Friday

December 9, 2016
Number of results: 39,839

**Physics**

Mutiple choice: A car travelling at 10 m/s accelerates at 3 m/s^2. Its new velocity is A.) 12 m/s B.) 22m/s C.) 17 m/s D.) Can not be determined. Which of the following is not acceleration? A.) rate of change of speed in a particular direction B.) rate of change of motion in a...

*December 17, 2013 by Katie*

**engineering**

The flow system as shown in the Figure, the centrifugal pump(3500 R.P.M.) is delivering water at 100 gal/min and 70 °F into a boiler operating at a pressure of 35 psig. The water levels in the feed tank and boiler are constant. Because corrosion is expected to be negligible, ...

*December 18, 2013 by sun.life*

**Physics**

In exercise physiology studies, it is sometimes important to determine the location of a person's center of gravity. This can be done with the arrangement shown in the figure below. A light plank rests on two scales that read Fg1 = 440 N and Fg2 = 320 N. The scales are ...

*February 1, 2015 by Angela*

**Physics (Difficult)**

A uniform rectangular bar with cross-section 66 mm x 54 mm and of length 1.7 m has mass 16kg. It pivots about an axis prependicular to the wider face. The axis is equidistant from the edges and 170 mm from one end. What is the relevant second moment of mass?

*October 19, 2012 by Alex*

**Physics**

The moment of inertia of an asteroid rotating about its own axis is 5.00 ! 10 4 kg"m2. Its angular velocity is 40.0 rad/s. If a force acts on the asteroid for 0.100 s, increasing the angular velocity to 48.0 rad/s, find its magnitude

*December 9, 2011 by HELP*

**10th grade math**

How would you figure out 1.45386759 x 10 to the 12 and round to the significant figure? thanks

*August 19, 2008 by Rebekah*

**Solar Energy Please Help**

Figure 1 shows a simplication of the AM1.5 solar spectrum at 1000W/m2. The spectrum is divided in three spectral ranges: A for 0nm<λ<620nm B for 620nm<λ<1240nm C for 1240nm<λ<1860nm The photon flux in each spectral range is also shown in the ...

*October 26, 2013 by Anonymous*

**physics**

A stunt car driver drives off an h = 7.9 m-high cliff into a lake with a horizontal speed of 17 m/s. The car needs to clear an 17.1 m-long ledge that is 5.0 m below the edge of the cliff, as shown in the figure below. The car just misses the ledge on the way down. With what ...

*October 8, 2016 by dolapo*

**Physics Flux**

The electric flux through the surface shown in Figure Ex27.10 is 15.0 Nm2/C, and the electric field makes an angle á = 70° with the surface. What is the electric field strength? The surface is a 10cm by 10cm square.

*September 13, 2010 by David*

**physics**

A gymnast weighing 72 kg hangs from a cross bar. His coach pushes him forward with a force of 38 N and backward with a force of 20 N. The upward reaction force on the gymnast is 750N. Calculate: i). The resultant (net) force on the gymnast and ii). The angle of the resultant ...

*November 9, 2011 by brighton*

**Physics**

A particle rotates in a circle with centripetal acceleration a = 8.8 m/s2 . What is a if the radius is doubled without changing the particle's speed? What is a if the speed is doubled without changing the circle's radius?

*October 12, 2015 by Shiv*

**Physics**

The intensity of sunlight reaching the earth is 1360 W/m^2 Part A: Assuming all the sunlight is absorbed, what is the radiation-pressure force on the earth? Give your answer in newtons. Part B: Give your answer as a percentage of the sun's gravitational force on the earth. I ...

*April 24, 2008 by Jill*

**Physics**

A mobile consists of two very lightweight rods of length l = 0.400 m connected to each other and the ceiling by vertical strings. (Neglect the masses of the rods and strings.) Three objects are suspended by strings from the rods. The masses of objects 1 and 3 are m1 = 5.90 kg ...

*June 22, 2012 by Luca*

**AP Physic**

Hi there I am having so much problems trying to solve this physic problem and I really need help. Please give me a big hint on how to find the amplitude of this problem because i tried using everything i know and i cannot figure it out. This homework problem deals with wave ...

*January 17, 2010 by shylo*

**physics**

If an object is initially moving with a constant velocity of 20m/s towards positive x-axis and after 5 sec it changes its direction and moving at an angle of 30o with x-axis, find magnitude and direction of its acceleration.

