Math/Physics

206,302 results, page 38

PHYSICS

Why do objects gain mass while approaching the speed of light

physics

what is the importance/significance of calculating the magnetic flux density of a solenoid?

physics

Find the relation between phase difference and path dofferense

physics

A proton is confined to a nucleus of radius 5 FM.what's the minimum uncertainty in momentum?

physics

a woman drives at a speed of 70 mph how many miles does she travel in 24 minutes

physics

Michael, whose mass is 80 kg, runs at a speed of 3 m/s. What is his kinetic energy?

Physics

When projectile angle is 45°what is the relation between maximum height and range

physics

Calculate the momentum of a 100 kg object moving with velocity 10m/s

physics

Calculate the momentum of a 100 kg object moving with velocity 10m/s

Physics

If a man walks 4 km east and then 5 km south. How far is he from the point where he started?

physics

Distance travelled by a ball dropped from a cliff in the 10th second.

physics

how much work is done when 100 kg lifted 5 meters above the ground

physics

Find the density of the earth if its mass is 6×10^3kg and radius is 6.4×10^3km

Physics

what must be the net force if a 19.9 kg mass accelerates to the left at a rate of 2.2m/s^2?

Physics

Find, to 3 decimal place, the frequency of the hour hand of a clock

physics

How much work is required to lift a 5.2-kg concrete block to a height of 3.1 m?

mathematical physics

Using Stokes' theorem evaluate ∫c F.dl where F = yi^+ xz^3 j^-z y^3 k^ and C is the circle x^2+ y^2 = 4; z = -3.

physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C?

physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C

Physics

A 20 kg block is placed on a 35 degree ramp. What is its true metric weight?

physics

some rocks melt at 1800farenheit. what is the temperature in the celsius scale ?

Physics

The density of an object is 1500kgm-3, the mass is 10000g find the volume

Physics

What are some scientific questions that can be asked about projectile motion?

physics

A gas occupies 20 dm³at 30°c at 2.5 atm find its volume ayt s.t.p.

Physics

Which of the following is an element? H2O Hydrogen Carbon dioxide A supernova

physics

A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?

physics

Which of the following statements is false regarding the ‘drift’ of charge carriers?

physics

if r1=2ohms, r2=4ohms, r3=6ohms. Then what is the voltmer reading connected in series

physics

What is the pressure of the water in pascals at the bottom og a lake which is 5 meters deep?

Physics

What is the reaction of the earth pulling down on a pen that is lying on a table

physics

A bicycle starts from rest and reaches 6.0 m/s after 4 seconds. What is its acceleration?

physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

physics

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

Physics

If a force of 15kg. wt acts on a mass of 14 kg, what will be its velocity after 8 seconds?

physics

how much work is done if a force of 12N moves an object a distance of 5m

Physics

What is the work done when a force of 30Newtons moves through a distance of 20Meters?

Physics

if a molecules in a solid has a temp of T = hf/2k then what would be the average energy of vibration

physics

How does a washing machine's 'spin cycle' expel water from clothes?

physics

Explain why helicopters need 2 rotors to fly in a straight line.

physics

ifv=(3i+4j+5k)m/s is the instantaneous velocity of a body mass 1.50kg calculate its K.E

Physics

What is the period of a wave that travels through a spring at 2.5 m/s and has a wavelength of 1.3 meters?

Physics

1.A Speed Of A Bullet Of Mass 20g Is 200km/h. What Is The Kinectic Energy.

Physics

How much force does it take to push an 80 lb. steel cart on wheels?

Physics

calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph

Physics

How meny watts need to up the 18kg in 4mtr per 15 second

physics

What is the effect of increasing the inclination of the track to the acceleration of the rider in the experiment?

Physics

When a mass is hung from a spring stretches it by 15 cm. What is the period of the oscillations of this system?

physics

Cylinder water tank 80cms height 1000liters what is its diameter

physics

If a car has a mass of 400 kg and a velocity of 30 m/s to the east, what is the magnitude of its momentum?

Physics

Find the centripetal acceleration of a car that rounds an 80 m radius curve at 10 m/s.

PHYSICS

If that charge is 3.7 μC , by what percentage does the mass of a 31 g comb change during charging?

physics

What force is needed to accelerate a child on a sled (total mass = 60 kg) at 1.25 m/s2?

Physics

How much heat is needed to melt 14.3kg of silver that is initially at 44°C?

Physics

Which of the following wavelengths will produce standing waves on a string that is 1.9 m long? A.1.9 B.3.3 C.3.5 D.95

physics

a skydiver has amass of 140 kg.at what speed will she have a momentum of 10,000 kg m/s?

physics 1

what is the peiod of vibrating object which an acceleration of 8.0m/s .when its displacement is 1.0m?what should be the answer?

physics 1

what is the peiod of vibrating object which an acceleration of 8.0m/s .when its displacement is 1.0m?what should be the answer?

Physics

A charge q is placed at h distance from the base of centre . Find the flux ?

