Help on energy conservation?

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i need help answering this physics question plz its about work and conservation of energy

a partially filled bag of cement is tossed off of bridge with an initial upward velocity of 3.0 m/s. the bag has a mass of 16 kg and falls 40.0 m to the river below. determine the velocity of the bag just before striking the water. i found that and it...

Answer:

Hi again, pleased to meet you. Solving this question can be done in a single step, or cutting it into...

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Momentum and Conservation of Energy 2D Help?

Show that if a neutron is scattered through 90 degrees in an elastic collision with an initially stationary deuteron, the neutron loses 2/3 of its initial kinetic energy to the deuteron.(mass of neutron=1 atomic mass unit and mass of deuteron=2 atomic...

Answer:

Suppose the neutron is moving towards the positive x-axis and hits a deuteron. After the collison, neutron...

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Help me make true false questions about energy conservation?

i need to think of 3 true and false questions about energy conservation can i get some help here?

Answer:

Its easy & quick to use Google- try key words: energy conservation True false questions Suggest...

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Energy Conservation?HELP NOW?

What role does today's youth play in energy conservation? plz help, ANY answer is acceptable, no matter how stupid it may sound i really need it now...

Answer:

The youth play two roles: 1 - Huge impact on their parents and other family members in purchasing Green...

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Energy conservation? PLZ HELP?

What role does today's youth play in energy conservation? plz help, ANY answer is acceptable, no matter how stupid it may sound i really need it now... this is a SERIOUS ...show more

Answer:

While efficiency ("conservation") is sound in principle, as it's presented today, it is most...

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Physics help - Potential energy and conservation of energy?

A 9.0-kg block is thrown upward from a point 33m above Earth's surface. At what height above Earth's surface will the gravitational potential energy of the Earth-block system have increased by 500 J?

Answer:

m*g*h = 500 + m*g*33 h = 38.66 m

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Some help with the principle of conservation of energy......?

yeah i know what it is. "Energy can be converted from one form to another, but it cannot be created nor destroyed." But what I need to know is, how on earth does it apply to the conversion of electrical energy to heat energy?? Serious answers...

Answer:

Consider electrical energy being transferred through a wire. A perfect wire would be 100% pure and allow...

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Answer:

An 8.70kg block slides with an initial speed of 1.66m/s up a ramp inclined at an angle of 27.4 degrees...

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Answer:

mgh=1/2kx^2, where m is the mass of the arrow, g is the acceleration due to gravity, h is the height...

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HELP PLz!!!! I WANT AN IDEA FOR MODEL-MAKING ON TOPIC-ENERGY CONSERVATION.?

Atcually I am taking part in a model-making competetion and the topic for it is energy conservation. Please give me few suggestions on what I can make for the comptetion.

Answer:

Make a model of a house cut in half. You can either do a house that's energy conservant, with one of...

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