# physics please HELP !

74,755 results, page 63-
## physics

A body is executing of amplitude 1m . Its velocity while passing through mean position is 10m/s . Find its frequency -
## 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/science

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

How much work does a refrigerator with a COP of 3.8 require to freeze 660 g of water already at its freezing point? -
## physics

My teacher needs us to formulate a question for the science fair. Till now, we have only learned the Kinematics equations, HELP, please.... -
## Physics

Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J. Answer in units of m/s. -
## physics

if a pitcher throws a ball at 101 mph and it trvels 60.5 feet. How much wiil it drop? -
## Calculus

no one on physics forums seems to know the answer so I was wondering if you guys could help post anser on these forms of course if you can help my question is here h t t p : / / w w w . p h y s i c s f o r u m s . c o m / s h o w t h r e a d . p h p ? t = -
## physics

a pendulum with a length of .600 m has a period of 1.55 s. what is acceleration due to gravity at the pendulums location -
## physics

if a car moving 180km/h reduces to 72km, what is the percentage change in kinetic energy? -
## physics

a 747 airliner reaches its takeoff speed of 170 in 35.0 .what is the magnitude of its average acceleration -
## mathematical method of physics

expand 3sin(4x)+4cos(10x) in to functional series of e(exp)ix -
## physics

During a hard sneeze, your eyes might shut for 0.43 s. If you are driving a car at 125 km/h, how far does it move during that time? -
## Physics

What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state? -
## physics

When a transverse wave on a string is reflectred from the free end the phase change produced is------- -
## physics

two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them? -
## 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 4s -
## physics

An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity? -
## physics

What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 0.84 ± 0.04m ? -
## physics

The force of tension of a rope is 300N. If a man is 50 m above the ground, what is the longest time it could take him to get to the bottom? -
## 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

two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them? -
## Physics

A skydiver has a terminal velocity of 9.0 m/s. If they have a mass of 98, what is their k value for their air resistance? Use g = 10 m/s/s and do not report units on your answer, they should be N s/m. -
## physics

Why does the pitch of the sound produce by blowing over an open end of a bottle change when you have more water in it? -
## physics

At what rate is a 60.0-kg boy using energy when he sprints up a flight of stairs 10.0 m high in 8.00 s? A. 75.0 W B. 48.0 W C. 735 W D. 480 W E. 4.80 kW -
## ap physics

How fast would a 1200 kg car travel if it had the same linear momentum as a 1500 kg truck traveling at 90 km/h? -
## 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

what is the kinetic energy of a 3 kg 20 cm diameter bowling ball with a linear velocity of 4m/s? (rolling and spinning) -
## physics

state the energy hans-formation which occurs when a car is brought to rest by its break -
## PHYSICS ROLLING MOTION!!!

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

true or false: according to einstein, a gravitational field is equivalent to an accelerating frame of reference. -
## PHYSICS

lIST THE PARTICLES THAT MAKE UP AN ATOM. wHAT ARE THEIR CHARGES? hOW ARE THEY ARANGED? wHAT IS THE APPROXIMATE AMU OF EACH PARTICLE? -
## Physics

List the particles that make up an atom. What are their charges? How are they arranged? wHat is the approximate amu of each particle? -
## 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

What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 Hz? -
## AP Physics B

What is the force of Friction as a 12 kg object slides down for 30 meters down a 30 degrees incline at a constant velocity? -
## physics

You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to -
## physics

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

Why is the voltage of the electricity produced by power stations is increased before its transmitted through the national grid? Please help Thanks -
## Physics

A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump? -
## Physics

A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2? -
## Physics

A student walks from her apartment a distance d=139m to the bus stop at a speed of v1= 1.40m/s. -
## physics

an elevator weighing400kg is to be lifted up at a constant velocity of 3cms-1 what would be the minimum power of motor to be used -
## Physics

How much potential energy does Tim, with mass 60.0 kg, gain when he climbs a gymnasium rope a distance of 3.5m? -
## Physics

How much work must be done to bring three electrons from a great distance apart to within 2.1Ã—10âˆ’10 {\rm m} from one another (at the corners of an equilateral triangle)? -
## physics

determine the velocity and kinetic energy of neutrons having de broglie wave length 1 angstrom -
## Physics

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

What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6 -
## Physics

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

What is the car's forward acceleration,at a speed of 30m/s,when the driving force on the wheels is 650N -
## Physics

A stone with a mass of 20kg and density of 20,000kg/m3 is immersed in water. Find its weight -
## 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

