# Math/Physics

211,502 results, page 71

### physics

a cyclist does work at the rate of 500w while riding. how much force does her foot push with, when she is traveling at 8.0 m/s?

### Physics

is the mechanical energy of a teflon coated block sliding down a rough incline remaining constant?

### PHYSICS:

A boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10 cm high in 10 seconds.what is his power?

### physics

two equal vectors of magnitude 2A are inclime perpendicular to each other find the resultant and direction of vector.

### physics

what is the electric flux through a sphere that has a radius of 2.2m and carries charge of 5.3 micro couloumb at its centre? solution

### physics

How many hour will it take for a Bus to travel 1000 km. If it travels at an average velocity of 80 km/hr. assume constant acceleration.

### physics

A bob of a pendulum 100cm long swings through 20cm,find theta in radian and degree

### physics

Which of the following prefixes will multiply the unit by 1,000? Select one: a. Milli b. Mega c. Kilo d. Centi

### physics

a galvanometer has a resistance 60 ohm and is of 5mA full scale deflection.how would you modify it so as to get 0-10V voltmeter

### physics

a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up

### physics

please help The power rating of an electric motor which draws a current of 5 amperes from a 240-volt line is? a. 12.0 kW b. 1.2 kW c. 48.0 kW d. 4.8 kW

### Physics

A pan filled with hot food cools from 94°C to 86°C in 2minutes when the room temperaturs is at 20°C .How long will it take to cool from 71°C to 69°C ?

### 11 physics

a20Kg box is suspended from the ceiling by arope that weighs 1Kg . find the tension at the top of the rope.

### Physics projectile

If a body projected vertically upwards, give a graph showing variation in its kinetic energy

### Physics

A car starts to move nd accelerated at 4m/s2 for 8 seconds (u=0 V=32m/s a=4 m/s2 t=8) How fast is it moving? How far does it travel in this time?

### Physics

As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m's (128 mph) in just 3.5 s.

### physics

a stone of mass 50g is released from rest, Calculate it's kinetic energy after 6s from the beginning of the motion

### Physics

A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard

### Physics

A stone is dropped into a bore well 490m deep.after how time,the sound of splash of will be heard

### Physics

When light passes from one medium to another then which of the following parameters may change? Velocity, frequency, colour or wavelenght?

### Physics

Find the speed of a pendulum bob at the bottom of its swing if its initial displacement is 5.34o and its period is 2.534 s.

### physics

A ball is thrown from a height h and another from 2h.find the ratio of time taken by the two balls to reach the ground.

### physics

A ball is thrown from a height h and another from 2h.find the ratio of time taken by the two balls to reach the ground.

### 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

What acceleration would a 35 KG box have if we pushed it with a force of 275 N across a surface that has a coefficient of friction of .7?

### 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

(needed for my strain calculations) is the percentage uncertainty in a ruler 0.1cm or 0.1mm? Please answer quick.

### physics

Calculate the escape velocity on surface of earth of radius of moon is 1740km and Massis7.4 *10to the power 22

### Science - Physics

how much power is in my bicep if i can lift 50kg a height of 50cm 40 times in one minute?

### Physics

If the gravitational force between the electron (9.11 ✕ 10-31 kg) and the proton (1.67 ✕ 10-27 kg) in a hydrogen atom is 1.06 ✕ 10-47 N, how far apart are the two particles?