Physics - April 2007

Protons having a kinetic energy of 5.50 MeV are moving in the positive x-direction and enter a magnetic field of 0.0520 T in the z-direction, out of the plane of the page, and extending from x = 0 to x = 1.00 m
Calculate the y-component of the protons' momentum as they leave the magnetic field in kg*m/s

2007-04-30 16:18:29 · 1 answers · asked by Tennis2127 2

A series RLC circuit in a radio receiver is tuned by a variable capacitor, so that it can resonate at frequencies from 500 to 1600 kHz. If the inductance L=1 microH, find the range of capacitances necessary to cover this range of frequencies

2007-04-30 16:14:29 · 3 answers · asked by hpage 3

if i have two objects that aren't static, say, two balls that strike each other that are thrown at each other, what information do i need to measure the amount of force one ball contributes to the impact? What is the measurement system that is used? Sorry i know nothing about physics. i hope i asked this question in a way that you might understand what i mean!

2007-04-30 16:02:49 · 3 answers · asked by Anonymous

Problem 31.41
What value resistor will discharge a 2.70 microFarads capacitor to 20.0 % of its initial charge in 2.10 ms? Answer in ohms

2007-04-30 15:49:29 · 1 answers · asked by MattS 1

Three identical capacitors are connected so that their maximum equivalent capacitance is 15 micro Farads.

(a) Describe how the capacitors are combined.
(b) There are three other ways to combine all three capacitors in a circuit. What are the equivalent capacitances for each arrangement?

2007-04-30 15:49:11 · 1 answers · asked by hpage 3

i have assignment to submit on this monday.
i don't understand what the question is,can anyone help me?

Projectile Motion
You will recall the tutorial problem in which you computed the height of a projectile
that was launched "straight up". In this case the height after t seconds is given by:
2
2
Where uo is the launch velocity in m/s and the gravitational constant g is 9.8 m/s2.
In the simulation of the motion of the projectile the movement is monitored in very
short time intervals .t. In a short time interval the velocity v is almost constant and
the distance the projectile moves can be computed as .s = v .t. The position can then
be updated by s = s + v * .t ;
The velocity changes constantly, it is reduced by the gravitational force. In a short
time interval, .v = -g .t, and the velocity must be updated as v = v – g * .t ;
In the new iteration the new velocity is used to update the distance.
However, most projectiles are not shot upright but at an angle to the horizontal. If the
starting velocity has magnitude v and the starting angle of á, then the velocity is a
vector with components vx = v cos á, vy = v sin á.
In the x-direction the velocity does not change. In the y-direction the gravitational
force has an effect. These equations presume there is no air resistance.
Write a program that will perform the simulation of a projectile that has been
launched with an initial velocity and angle. The user is to enter the initial velocity,
launch angle and the time interval.
The program will present the results in two formats. The user should be able to choose
which format to view.
1. Print the results in a table format on the screen, showing the height (y position)
and range (x position) at each time interval. Use the time interval to update the
position, but print out the position only every full second. Repeat until the
projectile has reached the ground level.
2. Plot the position of the projectile on the screen.
- Use a character display, similar to the sine wave example given earlier.
- The display should plot the x axis of the projectile on the horizontal
plane of the screen and y axis on the vertical plane of the screen.
- Hint: You could store the projectile position in a 2 dimensional array
that can represent the character positions on the screen. The contents of
the array can then be printed to the screen.

2007-04-30 15:42:54 · 1 answers · asked by Anonymous

Physics

2007-04-30 15:41:21 · 4 answers · asked by santista 2

If the same particle, the photon, is responsible for both transporting EM radiation and also carrying magnetic forces, why do magnetic forces travel through opaque objects? Are visibly opaque materials transparent to the magnetic frequency?

Is there any material that is opaque to magnetic force, such that placing a flat board of this material reduces the strength of the force between magnets at a fixed distance? Is there any such material that itself is not affected by magnetic forces?

2007-04-30 15:33:26 · 1 answers · asked by Anonymous

100 m. The maximum speed at which a 2000 kg car can safely negotiate this roadway is

2007-04-30 15:33:15 · 1 answers · asked by Anonymous

The coefficient of kinetic friction is

2007-04-30 15:28:58 · 1 answers · asked by Anonymous

The magnitude of the applied force required to keep the block stationary is

2007-04-30 15:28:08 · 1 answers · asked by Anonymous

The acceleration of the car is

2007-04-30 15:24:07 · 2 answers · asked by sakinah_123 1

Neopia is a strange little planet. Its gravitational acceleration at its surface is exactly 10.0 metres per second per second, and its diameter is exactly 2100 kilometres.

