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Oliga [24]
3 years ago
13

I will Mark Brainliest 1. ) Allena and Charissa were discussing whether Cl2 is an element or a compound. Allena said that it is

an element because it has only one type of atom. Charissa said that it is a compound because it has more than one atom. Who is correct?
Allena is correct. It is an element because it is only one atom.


Charissa is correct. It is a compound because it has a two.


Charissa is correct. It is a compound because it is made of more than one atom.


Allena is correct. It is an element because it is only made of chlorine atoms.


2.) When a block of steel at 90 degrees Celsius is placed in a bucket of water at 30 degrees Celsius, what happens?


The temperature of the steel decreases and the temperature of the water increases.


The temperature of the steel increases and the temperature of the water increases.


The temperature of the steel decreases and the temperature of the water decreases.


The temperature of the steel increases and the temperature of the water decreases.


3. ) What law states that energy can neither be created nor destroyed, but it is transformed?



Law of Thermal Energy


Law of Thermonuclear Energy


Law of Conservation of Energy


Law of Kinetic Energy
Physics
1 answer:
WITCHER [35]3 years ago
7 0
The answer to question one is A.
The answer to question two is A.
The answer to question three is D.

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The adaptation that is genetic change or mutatiton help makes an organism to survive better in their new environment. 
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Please please help me
Illusion [34]

Answer:

amitude doesnt change

Explanation:

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A particle is moving along the x-axis so that its position at any time t is greater than and equal to 0 is given by x(t)=2te^-t?
erastovalidia [21]
For speed you can differentiate the equation, for acceleration you can again differentiate the equation .
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A 60-kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 3.0 N for a distance of 7.0 m.
Schach [20]

Answer:

Explanation:

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5 0
3 years ago
The initial kinetic energy imparted to a 0.25 kg bullet is 1066 J. The acceleration of gravity is 9.81 m/s 2 . Neglecting air re
lubasha [3.4K]

Answer:

The range of the bullet is 0.435 kilometers.

Explanation:

According to the problem, maximum height is equal to the range of the bullet. That is:

\Delta x = \Delta y

Where:

\Delta x - Range of the bullet, measured in meters.

\Delta y - Maximum height of the bullet, measured in meters.

By the Principle of Energy Conservation, gravitational potential energy reaches its maximum at the expense of the initial kinetic energy. That is to say:

K_{1} = U_{2}

Where:

K_{1} - Kinetic energy at point 1, measured in joules.

U_{1} - Gravitational potential energy at point 2, measured in joules, and:

U_{2} = m\cdot g \cdot \Delta y

Where:

m - Mass of the bullet, measured in kilograms.

g - Gravitational constant, measured in meters per square second.

The maximum height is now cleared:

K_{1} = m\cdot g \cdot \Delta y

\Delta y = \frac{K_{1}}{m\cdot g}

If K_{1} = 1066\,J, m = 0.25\,kg and g = 9.81\,\frac{m}{s^{2}}, the maximum height is now computed:

\Delta y = \frac{1066\,J}{(0.25\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}

\Delta y = 434.791\,m

\Delta y = 0.435\,km

Lastly, the range of the bullet is 0.435 kilometers.

3 0
3 years ago
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