# Math/Physics

207,579 results, page 81

### statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...

### math mental math

shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?

### PHYSICS- PROJECTILE MOTION

A physics book slides off a horizontal table top with a speed of 1.90 m/s. It strikes the floor after a time of 0.410 s. Ignore air resistance. a) Find the magnitude of the horizontal component of the book's velocity just before the book reaches the floor. b) Find the ...

### Physics repost

Posted by Mary on Saturday, October 6, 2007 at 5:13pm. Suppose you wish to make a solenoid whose self-inductance is 1.2 mH. The inductor is to have a cross-sectional area of 1.2 10-3 m2 and a length of 0.048 m. How many turns of wire are needed? For Further Reading Physics ...

why do kids have to read math and reading thare should be less homework less reading and less math

### statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...

### physics

a person jumps from a window 15m above a safety net. The survivor stretches the net 1.0 m before coming to rest. What was the average deceleration experienced by the person when they were slowed to rest by the net? I do know the answer is -150m/s2,but I don't know how the ...

### physics

You are part of a team to help design the atrium of a new building. Your boss, the manager of the project, wants to suspend a 16.0 kg sculpture high over the room by hanging it from the ceiling using thin, clear fishing line (string) so that it will be difficult to see how the...

### math

tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t = 20n ? "was", "is", "will be" translates into math as "="

### math

have a question in math (( distance between two points )) show that C(-5,-1)is the midpoint of the line segment joining A(-2,5) and B(-8,-7) please in detales .. thank u

### math

have a question in math (( distance between two points )) show that C(-5,-1)is the midpoint of the line segment joining A(-2,5) and B(-8,-7) please in detales .. thank u

### math

i am having trouble iwth the following math problem: lim x->oo -x/squre root 4+xsquare I am not sure if i multiple the denominator with the numerator?

### arithmetic

Well I am really bad at math mostly multiplication and division.When I start to think that i am getting math my teacher teachs something new what do i do.

### Math

I'm trying to decide what math course to take next year. How do Statistics and Trigonometry compare in difficulty? Which is more helpful for the SAT's? THank you for your explanations.

### math

I am already weak at math, but when they throw in letters it throws me off and confuses me more... can someone please show me how to work this problem? Ax+Hy=L,for x.

### math gr 9

hi can someone please post a website where I can do free grade 9 math exam practice.. i have already tried proprof but they are full...

### math

i just started this semester of math and i don't remember that if your adding mixed fractions are you supposed to chage it into an improper fraction to add it?

### math

Page 114 of pizzazz math has got me clueless. None of the problems make since and my homewrok is due tomorrow. Please help me!!!!

### Math

A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

### Math

Writing in math Braden and bialy each bought a kazoo for \$0.89.they each paid with a \$1.00 bill. Explain two different ways to show their change.

### Math 10-3

the work i got from my math teacher says Determine the surface area of each right rectangular prism to the nearest square unit. Any Help with that?....

### Math 112

Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?

### math

grandma trying to help my grandson in 5th grade math...question/"explain how knowing that 5 divided 8=0.625 helps you write the decimal for 4 5/8?

### math

Integrated Math 1. The Overland Trail: Traveling at a constant Rate. Who will make it? Need help graphing 3 sets of data on one graph?

### Math

Please help with math question below: Express the triple angle formula of tangent (i.e. tan〖(3x)〗) in terms of tanx.

### Math

Help plz I got a new Math problem that said this " Which letter has two obtuce angles? " ( My sis is " smartybrat" ) if you can answer it go by "Maddy .H."

### Math

Hello everyone! I'm a 10th grader and I scored a 3331 on my math scantron performance series test.... is this good, average or bad? Thanks! -a

### math

If it takes 1/4 an hour to type one page, how many pages can be typed in 3 1/2 hours? The answer is 14, right? But what is the written math equation to solve this?

### math

I just finished doing my math study guide for a test and there is one question that I don't know how to do. It is: f(x)=5-2x and g(x)=x^2=7x, find each value. a. g(3) b. f(2)+g(-1) c g(2x) I do not understand this at all, could someone explain this to me? Thank you.

### physics

How does the width of the central region of a single-slit diffraction pattern change as the wavelength of the light increases? Look at the formula on this.

### PHYSICS

IF JOE RIDES SOUTH ON HIS BIKE IN A STRAIGHT LINE FORE 15 MIN WITH AN AVERAGE SPEED OF 12.5KM/H, HOW FAR HAS HE RIDDEN?

### PHYSICS

SIMPSON DRIVES HIS CAR WITH AN AVERAGE VELOCITY OF 48.0KM/H TO THE EAST. HOW LONG WILL IT TAKE HIM TO DRIVE 144KM ON A STRAIGHT HIGHWAY?