Also, a completely unrelated fact, Skeiths are able to consume about 0.4 kg of pretty much anything they want to eat, every minute, nonstop.

Assuming that the density of the planet is uniform, and that orbiting bodies don't significantly affect the planet's gravity, how many years will it take one million Skeiths to consume one cubic kilometre of Neopia? Please round up to the nearest year.

2007-04-30 15:17:04 · 3 answers · asked by Zac 1

It has been along time and I sold back my David Griffith's Introduction to Electrodynamics, b/c I didn't like the book much as far as problem solving goes... his examples lack to much formality. So, are they any suggestions.

2007-04-30 14:50:20 · 5 answers · asked by Anonymous

The elastic limit of a piece of steel wire is 2.05 109 Pa . What is the maximum speed at which transverse wave pulses can propagate along this wire without exceeding the stress? (The density of steel is 7.86 103 kg/m3.)____________m/s

2007-04-30 14:50:10 · 1 answers · asked by priscilla 1

2007-04-30 13:56:40 · 3 answers · asked by Kevin 1

like does it break it up or something? I know your body is mostly made up of water. I'm not trying to sound like an idiot, lol....i'm just curious like wow.....exactly what does water do? how does it actually keep us surviving?

2007-04-30 13:46:45 · 2 answers · asked by bonto 3

What current is required in the windings of a long solenoid that has 900 turns uniformly distributed over a length of 0.380 m in order to produce a magnetic field of magnitude 1.00 10-4 T at the center of the solenoid? Please put answer in mA.

2007-04-30 13:22:47 · 3 answers · asked by Tennis2127 2

A 6.0 ohm resistor is connected to a 15 V battery.

a. What is the current in the circuit?
b. How much thermal energy is produced in 10.0 minutes?

Please help me with this problem.
I don't understand it.

2007-04-30 13:20:31 · 4 answers · asked by vicky p 1

A .400 kg green bead slides on a curved frictionless wire, starting from rest at point A. At point b the bead collides elastically with a .600 kg blue ball at rest. Find the maximum height the blue ball rises as it moves up the wire.
Point A is 1.50 m above the ground while point b is on the ground. So the bead from point A slides down the wire to point b.

2007-04-30 13:09:09 · 3 answers · asked by rageamos 1

a) 5 kg
b) 10 kg
c) 20 kg
d) 40 kg
e) 50 kg

2007-04-30 13:06:11 · 3 answers · asked by Anonymous

I would be hard pressed to believe even Einstein's theories could be applicable.

2007-04-30 13:01:04 · 8 answers · asked by boo222 1

1. Describe the transfer of energy which enables a person to climb the stairs.

2. How are energy expenditure and potential energy of two different people related at the top of the stairs?

3. What are the most important physical characteristics required for maximum power output?

4. Which three sports/sports event must a person be able to:

a) generate a lot of force
b) do much work
c) develop great power

2007-04-30 12:54:54 · 2 answers · asked by Chess 2

I’m not really sure what to do on it!! So far the materials I have are a popcorn box, bubble rap and packing peanuts. What else could I use and how do I put it together???

2007-04-30 12:53:00 · 1 answers · asked by ♥Poots♥ 2

Two tuning forks are held near each other and a beat frequency of 6 Hz is perceived. if one tuning fork has a frequncy of 512 Hz, what frequencies are possible for the other?

do i just add or subtract the 6 Hz since it's the beat? or what?...

;)

2007-04-30 12:26:40 · 1 answers · asked by hidden_within_a_nightmare 3

2007-04-30 12:15:16 · 3 answers · asked by Anonymous

A plane is flying at Mach 2.3 near sea level where the temperature is 24 degrees celcius. what is the speed in m/s.

my question is what do the Machs mean and how do they tie into the problem???

2007-04-30 11:49:46 · 5 answers · asked by hidden_within_a_nightmare 3

when a mass of 25 g is attached to a certain spring, it makes 20 complete vibrations in 4.0sec. what is the spring constant of the spring?

2007-04-30 11:35:32 · 2 answers · asked by Anonymous

In the Sense that, if One Fully Knows the Current State of Anything, One Can Predict its Next State? What does this Say About the "World Line"? About God?

2007-04-30 11:28:56 · 3 answers · asked by Anonymous

2007-04-30 11:09:40 · 6 answers · asked by Chess 2