*October 26, 2014 by Anonymous*

**Physics**

Trace by drawing the path of a ray of light shown in 90 degrees. This ray is incident in a perpendicular direction on the figure through a glass triangular prism on one side of the right angle. Given that the two sides of the right angle are equals and that the critical angle ...

*November 2, 2012 by Anab*

**Physics**

As part of a daring rescue attempt, the Millennium Eagle coasts between a pair of twin asteroids, as shown in the figure below where d1 = 2.55 km and d2 = 1.28 km. The mass of the spaceship is 2.53 x10^7 kg and the mass of each asteroid is 3.70x10^11 kg. Find the speed of the ...

*October 21, 2016 by A*

**Physics**

A 570.0 g ball moves in a vertical circle on a 103.0 cm-long string. If the speed at the top is 4.30 m/s, then the speed at the bottom will be 10.65 m/s. (you'll learn how to show this Chapter 10.) What is the gravitational force (in N) acting on the ball? What is the tension ...

*October 17, 2011 by :(*

**physics**

A force 457 Newtons causes a displacement 6.2 metres which is at an angle of 8 degrees to the direction of the force vector. Calculate the work done by the force.

*May 26, 2014 by jake*

**Making a vertical graph**

I had to measure students in my class. I measured their hieghts in inchs but converted the numbers to centimeters and meters. Now i have to construct a vertical bar graph showing height on the X axis and number of people on the Y axis. I have a blank gridded bar graph, but i ...

*June 20, 2010 by amy*

**vertical bar graoh**

I had to measure students in my class. I measured their hieghts in inchs but converted the numbers to centimeters and meters. Now i have to construct a vertical bar graph showing height on the X axis and number of people on the Y axis. I have a blank gridded bar graph, but i ...

*June 20, 2010 by amy*

**physics**

Two positive charges, each of magnitude q, are on the y-axis at points y = + a and y = -a. Where would a third positive charge of the same magnitude be located for the net force on the third charge to be zero? a) at the origin b) at y = 2a c) at y = -2a d) at y = -a I said A ...

*October 10, 2011 by aichan*

**Physics**

A 3.0g bead has been threaded onto a vertical, frictionless, circular hoop with a 20cm radius. The bead is released from rest at 25º below the vertical. (a) Find the speed of the bead when it is 70° below the vertical. (b) Using the free-body diagram technique, find the ...

*July 30, 2014 by Randall*

**physics**

An air puck of mass 0.33 kg is tied to a string and allowed to revolve in a circle of radius 1.12 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 1.1 kg is tied to it. The suspended mass remains ...

*December 10, 2011 by tanya*

**physics**

Consider three charges q1 = 6.0 µC, q2 = 1.8 µC, and q3 = -2.8 µC, arranged as shown below. Q1 is positive and is 3 cm away from Q2. Q2 is also positive and is 2 cm away from Q3 which is negative. (a) What is the electric field at a point 1.0 cm to the left of the middle ...

*April 23, 2013 by wendlen*

**PHYSICS**

A 41kg box is being pushed a distance of 7.0m across the floor by a force P whose magnitude is 158N. The force P is parallel to the displacement of the box. The coefficient of Kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on ...

*February 24, 2007 by Cavin*

**physics**

A disk with mass m = 5.2 kg and radius R = 0.44 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.59 m from the rope and at a frequency f = 18.6 rev/s (with a direction shown by the arrow). 1. What is the magnitude of the angular ...

*November 24, 2014 by stewart*

**Math Help**

Which of the images above represents a proof of the Pthagorean Theorem? Explain your choice, and them explain how the figure proves the Phythagoream Theorem. Figure A The hypotenuse of the right triangle is 64 units^2 One leg is 36 units^2 The bottom leg is 9 units^2 Figure B ...

*November 5, 2014 by Callie*

**physics**

A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900kgm^2. A child pushes the merry-go-round with a constant force of 80 N applied at the edges and parallel to the edge. A frictional torque of 12 Nm acts at the axle of the merry-go-round. a. what ...

*October 17, 2010 by Alyssa*

**Physics**

A 74.1 kg climber is using a rope to cross between two peaks of a mountain as shown in the figure below. He pauses to rest near the right peak. Assume that the right side rope and the left side rope make angles of 48.0° and 11.16° with respect to the horizontal respectively...

