Physics

The value of limiting friction for any 2 given surfaces is independent of the shape or area of the surface in contact so long as normal...

Posted by chandreyee123 June 17, 2013 at 1:34 PM via web. 2 educator answers. »

What is watt-hour squared the unit of ?

Posted by willldo June 1, 2013 at 8:31 AM via web. 1 educator answer. »

The human body, or for that matter, a body of any living organism is made out of tissues and each tissue is made from specific cells. Each...

Posted by Rocky52 May 31, 2013 at 8:26 PM via web. 1 educator answer. »

Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal? Answer...

Posted by user2607102 May 31, 2013 at 3:30 AM via web. 1 educator answer. »

I dont know whick forces it could be... what are all the forces that are involved in a stomp rocket(how can I identify this forces?)  -urgent...

Posted by user2114697 May 31, 2013 at 1:26 AM via web. Be the first to answer. »

Explain that motion and rest are relative term.

Posted by tubee May 30, 2013 at 4:11 AM via web. Be the first to answer. »

What is the difference between pitch and frequency?

Posted by maryam-ahmad May 19, 2013 at 3:39 AM via iOS. 1 educator answer. »

A common hydromenter with astem of 10cm long and volume one-tenth of whole hydrometer, floats with 2cm of stem above the water surface. What...

Posted by majontu May 9, 2013 at 5:01 AM via web. Be the first to answer. »

A plastic shpere and a metal sphere, both neutral are placed in an electric fiels and separated from each other. The diameter of the spheres...

Posted by mille94 May 1, 2013 at 7:31 AM via web. Be the first to answer. »

 1. A ray of light passes from air into water at an angle of 30.0 degrees. Find the angle of refraction. (22.1 degrees)

Posted by bwang96 April 30, 2013 at 7:23 PM via web. 1 educator answer. »

At what speed v will the mass of an object be 10% greater than its rest mass?

Posted by bwang96 April 28, 2013 at 2:19 AM via web. 1 educator answer. »

Hi, can you please help me answer these following questions? 1. You have won another space trip. This time you will be travelling at a...

Posted by bwang96 April 22, 2013 at 9:37 PM via web. 1 educator answer. »

Three point charges +6.4e-6, +2.5e-6, and -3.6e-6 lie along the x axis at 0m, .015m and .055m. What is the force exerted on q2 by the other...

Posted by sae755 April 22, 2013 at 5:20 PM via web. Be the first to answer. »

I have a robot with two arms. The first with a mass of 69kg and it moves at a speed of 4m/s. The second arm is mounted on the first arm and...

Posted by ianlimerick April 22, 2013 at 4:06 PM via web. Be the first to answer. »

Why do tires absorb heat caused by friction?

Posted by fushi April 18, 2013 at 8:10 AM via web. Be the first to answer. »

What is the force of friction when a car moves at constant speed of 60km/h & exerts constant force of 2.5 kN?

Posted by fushi April 18, 2013 at 8:09 AM via web. 1 educator answer. »

A uniform 1.5 T magnetic field points north.  In an electron moves vertically downward (toward the ground) with a speed of 2.5 x 10^7 m/s...

Posted by lkehoe April 14, 2013 at 4:44 PM via web. 1 educator answer. »

A 505 turn circular loop coil with a diameter of 15.5 cm is initially aligned so that its plane is perpendicular to Earths's magnetic field....

Posted by lkehoe April 14, 2013 at 4:40 PM via web. Be the first to answer. »

A 10.2 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.98 T pointing up.  During the...

Posted by lkehoe April 14, 2013 at 4:37 PM via web. 1 educator answer. »

A circular wire loop with a radius of 0.33 m is located in an external magnetic field of 0.60 T that is perpendicular to the plane of the...

Posted by lkehoe April 14, 2013 at 4:34 PM via web. Be the first to answer. »

what is the radiation  balance?

Posted by bedi555 April 8, 2013 at 3:02 PM via web. Be the first to answer. »

Given the coefficient of friction =1.0 and the mass of the object= 1.081 kg, at what incline angle would the object have started moving?

Posted by edelquinnparacuelles April 7, 2013 at 11:12 AM via web. 1 educator answer. »

Find the resultant of two force 130N and 110N respectively acting at angle whose tangent is 12/5  

Posted by bilal007 April 6, 2013 at 10:19 AM via web. Be the first to answer. »

A wire has a resistance R.  If the length of a wire is doubled and the radius is doubled, what is the new resistance in terms of R?

Posted by lkehoe April 3, 2013 at 2:30 AM via web. 1 educator answer. »

A coffee maker, which draws 13.5 A of current has been left on for 10 minutes.  What is the net number of electrons that have passed through...

Posted by lkehoe March 28, 2013 at 5:01 AM via web. 1 educator answer. »

What is the internal resistance of a 12.0 V car battery whose terminal voltage drops to 8.4 V when the starter draws 75 A?

Posted by lkehoe March 28, 2013 at 4:55 AM via web. Be the first to answer. »

A thin film of a material with n=1.3 is used to coat a piece of glass (n=1.5). For what minimum film thickness will there be no glare from...

