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Illusion [34]
3 years ago
5

What is the timeline for the law of conservation of energy

Physics
1 answer:
kirill [66]3 years ago
4 0
In 1842, Julius Robert Mayer discovered The law of conservation of Energy. It its most compact form, it it  now called The first law of Thermodynamics

Energy can neither be created nor destroyed, it can only be changed to another form of energy.
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Object A is placed on top of object B. Object A is the same temperature as object B. How will heat flow between object A and obj
mash [69]
"No heat will flow between object A and object B" is the one among the following choices given in the question that describes how heat will <span>flow between object A and object B. The correct option among all the options that are given in the question is the second option or option "B". I hope it helps you.</span>
6 0
2 years ago
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Sarah throws a ball directly upward at the edge of a cliff with a starting velocity of 3.0 m/s
strojnjashka [21]

Answer:

The correct answer is t = 0.92s

Explanation:

Initial velocity v​0 = 3.0 m/s

Displacement Δy = ?

Acceleration a = -9.8m/s2

Final velocity v = -6.0m/s

Time t=? Target unknown

We can use the kinematic formula missing Δy to solve for the target unknown t:

V=v0+at

We can rearrange the equation to solve to t:

V-v0=at

t= v-v0/a

Substituting the known value into the kinematic formula gives:

t= (-6.0m/s)-(3.0m/s)

————————————

-9.8m/s2

= -9m/s

—————-

-9.8m/s2

=0.92s

6 0
3 years ago
Which of these statements is true?
snow_lady [41]
B). Some elements found in nature exist as molecules. 
That is, their atoms travel around in bound pairs. 
Examples are Hydrogen, Oxygen, and Nitrogen.

A). No.  Without atoms, you can't make a molecule.

C). No.  A compound is a chemical combination of two or more elements.

D). No.  An atom is the smallest unit of ONE single element.
7 0
3 years ago
Read 2 more answers
During a circus act, an elderly performer thrills the crowd by catching a cannon ball shot at him. The cannon ball has a mass of
Phantasy [73]

Answer:

2.4681 m/s

Explanation:

m_1 = Mass of cannon ball = 29 kg

m_2 = Mass of performer = 65 kg

u_1 = Initial Velocity of cannon ball = 8 m/s

u_2 = Initial Velocity of performer = 0 m/s

v = Velocity of combined mass

As the linear momentum of the system conserved

m_1u_1 + m_2u_2 =(m_1 + m_2)v\\\Rightarrow v=\frac{m_1u_1 + m_2u_2}{m_1 + m_2}\\\Rightarrow v=\frac{29\times 8 + 65\times 0}{29 + 65}\\\Rightarrow v=2.4681\ m/s

The recoil velocity is 2.4681 m/s

3 0
3 years ago
A pulse is sent down a rope that is tied to a wall.
muminat
The answer will be B
8 0
3 years ago
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