PHYSICS MIDDLE SCHOOL

Make a the subject of the formula s=ut + 1/2at^2

Answers

Answer 1

Answer:

Answer:

a=2(s-ut)/t^2

Explanation:

s=total distance

u=initial speed

t=time

a=acceleration

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What is the frequency of light with a wavelength of 6.33x10^-7m

Answers

Answer:

$4.74\cdot 10^(14)Hz$

Explanation:

The frequency of an electromagnetic wave is given by

$f=(c)/(\lambda)$

where

$c=3.0\cdot 10^8 m/s$ is the speed of light

$\lambda$ is the wavelength

For the light wave in this problem, the wavelength is

$\lambda=6.33\cdot 10^(-7)m$

So by using the equation above, we find its frequency:

$f=(3\cdot 10^8 m/s)/(6.33\cdot 10^(-7) m)=4.74\cdot 10^(14)Hz$

Final answer:

The frequency of light can be found by using the formula f = c ÷ λ, where c is the speed of light and λ is the wavelength. By substituting these values into the formula, you can calculate the frequency of light with a given wavelength.

Explanation:

When you are given the wavelength of light and asked to find its frequency, you would use the formula c = fλ, where c is the speed of light (3.00 x 10⁸ m/s in vacuum), f is the frequency, and λ is the wavelength. To find the frequency, we rearrange this formula to get f = c ÷ λ. Given the wavelength λ = 6.33 x 10^-7 m, we can substitute these values into the rearranged formula to find the frequency:

f = (3.00 x 10⁸ m/s) ÷ (6.33 x 10^-7 m)

By calculating the above equation, you will find the frequency of the light with the given wavelength.

Learn more about Frequency of Light here:

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the difference between speed and velocity is that A) speed is a vector and requires a direction. B) speed is a vector and requires a magnitude. C) velocity is a vector and requires a direction. Eliminate D) velocity is a vector and requires a magnitude.

Answers

The correct answer is C. Velocity is a vector and requires a direction.

Explanation:

In physics both speed and velocity are used to study the motion of a body; however, they are slightly different. In the case of speed, this describes the rate of change in position based on distance and time, because of this, speed is based on a magnitude or quantity. On the other hand, velocity is a vector because it does not only includes a change of position but the direction of motion usually based on a specific location reference.

Considering this, it can be concluded the difference between speed and velocity is that "velocity is a vector and requires a direction" because velocity includes both the distance and time (speed) along with the direction while speed focuses only on time and distance.

The difference between speed and velocity is that C) velocity is a vector and requires a direction

Further explanation

Vector is a quantity that has a value and direction

Vector can be symbolized in the form of directed line segments

$\large {\boxed {\bold {\overrightarrow{A}}}$

while the length of the vector is denoted by | a |

Vectors can be written in the form of sequential pairs which shows their coordinates in the Cartesian plane: a (a₁, a₂)

with length

$\large {\boxed {\bold {|a|=√(a_1^2+a_2^2) }}$

If the direction of the vector is reversed, we get the vector -a which has the same length but in the opposite direction

Operations on vectors include addition and subtraction. Addition of vector a and vector b can be done in a triangular way where the base point of vector b coincides with the endpoint of vector a

The sum of the two is obtained by pulling the line segment from the base point of the vector a to the endpoint of the vector b which results in a new vector c

So a + b = c

If vector a is added by inverse b (-b) then the sum becomes a + (- b) = a-b

If a vector is multiplied by a scalar number (eg denoted by k) then the new vector becomes k | a |.

If k> 0, the new vector is in the direction of vector a, but if k <0 it will be in the opposite direction

A vector has a direction and a magnitude, while a scalar has only a magnitude.

Examples of scalars are: length, mass, time, speed

Examples of vectors are: force, acceleration, velocity

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If a star's parallax angle is too small to measure, what can you conclude about the star's distance from the Earth?

Answers

Answer:

The star is too distant to be measured by parallax method. This happens when parallax angle is of the order of the least count of measuring system or less than that.

Explanation:

1. Initial velocity 5m/s, finalvelocity 36km/hr,
acceleration 1.25m/s/s.
Distance?

Answers

Answer:

31.25m

Explanation:

Check attachment

Answer:

1.25ml

Explanation:

multioply

Determine the quantity of work done when a crane lifts a 100-N block from 2 m above the ground to 6 m above the ground. A.
100 J

B.
200 J

C.
400 J

D.
600 J

Answers

Answer:

C. 400 J

Explanation:

In physics, work is defined as

$W=F * \Delta d$

Where $W$ is the word done, $F$ is the force that move the object and $\Delta d$ is the change of the position of the object.

In this case, we have

$F= 100 \ N$

$\Delta d= 6m - 2m = 4m$ , remember that the difference refers to the actual subtraction between the final point and the initial point of the object.

Replacing these values, we have

$W= 100 \ N * 4m\nW=400 \ Joules$

Therefore, the right answer is C. The work done is 400 Joules

Answer:

400 J

Explanation:

I just took the test and can confirm this.

What does aliens need to survive on Jupiter?

Answers

If you only asked me what does an animal need to survive in my house,
I couldn't answer that one either, until you tell me what animal you're
talking about.

Now you want to talk about aliens, of which #1): We have no evidence
that they even exist, and #2): If they do exist,we have no idea what kind
of a planet they live on, and #3): We have no idea what the environment
might be like on that planet.

So, to answer your question, I would say this:

In order to survive on Jupiter, an alien species would need exactly the
same things that Earthly humans would need there ... They would need
some set of materials and devices that could be used to duplicate the
conditions of atmosphere, temperature, pressure, gravitation, and
radiation in which their species evolved and to which it adapted, in
whatever place they came from.

I dont believe that there is aliens so they need nothing to survive because they arent real. But that is my opinion. Scientist say they are but in my belief i think they just saying that to get known.

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