*October 15, 2012 by LS*

**Calc**

A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the tank if the tank is half full, assuming that the diameter is 6 feet and the slime weighs 54 pounds per cubic feet?

*December 14, 2013 by Ethan*

**Trigonometry**

Google this: 5.1 using fundamental identities Comcast Click and open the first result that appears on your search (Result= PDF Document). Textbook pages will appear and go to page 383 on problem #129. The directions will mention "Solve the right triangle shown in the figure." ...

*February 10, 2013 by AwesomeGuy*

**physics**

Two point charges, 4.0 µC and -2.0 µC, are placed 5.4 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and the 4.0 µC charge is at x = 5.4 cm. (a) At what point(s) along the x axis is the electric field zero? (If there is no point where E = 0 in a region, ...

*February 5, 2012 by anybody*

**physics**

Two point charges, 4.0 µC and -2.0 µC, are placed 4.4 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and the 4.0 µC charge is at x = 4.4 cm. (a) At what point(s) along the x axis is the electric field zero? (If there is no point where E = 0 in a region, ...

*February 9, 2012 by Conor*

**geology**

... Refer to Figure 9.21 on p. 264 of the text. How would you determine the slope of the land surface in this figure?

*December 27, 2010 by kim*

**world history**

i need to figure out who a contemporary figure i could compare to Benjamin Disraeli. who does he alike?

*May 23, 2011 by Oceana*

**English**

Would guys be able to help figure me figure out a citation that am having a hard time with?

*April 3, 2015 by m*

**calculus 1 (I need help)**

The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show all steps. (Hint: use ...

*May 6, 2015 by linda*

**Help plz on Calc **

The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show all steps. (Hint: use ...

*May 6, 2015 by Linda*

**Geometry**

Calculate the area of the shaded region in the figure shown. the image is on: tiny pic . com/r/152zyxi/8] just remove the spaces a) 144-54 SQRT(3) square meters b) 144 - 18SQRT(3) square meters c) 144 - 6SQRT(3) square meters d 54 SQRT(3) square meters

*June 23, 2014 by Geo*

**5th grade**

How do you figure out area of compound figure

*March 3, 2010 by Sydney*

**algabra 1**

The following figure has a length of 5 and a width of 9. What is the area of the figure?

*October 25, 2010 by devonte*

**Math**

What is another way to figure out the area of a complex figure?

*February 8, 2013 by Ryan *

**Geometry**

What is another way to figure out the area of a complex figure?

*February 9, 2013 by Ryan*

**math**

Find the constant of Variation K m varies directly with n;m=144 when m=8

*September 30, 2007 by sissi*

**Physics**

Describe how the range of a projectile varies with launch angle.

*June 3, 2008 by Laura*

**math.**

Which of the following is an equation of joint variation? y = kxz x varies with y y = k/x y = kx

*June 12, 2008 by margie =]*

**Algebra II**

Suppose that y varies directly as the 3/2 power of x, and that y=192 when x= 16. find y when x=9.

*July 3, 2011 by Reanna*

**College Algebra 2**

Find the equation of variation in which y varies jointly as x and z and y=8, x=4 and z=2

*September 25, 2011 by So Confused*

**algebra**

Find the varition constant and an equation where y varies directly as x=16 where x=8

*November 8, 2011 by Robert*

**Algebra (direct variation)**

the value of y varies directly with x, and y=-2 when x=-4 Find y when x=8 -2=k(-4)

*November 28, 2011 by Hannah*

**Math**

if g(x) varies exponentially with x, and g(0) =37 and g(7) =5940 find the particular equation...

*February 19, 2012 by Billy*

**math**

Solve variation problem if m varies jointly as z and p, and m=10 when z=2 and p=7.5, find m when z=5 and p=7

*February 24, 2012 by Anne*

**Algebra 2**

A measurement y varies directly with regard to another value x. If y = 9 and x = 24, find x for y = 25.

*March 28, 2012 by Marie*

**math**

Suppose T varies directly as the 3/2 power of x. When x=16, T=160. Find T when x=4

*April 11, 2012 by Anonymous*

**Alg 2 (HS)**

If Y varies inversely as 3X^2, determine what Y would be if X = 4 and another point on the equation is (2, 48).