Posted by johnyyyynnynyn March 27, 2013 at 3:55 AM via web. 1 educator answer. »

Suppose you are standing on a straight highway and watching a car moving away from you at 20.0 m/s. The air is perfectly clear, and after 11...

Posted by medusaaaaaaaaa March 27, 2013 at 3:53 AM via web. Be the first to answer. »

A light source contains two wavelength of light, λ_1=450 nm and λ_2=650 nm. It is incident on a diffraction grating with 1000 slits/mm and...

Posted by gomezzzzzzzzzzzzzzzzz March 27, 2013 at 3:52 AM via web. Be the first to answer. »

Light of wavelength 630 nm from a distant source is falling on a slit of width 0.5 mm. The diffraction pattern is observed on a screen 3.00 m...

Posted by luessssss March 27, 2013 at 3:50 AM via web. Be the first to answer. »

Light with a wavelength of 600 nm passes through a double slit and an interference pattern is observed on a screen 2.00 m from the slits. The...

Posted by vaderrrrrr March 27, 2013 at 3:49 AM via web. Be the first to answer. »

A piece of modeling clay is rolled into a cylinder and its resistance R is measured with an ohmmeter.  The clay is then rolled out so it is...

Posted by lkehoe March 26, 2013 at 4:00 PM via web. Be the first to answer. »

A 1-mile long wire has a resistance of 44 ohm. What will be its new resistance when it is shortened by cutting it in half (using only 1/2 of...

Posted by lkehoe March 26, 2013 at 3:56 PM via web. 1 educator answer. »

What are the properties of light?  

Posted by user3629853 March 25, 2013 at 10:25 AM via web. 1 educator answer. »

During a daytime football game you notice that a player's reflective helmet forms an image of the sun 4.3 cm behind the surface of the helmet....

Posted by stareem March 25, 2013 at 3:53 AM via web. 1 educator answer. »

a train travels at a velocity of 50+ m/s.It takes 80 s to slow down to 5 m/s with constant acceleration. what was its acceleration

Posted by dasmith22 March 22, 2013 at 8:03 PM via web. 1 educator answer. »

A car is moving 60km/h when the driver sees a signal light 40m ahead turn red. The car can slow with acceleration -0.5g (where g=9.80m/s2)....

Posted by rwanda255 March 21, 2013 at 7:05 PM via web. 1 educator answer. »

Two loudspeakers separated by 3.0 meters emit out-of-phase sound waves. Both speakers are playing a 686 Hz tone. If you are standing 4.0...

Posted by swimmers March 16, 2013 at 8:20 PM via web. Be the first to answer. »

A submarine with a cruising speed of 15.0 m/s uses a sonar (Sound Navigation and Ranging) device operating at 15000 Hz. The speed of sound in...

Posted by hockeyfan54 March 16, 2013 at 8:19 PM via web. Be the first to answer. »

Two loudspeakers emit out-of-phase sound waves along the x-axis. The sound has maximum loudness when the speakers are 30 cm apart. The sound...

Posted by mrbest55 March 16, 2013 at 8:17 PM via web. 1 educator answer. »

Two loudspeakers emit out-of-phase sound waves along the x-axis. The sound has maximum loudness when the speakers are 30 cm apart. The sound...

Posted by chocobob March 16, 2013 at 8:15 PM via web. 1 educator answer. »

The greater the acceleration, the greater the ______ exerted on an object.

Posted by boogalou1000 March 14, 2013 at 10:21 PM via iOS. 1 educator answer. »

A violin player hears four beats per second when she compares her note to a 523 Hz tuning fork. She can match the frequency of the tuning...

Posted by bobby9901 March 12, 2013 at 2:31 AM via web. 1 educator answer. »

A magician wants to perform an illusion where she appears on stage at one location but she is not there. How can she do this by using curved...

Posted by despair March 11, 2013 at 1:00 PM via web. 1 educator answer. »

How much work (in Joules) is done on a 1 kg object to lift it from the center of the Earth to its surface? The radius of the Earth is 6371 km.

Posted by Rocky52 March 6, 2013 at 1:32 AM via web. 1 educator answer. »

A projectile is fired at an angle of 43deg from horizontal. The intial speed is 30m/s. A 10meter high wall is placed 80m from the firing...

Posted by user8010328 February 27, 2013 at 5:13 PM via web. 1 educator answer. »

describe the experiment which describes boyle's law

Posted by ahonsi February 25, 2013 at 5:40 PM via web. Be the first to answer. »

water is prayed at an angle of 90 from the slope at 20 m/s. determine the range R  

Posted by user9157166 February 24, 2013 at 2:39 PM via web. Be the first to answer. »

What were the ideas of Galileo in relation to the nature of the motion of objects, and what experiments did Galileo perform to come to his...

Posted by gty7enoter February 15, 2013 at 2:35 AM via web. 1 educator answer. »

You and your friend are trying to heat up your identical fully insulated dinners using desk lamps.You put your food 25 cm from the lamp and...

Posted by luessssss February 12, 2013 at 11:26 PM via web. 1 educator answer. »