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zlopas [31]
3 years ago
5

True or false? a physical change is a change of matter from one form to another without a change in chemical properties

Physics
1 answer:
Lina20 [59]3 years ago
6 0
The answer is true!!!
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How much work is done lifting a 71 kg dog 2 meters
alexdok [17]
By using the potential energy rule E=mgh=71(10)(2)=1420 note i took the value of gravity 10
A change in potential energy means that there is work
Work=potential energy
Work=1420J
7 0
3 years ago
Which of the following takes place during a synthesis reaction?
11111nata11111 [884]
The answer is C.
A is decomposition, B is Single Replacement, and D is Double Replacement
8 0
3 years ago
Mary slams her breaks and the coffee cup sitting in the dashboard spill everywhere, what Newton law of motion explains why the c
Dimas [21]

Answer:

inertia

Explanation:

a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

aka

it goes on because nothing is resisting it, in this case however, the car is there to stop it, and the result is spilled coffee (rip)

3 0
3 years ago
If you're falling in a forest and there's nobody around, do you ever really crash, or even make a sound?
zalisa [80]

Answer:

yes bc there are branches and twigs surrounding you

Explanation:

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7 0
4 years ago
Read 2 more answers
A dumbbell-shaped object is composed by two equal masses, m, connected by a rod of negligible mass and length r. If I_1 is the m
Paraphin [41]

Answer:

I2>I1

Explanation:

This problem can be solved by using the parallel axis theorem. If the axis of rotation of a rigid body (with moment of inertia I1 at its center of mass) is changed, then, the new moment of inertia is gven by:

I_2=I_{1}+Md^2

where M is the mass of the object and d is the distance of the new axis to the axis of the center of mass.

It is clear that I2 is greater than I1 by the contribution of the term Md^2.

I2>I1

hope this helps!!

8 0
3 years ago
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