Sunday

February 7, 2016
Total # Posts: 439

**math**

there are 4 students sitting to receive their prizes. Alan and Julia wanted to sit together. how many different arrangements of students would there be
*December 9, 2012*

**math**

what is the square root of 6,multiplies the answer bt 2 and then squares that answer.please explain,thanks
*December 5, 2012*

**math**

a box contains more than 25 but less than 40 balls.when we counted by 3 there are 1 left over,when we counted by 5 there are 2 left over.how many balls are there in the box ? please explain how you work it out,thanks
*December 2, 2012*

**math**

find the number of fifths in one and four fifths
*December 2, 2012*

**math**

Iused 8 cubes to make a large cube.How many cubes will i need to make a 4^4^4 cube ?
*December 1, 2012*

**Chemistry**

An unknown solution may contain one of the ions of the pair below. Devise a test which allows you to distinguish between the ions. Cu2+(aq) and Co2+ (aq)
*November 29, 2012*

**math**

how many twelths in 3.1/2 ?
*November 28, 2012*

**math**

what is the next number in the sequence 2,3,7,16,32,______ .
*November 28, 2012*

**math**

4C =2A + 2B , 2B = A + 3C How many C's will balance the combination of A and B
*November 24, 2012*

**math**

the average mark of 10 tests is 76%.If the average mark of the first 7 tests was 73%,what is the average mark of the remaining 3 test
*November 24, 2012*

**math**

at rush hour,240 people pass through a turnstile at a railway station each 5 minutes.If there are 8 turnstiles, how many people would pass through them all in an hour
*November 24, 2012*

**math**

From hundreds chart;How to work out what % of the numbers are multiples of 3?
*November 22, 2012*

**math**

there are 3 different ways of travelling from A to B and 5 different ways of travelling from B to C. How many different ways are there of travelling from A to C through B ?
*November 22, 2012*

**math**

what number is 100 times less than 600
*November 17, 2012*

**math**

A 3 cm cube is painted on all its faces.It is then cut into 1 cm cubes. How many cubes will have paint on exactly 2 faces ?
*November 17, 2012*

**math**

there are 3 different ways of travelling from A to B and 5 different ways of travelling from B to C. How many different ways are there of travelling from A to C through B ?
*November 17, 2012*

**math**

we had to go 30km through the city and then 30km through the country.Through the city we averaged 40km/h and through the country we averaged 60km/h.What was our average speed for the entire journey ?
*November 17, 2012*

**math**

A bus stopped at Gulgong, 25% of the passengers got off the bus and 3 new passengers got on. At the next stop,3 quarter of the passengers got off the bus and 11 new passengers got on. The bus then had 17 passengers.How many passengers did the bus have just before it stopped at...
*November 17, 2012*

**math**

An open steel tank measures 2m by 2.5m by 3m.It holds 7500 ml of water. What is the volume of steel,in cubic metres,making up the sides of the tank ?
*November 17, 2012*

**math**

a tank is made in the shape of a rectangular prism, measuring 12 cm by 16 cm by 10 cm.It is full of water.A small rectangular prism measuring 2 cm by 3 cm by 4 cm is dropped into the full tank. What is the amout of water which overflows?
*November 17, 2012*

**math **

use the hundreds chart to answer this question; what percent of the numbers are multiples of 3 ?
*November 15, 2012*

**physics**

a jet plane traveling at +87 m/s lands on a runway and comes to ret in 11 s. a)Calculate its uniform acceleration b)Calculate the distance it travels
*November 6, 2012*

**physics **

top-fuel drag racers are able to uniformly accelerate at 12.9 m/s from rest 97 m/s before crossing the finish line . How much time elapses during the run ?
*November 6, 2012*

**Calculus**

lim (2Q^(2)+5)/(q+2) q->2 lim |y+3| y->-3
*October 27, 2012*

**Maths**

For y= 2x squared + x - 1 the x-intercepts and the turning point respectively are?
*October 21, 2012*

**physics**

The two angled ropes used to support the crate in Figure P5.7 can withstand a maximum tension of 1500 N before they break. What is the largest mass the ropes can support?
*October 8, 2012*

