How does wheel and axle work ?​

Answer: Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero

Explanation: Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero.

Answer:

13 N to the left

Explanation:

the right side adds up to 1550 13 less than the other side. the box will then be pushed left with 13 newtons of force.

Answer:

0 m/s

Explanation:

In this problem,

A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. We need to find the speed of the ball at the maximum height. When an object reaches its maximum height, after then it starts to decrease its speed. As a result, the speed of the ball will be equal to 0 m/s.

The speed of the ball thrown upwards is zero when the object reaches maximum height.

The given parameter:

The velocity of an object thrown upwards decreases with time because the object is moving against gravity, and the eventually becomes zero when the object reaches maximum height.

[tex]v_f = v_0 - gt= 0[/tex]

Thus, the speed of the ball thrown upwards is zero when the object reaches maximum height.

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Answer:

A

  The distance in revolutions is [tex]n = 7 \ revolutions[/tex]

    The distance in degrees  is  [tex]\theta =2529 ^ o[/tex]

   The distance in radian is  [tex]\theta_{radian } = 44.15 \ rad[/tex]

B

  [tex]\theta_a = 1.26 \ rad[/tex]

Explanation:

From the question we are told that

  The diameter of the pie is  [tex]d = 10.00 \ in[/tex]

  The distance covered by the rim  is  [tex]D = 208 \ in[/tex]

   The number which the pie is divided into  is  k = 5

Generally the radius of the pie is mathematically represented as

      [tex]r = \frac{d}{2}[/tex]

=>  [tex]r = \frac{10}{2}[/tex]

=>  [tex]r = 5 \ in[/tex]

Generally the distance covered by the rim is mathematically represented as

    [tex]D= 2 \pi r n[/tex]

=>  [tex]208 = 2* 3.142 * 5 * n[/tex]

=> [tex]n = 7 \ revolutions[/tex]

Generally converting to  degrees

     [tex]\theta = n * 360[/tex]

=>  [tex]\theta = 7 * 360[/tex]

=>  [tex]\theta =2529 ^ o[/tex]

Generally converting to  radian

   [tex]\theta_{radian } = \frac{\theta * \pi}{180 }[/tex]

=>[tex]\theta_{radian } = \frac{2520 * 3.142 }{180}[/tex]

=>[tex]\theta_{radian } = 44.15 \ rad[/tex]

Generally the angular size of one piece of the pie is  

      [tex]\theta_a = \frac{2 * \pi }{ k}[/tex]

=> [tex]\theta_a = \frac{2 * 3.142}{ 5}[/tex]

=> [tex]\theta_a = 1.26 \ rad[/tex]

(a) The angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.

(b) The angular size of one slice in radians is 2π radian.

The given parameters;

The angular distance traveled by the pie plate is calculated as follows;

2πr = 5.28

[tex]2\pi = \frac{5.28}{r} \\\\2 \pi = \frac{5.28}{5} \\\\2\pi = 1.056 \ rad\\\\\frac{1 \ rev}{2\pi \ rad } \times 1.056 \ rad = 0.168 \ rev[/tex]

[tex]1.056 \ rad \times \frac{360^0}{2\pi \ rad} = \ 60.5^0[/tex]

Thus, the angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.

The circumference of the pie is calculated as follows;

C = 2πr

C = 2π x 5

C = 10π

Diving the pie into 5 equal slice;

[tex]Fraction \ of \ one \ part \ in \ radian= \frac{10\pi}{5} = 2\pi\ radian[/tex]

Thus, the angular size of one slice in radians is 2π radian.

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Answer:

Specific latent heat or specific vaporation vaporization heat

on:

Uses mass only do to no temperature change only state

Answer:

It means...

Explanation:

The mechanical advantage of a machine is 4. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 4 means that for example if you apply 100 N then your machine will multiply that force and generate 400 N.

Answer:

The mechanical advantage of a lever is 4 means that the lever can lift a load which is four times greater than the applied effort.

Hope I helped!

Best regards! :D

~[tex] \text{TheAnimeGirl}[/tex]

Answer:

Explanation:

The kinetic energy of the car can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the Mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 1200 \times {5.5}^{2} \\ = 600 \times 30.25[/tex]

We have the final answer as

Hope this helps you

Answer:

I may be a little late, but it's A i got it right on the exam

Explanation:

All of the following will help you safely cool foods except after a meal put leftovers in a deep container so the food cools down more slowly, therefore the correct answer is option A.

