Physics - October 2006

2) how much current flows through a circiut if the resistance is 4 ohms and there is a 12-volt battery?
please show formula
3)how much current flows in a 12-watt radio connected to a 120-Volt circuit?
please show formula
4) if you have two 5-watt bulbs connected in a series and then in parallel.
which circuit arrangement will give you brighter bulbs?...i know its parallel can you explain why i dont understand?

2006-10-29 09:50:19 · 3 answers · asked by prjpr29b 1

The combined weight of skateboard and user is 80kilos
The brake pad acts on two wheels which are 30mm x 60mm each.
The board is travelling at a speed on 20mph.
"how much force is required in order to stop the board, and what would the total stopping distance be?
There must be some kind of eqation(s)

2006-10-29 09:33:58 · 12 answers · asked by Anonymous

water is being split to from two new substances, hydrogen and oxygen. Is this a change of state? Explain your answer.

2006-10-29 09:25:38 · 12 answers · asked by :) 2

2006-10-29 09:16:03 · 11 answers · asked by STORMY K 3

1) how much potential energy does the crate have after being lifted?
please show formula
2) if it took 5 seconds to lift the crate using a machine what was the power of the machine?
please show formula

2006-10-29 09:03:49 · 2 answers · asked by prjpr29b 1

2006-10-29 08:07:34 · 4 answers · asked by Steph 4

A skier slides horizontally along the snow for a distance of 27 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.060. Initially, how fast was the skier going?

2006-10-29 07:57:21 · 2 answers · asked by Alan l 1

What would happen if I did this experiment on Earth?
What would happen if I did this experiment on the moon?

2006-10-29 07:54:01 · 7 answers · asked by Ruth 2

A Canada goose floats with 25% of its volume below water. What is the average density of the goose?

i dont know where to start with this.. but its either 75, 175, 200, or 250 kg/m^3

2006-10-29 07:52:37 · 3 answers · asked by Anonymous

May be called Mt Penutobi. Emits more every day than total car emmissions ever!?

2006-10-29 07:32:23 · 8 answers · asked by anne s 1

Im doing some homework and i need to know what length is but i dont remeber, i only remeber how to find length. Please help

2006-10-29 06:57:32 · 4 answers · asked by ShoeLover1036 2

2006-10-29 06:29:29 · 3 answers · asked by mbtafan 3

Whats the difference and similarity between electromagnetic and mechanical waves?

2006-10-29 06:23:50 · 5 answers · asked by Anonymous

guy who answered before will get 10 pts when i can give it

this one seems simple but again i am getting 2.94 m/s^2 while the ANSWER is 2.16 m/s^2

It states calculate the acceleration....It is a 3 kg block on a table attached by pulley to a 2kg block that is hanging off the side of the table. The coefficient of friction is .3

neglect the friction of the pulley

2006-10-29 06:19:19 · 5 answers · asked by Anonymous

as in lighting and such!

2006-10-29 06:13:13 · 9 answers · asked by spanky57 1

Contact of surface?

And How does each affect the coefficient of Kinetic Friction?

Arrangement: Block on a horizontal table is pulled by the hanging mass in vertical position. Acceleration if measured by using the motion of the pulley. Rough and Smooth Surfaces with different surfaces area or small & large contact area are used.

2006-10-29 06:03:35 · 4 answers · asked by Anonymous

if neuteal is return path, how is it safe to touch unless under fault conditions

2006-10-29 05:37:11 · 13 answers · asked by Anonymous

Mg^2+Cl2------> (Mg^2+) +Cl-
Magnesium + Chloride
balance--- 2Mg+Cl2-----> 3MgCl

Li+(OH-) +(K+2)+S^2- -------->(Li+2)(S^2-)+K+OH-
lithium hydroxide + potassium +silicon---->lithium sulfate + potassium hydroxide?
how do you balance?

2006-10-29 05:30:51 · 2 answers · asked by ghettoco 1

a person weighs 540 newtons on th earth. what is the person's mass?what would the person weigh on the moon where the acceleration due to gravity is 1.67 newtons per kilogram?

2) an elevator has a mass of 1000 kilograms
A. what is the tension force on its cables when it is stationary?

B. what force is needed to accelerate it upward at a rate of 2 meters per second per second?

C. what force is needed to accelerate it downward at a rate of 2 meters per second per second?

2006-10-29 05:24:24 · 4 answers · asked by Anonymous

a)HF+Mg------->
hydrogen fluroide + magnesium
water + salt
MgF+H
correct?

b)P+Cl2----> PCl3
Phosophorus + chloride---->phosophorus chloride
how do u balance this?3P+Cl2---->3PCl3

2006-10-29 05:02:30 · 2 answers · asked by ghettoco 1

Two vectors projected on the axes of a coordinates system are called the _______of the resultant vectors.

2006-10-29 04:53:30 · 2 answers · asked by cool 1

2006-10-29 04:48:41 · 12 answers · asked by Pratin S 1

2006-10-29 04:46:19 · 6 answers · asked by Anonymous

2006-10-29 04:34:28 · 5 answers · asked by Live & Let Live! 1

What is its scope?

2006-10-29 04:23:06 · 3 answers · asked by Anonymous

Do springs with large k feel sturdy or flimsy?

2006-10-29 04:11:45 · 2 answers · asked by Anonymous

I know research typically doesn't go the way you want, but how often would you say are you doing experiments where your result is not what you expected or completely different even?

2006-10-29 04:02:37 · 3 answers · asked by abcdefghijk 4

A little girl sits in a car at a traffic light holding a helium filled balloon. The windows are closed and the car is relatively airtight. When the light turns green and the car acclelerates foward, her head pitches backwards but the balloon pitches foward. Explain why

2006-10-29 04:01:33 · 1 answers · asked by Melissa 2

Or will her bouyant force remain the same in greater depths?
Explain Please!

2006-10-29 03:58:45 · 5 answers · asked by Melissa 2

2006-10-29 03:43:42 · 14 answers · asked by ady 4