**Chemistry**

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.
*October 5, 2012*

**Chemistry**

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.
*October 5, 2012*

**chemistry**

how would you, explain ans how calcium chloride [CaCl2] is bonded.
*September 20, 2012*

**physics**

Initial velocity, (u), is given, so is acceleration, (g), so is the distance (s), 28.4m. Use v^2=u^2+2as and solve for v.
*September 19, 2012*

**earth science**

descibe the advanages of plotting data in graph form
*September 19, 2012*

**Physics**

Eric, I'm not sure what you need, but if it's Physics tuition (or Math)try Khan Academy. Hundreds of short vids. Hope Jiskha don't mind this post.
*September 18, 2012*

**5th grade math**

The moon is about 240.000 miles from earth. What is this distance written as a whole number multiplied by a power of ten
*September 13, 2012*

**Physics**

Force = Massx acceleration. Find the accel using v=u+at, solving for a. v is the final velocity (0); u is the initial (9.4), t is time (0.2) Then x by 110 kg. to get the force in Newtons.
*September 12, 2012*

**Geometry**

B is between A and C. Solve for x, if AB=2x+6, BC=4x-3, and AC=5x+12
*September 11, 2012*

**AP Physics**

V^2=u^2+2as. v= the final velocity; u=the initial velocity (9.2 m/s; a is accel and s is distance (more accutately, displacement). Solve for v.
*September 11, 2012*

**AP Physics**

The ball goes 120m in time t. t, or fall time, is sqrt of 2h/g, both given. 120/t gives the x component of velocity in m/s.
*September 11, 2012*

**Physics**

Picture a right angled triangle with one side AB being 25 x 125 metres long to the west; the other side BC being 19 x 66 metres long to the south. The displacement is the length of the hypotenuse AC; the direction being between 180 degrees and west. Sketch it out, then do the ...
*September 10, 2012*

**Physics**

Assuming the 'passing the window'part means 0.10s to go from the top to the bottom of the window... Then the veocity will be 1.18/0.1, so 11.8m/s. Accel will be that of 'g', so 9.8 m/s^2; and the initial velocity was 0 m/s. Use v^2=u^2+2as Solve for s, which ...
*September 10, 2012*

**physics**

Initial velocity is given, final velocity is given, and the time is given. Using these, rearrange v=u+at to solve for a. The ball is slower after the bounce, so what sign will the acceleration be?
*September 7, 2012*

**physics**

a) use v=u +at solve for a b) use v^2=u^2+2as solve for s. v is final vel; u is initial vel; t is time and a is accel. S is displacement; or distance in this case.
*September 7, 2012*

**PHYSICS**

Hor vel= 300cos55 Mult this by 42s to get the horizontal (x) distance. (42s btw is a bit ridiculous, but hey ho)
*September 6, 2012*

**Physics**

c=f*lambda, or the speed of light =the frequency x the wavelength. Solve for wavelength, and remember to divide by 4 for a quarter.
*August 22, 2012*

**algebra**

Multiply EVERY term in the second bracket by -x; then do the same with the -1. Gather all the like terms together: all the exponents, then all the x terms and then all the numbers.
*August 22, 2012*

**Math**

what is the value of 200 dimes? Subtract the answer from $28.10. How many quarters in your answer?
*August 22, 2012*

**physics**

The ball's horizontal and vertical components are independent of each other. The 11m per sec makes no difference to your calculation. You know the starting vertical vel( 0m per sec); the time,(4.8sec) and the acceletation (g). Use v=u+at to get the velocity at 4.8 sec, ...
*August 22, 2012*

**Physics**

Drwls Could it also be solved by using v=u+at for the upward throw;then another motion equation for the upward distance; added to the fall time (sqrt 2h/g) all the way to the bottom? Charlie
*August 22, 2012*

**Math**

I'm on the same problem and I'm having trouble solving it, can you go into a bit more detail.
*July 15, 2012*

**Physics**

Assuming air resistance is negligible.
*July 3, 2012*

**physics**

What do you know? Initial velocity 5 m/s Time 6s Displacement (distance, not quite the same)60m Look at the standard motion equations, see if you can find one that uses all of these to give acceleration. Then use v=u+at.
*July 3, 2012*