### Physics

If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about ? When I use the quadratic formula, I get -8.97

### Physics- for Quidditch

I posted the question about the rain before and I understnad how to find componnets...but how would I do that without a given angle?

### Physics

A player kicks a football from ground level with a velocity of magnitude 31.0 m/s at an angle of 30.0 degrees above the horizontal. What is its maximum height?

### physics

A ball of mass .3 kg is dropped from a height of 10m. Its momentum when it strikes the ground is? I know p=mv how would I find velocity for this problem? Thanks in advance for your help.

### Physics

If a person jumped off the side of a ship from 20 feet high what speed would they be travelling at when they impact the water? Thanks Mike

### physics

please help If a 120 volt line to a socket is limited to 15 amperes by a fuse, will it operate a 1200 watt hair dryer? yes????

### Physics

How much force are you exerting on the earth right now? How can a rocket operate in outer space? Describe the process of walking.

### physics

what r the 4 forces on a plane whilst in flight?, im confused, i don't no whether it means like air resistance....or thrust.maybe u cud help me out :S

### Physics

Two negatively-charged bodies with -5.4e-5 C are 0.20 m from each other. What force acts on each particle? F=kqq/d^2 F=(9.0e9)(q)(q)/(.20^2) Would both q's equal -5.4e-5 C?

### physics

Two equal point charges of +3.00 * 10^ -6 C are placed 0.200 m apart. What are the magnitude and direction of the force each charge exerts on the other?

### Physics

How much work must be done to bring three electrons from a great distance apart to 1.0 * 10^(-10)m from one another (at the corners of an equilateral triangle)?

### physics

when preparing to undergo an MRI scan, why are patients advised to remove eyeglasses, watches, jewelry, and other metal objects?

### physics

You're explaining to a younggster at the seashore why the water is cyan colored.The youngster points to the whitecaps of overturning waves and ask why they are white. what is your answer?

### Physics

Three identical charges of 50 micro C are arranged at the points of an equilateral triangle 2 meters on a side. What is the net force on each charge?

### physics

Which of the following physical properties can be used to measure temperature using a thermometer? A)volume B)pressure C)density D)viscosity I got A

### physics

If a 264 Hz tone is emitted from a piano on a concert stage, how long will it be before a person in the balcony, 60 m away, hears the note?

### Physics

If you ask a friend to drive a small nail into a piece of wood placed on top of a pile of books on your head. Why doesn't this hurt you?

### Physics check

Atoms whose nuclei have the same number of protons but different numbers of neutrons are called.... isotopes?

### Physics

The first and second resonant lengths of an air column that is closed at one end are 15.5 cm and 45.5 cm, respectively. What is the best value for the wavelength?

### Physics

According to special relativity, at high speeds the distance between distant locations is: a) shortened b) no different than if you were at rest c) lengthened

### Physics

A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start

### physics

A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start

### physics

By what length is a light ray displaced after passing through a 4.7 cm thick sheet of material (n=1.38) with an incident angle of theta = 33.5°.

### physics

By what length is a light ray displaced after passing through a 4.7 cm thick sheet of material (n=1.38) with an incident angle of theta = 33.5°.

### Physics

Can scientists from other countries change what physicists in the United States think? Need help ASAP work due tomorrow XD

### Chem/Physics

Are there two ways of calculating the average kinetic energy of a molecule? Ik that 1/2mv^2 works but for this problem, i don't know the mass or the velocity....

### Chemistry/physics

Are there two ways of calculating the average kinetic energy of a molecule? Ik that 1/2mv^2 works but for this problem, i don't know the mass or the velocity....

### Physics HELP!!!

A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???

### physics...one last time

A mortar elevated to 60 degrees scores a hit 15 m up a building 30m away. with what speed was the shell fired?

### physics

a 200N sign is held by two wires that have 150 degree angle between them. find the tension in each wire.

### physics

How far to the nearest tenth of a meter can a runner running at 15 m/s run in the time it takes a rock to fall from rest 76 meters?

### Physics

a roller coaster moves 85m horizontally, then travels 45m at an angle of 30.0 above the horizontal. What is displacement from its starting point?

### Physics

a roller coaster moves 85m horizontally, then travels 45m at an angle of 30.0 above the horizontal. What is displacement from its starting point?

### Physics - Damon - continued

I don't know where you got sin theta = .1 from?? Look if I use m = 0 and the formula I used then I get L = 500m when I do arctan(25/500) I get 2.86 degrees.

### Physics

Touching a Van de graff generator and slowly moves away from the dome why he touches it again he recives a stron shock why ?

### Physics

What is the dimesnional formula of length, mass, volume, time, radius, force, frequency of evolution, velocity, gravity, tension

### Physics

1. What evidence did ancient Greek astronomers have that Earth does NOT move? The answer is because of the lack of parallax, but then there's a follow-up question... 2. How do we knoew it DOES?

