down a plane at 4.00m long inclined at an angle of 42 degrees with respect to the horizontal as shown in the figure below. Determine the speed at the bottom of the incline.

*July 2, 2013 by jake*

**physics**

You need to siphon water from a clogged sink. The sink has an area of 0.36 and is filled to a height of 4.0 . Your siphon tube rises 45 above the bottom of the sink and then descends 85 to a pail as shown in the figure. The siphon tube has a diameter of 2.4 A)Assuming that the...

*May 21, 2009 by kelsi*

**physics**

A tennis player moves back and forth along the baseline while waiting for her opponent to serve, producing the position-versus-time graph shown in the figure. (The vertical axis is marked in increments of 1 m and the horizontal axis is marked in increments of 4 s.) (a) Without...

*October 3, 2012 by Anonymous*

**physics**

Oil Flows through a horizontal cylindrical pipeline with an average speed of 1.2 m/s. The pipeline has a radius of 0.5 metres. Calculate the volume of oil (in cubic metres) which flows through this pipeline in one hour.

*June 21, 2014 by muller*

**Science**

When people want to use water to create electricity they generally build a dam to hold the water back, creating a large lake behind the dam. Why is it necessary to hold the water back with a dam in order to produce electricity? A)It increases the amount of water available. B)...

*April 4, 2012 by Mia pleaseee helppp*

**physics**

A lighthouse that rises h1 = 47.0 ft above the surface of the water sits on a rocky cliff that extends d = 17.4 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of the lighthouse at an angle of theta = 29.3 degree above the ...

*January 25, 2014 by Sam*

**physics**

A large chandelier weighing 1500lbs. is suspended from the roof of a theater lobby. The steel pipe from which it hangs is 20ft long. Determine the size of the pipe necessary to carry chandelier safely. Use A36 steel. What is the resulting elongation of the pipe? I calculated ...

*April 17, 2010 by stacey graham*

**physics**

A large chandelier weighing 1500lbs. is suspended from the roof of a theater lobby. The steel pipe from which it hangs is 20ft long. Determine the size of the pipe necessary to carry chandelier safely. Use A36 steel. What is the resulting elongation of the pipe? I calculated ...

*April 17, 2010 by stacey graham*

**math**

a 10-foot ladder is placed against the side of a building as shown i figure i below.the bottom of the ladder is 8 feet from the base of the building .in the order to increase the reach of the ladder against the building ,it is moved 4 feet closer to the base the bulding shown ...

*May 14, 2013 by kirandeep*

**Physics**

a speed boat is moving though the water at a speed of 28 m/s when the engine stalls. the boat comes to a halt over 120m, what is the time it takes to stop and what is the acceleration. im trying to figure it out but i don't know what kinematic equation to use

*August 27, 2015 by Neil*

**Physics**

A pipe of constant diameter 13.4 cm carries water up a hill 30.34 m high. How much pressure is required at the bottom of the hill if the water is to reach the top?

*May 5, 2016 by Supansa*

**Calc**

The figure shows the graph of f(x)=xe^x, x greater than or equal to 0. figure: f(x) curve is drawn and under the max. point/ concave down curve there is an inscribed rectangle. with width from a(left) to b(right) and height up to a certain point of f(x). Let a > 0 and b >...

*February 14, 2016 by Betty*

**physics**

compare the relation of fundamental frequencies for a pipe closed at one end and for a pipe open at both ends

*March 19, 2013 by shashi ranjan*

**Chemistry Physics**

A steel pipe 8.25 m long is installed at 45°C. Find the decrease in length when coolants at -60°C pass through the pipe

*November 5, 2014 by Digby*

**Math**

A metallic pipe is 0.7 cm thick .Inner radius of the pipe is 3.5 cm and length is 5dm .Find it's total surface area?

*June 9, 2016 by Raghu*

**Math**

Farmer Mansfield wants to find whether the straight pipes are parallel. The distance from barn B to the north end of pipe 1 is 143 ft, and from there to the north end of pipe 2 is 42 ft. The distance from the barn to the south end of pipe 1 is 121 ft, and from there to the ...

*March 4, 2011 by Anonymous*

**Geometry**

Joel is laying pipe for a sprinkler system before he plants his lawn.The lawn is a rectangle 15 feet long and 8 ft wide. He needs to lay a piece if pipe that will run diagonal along the lawn. It will divide the area of the lawn into two right triangles. what will be the length...

*June 21, 2012 by Ashley*

**physics**

Radio waves of wavelength 163 m from a galaxy reach a radio telescope by two separate paths as shown in the figure below. One is a direct path to the receiver, which is situated on the edge of a tall cliff by the ocean, and the second is by reflection off the water. As the ...

*March 22, 2016 by Anonymous urgent*

**physics**

Radio waves of wavelength 163 m from a galaxy reach a radio telescope by two separate paths as shown in the figure below. One is a direct path to the receiver, which is situated on the edge of a tall cliff by the ocean, and the second is by reflection off the water. As the ...

*March 22, 2016 by Anonymous urgent*

**Geography**

This is my last question that I'm struggling with. We had to do 25 of them and this one I can't figure. Thank you for your help. It's greatly appreciated. Have a great weekend!!! More water flows through the Amazon Basin than through any other river system. Historically, ...

*September 10, 2010 by Hannah*

**geometry**

he small pipe has a radius of 18 feet and a height of 21 feet while the large pipe has a height of 28 feet. What is the volume of the large pipe in terms of π?

*January 4, 2013 by Anonymous*

**Physics**

An organ pipe open at both ends has a harmonic with a frequency of 480 Hz. The next higher harmonic in the pipe has a frequency of 540 Hz. Calculate the frequency of the fundamental and the length of the pipe. I know 540/480 is 9/8. I have no idea where to go from here.

*January 26, 2011 by Rachel*

**Math**

swimming pool Theflow rate for one pipe is 1 1/4 that of another pipe. A swimming pool can be filled in 5 hours using both pipes. Find the time to fill the pool only using the pipe with the lower flow rate.

*February 11, 2012 by Anonymous*