Physics - July 2007

2007-07-26 16:15:47 · 11 answers · asked by Mercury 2010 7

A block whose weight is 41.6 N rests on a horizontal table. A horizontal force of 33.3 N is applied to the block. The coefficients of static and kinetic friction are 0.699 and 0.352, respectively. Will the block move under the influence of the force, and, if so, what will be the block's acceleration? If the block does not move, give 0 m/s2 as the acceleration.

2007-07-26 16:07:54 · 4 answers · asked by Anonymous

can a capacitor voltage be higher than the source's voltage? how? What about Kirchhoff's loop rule?

2007-07-26 15:56:04 · 8 answers · asked by Anonymous

2) Two electrons in an atom are separated by 1.6 x 10 ^-10 m, the typical size of an atom. The coulomb constant is 9 x 10^9 N *m^2/C^2. What is the force between them? Answer in units of N.

I tried using coloumbs law but not sure

2007-07-26 15:51:38 · 2 answers · asked by Anonymous

if the resistance of the bulb is so high it means a tiny current flows in to it , then how does the bulb glow with such a tiny current?

2007-07-26 15:07:14 · 8 answers · asked by sarita s 1

The electron gun in a television tube is used to accelerate electrons( mass of 9.10939x 10^-31 kg and charge of -1.60218X10^-19 C) from rest to 2 X 10^7 m/s within a distance of 5.5 cm. What is the electric field require? Answer in units of N/C.


I got 2.2 x10-13 but im not sure if I did it right can someone check me please

2007-07-26 15:06:53 · 1 answers · asked by Anonymous

The electron gun in a television tube is used to accelerate electrons( mass of 9.10939x 10^-31 kg and charge of -1.60218X10^-19 C) from rest to 2 X 10^7 m/s within a distance of 5.5 cm. What is the electric field require? Answer in units of N/C.

2007-07-26 13:48:59 · 3 answers · asked by Anonymous

(y=1.67)The pressure of the gas is 3.5 x10fifth Pa. The total mass of gas is 2.3kg.

2007-07-26 13:31:36 · 2 answers · asked by Anonymous

calculate net torque on a beam about a following axes
both counterclockwise
O: at 45degrees and 35 N
C: at 30 degrees and 25N
both at r= 2.0 m

2007-07-26 13:31:08 · 1 answers · asked by ghoulina 1

A certain lightbulb has a tungsten filament with a resistance of 21.0 when cold and 135 when hot. Assume that Equation 17.8 can be used over the large temperature range involved here, and find the temperature of the filament when it is hot. Assume an initial temperature of 20°C.

2007-07-26 13:28:24 · 4 answers · asked by makk 3

An electric car is designed to run off a bank of 12.0 V batteries with a total energy storage of 2.00 x 10^7 J.
-->If the electric motor draws 8.00 kW, what is the current delivered to the motor? in A
--> If the electric motor draws 8.00 kW as the car moves at a steady speed of 20.0 m/s, how far will the car travel before it is "out of juice"? in km

2007-07-26 13:07:12 · 1 answers · asked by makk 3

The guy saves a ship from blowing up so he would never mee tthe people who sent him back? So that means he never went back so how is he there!? Weird

2007-07-26 13:06:30 · 4 answers · asked by Rancidbearsgrease 4

2007-07-26 12:59:29 · 18 answers · asked by fathin comey 1

This question is for any mathematician who is some what like Einstein in skill. So mathematicians were you natural at math more than the average person. Or did you practice every day to be great at math like Einstein. Also if a average person is really enthusiastic about learning math then would you say that they could be as you are in the mathematics department. Thank you for any good answers that you may give.

2007-07-26 12:42:09 · 3 answers · asked by Q guy 4

when all wave lengths of light are present and there are no gaps from extreme red to extreme violet, this is called?

2007-07-26 12:37:42 · 3 answers · asked by M 3

The common definition (e.g.: Wikipedia) is that: mech eq is achieved when net force and net torque on EACH PARTICLE of the system is zero. My question is: why is a ball spinning at constant angular velocity and zero translational motion at mech eq?

At first it makes sense, since translation velocity and angular velocity are both constant (hence net force and torque are zero). But the definition says that EVERY PARTICLE of the system must have zero translational and angular acceleration. If we consider the particles off the centre of the ball, they are actually accelerating centripetally as the ball spins, even though their speed is constant; these particles are therefore not in equilibium. So why do we still say that the ball itself is at equilibrium?

Is the issue here just a case of simplifying the ball into a single indivisible body?

2007-07-26 12:30:51 · 5 answers · asked by Anonymous

2007-07-26 11:44:08 · 20 answers · asked by jasper 3

2007-07-26 11:36:32 · 12 answers · asked by raycreed14 1

2007-07-26 11:24:34 · 2 answers · asked by Anonymous

2007-07-26 11:16:35 · 1 answers · asked by Anonymous

What are you opinions on John Titor?
When the John Titor "timetravel" situation arose several years ago, why didn't the owner/webmaster of the sites that he posted on trace his IP address to see where he was posting from?

2007-07-26 11:11:18 · 2 answers · asked by cardinalfanusa 3

this theory had been rejected from many scientists, but my opinion is that there is some kind of possibility, but i would have a more specific answer, if i completed the advance physics, because i'm still learning the tip of the Ice Berg physics,and once again NO FORMULAS

2007-07-26 11:07:00 · 3 answers · asked by Anonymous

determine
a) time taken by projectile to hit a point C at ground level
b) the range X of projectile as measured from the base of the cliff
c) At the instant just before the projectile hits the point C, find the horizontal and vertical components of its velocity
d) Find its final velocity ( magnitude and direction)

2007-07-26 10:55:42 · 2 answers · asked by Anonymous

Could it be that just as everything we know is made up of atoms, that the nucleus of an atom, could be made up of even tinier particles which are to it, as atoms are to us?
And so ad infinitum.

2007-07-26 10:29:52 · 10 answers · asked by Sprinkle 5

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 8.0 km/s and the secondary, or S, wave has a speed of about 4.5 km/s. A seismograph, located some distance away, records the arrival of the P wave and then, 110 s later, records the arrival of the S wave. Assuming that the waves travel in a straight line, how far (in terms of m) is the seismograph from the earthquake?

2007-07-26 09:38:02 · 3 answers · asked by Pinkjenna 1

Could the electricity go up the stream and shock the individual? Electro shock therepee?

2007-07-26 08:56:19 · 27 answers · asked by SM B 2

why do I get a better hit off my bong when I put ice in the water?

2007-07-26 08:55:01 · 3 answers · asked by jerryalanjr 1

Like if turned on my light switch what speed does travel or how quick am I sending this across th Atlantic?

2007-07-26 08:54:52 · 12 answers · asked by Anonymous

not clocks for the funnies

2007-07-26 08:54:13 · 12 answers · asked by Anonymous

2007-07-26 08:14:53 · 7 answers · asked by yogi 1