*September 22, 2012 by Gregory B.*

**intermediate algebra**

Y varies directly with square root of X. Y=3 when X=4. find Y when X=1

*October 1, 2012 by suzy*

**math**

p varies directly as the square of m inversely as n. if p =200 when m=5 and n=1/2 find p when m=6 and n=2

*November 4, 2012 by debra*

**SS**

The layer in the ocean where the temperature varies with depth is called the ____.

*February 7, 2013 by Bell*

**math**

Y varies direct proportion with x.if x=5 then y=12,thus find the value of y when x=7.5

*February 17, 2013 by Maths.department*

**HELP!!! Math**

If a varies jointly as b and the square root of c, and a = 21 when b = 5 and c = 36, find a when b = 9 and c = 225.

*June 5, 2013 by Jnr John*

**Math-Algebra**

If a varies inversely as b, and b is increased by 50%, what is the percentage of change in a?

*November 27, 2013 by McKenna Louise*

**algebra**

suppose that S varies directly as the 2/5 power of T, and that S=8 when T=32. Find S when T=243.

*January 26, 2014 by Anonymous*

**algebra**

If f(x) varies directly with x, and f(x) =45 when x=9, find the value of f(x) when x=3 answer choices are: A.5 B.9 C.15 D.27

*February 19, 2014 by Ayriana*

**Algebra 2- Variation**

If w varies directly as r and inversely as the square of p, if w= 25 when r=5 and p=4, find r when w=16 and p=8

*March 5, 2014 by Amy*

**Algebra 2- Variation**

If y varies jointly as x squared and the radical of z, and y = 49 when x =2 and z=25, determine y when x=-1 and z =16

*March 5, 2014 by Amy*

**Algebra**

Suppose that y varies inversely with x, and y = 0.2 when x = 2. What is an equation for the inverse variation? y = 1.8x y = 0.4/x x = y/1.8 y = x/0.4

*April 23, 2014 by Sandra*

**Coordinate Algebra**

Suppose y varies directly with x. If y = 6 when x = −2, find x when y is 9.

*September 16, 2014 by Anonymous*

**math**

P varies directly as the square root of q. P=8 when q =25 find p when q = 100

*October 26, 2014 by Anonymous*

**math**

the cost C varies directly as the number in of penals is written as?

*October 28, 2014 by rosemariel*

**math**

If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant? A. 1⁄3 C. 72 B. 2 D. 144

*April 2, 2015 by Anonymous*

**math**

Y varies partly as X and as X^2 when X=2 Y=14 and when X=5 Y=65.Express Y interm of X hence find Y when X=-2

*August 18, 2015 by charity*

**Algebra**

In a table, how do you tell if y varies directly with x and write an equation if it does?

*November 16, 2015 by Anonymous*

**Math**

If P varies jointly with Q and R, and P=420 when Q is 3 and R is 7, what is the value of P when Q is 2 and R is 1? Help me please...thx

*January 7, 2016 by Ck*

**Maths**

X varies directly as the product of u and v and inversely as their sum. If x=3 when u=3 and v =1, what is the value of x if u=3 and v=3

*February 18, 2016 by Ifeoluwa*

**maths**

how does the kinetic energy of an object varies on increasing its velocity by 10% ?

*March 7, 2016 by manisha*

**Math**

M varies directly as n and inversly as the squere of p. If m=3 when n=2 and p=1.find m in terms of n and p.

*April 24, 2016 by Wisdom*

**Algebra**

Find an equation of variation in which y varies jointly as x and z, and y=4 when x=4 and z=1. Simplify

*May 9, 2016 by Timmy*

**math**

W varies directly to the squard of a and inversely as the square root of d

*July 3, 2016 by Elscy*

**Pre algebra **

Find the constant of variation when y varies inversely as x, and y=8 when x=5

*September 5, 2016 by Tisa*

**Pre algebra **

Find the constant of variation if y varies directly as x, and y=17 when x=34

*September 5, 2016 by Tisa*

**Maths **

If (x+3) varies directly as you and x= 3 when y= 12 Find the ; i)relationship between x and y ii) value of x when you = 8

*September 17, 2016 by Anonymous*

**algebra**

f(x) varies inversely with x and f(x) = –10 when x = 5. What is the inverse variation equation? is the answer f(x)= -2/x ?

