# physics please HELP !

74,851 results, page 66-
## physics

calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one. where S=0.072N/m -
## Physics

Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water) -
## physics

A stone is thrown straight up. To reach a height of 6.74 m above its release point, what must its initial speed be in m/s -
## Physics

Find the electric potential at the centre of the square of side 1m at the four corners of charges of q1, q2,q3,and q4 are placed having values 3×10^-8C,-3×10^-8C,-5×10^-8C and 6×10^-8C respectively. -
## Physics

Calculate the length of a displaced pendulum Bob which pass through its lowest point twice every second. Take g=10m/s² -
## 11th grade Physics

What resistance would produce a current of 120 amps from a 6-volt battery? -
## Physics

A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes? -
## Physics

calculate pressure in each foot?elephant 3200kg covers in each its feet an area equal 0.08(ms) -
## Physics

What is the gravitational force between two identical 4,500 kg asteroids whose centers of mass are separated by 120 m? -
## Physics

Displacement is to distance as velocity is to: a. acceleration b. mass. c. speed. d. time I chose C....is this correct? -
## 11th grade Physics

What voltage is necessary to produce a current of 200 amperes through a resistance of 1 x 10^-3 ohms? -
## physics

calculate the energy evolved when 8 droplets of water of radius 1/2mm each combine into one. where s=0.072N/m. -
## physics

Consider two charges, where one (+1.90 nC) is at the origin and the other (-3.61 nC) is at the position x = 4.35 cm. Find the x-coordinate where a proton would experience zero net force. -
## physics

A car going at 30 m/s undergoes an acceleration of 2m/s squared for 4 seconds. What is it's final speed? How far did it travel while it was accelerating? -
## physics

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

How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile) -
## PHYSICS DUE SOON

A 95.1-g ice cube is initially at 0.0°C. (b) What is the change in entropy of the environment in this process? ___________J/kg -
## Physics

A 2.73 kg particle has a velocity of vx = 6.02 m/s and vy = 0.316 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s -
## Physics

Suppose that you want to take a photograph of yourself as you look at your image in a flat mirror 1.6 away. For what distance should the camera lens be focused? -
## physics

How fast (in ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000 's? -
## physics

It two objects are thrown off a tall building and one is three times the mass of the other, do they hit the ground at the same time? -
## physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!! -
## physics

What is the power delivered by a motor lifting an elevator weighing 1250kg up 89 floors at 16.8 meters per second -
## physics

If I threw a ball vertically at an initial speed of 34.5 m/s, how many seconds would it take to reach its maximum height? -
## Physics

You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope. -
## physics

if some of water in calorimeter splash out when tranfering the metal block, will it affect the experiment result? -
## Integrated Physics and Chemistry

What are a few of the positive things the Equal Rights Amendment would have done for women in America? -
## Physics

If 2.4 m3 of a gas initially at STP is compressed to 1.6 m3 and its temperature raised to 30oC, what is the final pressure? -
## Physics

What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by distance of 5.29x10^-9 cm. -
## physics

How will the weight of a 20kg object change if it was in a lift that accelerates downward at 4 meters per second squared? -
## physics

find the change n momentum of a 1120-kg car that increases its speed / what minimum force is need to do this? -
## physics

light from the sun travels 1.5x10km to reach the earth .how long does it journey take in minutes? -
## physics

when two lenses of focal length +10cm and -5cm are placed in contact then find the net power ? -
## Physics/ optics

An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual? -
## Physics

Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given) -
## physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace? -
## physics

a rolling ball covers a distance of 650m in 20 min. its speed in kilometer per hour will be what? -
## physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace? -
## physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace? -
## physics

How can the equation be prove:maximum height,time of flight and maximun range in projectile? -
## Physics

An ideal gas performs 453 of work and loses 45J of internal energy -
## physics

List four effects that can be observed that demonstrate light travels in straight lines. Does anybody know the answer?? -
## physics

A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it? -
## Physics

A Brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change. -
## Physics

a boat sails 150km N60°E, then 100km West. What is it's displacement from its starting point? -
## Physics

Calculate the resistance of a 900 watt toaster operating at 120 volts. Which formula do you use? -
## Physics

What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by a distance of 5.29x10^-9 cm -
## physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s? -
## Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s? -
## Physics

In the Theory of Special Relativity, the momentum of a massless particle is equal to which of the following? A. m0c^2 B. E2c^2 C. E/c D. E/c^2 -
## physics

A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time?? -
## physics

Does the following represent a sample or a population? calories created while burning all of the coal taken from a rail car -
## physics

At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 81 km/h to 107 km/h? -
## 11th grade Physics

What happens when an insulator is wired in parallel with the bulb? is the swich open or closed? -
## physics