**physics**

Hint: what speed was the coin doing along the ground before you threw it?
*June 28, 2012*

**physics**

Weight is Mass (m) x acceleration due to gravity (g). W=mg So,to get back to mass, divde the weight by g. 84.5/9.81= ?kg Now adjust the value for g for when the elevator is going up or down (add or subtract the elevator velocity)and multiply it by the mass you calculated. When...
*June 9, 2012*

**math**

How can I calculate how long an amount of money will last if I spend x dollars per month, at the same time as the pot of money is attracting interest at y percent? Is thare a formula? Thanks
*June 7, 2012*

**Health**

Foundations Of A Healthy Lifestyle PF answers.
*May 5, 2012*

**Physics**

A merry-go-round with r = 4m and a perfect frictionless bearing is pushed with a force of 24 N by a young girl. She pushes with a constant force that is oriented tangentially to the edge of the merry-go-round. After she pushes the merry-go-round through 14 full rotations (at ...
*April 23, 2012*

**Physics**

A special pulley has two discs with radii R1 = .8 m and R2 = .35 m. A rope from the R2 disc connects the pulley to a wall and a rope from the R1 disc connects the pulley to a hanging mass. The axle is frictionless. The total mass of the pulley is 15 kg. a. If the hanging mass ...
*April 23, 2012*

**Physics**

A 3.0 m beam with mass 50.0 kg is attached to a wall with a hinge. A rope is connected to the middle of the beam and the wall forming a 60 degree angle with respect to the beam. A mass of 25.0 kg is set on the beam at an unknown distance. a. Draw a free body diagram of the ...
*April 23, 2012*

**Physics**

A 10 kg monkey wishes to climb a 7.15-meter high vine. The vine will break if the tension exceeds 110 N. The monkey starts from rest and exerts a constant force on the rope as he pulls himself upward. What is the shortest amount of time in which the monkey can climb the vine?
*April 23, 2012*

**Physics**

An actor in an action movie is supposed to jump up and catch a ring moving overhead which will carry him to safety. The ring is 8 m above the actor and moving at 12 m/s to the right. The actor jumps straight up and catches the ring at the peak of his jump. How far to the left ...
*April 23, 2012*

**Physics**

A 50-kg person starts from rest at the top of a large frictionless spherical surface (radius 6 m) and slides into the water below. What is the magnitude of the normal force she experiences halfway along the spherical surface (at theta = 45 degrees as shown)? At this point, she...
*April 23, 2012*

**Physics**

An aquarium filled with water has flat glass sides whose index of refraction is 1.48. A beam of light from outside the aquarium strikes the glass at a 43.5º angle to the perpendicular . The angle this light ray enters the glass is 27.7º, what is the angle of this ...
*April 15, 2012*

**Pysics**

An aquarium filled with water has flat glass sides whose index of refraction is 1.48. A beam of light from outside the aquarium strikes the glass at a 43.5º angle to the perpendicular . The angle this light ray enters the glass is 27.7º, what is the angle of this ...
*April 15, 2012*

**Physics**

An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?
*April 12, 2012*

**Chemistry**

Why B(CH3)3 cannot be Lewis Base??
*April 8, 2012*

**science**

Rank the species from strongest to weakest base: Cl-, OH-,NH2
*April 8, 2012*

**College Physics**

That idea of "omni directional" kind of confused me also... I would guess that it can be assumed as just a regular wave?
*April 4, 2012*

**College Physics**

A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude? b. What is the intensity of the wave at 5 km? c. What is the wavelength of the ...
*April 4, 2012*

**math**

The larger x values are to the right
*April 2, 2012*

**algebra 1**

Re type your question, I don't understand what you are trying to find.
*April 2, 2012*

**algebra**

Mult 1st eq by 3; x-2y+3z = 0 Mult 2nd eq by 4: 2x - 3y + 4z = 1 Add 2nd and 3rd: -4y+5z = 2 Mut 1st by 2: 2x-4y + 6z = 0 Add that answer and 3rd eq: -5y + 7z = 1 5(-4y + 5z = 2) + -4(-5y + 7z = 1) -20y + 25z = 10 + 20y - 28z = -4 -3z =6 z = -2 Sub into the 1st eq: x - 2y -6 =...
*April 2, 2012*

