Physics - November 2006

2006-11-27 16:51:47 · 8 answers · asked by muffetpaw 1

Comment Critically on the following claims:

(a) an object allways accelerates in the direction of the net force
(b)A lower net force is needed to accelerate an object from rest to 10m/s than is required to accelerate it from rest to 20m/s irrespective of the time take.


Best answer gets 10 Points!!!

2006-11-27 16:43:15 · 6 answers · asked by Brody 3

wat did she work as, and wat were her goals, need for a project

2006-11-27 16:39:59 · 4 answers · asked by Elsa 1

2006-11-27 16:35:02 · 5 answers · asked by mrada6 2

2006-11-27 16:34:53 · 11 answers · asked by faithless 2

I am looking to find out what happens mechanically and chemically when a round (a bullet) is fired from a gun. I would like to draw a diagram, frame by frame, of how it works and be able to explain the chemical reactions for my physical science class. any websites that might have diagrams for me to look at or any answers would be so helpful.

2006-11-27 16:32:20 · 4 answers · asked by Ali 2

2006-11-27 16:26:11 · 6 answers · asked by Anonymous

find the right option
1) highest refraction
2) multiple internal reflections
3) multiple surface reflections
4) hundred percent transmission

2006-11-27 16:02:41 · 6 answers · asked by SUGANTHANA 1

I am struck by the apparent contradiction that a photon or light wave can have enough energy to travel such vast distances and yet have so little energy that it can be interrupted so easily.

2006-11-27 15:44:02 · 8 answers · asked by Wannano 1

In terms of temperature measurement

2006-11-27 15:37:39 · 11 answers · asked by nerd 1

2006-11-27 15:11:18 · 7 answers · asked by taaxi1111 1

2006-11-27 14:50:55 · 5 answers · asked by KutiiTabooty93 1

2006-11-27 14:42:39 · 8 answers · asked by martinezamil 1

An athlete whirls a 7.00-kg hammer 1.8 m from the axis rotation in a horizontal circle. Click picture link below to see the picture. If the hammer makes one resolution in 1.0 s, what is the centripetal acceleration of the hammer? What is the tension in the chain?

*picture link:
http://img88.imageshack.us/my.php?image=scan0003th2.jpg

Please help me with this problem.
I'm having trouble.

2006-11-27 14:37:53 · 1 answers · asked by swimmertommy 1

A rotating rod that is 15.3 cm long is spun with its axis through one end of the rod so that the other end of the rod has a speed of 2000 m/s (4,500 mph).

a. What is the centripetal acceleration of the other end of the rod?

b. If you were to attach a 1.0-g object to the end of the rod, what force would be needed to hold it on the rod?

Please help me with this problem.
I'm having a hard time understanding it.

2006-11-27 14:36:53 · 1 answers · asked by swimmertommy 1

You tell your friend that no machine can possibly put out more energy than is put into it, and your friend states that a nuclear reactor puts out more energy than is put into it. What do you say?

2006-11-27 14:22:41 · 7 answers · asked by Melissa 2

Does using an automobile’s air conditioner while driving increase fuel consumption? What about driving with the lights on? What about playing the car radio when parked with the engine off? Explain in terms of the conservation of energy.

2006-11-27 14:11:11 · 19 answers · asked by Melissa 2

I have questions I need help with and I live 30 miles away from my campus. My school offers online tutoring but its only twice a week. Are there any free sites which offers tutoring for physics and doesn't give viruses or spyware?

2006-11-27 14:02:53 · 2 answers · asked by Sir Guitarist 2

2006-11-27 13:27:10 · 9 answers · asked by taaxi1111 1

2006-11-27 13:10:07 · 3 answers · asked by azmath_rahiman 1

You ordered a 12-inch diameter pizza for a party of 5. To distribute the pizza evenly, how should you cui it?

radius= 6 inch
would degress be 2 pi?
please explain how to do this thanks

2006-11-27 13:07:38 · 2 answers · asked by avalentin911 2

a football player exerts a 42 Newton Horizontal Force as he pulls against a 73 Newton defense player in order to score the winning play. The football player continues down the field at a constant speed. Ignore air resistance.

2006-11-27 12:56:01 · 2 answers · asked by chevy_95_z71_14 1

Speed of sound=340 m/s
Speed of light= 3 x 10^8 m/s

Can you explain how to do this, please?

2006-11-27 12:55:08 · 5 answers · asked by Anonymous

Im doing a project on magnets and i couldnt really find any USEFUL information on why magnets attract. HELP ME PLEASE? it would really help and i would appreciate it =)

2006-11-27 12:36:55 · 5 answers · asked by lalala 2

3. In order to produce the most torque, a force be applied on a lever arm: a. closest to the axis of rotation, b. farthest from the axis of rotation, c. in the middle of the lever arm, d. it doesnt matter where the force is applied

5. Which of the following is not an intrinsic property of an object? a. mass, b. moment of inertia, c. center of mass, d. center of gravity.

6. The dependence of equilibrium on the absence of net torque is: a. the first condition of equilibrium, b. the second conndition of equilibrium, c. rotational equilibrium, d. translational equilibrium.

7. According the Newton's second law, the angular acceleration experienced by an object is directly proportional to which of the following? a. the object's moment of inertia, b. the net applied force, c. the size of the object, d. the mass of the object.

2006-11-27 12:32:24 · 3 answers · asked by Anonymous

I'm taking a driving course and one of my chapters is about driving and laws of nature. One of my questions asks for effects of kinetic energy. Can anyone help?

2006-11-27 12:32:10 · 2 answers · asked by Hopeful_author 1

2006-11-27 12:21:19 · 11 answers · asked by revmccormick 3

In a simple L-R circuit after the circuit has been exposed to a DC power supply for some time a switch is employed to remove it from the power supply to a short circuit. Whats the formula for the power flowing in the inductor in terms of I(t) and R

2006-11-27 12:12:25 · 1 answers · asked by topgun553 1

if i found a way to make this possible what exactly would it do for us?

2006-11-27 12:06:35 · 9 answers · asked by Jordan Alexis 6

True or Rewrite the in parentheses part to make it true.
11.The speed of a rotating object changes only if (torque) is applied to it.
12.The quantity of angular motion that is used with rotating objects is called (linear) momentum.
13.When a (torque) acts on an object, its angular momentum changes.
16.The torque on the planets orbiting the sun is zero because the gravitational force is directed toward the sun and, therefore, is not (perpendicular) to its velocity.
19.When a machine alters mechanical energy, the product of the force and distance is (zero).

Multiple Choice
21.If a net torque is applied to an object, that object will experience which of the following? a. a constant angular speed, b. an angular acceleration, c. a constant moment of inertia, d. an increasing moment of inertia
22.Which of the following quantities measures the ability of a force to rotate or accelerate an object around an axis? a. axis of rotation, b. lever arm, c. moment arm, d. torque

-Thanks

2006-11-27 12:04:55 · 2 answers · asked by marissa c 1