*October 21, 2016 by megann*

**Pre-Algebra**

If y varies directly with x and y = 3 when x = 12, then what is the value of y when x = 40? 4 160 10 480

*November 7, 2016 by Britney*

**Physics**

A conducting solid sphere (R = 0.24 m, q = 7.6x10^-6 C) is shown in the figure. Using Gauss's Law and two different Gaussian surfaces, determine the electric field (magnitude and direction) at point A, which is 0.000001 m outside the conducting sphere. (Hint: One Gaussian ...

*October 2, 2015 by Geneva*

**college algebra**

find the zero's for the following polynomial and give the multiplicity for each zero. For each zero, state whether the graph crosses the x-axis or touches the x-axis and turns around. f(x)=5(x-2)(x+4)^3 I am having trouble with this. Can you please show me how you got the ...

*November 11, 2012 by ladybug*

**science**

Consider a rotating platform such as you used in lab. Imagine that it is initially rotating at some angular velocity. You drop a disk, that is not rotating, onto the top of the rotating platform so that it sticks to the rotating platform and begins rotating along with the ...

*August 1, 2014 by sara*

**Physics**

A 25 kg chain initially at rest on a horizontal floor requires a 365 N horizontal force to set it in motion. Once the chair is in motion, a 327 N horizontal force keeps it moving at a constant velocity. a. Find the coefficient of static friction between the chain and floor. b...

*October 17, 2010 by Daniel*

**Physics**

Two current carrying wires cross at right angles as indicated in the figure. If the wires are not restrained, what statement best describes the motion of the wires? Hint: To help you visualize the situation, draw first the magnetic field that Wire 1 makes at the points shown ...

*March 15, 2010 by mm.*

**Physics**

Four charges are located at the corners of a square as shown below. Calculate the magnitude and direction of the net force on charge -3Q and charge 4Q. (sorry don't have picture, but it is of a square with corners -Q, 2Q, -3Q, and 4Q clockwise). I don't understand how to start...

*May 13, 2010 by Sheila*

**physics**

A painter of mass 90.0 kg stands on a platform of mass 50.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 600.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be ...

*September 28, 2012 by shyne*

**Physics **

A painter of mass 80.0 kg stands on a platform of mass 75.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 400.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be ...

*September 21, 2016 by Ashley*

**physic**

Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 439 N and F2 = 365 N. (Assume up and to the right as positive directions.) (a) What is the resultant of these two forces? magnitude___ N direction ____° to the right of the ...

*October 15, 2009 by Chan*

**Physics**

A beaker of mass 5kg containing oil of mass 17.4 kg and density 8.5 x102kg/m3 rests on the scale A block of iron of mass 6.7kg is suspended from the spring scale and completely submerged in the oil as shown in Figure below. Determine the equilibrium readings of lower scale in ...

*November 3, 2014 by G*

**physics**

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 12.6 m/s. The cliff is 49.1 m above a flat horizontal beach as shown in the figure. a.How long after being released does the stone strike the beach below the cliff? b.With ...

*January 24, 2016 by Help plz*

**physics 2014**

An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 23.0° south of west. The second aircraft is at altitude 1300 m, horizontal distance 17.8 km, and 18.0° south of west. What is the distance ...

*January 15, 2012 by James*

**physics**

Two particles are in a uniform electric field whose value is +4000 N/C. The mass and charge of particle 1 are m1 = 1.0x10-5 kg and q1 = -15 µC, while the corresponding values for particle 2 are m2 = 3.0 x10-5 kg and q2 = +35.0 µC. Initially the particles are at rest. The ...

*October 4, 2010 by Nate*

**Science--Physics--check answers**

1. A football player pushes a dummy forwards at a constant 0.85m/s for 11m using 7150 J of energy. The dummy has a mass of 120 kg. Find the force the football player exerts, find the frictional force the dummy exerts. - for my answer I got 1176N as the force the football ...

*February 3, 2014 by Diane*

**Physics**

A diving board length 5.60m that weighs 250N is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance 1.55m away . Find the magnitude of the force exerted by the left pillar when a 90.0kg diver stands at the far end ...

*December 1, 2010 by ree*

**Physics**

An electron of mass me and charge q=-e is injected horizontally midway between two very large oppositely charged plates. The upper plate has a uniform positive charge per unit area +σ and the lower plate has a uniform negative charge per unit area -σ . You may ignore...

*March 5, 2013 by P*