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Answer:

0.451

Explanation:

Answer:

[tex]{\boxed{ \underline{ \sf{Moment \: of \: force}}}}[/tex]

✎ A moment of force is a turning effect caused by a force.

♁ Explanation :

☄ When force is exerted on a body , it results either in displacement of the body or its rotation about a point or axis i.e the rotation of turning effect of force. The turning effect of force acting on a body about an axis is called moment of the force. It may be clockwise or anti - clockwise.

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Answer:

Total time taken t = 2.03 s (Approx)

Explanation:

Given:

Initial speed u = 20 m/s

Height h = 40 m

g = 9.81 m/s²

Find:

Total time taken t

Computation:

v = u + gt

0 = 20 + 9.81(t)

Total time taken t = 2.03 s (Approx)

Answer:

t = 3.8 [s]

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f} =v_{o} -a*t[/tex]

where:

Vf = final velocity = 5 [m/s]

Vo = initial velocity = 13 [m/s]

a = desacceleration = 2.1 [m/s²]

t = time [s]

As we can see in the above equation the acceleration is negative because the car slows down its velocity.

5 = 13 - 2.1*t

2.1*t = 13 - 5

t = (8)/2.1

t = 3.8 [s]

Answer:

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution. A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute.

Explanation:

Answer:

Sonia's grandfather was not able to see clearly after returning from his walk on a bright sunny day. He was about to hit a chair when Sonia held him and guided him to the nearby sofa, in sunny environment grandfather's eye is set according to high brightness, his pupils become small to lower the number of light rays entering his eye, when he returned from sunny environment to his house which was having low brightness so the pupils should enlarge to absorb more light to see clearly but due to old age his Ciliary muscle of the eye would have worn out and due to this poor coordination the image was not clear.

Answer:

In physics we call it power

Answer:

4800

Explanation:

80*60=4800

Answer:

it's true...........

Answer:

83.34%.

Explanation:

Given that,

Lucy does 12,000 J of work on a machine to help her

The machine exerts a force of 500 N to lift the crate.

Height of the shelf = 20 m

We need to find the efficiency of the machine. The ratio of output work to the input work is called the efficiency of any machine. It is given by :

[tex]\eta=\dfrac{W_o}{W_i}\times 100\\\\=\dfrac{500\times 20}{12000}\\\\=83.34\%[/tex]

So, the efficiency of the machine is 83.34%.

Answer:

83%

Explanation:

just took quiz on connections acadmy

Answer:

The pressure of liquid column is given by p=hpg, where h is depth, p is density and g is acceleration due to gravity.

Therefore, pressure of the liquid column increases with depth. The height of the blood column in a human body is more at feet than at the brain. Therefore, the blood pressure in humans is greater at the feet than the brain.

Answer:

the above answer is correct hope it's help you have a great day ☺☺keep smiling be happy stay safe

Answer:

Explanation:

Net work done on the box = increase in kinetic energy

= 1 / 2 x 10 ( 5² - 3² )

= 80 J .

First of all, how long does it take it to fall 0.93m to the floor ?

Distance falling from rest = (1/2) · (g) · (T²)   <== memorize this formula

(0.93 m) = (1/2) (9.8m/s²) (T²)

Divide each side by (4.9 m/s²) :  T² = (0.93/4.9)  =  0.1898 s²

Square root each side:  T to hit the floor = 0.436 second

It got 0.56m away from the desk horizontally in 0.436 sec.

Speed = (distance) / (time)    <=== memorize this formula

Speed = (0.56 m) / (0.436 sec)

Speed = 1.28 m/s

Answer:

i say A : )

Explanation:

Complete Question:

A student has been assigned to measure the density of an irregularly shaped piece of metal.

Which apparatus would be most appropriate to carry out this task?

Group of answer choices

A. ruler, balance

B. beaker, crucible

C. flask, Bunsen burner

D. graduated cylinder, balance

Answer:

D. graduated cylinder, balance

Explanation:

In this scenario, A student has been assigned to measure the density of an irregularly shaped piece of metal.

The apparatus which would be most appropriate to carry out this task is a graduated cylinder and balance.