What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 9 m? the answer in Hz -
## 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

determine the image distance for an object that is 45.0 cm from a double convex lens having a focal length of 15.0 cm -
## physics

A box is pushed without acceleration 9.0m along a horizontal floor against a frictional force of 100N. How much work is done? -
## 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 - Magnetism

The direction of magnetic lines of force change if an iron piece is placed in its field. Why? -
## physics

Is the acceleration due to gravity more or less atop Mt. Everest than at sea level? Defend your answer. -
## physics

a car is moving at 17.7 m/s when it begins to slow down with a deceleration of 2.5 m/s2. how long does it take to travel 20 meters as it slows down -
## physics

What is the magnitude of the momentum of a car weighing 1,555 N when it is moving at a speed of 23 m/s? Express your answer in kg m/s. -
## physics

A car traveling at 70 km/h. It then accelerates at 3.6m/s^2 to 90km/h. How long does it take to reach a new speed. How far does it travel during acceleration -
## physics

if the direction of a magnetic field around a straight wire is counterlcockwise, which direciton is the current traveling? -
## physics

Resultant displacement from 12m east to5m north to9m vertically upward -
## college physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples. -
## Physics

6. If your boat weighs 1200 N, how much water will it displace when it’s floating motionless at the surface of the lake? -
## Physics

If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2? -
## Physics

In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2?? -
## Physics

In the Theory of Special Relativity, the momentum of a massless particle is equal to which of the following? A. m0c^2 B. E2c^2 C. E/c D. E/c^2 -
## physics

For an object in equilibrium the sum of the torques acting on it vanishes only if each torque is calculated based on your: -
## PHYSICS ROLLING MOTION!!!

A unicycle with a tire 44.0 cm in diameter travels 2.00 km. How many revolutions does the wheel make? -
## applied physics

Calculate the magnitude of the torque produced by two 25N forces that are 3m apart and in opposite directions -
## Physics

If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? -
## physics

what is the force in newtons acting on a 4.0kg package of nails that falls off a roof and is on its way to the ground -
## Physics

A,B,C,D are four charges placed at each corner of a square, with A= -6.00 mC , B=6.00 mC, C=-6.00 mC and D=6.00 mC.ALso AB=BC=CD=DA=0.100 m.Determine the magnitude and direction of force on each charge. -
## physics

How much potential energy does DeAnna with a mass 62.0 kg, gain when he climbs a gymnasium rope a distance of 3.5 m? -
## physics

A particle is projected with a speed of 39.2m/sec at an elevation of 30degrees.find its greatest height. -
## physics

You throw a ball upward from a window at a speed of 2.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below? -
## Physics

A boy sledding down a hill accelerates at 1.25 m/s2. If he started from rest, in what distance would he reach a speed of 5.00 m/s? -
## Physics

What potential energy does a 60.0-kg gymnast acquire in climbing 5.00 m up a vertical pole? GIVEN: mg = 60 h/d = 5.00 m PE = mgh PE = (60)(5.00) PE = 300 J -
## physics/science

i don't understand why radioactive waste is stored underground is it because it is a harmful substance -
## Physics

A 2.0-kg rock falls from a height of 25 m to a point 20 m above the ground. How much potential energy does it lose? GIVEN: mg = 2.0 kg h/d = 5 m PE = mgh PE = (2)(5) PE = 10 J -
## physics

show the expression v=at is dimensionally correct where v represents speed an acceleration and t is instant time? -
## physics

what net force is needed to accelerate a 2.0kg mass from rest to a velocity of 10m/s in 5.0s -
## Physics

If the Kitty Hawk Flyer has 12 HP how would you express this power in the SI system and report the numerical value in kilowatts? -
## maths lit,physics,life science n tourism

i don't know which career to choose can you help me ?I'm doing grade 11. -
## Physics- 8th Grade

What force is needed to accelerate a 10 kilogram shopping cart 3 m/s^2 (squared)? -
## physics

How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s? -
## Physics II

find the pressure at the bottom of a vessel 76cm deep when filled with a) water b)mercury (sp.g. 13.6) -
## physics

How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s? -
## physics

If you cover your home thermostat with a blanket, will it make the house hotter or colder, or have some other effect? -
## physics

What force is necessary to keep a 2.00x10^3 car moving up a 15.0 degree incline at a constant velocity? (Mu=.200) -
## physics

Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s -
## physics

how high a building can superman jump over if he is to leave the ground with a velocity of 60 m/s at an angle of 75 degrees -
## Physics

How much work is done by a girl weighing 450N while carrying a 2kg package up a 2m flight of stairs? -
## physics

Two stones one at equator and the other at poles are allowed to fall from same height and at same time.which one will strike the ground first? -
## physics

vector b has x,y, and z components of 4.0, 6.0, and 3.0 units, respectively. Calculate the magnitude of b and the angles that b makes with the coordinate axes. -
## Physics

An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?