### physics

10. How much current is required to produce a force of 0.96 N on a 75 cm long wire oriented at right angles to a 0.24 T magnetic field? A. 0.050 A B. 0.17 A C. 5.3 A D. 0.19 A 5.3 A (<--- (0.96)/((75.0e-2)*(0.24)) )

### Physics

What gravitational force do yhe two protons in the helium nucleus exert on each other? There separation is approximately 1.0 fm. I know that 1 fm is 10^-15 m i didn't know if that was how you figured it out to get it to N?

### physics

A piano wire has length L and mass M. If its fundamental frequency is f, its tension is: i got T=(lambda*f)^2m/L, but their answer is 4LMF^2 and i cant figure out how to get that

### Physics

A loop is rotated to the new orientation in 1s. What is the magnitude of the average induced EMF? B= 2T 60 degrees n again is sticking out of the page

### Physics

the teacher said something about doing the correct sig figs..im not sure if it applies to this, im so confused! 10.2* 7.5 =76.5? 27.1/5.31 =5.103578154425612?? 2.712 + 10.8= 13.512?

### physics

A car starts from rest and accelerates uniformly to a velocity of 8ft/s after traveling 250 ft. Find its acceleretaion. Help me with this pleeaase. Thank you.

### Physics

A baseball is thrown vertically upward with an initial velocity of 20m/s. The maximum height gained by the ball is? I do not understand this problem!

### physics

A particle is projected with a speed of 25 m/s at an angle of 40 degrees above the horizontal. "What is the time taken to reach the highest point of trajectory?"

### physics

A particle is projected with a speed of 25 m/s at an angle of 40 degrees above the horizontal. "What is the time taken to reach the highest point of trajectory?"

how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?

### physics

Tarzan swings on a 27.0 m long vine initially inclined at an angle of 35.0° with the vertical.(a) What is his speed at the bottom of the swing if he starts from rest?

### Physics

The highest that George can suck water up a very long straw is 2.0 m. (This is a typical value.) What is the lowest pressure that he can maintain in his mouth?

### Physics

The deepest point in the ocean is 11km below sea level, deeper than Mt. Everest is tall.What is the pressure in atmospheres at this depth?

### Physics

The deepest point in the ocean is 11km below sea level, deeper than Mt. Everest is tall.What is the pressure in atmospheres at this depth?

### physics

Is this true or a trick question? In order to get a piano to start moving, you must push against it with a larger force than it pushes on you?

### physics

An ox exerts a force of 7100N to the horizontal direction without slipping. If the ox has a weight of 8000N, what is the minimum coefficient of static friction?

### Physics

A football is kicked at 45 degrees and travels 82 meters before hitting the ground. A) What was its initial velocity? B) How long was it in the air? C) How high did it go?

### physics

Over a period of 9.0 seconds a plane changes its velocity from 29.5 m/s to 45.7 m/s. What is its uniform acceleration? ---------------- I'm reviewing for my final and i can not think of what the formula to solve this is.

### physics

A 1.25-kg book in space has a weight of 8.35 N. What is the value of the gravitational field at that location? GIVEN: m = 1.25 kg W = 8.35 N Therefore, they want the acceleration. Would I use this equation g = Fg/m?

### law of conservation of momentum.. physics

The boat would sink a little bit in the water and move in the direction that the melon was thrown to you.

### law of conservation of momentum.. physics

The boat would sink a little bit in the water and move in the direction that the melon was thrown to you.

### Physics

The work done in rubbing your hands together s equivalent to the amoun of heat produced. What principle does this demonstrate? I am not sure, is it kinetic energy?

### physics

How much work is required to completely separate two charges (each -1.9 microC ) and leave them at rest if they were initially 6.0mm apart?

### physics

How much work is required to completely separate two charges (each -1.9 microC ) and leave them at rest if they were initially 6.0mm apart?

### Physics II

A block begins to slide down a ramp after being elevated to an angle of 55 degrees. What is the coefficient of static friction?

### physics

is it possible to change both the pressure and the volume of an ideal gas without changing the average kinetic energy of the molecules?

### Physics

A soccer player kicks a rock with an initial velocity of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released? Vi = 0.50 m;s h = 4 m t = 0.70 s

### Physics

Compute the derivative of the given function and find the slope of the line that is tangent to its graph for the specified value f the independent variable. f(x) = 9x^2 – 2x + 8; x =3.

### physics

A 3 meter tall 40 degree inclined plane with a coefficient of friction of .3 with a box sliding from its top has this acceleration and final velocity.

### physics

two pint charges are 4 cm apart. They are moved to a new distance of 2 cm. By what factor does the resulting mutual forces between them change. a. 1/2 b. 2 c. 1/4 d. 4

### physics

What is the acceleration of the system if both blocks have a mass of 5.0 kg, and the coefficient of kinetic friction is 0.11? [___/4] (b) Determine the tension in the rope.