What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m? -
## Physics

What is the mass of water in a closed room 5.2m x 6.3m x 2.5m when the temperature is 24 degrees celsius and the relative humidity is 65%? -
## physics

an airplane taking off from a landing field has a run of 500m. Calculate the average acceleration in ft/s2. -
## Physics

A hot plate has a resistance of 50 Ω. If the current flowing through it is 2.4 A, then the potential difference across the device is: -
## Physics

An elevator is moving upward at 0.90 m/s when it experiences an acceleration 0.40 m/s2 downward, over a distance of 0.64 m. What will its final velocity be? -
## Physics

The speed of light in vacuum depends on, 1)wavelength 2)frequency 3)intensity 4)temperature 5)none of the above I know that 1 and 2 are correct. What about the others? -
## physics

A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 6.10 m/s? -
## physics

explain why microwaves are better carriers of signals for long range transmission of radio waves? -
## Physics

Two objects of masses m1 and m2 fall from the height respectively. The ratio of the magnitude of their momenta when they hit the ground? -
## physics

a ball of mass m is thrown vertically upwards with Vo= 10j m/s. Study nature of motion -
## PHYSICS

AN OBJECT MASS OF 10KG IS PLACED ON AN INCLINED PLANE AT 30 degree at the horizontal calculate recreation between two su -
## physics

Determine the cubical expansion of a liquid of volume 20liters at 30Â°c and 20.35 liters at 100Â°c -
## physics

A spring has k = 88 N/m. Use a graph to determine the work needed to stretch it from x = 3.6 cm to x = 5.6 cm, where x is the displacement from its unstretched length. -
## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS -
## physics

What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s? -
## physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 7.9 m/s when going down a slope for 7.4 s? -
## PHYSICS

the following data were obtained for the position of a ball as it rolled along a straight track DISPLACEMENT (CM) TIME 2.90 0.60 7.40 2.10 11.00 3.30 22.70 7.20 31.10 10.00 -
## physics

Find the force when two poles to strength 100 and 90 cgs units are placed at a distance to 20 cm a part. -
## PHYSICS

he following data were obtained for the position of a ball as it rolled along a straight track DISPLACEMENT (CM) 2.90 7.40 11.00 22.70 31.10 TIME 0.60 2.10 3.30 7.20 10.00 -
## Physics

What is the tension in the string in (Figure 1) ? The volume of plastic ball is 95 cm3 and the density is 840 kg/m3. -
## PHYSICS

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal How far does it move vertically -
## physics

how long will it take a car to cover a distance of 500 meters if it accelerates from rest at a rate of 5.50 m/s2? -
## Physics

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

14,0 of KOH is neutralised in 1dm^3 of water by sulphuric acid with a concentration at 0,1 mol dm^-3 how do i calculate it -
## Physics

How many calories of heat will a person lose by evaporating 1250g of water and perspiration in a day? -
## Physics

I have a 1000 ohm resistor with a measured resistance of .967 how do I use submultiples or mutliples to get it in the SI units? -
## Physics

how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m? -
## physics

A stone of mass m kg is held h metres above the floor 50s.The workdone in joules over this period is -
## physics

George takes off for a long jump at an angle of 28 degrees, and lands 6.9 m away. How fast was he when he jumped? -
## physics

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

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

An object with a mass of 3kg is dropped from 56.3 meters. How far above the ground is it's kinetic energy 1073J? -
## 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

A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m. -
## physics

problem E2_2 Strain, boundary conditions, displacement and elongation: Part I Plz help. -
## Physics

Two equal charges of magnitude 0.00000000032 is placed in an electric field. calculate the force of attraction between them -
## physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h? -
## physics

How much potential energy does DeAnna with a mass 57.0 kg, gain when he climbs a gymnasium rope a distance of 3.7 m? -
## Physics

A 100-n boulder is sitting on a shelf 0.5 meters above the floor. What is the potential energy when its in its new location? -
## 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

how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m? -
## physics

a 333 hz and 337 hz tuning forks are struck simultaneously. whats will be the beat frequency? -
## physics

a person throws a ball upward into the air with an initial velocity of 20.0 m/s, calculate how high it goes -
## Physics

In an AC circuit with a frequency 25 Hz producing an rms voltage of 30 V and a 20 farad capacitor, what is the end current? -
## Physics

What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m? -
## physics

An airplane lands and starts down the runway at a southwest velocity of 44 m/s. What constant acceleration allows it to come to a stop in 1.3 km?