**algebra**

x=1, y = -3, z=-2
*April 2, 2012*

**math**

The larger x values are to the right
*April 2, 2012*

**Intermediate Algebra**

(1/8 )(16/81)(216/125) (2/81)(216/125) (2/3)(8/125) 16/375
*April 2, 2012*

**Physics**

Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated inside a region of uniform magnetic field of 0.395 T. The total resistance of the loop is 0.690 Ω. Calculate the force required to pull the loop ...
*March 31, 2012*

**physics**

A light spring having a force constant of 110 is used to pull a 15.0 sled on a horizontal frictionless ice rink. The sled has an acceleration of 1.60 ? [2/27/12 9:41:56 PM] Matt Yeager: By how much does the spring stretch if it pulls on the sled at 29.0 above the ...
*February 27, 2012*

**geometry**

true
*February 19, 2012*

**math**

If the height of a cylinder is made nine times longer, how many times the volume of the original figure is the volume of the new figure?
*February 16, 2012*

**algebra**

2012 with a power of 2012
*January 26, 2012*

**Chem II**

1605kJ
*January 18, 2012*

**Physics**

You pull on a rope that is attached to a box. The rope makes an angle of 25 degrees with the ground. You are pulling the box at a constant velocity. The force you are pulling with is 78N. The box weighs 25N. You pull the box a displacement of +16m. What is the work done by you...
*January 5, 2012*

**HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

At what level, or what kind of figure skating team? You can just google this; I did and some I found are: Team USA (Olympic team), Talbot Figure Skating Team (for Talbot county Maryland), The Diamond Blades, Dartmouth University Figure Skating Team, and the Achilles Edge ...
*January 5, 2012*

**Aviation**

Do you mean how hard you have to push the pedal? If so, it's hard to say. Cars may or may not have power brakes, airplanes may or may not have something similar. I'd think it also depends on how fast the plane is going, and crosswinds, etc.
*January 5, 2012*

**algebra**

can you place 44 coins in 10 containers evenly and not have the same amount of coins in each container
*December 1, 2011*

**statistics**

can you place 44 coins in 10 containers and have them distributed evenly
*November 18, 2011*

**social studies**

idk im asking u omg
*November 7, 2011*

**4th grade Math**

9Times1equals9
*November 3, 2011*

**trigonometry**

The side of a lake has a uniform angle of elevation of 15 degrees 30 feet. How far up the side of the lake does the water rise if the height of the lake increases by 7.3 feet during flood season.
*October 13, 2011*

**math**

write the expression for a number used as a factor seventeen times being multiplied by a number used as a factor fourteen times. then write the product as one power
*October 12, 2011*

**applied math**

An operating log indicates that the average flow through a pump for ten hours is 285 gallons per minute. The following week, the same output is measured as 340 gallons per minute. What is the percent change?
*September 26, 2011*

**Physics**

Thanks very much
*September 25, 2011*

**Physics**

Hi Would someone be able to confirm that the following equation wil give the fall time for an object falling under gravity ignoring air resistance: T= sq root of 2h/g where h is fall height and g is accel due to local value for gravity. A derivation from a more usual equation ...
*September 25, 2011*

**Geometry**

If PT=3x-4 and QS=4x-3 how do I solve
*September 16, 2011*

**fourth grade math**

round this number to the nearest thousand 409,614
*September 14, 2011*

**anoymous**

more it it thani
*September 9, 2011*

**Math**

What does KAPS mean in Math?
*August 18, 2011*

**statistics**

27. Consider the following hypothesis test. H0: µ = 15 Ha: µ ≠ 15 A sample of 10 gives a sample mean of 8.9 and population variance of 9. Consider the following data drawn from a normally distributed population: 4, 8, 12, 11, 14, 6, 12, 8, 9, 5, α = 0.01...
*August 8, 2011*

**Physics**

Help me find c.
*July 26, 2011*

**Physics**

The radius of the Earth is 6.38 x(10^6)m. How far (path length) does a point on the equator move if the Earth rotates... a. 20 degrees b. 20 radians c. 20 revolutions
*July 26, 2011*