A graduated cylinder can be defined as a measuring cylinder used for the measurement of the volume of an irregularly shaped piece of metal or liquids. It is typically marked with horizontal lines on its side as units of measurement for volume. The balance is then used to weigh the metals mass.

Answer:

number of Protons=16

number of Neutrons=16

number of electrons=32

Explanation:

Tip:-

Always the number of protons = the number of neutrons.

Add them and you will get the number of electrons.

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Answer:

The earth

Explanation:

Answer:

D. the Earth

Explanation:

The Earth has a solid metal core at the center, which is similar to the pit of a peach. The Earth also has many thick layers of rock and liquid metal between the surface and the center of the Earth, similar to how a peach has a layer of skin and a thick section of fruit. The other answer choices don't have any similarities to a peach. The ocean is entirely liquid, the sun is a ball of gas, and the solar system contains lots of different planets and stars that all are made up of very different things.

Answer:

the mathematical models, Newton's second law, improve the response of our designs and allow us to modify them to be more resistant.

Explanation:

When an object is designed it is done based on some models or guides, specifically Newton's second law is given in the form

            ∑ F = m a

We can make a design and test with forces applied in several different places and with different intensity, to find weak points in the design, this is done a lot today in the construction of tall buildings, in the design of airplanes; The great advantage of this is that it allows you to see problems without significant cost of money and human lives.

There are also designs that can be modified to improve the response of our system to different external stimuli, this is widely used in the design of bridges, to see the response of the structure before load changes and different climatic conditions.

In summary, the mathematical models, Newton's second law, improve the response of our designs and allow us to modify them to be more resistant.

Answer:

6.266829864 g

Explanation:

Answer:

I think it is b because when you do something to an object it moves

Answer:

20.55 miles per hour (rounded to the nearest hundredth)

Explanation:

Divide 104 by 5.06

20.55335968379447

Round to the nearest hundredth

20.55

This can also be 20.6

If you round to the nearest tenth

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Answer:

Its to make sure that the results are reliable.

If you make only one test, the person could have messed up so if there is a twin test, you know something is screwed up in the results so they know the try again and make sure they don't skrew up again.

Explanation:

Answer:

position speed and direction

Explanation:

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Answer:

C ( is hard to refuse in the situation if you have not decided how you would handle it ahead of time

B: because it is very likely you will face these situation in the future)

In terms of attitude change, the fundamental tenet of the cognitive theory would be that individuals are typically driven to lessen dissonance, which could be accomplished by altering their attitudes but also beliefs.

Cognitive theories concentrate on the premise that how exactly what people think causes the arousal of emotions, suggesting that some thoughts, as well as beliefs, as well as beliefs, contribute to healthy emotions as well as adaptive behavior while others lead to disturbing emotions and behaviors.

When people sense unease or guilt as a result of cognitive dissonance, they can actively lessen the dissonance by altering their attitude, beliefs, and even conduct in relation to it in order to attain consistency with both the contradictory cognitions.

In terms of attitude change, the fundamental tenet of the cognitive theory would be that individuals are typically driven to lessen dissonance, which could be accomplished by altering their attitudes but also beliefs.

To know more about attitude change

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Answer:Δx=v0t + 1/2 at 2

Answer:

The correct option is D

Explanation:

Generally, thermal and electrical conductivity is affected by valence electrons in an atom. These valence electrons carry electric charges (or conduct heat as the case may be) throughout the atom. The fewer the valence electrons, the higher its conductivity - this is as a result of free movement within the atom. The higher the valence electrons, the lesser its conductivity and when the outermost electrons have completely filled the outermost shell, the atom would be an insulator as there won't be carriers of electric charges.

Hence, from the above, sodium would be expected to have the highest electrical and  thermal conductivity because it has just one electron in it's outermost shell

Answer:D

Explanation: got it right

Answer:

Explanation:

speed = distance / time

           = 15m / 3sec

           = 5 m/sec

Answer:

5 m/s

Explanation:

The equation for speed is distance/time. The distance, 15, will go over the time, 3. So, we have 15/3.

You can simplify this by dividing both sides by 3. 15/3 is 5. 3/3 is 1. Now we have 5/1, with 5 as meters, 1 and second.

Therefore, the correct answer is 5 m/s.

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