# Math/Physics

208,687 results, page 73

### physics

A car of mass 500kg and velocity=36km/h and suddenlybreak applied 150m calculate the force and work done?

### physics

How much heat is required to convert 3kg of ice at -5 degees C into steam at 125 degrees C?

### Physics (Waves)

Determine the intensity of light passing through a polarizer-analyzer combination with an angle of 45° between them.

### Physics

A rock is dropped from a height of 2 meters into a freshwater pond. How would I change the amplitude of this wave?

### Physics

Two pellets, each with a charge of 0.80 microcoulomb (8.0×10−7 C ), are located 2.8 cm (2.8×10−2 m ) apart. Part A Find the electric force between them.

### Maths, physics, chemistry,

The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

### Physics

An observer on Earth sees you travel 1000 m at half the speed of light. What distance do you think that you travelled?

### physics

if some of water in calorimeter splash out when tranfering the metal block, will it affect the experiment result?

### physics relativity

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass?

### Physics

In relativistic regimes, the total energy of an object with rest mass, m, speed, v, is: a); (Gama)mc^2 B);squre root of (m^2c^4 + p^2c^2)

### Physics

How much time is needed to produce 840 joules of work if 100 watts of power is used?

### Physics

This is about em spectrum? What are the effects of differences in the velocities of electromagnetic waves in different substances... long !@#\$%^& question

### physics

if the gravitational constant, increased to a billion times its actual value, what sorts of things would happen?

### physics

A bullet is fired in to s wall losses half of its velocity after penetrsting 3m.how much further will it penetrate.

### physics

Two point charges, Q1 = -2.3 μC and Q2 = +9.3 μC, are placed as shown in the figure. The y component of the electric field, at the origin O, is closest to

### physics

A man walked 5cm east and 10cm north calculate the distance covered and the magnitude of his displacement

### physics

Consider the motion of the tip of the minute hand of a clock. In one hour, the displacement and average velocity is .......

### Physics

What is the efficiency of a crane that used current of 8A at 150V to raise 450kg load at the rate of every minutes?

### Physics

An object weighs 100N on the earth's surface. Find its weight at a point P with orbital radius 2R. [g = 10NKg-1

### Physics

force 15i -16j N is added to another 23i N. In what direct measured from the positive x-axis does the resultant act?

### Physics

An object initially at restIs giving a constant acceleration of 0.5. Calculate the time it takes to travel 100m

### Physics

I want to become an astonomer or study astrophysics but I didnt do maths a level can I still do it? Is there any way you can help me or provide aN alternative

### Physics

A bal is batted straight up and returns to the level of the batter after 6.5s. Determine how high the ball went. A=-9.8m/s^2

A runner jogs 12km North then turns and runs 16km East three hours

### Physics

A car starts from rest and accelerates uniformly at 2m/s2 for 10 sec . Find the velocity and displacement at the end of 10 seconds .

### Physics

What is the power of engine that pulls a 1000 kg automobile at a steady speed of 10 m/sec along a level road?

### Physics

A 60-kg person begins to accelerate upwards on an elevator at a rate of 3 m/s^2. What does the scale read at this time? My answer: 768 N

### Physics 1

A 1400 kg car traveling at a speed of 34 m/s skids to a halt on wet concrete where μk = 0.50. How long are the skid marks?

### Physics

Note: I am in Algebra-based Physics Two 35.0 N weights are suspended at opposite ends of a rope that passes over a light, frictionless pulley. The pulley is attached to a chain that is fastened to the ceiling. Start solving this problem by making a free-body diagram of each ...

### Physics

During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s. How much power must be produced by the "active Na^+ pumping" system to produce this flow against a +30-mV potential difference? Assume that the axon is 40cm long and 30um in diameter...

### Physics

0.75 mol of argon gas is admitted to an evacuated 40 cm^{3} container at 40 C. The gas then undergoes an isochoric heating to a temperature of 500 C. Before I forgot to write the question...so the question is What is the final pressure of the gas? * physics - drwls, Friday, ...

### math help

i need to use mental math and the distributive property to simplify: can you pls check if this correct? a) 19(-6) i got: -114 or do i do like this: 10*(-6)=-60 9*(-6) =-54 -60 + -54= -114 b) 102* \$21 i got: \$2142 or do i do mental math like this: 100*21 = 2100 2 * 21 = 42 2100...

### Physics- Mastering Physics

Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. A The range increases with increase in angle and decreases with decrease in angle. B It increases with either an increase or decrease in angle. C It ...

### Math xc

I've tried and tried to answer this question..I just hate math and math hates me. So let's get to the point why you are all here 1:Find the unit price for each option below. Round to the nearest cent when necessary. Indicate which option is a better buy. Option 1: 10 candybars...

### Physics/Math

A certain string can withstand a maximum tension of 43 N without breaking. A child ties a 0.37 kg stone to one end and, holding the other end, whirls the stone in a vertical circle of radius 0.91 m, slowly increasing the speed until the string breaks. Where is the stone on its...

A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. Physics(Please respond) - Elena, Thursday, June 21, 2012 at 2:33am ÄU = Q - W Where ÄU is the change in ...

### physics

How would I find the acceleration of a car if it traveled 1.5 meters in one second? If it is accelerating at a constant rate with zero initial velocity, then use the formula X = (1/2) a t^2 and solve for the acceleration, a. X = 1.5 m, and t = 1 s. It could be not accelerating...

### Physics

The professor gave us no background material or explanations for any of these questions. 1. Imagine that molecules of H20 are stacked up in a cubic array, like a large number of cubical boxes. Each water molecule is taken to be at the center of each cube in this array. Let the...

### physics

Can someone please help me? I am having a really hard time with physics. This is not a test question. It is a practice problem from a review website I am supposed to use, but I am having a really hard time. Can someone at least help me to begin setting up the problem? I would ...

### Math

my daughter is working on a math problem called factor capture have any idea as to the rules for understanding it

### Math

My daughter has a math paper that asks to make a stem-and-leaf plot of data. I have no idea what this is!

### math

what would be the equation of a line that has a slope of -2 and passes through point (3,5)? Please help! Math test tomorrow:(

### math

Trying to help son w/math. Mom needs help please! translate the statement. (The product of a number increased by 10 and 4 is 22)

### Math

I need help with this math question: What percent of 400 is 12? Can you please write down the steps and the answer to this problem?

### math

unscramble these letter for a 5th grade math question dealing with fractions and decimals. the letters are IPDLISAF

5: 2 = 8 : 10 please explain to me how to do thissss :( im so lost and i have to one to turn to or any math books or anything.

### Reiny+Damon

Can you reply to my last math+log post =) thanks. I'm going to be having alot of math questions today.

### Math

I need some help with my math.. It says is each equation a direct variation? If it is find the constant of variaton. 32. f(x)=-3x 34. y=2x+5 I don't get how to do these.. please help me.

### math

I am doing 4th grade number sense are there any cool math tricks or short cuts that would be good for me to know.

### math

2nd grade math question Show how you would explain "Make a 10" to someone who never heard of it.

### math

What are some suggestions teachers can give to parents so that they might assist their children with unfamiliar math concepts?

### Math

Show all work solve the Math: Polynomial inequality and express the solution in set notation. 2t^2 - 3 < or = to t

### Math

How do you find the surface area of Prisms and cylinders? The stuff in my math workbook does not help me like at all! Please Help!

### math

in my math book i got a question that said order these number from least to greatest 0.09,3/25,8,0.1. My answer is 0.1,8,0.09,3/25 am i correct. Thanks.

### Math

I'm doing a project and I have looked everywhere for this answer. It's if using 50 math tiles how can you make the smallest area?

### Math

Math Question: winning time of a marathon is 1 hour, 24 minutes and 11 seconds... How do I find the average speed?

### To Reiny, math helper

can you look at my post, its just 4 math terms I need to figure out, please help

### Math

If I had the math problem: 2^4 x 3^9 ---- ---- 3^5 2^7 And I used the method of sorting the bases and subtracting the exponents. Would my answer be 2^-3 x 3^4?

### math

use integer values of x from -3 to graph the equation. (the x has a 2 above it,like to the second power) y=-2x+3 I don't know how to do this kind of math.

### math/algebra

I am having a hard time with math I cant get it. Write each rational number as a terminating decimal. 19/20, 1/8, & 17/5 can you please help!!

What is an expression that can be used to find 4 x 275 using mental math and properties of numbers?

### math

Describe a situation this week when you used math to solve a problem involving data, graphs and statistics.

### math

I'm very confuse my teacher talk bout her life in never teach us students the math lesson. y=3/2x-1 y=-x+4

### Math

Can you drop your email for my math question?Its on Google classroom and it has a picture that does not copy onto jiskha's homework help

### math

create a tree diagram to show all possible arrangements of the word "MATH" how many outcomes exist?

### English

1. Boys are better at math than girls. 2. He is the best at math of all the students in his class. (Are both grammatical?)

### Math

Find the mode of the set of data 59,61,54,51,38 46,56,52,63,40,44 1.B 2.D 3.C 4.A 5.D 6.C 7.B 8.C 9.C 10.C 11.B 12.D 13.B 14.A 15.A 16.A 17.D 18.A 19.C 20.D Math lesson:10 Unit:2 Practice test 100% answers

### improve sentence

It was Wednesday morning, November 15, 2006 and I woke up early than usual not being able to sleep because I had a AP Physics test that day. is there another way to put this in a sentence with all the information i want. it seems too long and too clumped together. You have ...

had this question last night for Dr. Bob-A fox sees a piece of carrion thrown from a nest 14 m high and goes to get it. Carrion is thrown 1.5 horizontal velocity. Fox is 7. m from base of tree. What is mgnitude of fox's average velocity if it grabscarrion just as it touches ...

### Math/Physics

Thanks in advance, these problems have been stumping me. Please include answers though, I have tried to work it out, but need answers to see where I am going wrong/where I need to go. 1. Determine all solutions for X^4+2-3i 2. Forces of 60 and 100 pounds have a resultant force...

### life science , geography , history and math literecy

I am a grade 11 student and want to follow careers linked to geograpy . My problem is that most of the careers I am in interested in want pure math and im doing math literecy . My question is that , Is it possible for me to start mathematics in University so that I can follow ...

Bacterial populations can grow to enormous numbers in a matter of a few hours with the right conditions. If a bacterial colony doubles size every 15 minutes, how many bacteria will be present after 1 hour if the colony began with 4 bacteria?

### physical science

How much heat is required to raise the temperature of a 10.0 kg of aluminum by 80 degrees Celsius? Look up the specific heat of aluminum. The units will be Calories/kg*degC or Joules/kg*degC. Multiply that number by the temperature change (80 C) and the mass (10.0 kg). See ...

### Math

what kind of math journals, essays, & projects you guys do in 7th grade math??? i'm really curious i saw the grading policy 2 my skool website here is the grading policy for math DISTRICT GRADING POLICY MATHEMATICS -70% FORMAL ASSESSMENTS (Tests, Quizzes) -15% ALTERNATIVE ...

### Physics

On a mass of 100 kg, a force of 120 N acts right and at an angle of 30 degrees to the horizontal. If the coefficient of sliding friction is .1 what is the acceleration of the mass? 100N* cos30 -(100sin30+mg)(.1)= m*acceleration does "m*acceleration mean the acceleration of the...

### physics

light travels from ethanol intro crown glass. what's the brewster angle in this situation? illustrate your answer with a light ray diagram. what's the signifcance of this angle of incidence? n1=1.36for ethanol nR=1.52 for crown glass tanangleB=nR/ni =1.52/1.36 =1.12 (48.2 ...

### math

Im good and all at math but I have a question this isn't tricky its like a math brain buster!Suppose you round each group of numbers to the nearest ten.which group of numbers all roundto the same number? A.423,418,426 B.376,378,384 C.255,253,251 D.688,692,696

### algebra

From 2009 to 2014 the percent of students placing into Math 101 has increased from 13% to 25%. Meanwhile, the percent of students placing into Math 222 has dropped from 25% to 7% If both placements change at a linear rate, what will the percentage be when the percent of people...

### Physics

Ammeter 1 reads 0.20 A. a. What should ammeter 3 indicate? b. What should ammeter 4 indicate? Given: RA = 22-OHM RB = 13-OHM A1 = 0.20 A Ammeter 2 reads 0.15A. a. Find the voltage across the 22-ohm resistor? b. Find the voltage across the 15-ohm resistor? c. What is the ...

### University studies

According to the Center for Mathematics Excellence, which of the following is a math myth? A. Knowing the rules and how to use them is the most important part of math. B. Even people who are highly skilled in mathematics and science find these subjects to be challenging C. ...

### English-Urgent

I have to find the subjects and verbs in all these sentences, please let me know if I did it correctly. Thank you. A guy whom I work with has a theory about college students. (Verb=work, has) (Subject=guy, theory) He believes that students' majors reflect their personalities...

### math

Consider two types of nonlinear equations. What unique quality does each possess and how does that quality cause the graph's unique shape? Name two unique examples of these shapes in real-world situations would someone please let me know what they get for the answer and i ask ...

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...

### physics

A firefighter at street-level, 55.0 m away from a burning building, directs a stream of water from a fire hose at an angle of 35.0° above the horizontal. If the speed of the stream is 50.0 m/s, at what height will the stream of water strike the building? I started by finding ...

Does any one know a really good websites for 6th grade math ? I'm behind in math and need to catch up or else I'll be really super dum . I need HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

### Math

Johnny spent 4 2/3 for his exams studying for his math exams. He spent 3/4 of the time studying for math. How many hours did Johnny spend stydying for his exam? How do I show the number sentence?

### math

1 1/2 * 3 1/5 = 1 1/2 = 3/2 3 1/5 = 16/5 Multiply numerator and denominator to arrive at the answer. Be sure and reduce the fraction if possible. Please help Angelina!!!!!!!!!! With Math.

### math

I'm doing my math, but i don't understand these 3 things mean: lowest common denominator simplest form of a fraction reciprocal help plz and thank u!

### math

I am trying to understand how to translate math questions into an inequality. Here is an example: The cost is at most \$4857.95

### math

A student's scores on four math tests were 89,92,95, and 85. What will he need to make on the 5th test to have an average of 93? is this possible? HELP!

### Math

I'm TOTALLY stuck on my math!!! How do I find the unit rate of \$11.49 for 3 packages?? I have to round to the nearest hundredth if necessary.... :)

### Math

Need help with the below math please tell how you could use a number line to determine which of two numbers is greater.

### math

whats th eanswer to the math page. why do elephants have ivory tusks? and the answer to what can you use to tie up a spaceship?

### math

Dear Ms.Sue is the answer to 5lb.-13oz. 67oz. By the way your helping my future,I want to be a math and science teacher.

### Math

Hi I am not good with math. Please tell me how to differentiate mixed numbers, order of operation,subtraction, divide and multiplication etc. Thanks!

### Math

Mike scored 85, 88, 87, 93, 95, 92, and 83 on his math tests. What is the least he can score on the next test if he wants to maintain a 90 average? PLZ HELP ME!!!!!!!! I'm so confused

### Math

Can someone please explain to me exactly what type of math this is (e.g. radicals, linear equations) and how I would go about solving this?

### math

can someone help me with this math question?Solve the system of equations given below. x+3z=12 -x-2y+z=10 3x+5y+2z=-7 I am really stumped. Please help! Thanks in advance!

### math

for grade 3 math-- Explain what happens to the square if you double the length of its sides.Draw 2 squares to support your answer