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3 years ago

3 Pick the best example of Newton's Third law

Physics

2 answers:

d1i1m1o1n [39]3 years ago

4 0

Yeah I agree with A

Rus_ich [418]3 years ago

3 0

Answer: I’m pretty sure the answer is a

Explanation:

His third law states that for every action (force) in nature there is an equal and opposite reaction.

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Represent 8953 ms with Sl units having an appropriate prefix Express your answer to four significant figures and include the app

tatyana61 [14]

Answer:

8.953 s

Explanation:

Here a time of 8953 ms is given.

Some of the prefixes of the SI units are

mili = 10⁻³

micro = 10⁻⁶

nano = 10⁻⁹

kilo = 10³

Mega = 10⁶

Each prefix increases or decreases by a factor of 10³

The number is 8953.0

Here, the only solution where the number of significant figures is mili. If any other prefix is chosen then the significant figures will increase.

$1 milisecond = 1000 second$

$1\ second=\frac{1}{1000}\ milisecond$

$\\\Rightarrow 8953\ milisecond=\frac{8953}{1000}\ second\\ =8.953\ second$

So, 8953 ms = 8.953 s

8 0

3 years ago

When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a wavelength of ________ nm is emitted?

Oduvanchick [21]

First we find the energy level with the following formula, where a is the energy level, n1 is the final energy level, n2 is the starting energy level and r is Rydberg's constant in Joules
$a = r \times ( \frac{1}{n1} - \frac{1}{n2} )$
We insert the values

$a = 2.18 \times {10}^{ - 18} \times ( \frac{1}{ {1}^{2} } - \frac{1}{ {6}^{2} } )$
$= 2.12 \times {10}^{ - 18}$
The wavelength is found with this formula, where h is Planck's constant and c is the speed of light
$wavelength = \frac{h \times c}{a}$
Finally we insert the values
$\frac{6.626 \times {10}^{ - 34} \times 3 \times {10}^{8} }{2.12 \times {10}^{ - 18} } = 9.376 \times {10}^{ - 8}$
Which is the same as 93.8 nm

3 0

3 years ago

A horizontal force is applied to a box with a mass equal to 5.5 kg, The graph shows the net force acting on a box as a function

tangare [24]

From the graph, net work done on the box and the speed of the box when it reaches position x = 8.0 m are 28 Nm and 3.2 m/s respectively

From the question, these are the given parameters;

Mass M = 5.5 Kg

Position X = 0 to X = 8m

Part A

The net work done will be the area under the graph.

From position X = 2m to X = 8m gives us the shape of a trapezium.

A = 1/2( a + b )h

A = 1/2( 2 + 6 ) x 8

A = 8 x 4

A = 32 Nm

From X = 0 to X = 2 gives us the shape of a triangle.

A = 1/2bh

A = 1/2 x 2 x (-4)

A = -4 x 1

A = -4 Nm

Net Work done = 32 - 4

Net work done = 28 Nm

Part B

Applying the concepts of work and energy to solve for the speed of the box when it reaches position x = 8.0 m

Net Work done = 1/2m $V^{2}$

Substitute all the necessary parameters

28 = 1/2 x 5.5 x $V^{2}$

5.5 $V^{2}$ = 56

$V^{2}$ = 56/5.5

$V^{2}$ = 10.18

V = $\sqrt{10.1818}$

V = 3.19 m/s

Therefore, net work done on the box and the speed of the box when it reaches position x = 8.0 m are 28 Nm and 3.2 m/s respectively

Learn more about work done here: brainly.com/question/8119756

4 0

2 years ago

What happens to the force of gravity between two masses if they are moved closer?

Nimfa-mama [501]

Answer:

La piedra empieza a volar

Explanation:

Por la gravedad

7 0

3 years ago

This mathematical model describes the changes that occur in a sample of

True [87]

The correct answer is D. The movement of the molecules will gradually increase.

Explanation:

At the beginning of the model the state of matter of the water is solid, in this, particles have a defined arrangement and are together, which stops particles from moving freely and only allows them to vibrate. However, as the substance is heated the thermal energy (heat) increases in the sample, this causes particles to move more and the arrangement of it changes. Due to this, when the ice melts and there is liquid water particles move more than in solid states, which makes ice lacks a defined shape. Moreover, as the heat continues to increase the thermal and kinetic energy (movement) increases, indeed in gas state (water vapor) particles will move freely. This means the movement or kinetic energy in particles gradually increases in the model.

8 0

3 years ago