Physics - April 2007

Consider a frictionless slide inside a city park. A 49kg child sits on the top of a slide that is located 1.80m above the ground. After her descent, the child reaches a velocity of 3.00m/s at the bottom of the slide. Find value for % efficiency.

I missed class and so I don't know how to do it. It's probably easy but I missed the lesson. Help please.

2007-04-17 11:27:35 · 3 answers · asked by Anonymous

2007-04-17 11:08:15 · 4 answers · asked by kim_pharaoh7 1

A 2.0 kg, 20-cm-diameter turntable rotates at 100 rpm on frictionless bearings. Two 500 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diagonal, and stick.


What is the turntable's angular velocity, in rpm, just after this event?

2007-04-17 10:32:44 · 1 answers · asked by bman7388 1

2007-04-17 10:32:41 · 4 answers · asked by Leah Baby 1

2007-04-17 08:58:15 · 5 answers · asked by cez 1

In a movie, Tarzan evades his captors by hiding underwater for many minutes while breathing through a long, thin reed. Assuming the maximum pressure difference his lungs can manage and still breathe is -83 mm Hg, calculate the deepest he could have been.

2007-04-17 08:17:36 · 1 answers · asked by ping102_1999 1

please download word document from following link, it contain diagrams. Thanks
http://siel.edu.pk/PhyQuestions.doc

2007-04-17 08:09:14 · 2 answers · asked by medious009 1

Compare the strength of the magnetic field near one pole of a bar magnet with the strength of the magnetic field farther away from the magnet?

2007-04-17 07:58:42 · 1 answers · asked by Anonymous

each?
Co-59
# Protons:?
# Neutrons:?
Co-60
# protons:?
# neutrons:?

(b) What is the number of orbiting electrons in each when the isotopes are electrically neutral?
Co-59
# electrons:?
Co-60
# electrons:?

2007-04-17 07:57:15 · 3 answers · asked by mothsandbutterflies 1

before you can answer this question i have traveled back and deleted it.

2007-04-17 07:48:28 · 7 answers · asked by ixat02 2

I know that the air temperature at 35000ft is between -50 and -70 degrees celcius but what i want to know is that if an object is falling at 200 mph (89.40826m/s), what is the wind chill factor and how cold does that make it.

2007-04-17 07:37:48 · 6 answers · asked by titchytim 1

2007-04-17 07:27:25 · 7 answers · asked by Jamie S 1

Can someone help me with these?

1. Which of the following properties of an object determines its terminal velocity when the object falls toward the Earth?

a. shape
b. weight
c. mass
d. density

2. A 1-kilogram mass is dropped from an altitude of 1,000 meters. If it accelerates at the rate of 10 m/s/s, how fast will it be moving in 5 seconds?

a. 10 m/s
b. 30 m/s
c. 50 m/s
d. 150 m/s

Thanks!

2007-04-17 07:14:45 · 4 answers · asked by JaNaLiEn 2

physics problem

2007-04-17 07:03:42 · 1 answers · asked by mbo5004 1

Are we a bit wishy washy here? Is this science falsey so called? Can Al Gore reverse this dreaded heating or cooling?

2007-04-17 06:57:36 · 3 answers · asked by james h 2

2007-04-17 06:34:02 · 7 answers · asked by Sarah W 2

Is this an example of a pair of forces from Newton's Third Law?

2007-04-17 06:30:25 · 6 answers · asked by Wendy D 1

What is anti-matter and how can i get my hands on it?

2007-04-17 06:25:58 · 3 answers · asked by m_marruffo 1

what are they??,, i hear about them all the time,, like space time, etc,, i am just confused, can someone explain,,

well i knw there are 4 dimentions,, i think,,,but the string theory states that there are up to 11 dimentions,, what does this mean to us??

2007-04-17 06:19:59 · 2 answers · asked by torpedo 1

Precise clock A is fired from a cannon vertically upward.
Another twin clock B remains at rest near the cannon.
After clock A lands, which clock is ahead?

Clocks are insensitive to acclerations.
Air resistance is absent.

2007-04-17 06:02:44 · 5 answers · asked by Alexander 6

A man using a 70kg garden roller on a level surface, exerts a force of 200N at 45 degree to the ground. Find the vertical force of the roller on the ground if a) he pulls it b) pushes it.

2007-04-17 05:41:02 · 2 answers · asked by iqnabeel 1

2007-04-17 05:36:28 · 22 answers · asked by Alexander 6

the kind of light that you get from a lamp

2007-04-17 05:24:05 · 11 answers · asked by Anonymous

Please star if you found this question thought provoking.

2007-04-17 04:33:34 · 8 answers · asked by Anonymous

if absence of light is darkness, that means absence of darkness is light, right? if we accept this then we accept both darkness and light exsist. But doesnt that also mean neither of these things exsist? But if neither of these thing exsist, then it means both these things exsist as well. So how can something both exist and non-exist?

2007-04-17 02:03:24 · 9 answers · asked by Sarp U 1

2007-04-17 01:57:07 · 1 answers · asked by Ice 1

A man using a 70kg garden roller on a level surface, exerts a force of 200N at 45 degree to the ground. Find the vertical force of the roller on the ground if a) he pulls it b) pushes it.

2007-04-17 00:57:16 · 1 answers · asked by iqnabeel 1

I know some of them: Black holes/White holes, Wormholes etc. What are the others?

2007-04-17 00:33:07 · 7 answers · asked by Anonymous

In physics, the conventional units of magnetic field are H (magnetic flux strength) and B (magnetic induction). However they seems not to be abbreviated symbols. I'd like to know what is the terminological roots of these two symbols.

2007-04-16 23:12:07 · 6 answers · asked by spak 1

If ever there was an object big enough with enough gravitational pull could light ever become stuck in its orbit forever?

2007-04-16 22:24:40 · 5 answers · asked by thecoollioness1985 1