What is thermal energy?

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

The option that will help you safely cool foods is by putting cold foods away immediately after purchasing, Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic, and Transferring cold foods directly from the refrigerator to the cooler when going out.

The right response is A, option a since all of the options will help you safely cool meals, with the exception of putting leftovers in a deep container after a meal to allow them to cool more slowly.

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Answer:

Centripetal force

Explanation:

The force that keeps a bottle moving round and round in circular motion is centripetal force.

Centripetal force is an inward directed force that keeps a body in circular motion. This force keeps a body moving along a circular path.

To find the force, we use the expression below;

     F = [tex]\frac{mv^{2} }{r}[/tex]

F is the centripetal force

m is the mass of the body

v is the velocity

r is the radius

Answer:

15kg

Explanation:

mass = weight / gravitational field strength

mass = 150 / 9.8 = 15kg (nearest whole no)

The mass of the object on earth whose weight is 150 N will be 15.3 Kg

Mass is the amount of matter present inside a body. It is defined as the product of density and volume. It remains constant through out the universe. Mathematically -

M = ρV

where -

M is Mass

ρ is density

V is volume

Given is your weight on earth which is equivalent to 150 N.

We know that the weight of of an object is a force exerted by the earth towards its center. It can be written as -

W = mg

Weight of the object = [W] = 150 N

Acceleration due to gravity on earth = [g] = 9.8 m/s²

Substituting the values -

150 = m x 9.8

m = 150/9.8

m = 15.3 Kg

Therefore, the mass of the object on earth whose weight is 150 N will be 15.3 Kg.

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Answer: All of the above.

Explanation:

Answer:  10 m/s

We're told the speed is constant, so it's not changing throughout the time period given to us. So throughout the entire interval, the speed is 10 m/s.

Answer:

250 Joules

Explanation:

The formula is KE = 1/2m*v^2

Answer:

This is what I got the teacher hasn’t graded it yet so sorry if it’s not right

Explanation:

Answer: A.

Explanation:

took the test just now

A battery supplies electrical energy to a circuit Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals. The correct option is A.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals resulting in the transformation into electrical energy therefore the correct option is A.

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Answer:

 fr ’= ½ F

Explanation:

For this exercise we use the translational equilibrium equation, on the axis parallel to the wall

              fr - W = 0

              fr = W

for the adult man they indicate that the friction force is equal to F

              F = M g

we write the equilibrium equation for the child

             fr ’= w’

             fr ’= m g

in the statement they tell us that the mass of the adult is 2 times the mass of the child

             M = 2m

we substitute

            fr ’= M / 2 g

            fr ’= ½ Mg

we substitute

            fr ’= ½ F

therefore the force of friction in the child is half of the friction in the adult

Answer:

Try copy and pasting the intructions it into google, and it should pop up if it exists.

Hope this helps.

Explanation:

Answer:

Send me the download of the lab and I will complete it for you

The water exerts a net drag force on the boat, and tends to make the boat move along with the average water flow, or stay put if the water isn't going anywhere. The water will heat up slightly as energy from the big motion ...

Answer:

If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.

Explanation:

Answer:

C. Density

Explanation:

Answer:

The boat's acceleration is 4 m/s²

Explanation:

This question seeks to test the knowledge of acceleration and how to calculate acceleration when the speed is provided. Hence, the formula for acceleration would be used here.

Acceleration (m/s²) = speed (in m/s) ÷ time (in seconds)

Acceleration = 80 m/s ÷ 20 secs

Acceleration = 4 m/s² or 4 ms⁻²

The boat's acceleration is 4 m/s²

Answer: lens is thicker at the central egde

Explanation:

Answer:The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:

Chemistry, physics, astronomy and earth science.

Explanation:

The four main categories of physical sciences are chemistry, physics and earth science and astronomy. Life sciences deal with living organisms and behavioral sciences deals with the interactions between organisms in the natural world.

C is your answer. PH is an acidic trait used to define just how acidic an acid is. Since you are classifying an acid it would go in C with PH.

Answer:

Elephant

Explanation:

has a larger mass which equates to greater momentum

Answer:

meter

The SI unit of distance and displacement is the meter [m].

Explanation:

have advancedd

Answer:

meter

Explanation:

it is meter I hope this is helpful

Answer:

deez nouts

Explanation: