Math/Physics

206,302 results, page 72

Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.

Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.

physics

A red racecar accelrates at a constant rate of 5 m/s2. How much time does it take to increase its speed from 50 m/s to 60 m/s? a. 17 s b. 0.058 s c. 0.25 s 2.0 s

Physics

Two parallel forces of magnitude 4 and 6 newton are acting on a body placed at 4m apart. Resultant force will be

physics

An object experiences an impulse, moves and attains a momentum of 100 kg·m/sec. If its mass is 50 kg, what would its velocity be?

physics

A body moves with uniform acceleration with a distance x for 1st sec. What is relation b/w x & y? A) y=24x B) y=16x C) y=12x D) y=8x

physics

a car travelling at 60km/h uniformly retards for 10s and reaches a velocity of 45km/h. find the retardation.

PHYSICS

A mass of 2kg is dropped from a height of 3m.Neglecting air resistance,KE of the stone just b4 it hits the ground is ?

Physics

ABC is an equilateral triangle of side 4.0 cm in a vacuum. There are point charges of 8.0C at A and B. Find (a) the potential, (b) the electric field at C.

Physics.

An electron in a hydrogen atom is revolving around the proton in a orbit of radius r and velocity v .find the current.

physics

A cars starts from rest and after 20 seconds its velocity becomes 108 km-1 find the acceleration of the car

physics

In the figure below, the bar is 2.4 meters long and has a mass of 145 kg. To the nearest newton what is the tension in the wire?

physics

A cylindrical glass is 15cm long its diameter is 7cm. what volume of milk can be poured in it without spilling

Physics

A fired bullet sounds is heard after2sec .its speed in air is 340m\sec.what is the distance of sound.

physics

a simple pendulum has a period of 2.0s and an amplitude of swing 5.0cm.calculate the maximum magnitude of the acceleration of the bob

Physics

If two springs have their spring constants as k1 and k2 (k1>k2 . When they are stretched by same force what will be the relation between their elongations

physics

Find the force of gravity (in newtons) on a spacecraft 15100 km above the earth's surface, if its mass is 400 kg

physics

Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.

PHYSICS

A swimmer is capable of swimming at 1.4m at still water.caculate how far downstream will it smim across 180m?

physics

What is the minimum work in joules needed to push a 1210 kg car 54.0 m up a 12.5 degree incline? (Ignore friction.)

physics

A particle is drop from a vertical height (h) and falls freely for a time (t) with the aid of a sketch explain how (h) varies with (i) t (ii) t*2

physics

On a roller coaster, a student experiences an apparent weight of 1250 N while accelerating at 2.3 m/s^2 [U]. What is the students mass?

Physics

How much energy must be removed from 30 L of liquid water at 0-degree celsius in order to convert it to ice?

physics

A cube of ice, 28 cm on each side, is melted into a measuring cup. What is the volume of the liquid water? ------cm3

physics

Probability of getting two heads among 4 coins Complete the columns r Pr rPr (r - r̄)2Pr 0 1 2 3 4 sum

physics

Probability of getting two heads among 4 coins for r = 0, 1, 2, 3, 4 find values of Pr, rPr, (r - r̄)2Pr and sum of r

Physics

if a molecules in a solid has a temp of T = hf/2k then what would be the average energy of vibration 1) 0.88kT 2) 0.47kT 3) 0.62kT 4) 0.31kT

physics

Explain why helicopters need 2 rotors to fly in a straight line. Talking about centripetal force.

physics hw

Determine the stopping distances for a car with an initial speed of 87 km/h and human reaction time of 2.0 s for the following accelerations. (a) a = -4.0 m/s2 (b) a = -8.0 m/s2

physics (science)

A body travels from rest with acceleration 8m/s square . Find its velocity when it has covered a distance of 100m

physics

A small tiny nail may Pierce an inflated Tyre and remain there without pressure reduction.explain

physics

A passengers jet flies from one airport to another 1,200 miles away in 2.5h .Find its average speed.

Physics

At what frequency would a capacitor of 2.5 microfarads used in a radio circuit have a reactance of 250 ohms

Physics

A Man Of Mass 80kg Carry A Load Of Bricks Of 20kg Up A Vertical Of Length 6m Calculate The Workdone.

Physics

A Man Of Mass 80kg Carry A Load Of Bricks Of 20kg Up A Vertical Of Length 6m Calculate The Workdone

physics

Find the limiting velocity of a rain drop assuming diameter of 5.0×10^-4m.The density of air relative to water is 1.3×10^-3

Physics

Name any Margins of error that would happen in the lab "Which path requires the most energy? (gas)

physics

a car of mass 800kg attains a speed of 25m/s in a second.calculate the power developed in the engine

physics

A ball is thrown upward with velocity 5m/s calculate total distance covered by it ?{ Using formulae (v)2 -(u)2. =2gs}

physics

a uniform rod is 1m caring a weight of 100N calculate its tension of the string holding it an the reaction at the hinge

Physics

A girl of mass 25kg runs up a stress of total height 3.0m.find the work done against gravity.

Physics

A ball is thrown with a speed of 19m/s and at an angle of 46 degrees. How high does it go above the cliff to the nearest tenth?

physics

a car acclerate uniformly from rest andattains a speed of 40m/sin 10second itcoversa distanceof

physics

A stone of mass 5kg is thrown vertically upwards with velocity 10ms final calculate the height.

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?

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

math!! help pleaseee

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!!

4th grade Math

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

I'm doing my math homework. 25*f=100 or twenty-five times something equals one hundred? Please help me.

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?)

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, ...

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...

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 ...

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 ...

Math( 7th grade advanced math so 8th grade math)

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?

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 ...

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