Physics

In what part of the electromagnetic spectrum does the wavelength 0.0141 nanometers belong in?

physics

lighted matchstick brought near the negatively charged electroscope

physics

Two instances during which the heating effect of current is not required

Physics

What effect do the following forces have on point? 100N, 30 degrees E of N

physics

Instances where the heating effect of current is not required. Plssss helllp

physics

Instances where the heating effect of current is not required. Plssss helllp

Physics

A car travels at a speed of 70km/h. What distance will it cover in 30 minutes

Physics

A car travels at a speed of 70km/h. What distance will it cover in 30 minutes

physics

if a body moves 3m north,then 4m East and finally 6m South.what will be the displacement?

Physics

Does the speed of sound in air depend on the frequency of the wave? V=[(gamma.RT)/M]^(1/2)

Physics

A 900 W toaster operates for 2.50 minutes. How much energy does it use?

physics with algebra

what is the area, and its approximate uncertainty, of a square of side 3.1x10^4 cm?

physics

A car accelerates from rest at -2.10 m/s2. a. What is the velocity at the end of 4.0 s? b. What is the displacement after 4.0 s?

Physics

What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?

Physics

Does a ball that is rolled on a floor speed up before slowing down?

Physics

PLEASE HELP! I'm doing a physics demonstration, and in part of it I'm trying to explain why steel wool burns and normal steel doesn't. I know it's something to do with the smaller surface area and/or mass but I don't know WHY it burns because of this. Can anyone help me? I'm ...

physics

How do i go about this question? Suppose a car is traveling at 20.0m/s, and the driver sees a traffic light turn red, After 0.530s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at 7.00m/s2. What is the stopping distance of the car, as ...

math, algebra

what are some challenges about working with rational expressions? Math is a language. Getting it precisely right is a lot easier than describing it in a vague statement in English such as you ask. Is there a chance you can change teachers? If so, I recommend it. THe focus of ...

Math

Sorry if this is a lot of questions but What do you hear when you hear the word math? What do you believe when you hear the word math? What do you think when you hear the word math?

Math

Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and describe what coping ...

Math

I have trouble with math, I'm very good at science and when I grow up I want to be a zoologist, the problem is that. MATH I try to pay attention at school but the teacher is very boring and I'm one of those people that can't pay attention when bored. Any tips?

physics

An inquisitive physics student and mountain climber climbs a 50.0 m cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.08 m/s downward. (a) ...

Math (Combinatorics)

40 students attended the brilliant summer camp at Stanford University. "k" of the students at the camp are working on math problems and the others are working on non-math problems. One of the camp mentors noticed that whenever all the students were partitioned into 2 or more ...

statistics

The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 1. The range of the math scores equals the range of the verbal scores. 2. The...

Physics

Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an ...

MATH

I get really confused with math . I am great with all of the other subjects . In fact I get all B's except for Math , I get 1's !!! I really need help with it . I ask for help but whenever people help me and put it in the most simplest way possible .. I still don't get it . I ...

Algebra 2

Well I'm curently taking this class as a sophmore and have taken geometry freshmen year of high school and also I am taking physics at the same time and in math class when I'm asked to factor i go absolutley nuts because guessing numbers is just no my thing... I need solve for...

math/What is a interval in math terms?

doe sanyone know what a interval is in math terms? i need the real definition and it is hard and i can not find it anywhere? can anyone help me? thanks,you rule Kayla an interval is "a mathmatical expression of 'betweeness' a---------b or a<x<b this can also be written ...

Physics please check

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...

Math

I need help with my math homework.I searched for homework help forums and I found the Jiskha Website on the Google Website so this is my first time.I am new. Math Homework: What is the value of number 3 in 2,539? What is the value of number 9 in 4,879 What is the of number 6 ...

Math

John has scores of 88,73,90,85,93 on five math quizzes. What scores must john earn on the next math quiz to have a mean quiz score of exactly 88?

physics- torque

1. Find the magnitude of the torque produced by a 3.0 N force applied to a door at a perpendicular distance of 0.25 m from the hinge. 2. A simple pendulum consists of a 3.0 kg point mass hanging at the end of a 2.0 m long light string that is connected to a pivot point. a. ...

physics hey bob

you help me solve this problem. but how am i suppose to if i don't know the mass of the car? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same automobile on a simalr road with the slope 1...

math

Decide which variables described is likely to have a normal or near normal distribution a. the number of courses remaining until graduation for the students in a small liveral arts college b. the SAT math scores for students in an advanced placement math class i think the ...

Physics

posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached...

physics

We're in class with a SIL decibel meter up front, and everyone is screaming at the top of their lungs, hooting and shouting and pounding on their desks, shooting off firecrackers, its Phys 1240 gone wild...and the meter is reading a reasonably steady sound intensity level of ...

Physics

For the answer to the following post, do you mean that the frequency does not depend on the radius? Posted by Johnny on Saturday, March 13, 2010 at 5:49pm. The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does ...

PHYSICS

Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me. PHYSICS - drwls, Saturday, February 6, 2010 at 2:15pm To help you answer that question, I'd need a figure that shows what kind...

algebra 2

Lincoln High School has 98 teachers. Of the 42 female teachers, 8 teach math. One seventh of all of the teachers teach math. What is the probability that a teacher is a man or does not teach math?

math

i m always having a problem in math. i can't do fraction easilly. im going to have an final exams , starting on 2 april . i hope if any one can help me. You need to tell us, in detail, what you don't understand about fractions. o!isnt the test the...SAT?? yes,,im good at math ...

Physics. Urgent

A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...

physics

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...

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