A block of mass m is pushed against a spring that has a spring constant k. The spring is compressed by a distance d, and then the block is released. We observe that the block is launched by the spring along a horizontal frictionless surface with a final speed v.

If a second block, this one having a mass of 4m, is pushed against the spring and released, we observe that it gains a final speed of 2v. By what distance was the spring compressed in this second case?

2d
25d
16d
d
4d

(basically which factor does it go up by)... if someone could explain this to me as opposed to just giving me the answer it would be greatly appreciated.. thanks again

2006-10-18 12:20:43 · 3 answers · asked by stylesofbeyond40 1 in Physics

2 ⤊

How come my car frosts over when it is outside, and not when it is inside my freezing garage?

2006-10-18 12:19:56 · 7 answers · asked by number 1 2 in Other - Science

1 ⤊

Rotational Inertia of a centrifuge?

A centrifuge has a rotational inertia of 6.66 X10^ -3 kg·m^2. How much energy must be supplied to bring it from rest to 458 rad/s?

2006-10-18 12:19:52 · 1 answers · asked by nt 2 in Physics

2 ⤊

If I stored food in a vacuum container would it keep my food fresh forever?

If I wanted to store up supplies for a natural disaster, could I put any kind of food in a sealed, air-tight container, draw out all the air, and store it indefinately; thus keeping my food from spoiling?

Why or why not?

2006-10-18 12:16:32 · 9 answers · asked by davidgarciadrg 1 in Biology

0 ⤊

just a question?

Do aoholic get drunk easily? cause i have this idea thst they become immune to it

2006-10-18 12:15:15 · 3 answers · asked by Anonymous in Biology

1 ⤊

Does the world go round, or spin round?

2006-10-18 12:11:38 · 18 answers · asked by Monica K 2 in Earth Sciences & Geology

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waves help?

ok, in a storm, lightning is often seen a considerable time b4 the thunder is heard:
1) if the lightning is seen 8 sec b4 the thunder is heard, calculate the distance of the thunder cloud from the observer.
2) what assumption have you made in your calculation? arigatou

2006-10-18 12:09:02 · 1 answers · asked by audaciously_shy 2 in Physics

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What are the main reasons why a service provider may use unlicensed spectrum?

2006-10-18 12:06:28 · 1 answers · asked by The Dude 3 in Engineering

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What are the main two reasons for the wireless industry’s major efforts around 3G?

2006-10-18 12:05:24 · 1 answers · asked by The Dude 3 in Engineering

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Bright line spectrum question (fireworks)?

100s of years before scientest even dreamed of the existence of atoms, the chinese use the composite colors of the bright line spectrum of different atoms when making firework. can someone give me a specific exampele of how they produced different colors in fireworks?

2006-10-18 12:04:19 · 5 answers · asked by Lisa 1 in Chemistry

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What are the main disadvantages of a wireless system using unlicensed spectrum?

2006-10-18 12:04:19 · 4 answers · asked by The Dude 3 in Engineering

0 ⤊

cansomeone please help me..ill u best answer...plisss?

can someone explain to me how to add integers like -5-(-9) and stuff like that..its that today i had a test and i failed miserably ..i simply dont get it....and im in a algebra 1 class...i simply dont kno how to add,subtract ,divide or multiply integers,....help plissss

2006-10-18 12:03:44 · 4 answers · asked by Anonymous in Mathematics

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