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Tell Me How Forums : Science

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Physics!!

By: Kim7827 [4-October-09 7:58PM]
1 posts

If the world's population moved to the north pole and the south pole, would the 24-hour day become longer, shorter or remain the same?

Physics!!


Dashhhh [23-October-09 12:43PM]
1 posts
No photo yet

A dart player throws a dart horizontally at a velocity of 12.4m/s/s i. The dart hits the board -.32m j from which it was thrown. How far away is the player from the board?

Physics!!


Enaaly [5-November-09 8:26AM]
1 posts

An object is falling under gravity with terminal velocity.What is happening to its speed?
A) It is decreasing to a lower value.
B) It is decreasing to zero.
C) It is increasing.
D) It is staying constant

Physics!!


Wmudfoot [11-November-09 8:00PM]
1 posts

Trying to conclusively recall am equation. Regarding a definition of power. Does P=MV...does power equal mass times velocity?

Physics!!


Raj123 [25-November-09 11:48AM]
1 posts

WHY SHOULD WE KEEP POWERFUL MAGNET AWAY FROM CASSETTES,MOBILES,TELEVISION,MUSIC SYSTEM,COMPACT DISK AND THE COMPUTER ?

Physics!!


Abhaya [15-January-10 2:11AM]
1 posts

We prefer a potentiometer to measure e.m.f of cell than voltmeter. Why?

solenoid related headache


Msatitma [16-January-10 7:11PM]
1 posts
profile picture

Hi everyone. if we have a solenoid with magnetic core inside, a magnetic field B that is going through the core is changing (no mangetic field lines are passing through the wire of the coil. magnetic field lines exist only in the core. so the change in B exist only in the core). will there be any induced current in the coil wire ?!

Physics!!


Saddy Cool [27-January-10 11:48AM]
1 posts
No photo yet

If bar magnet is cut into equal half then polarity gained on the nearer side of the magnets are opposite. then why don't they attract ?
near side means the point from where they have been cut off..

Physics!!


Aliyabaig [6-February-10 1:46PM]
1 posts
profile picture

A piece of metal of unknown volume is immersed in water by means of a thread.Before lowering into water,the tension in the thread is 10N.the tension in the thread when the piece is immersed in water is 8N.Find the density of the metal

Re : Physics!!


Maxx007 [10-February-10 9:54PM]
1 posts
No photo yet

What average force is exerted on a 25-g gee by a bed sheet if the egg hits the sheet at 4m/s and takes 1.5 s to stop? (in kilograms)

Re : Physics!!


Karacorey [3-March-10 7:08AM]
1 posts

A cheetah runs approx 96km per hour,how many metres can it cover in 15secs? and @ what speed does it maintain?

Re : Physics!!


Pandaram [4-March-10 6:49PM]
1 posts
No photo yet

Please can u tell me the difference of mass and weight in a simple way. for instance, if u eat a burger and fries does u mass go up, stay the same or go down?
I am so confused so please help me asap.
thanx

Re : Physics!!


Knowitall [10-March-10 12:15AM]
653 posts

I think mass is the absolute amount of "stuff" in something, so it doesn't change.

The weight however includes the pull of gravity.

Therefore your weight on the moon is 1/6th that on the earth because the moon has much less gravity, but your mass is the same.

Re : Physics!!


Chris1 [12-March-10 12:37PM]
1 posts

If a .1 kg mass revolves at the end of a string .5 m long, and its period id 1 sec, calculate the centripetal force.

Re : Physics!!


Daveyc [14-March-10 5:03PM]
117 posts

If you search on google for centripetal force then there is information on the equations to calculate what it is.

Re : Physics!!


Mizanur [6-April-10 8:10PM]
1 posts
No photo yet

An airplane accelerates down a run-way at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.

Re : Physics!!


Pandark1 [29-April-10 10:17AM]
1 posts
No photo yet

What force is exerted when we press a rubber ball on two hands. What will happen to the rubber ball.

Re : Physics!!


Rishabh [25-June-10 4:47AM]
1 posts

Define combination

Re : Physics!!


Psahu63 [8-September-10 11:43AM]
67 posts

The distance traveled by the airplane, S = 1/2 at^2 = 1721.344m.
Where, a = acceleration, t = time.

Re : Physics!!


Psahu63 [8-September-10 11:58AM]
67 posts

The angular velocity,ω=2π/1=2π. Therefore,linear velocity, v=ωr=2πr. Now,centripetal force=mv^2/r=0.1*(2π*0.5)^2/0.5=1.97392Newton.

Re : Physics!!


Psahu63 [8-September-10 12:32PM]
67 posts

The velocity of the cheetah, v = 96 km/hr =96000/3600 m/s.Time,t = 15 sec.
We know, distance, S = vt = (96000/3600)*15 = 400 m.

Re : Physics!!


Psahu63 [9-September-10 6:13AM]
67 posts

The power is not equal to mass*velocity. Hence, your question is wrong.

Physics help!


Annajay [18-September-10 9:39PM]
1 posts
No photo yet

A passenger in a moving train drops an apple. A man standing by the train tracks sees through the window the apple falling:
A) vertically down.
B) on a parabolic trajectory in the opposite direction of the train motion.
C) on a linear trajectory in the opposite direction of the train motion.
D) on a parabolic trajectory in the direction of the train motion.
E) on a linear trajectory in the direction of the train motion

Re : Physics!!


Asutosh [20-September-10 6:04AM]
1 posts

What is the formula of force for a dielectric when introduced partially in between two charges

Re : Physics!!


Psahu63 [21-September-10 5:28PM]
67 posts

A) Vertically down.

Re : Physics!!


Nayani [22-September-10 5:31AM]
4 posts
profile picture

WHEN AN OBJECT FALL IN GRAVITY IT IS INCREASING IT'S SPEED

Re : Physics!!


Avinash [10-October-10 2:55PM]
18 posts
profile picture

Its speed is increasing as the body has zero velocity on the highest point.

Re : Physics!!


Avinash [10-October-10 3:00PM]
18 posts
profile picture

Power - the capacity to do work is known as power .
in the newtons 2nd law of motion momenta is defined as the total total force possesed by a body , which is equal to the product of mass and its velocity.

Re : Physics!!


Avinash [10-October-10 3:07PM]
18 posts
profile picture

CASSETTES,MOBILES,TELEVISION,MUSIC SYSTEM,COMPACT DISK AND THE COMPUTER contain data in the digital .which is actually being saved in these equipments in the magnetic form . and if we keep powerful magnet near it the data stored in the magnetic form can be distorted ,that's why it is advised to keep away powerful magnet from these things.

Re : Physics!!


Avinash [10-October-10 3:17PM]
18 posts
profile picture

C) on a linear trajectory in the opposite direction of the train motion

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