There is also one question describe the difference between velocity and a acceleration

Answer:

Negative 3

Explanation:

Bc scientific notation is the zeros either ahead or behind the actual numbers

Answer:

-3

Explanation:

The difference between a physical change and a chemical change is composition. In a chemical reaction, there is a change in the composition of the substance. In a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Hope This Helps, Good Luck!

Answer:

v=20

Explanation:

v=u + at

v=0 + 5×4

v=20

Answer: b

Explanation:

It is based on an observation of a natural phenomenon can be answered by a scientific investigation. Thus option B is correct.

Scientific investigation can be defined as a continuous process involving different steps to find out the answer to a specific scientific question by using scientific method.

The basic steps includes observation, which can be further used to develop, design of experiment and improve a hypothesis and an explanation based on an observed phenomenon.

There are different steps involved  in Scientific Investigation such as

• Observation is the first step of the scientific investigation to observe the process involve in  the step of inspection and conduction of  the investigation by asking questions.

• Asking Questions is purely based on observation and it make sure that every detail is already known and a query existing can be solved quickly.

• making of a Hypothesis involves proper explanation of  the query and it is most important part of the scientific investigation, it can come from a phenomenon.

• conclusion involves to the information drawn out, follow a proper scientific or a mathematical statement followed by Communication of the information from the investigation

Thus option B is correct.

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Answer: dashed

Explanation:

Answer:

Dotted

Explanation:

a double yellow is no pass

a dotted o one side may pass

nit sure about the just dotted tho

Answer:

2.30×10³

10.3

Explanation:

The rules for significant digits are:

To write 2300.2 in three significant figures, you'll have to write it in scientific notation.

2.30×10³

To write 10.26730 in three significant figures, simply round to the tenths place.

10.3

Answer:

yes kinetic energy will be affected it will get increased 16 times.

Explanation:

Answer: 1. 33, 2. 264

Explanation: 66m= 6s so, to find the position at 3s you just need to take 66/2 = 33m cause 3 is half of 6. & for 2 you will take 66x4= 264m cause it took 4s multiply by the original 6s to get 24s. Answer: 1 is 33m and 2 is 264m

Answer:

Explanation:

we know that

s=vt

given

v=5.4 m/s

t=12 s

s=5.4 m/s*12 s=64.8m

Answer:

14.25 m

1.5 s

Explanation:

Given:

y₀ = 3 m

v₀ = 15 m/s

v = 0 m/s

a = -10 m/s²

Find: y and t

v² = v₀² + 2aΔy

(0 m/s)² = (15 m/s)² + 2 (-10 m/s²) (y − 3 m)

y = 14.25 m

v = at + v₀

0 m/s = (-10 m/s²) t + 15 m/s

t = 1.5 s

The maximum height reached by rocket is 14.48m

The time the rocket will reach its maximum height is 1.53 secs

To get the maximum height, we will use the equation of motion. Using the equation of motion;

[tex]v^2=u^2-2g(\triangle s)[/tex]

where:

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

[tex]\triangle s[/tex] is the change in height

The equation can also be written as [tex]v^2=u^2-2g(s_2-s_1)[/tex]

Substituting the given parameters into the formula:

[tex]0^2=15^2-2(9.8)(s_2-3)\\0 = 225 - 19.6s_2+58.8\\19.6s_2=283.8\\s_2=\frac{283.8}{19.6}\\s_2= 14.48m[/tex]

Hence the maximum height reached by rocket is 14.48m

Get the required time this will occur.

[tex]v=u-gt\\0=15-9.8t\\9.8t=15\\t=\frac{15}{9.8}\\t= 1.53secs\\[/tex]

Hence the time the rocket will reach its maximum height is 1.53 secs

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Answer:

jus did this, the answer is A, -0.8 m/s^2 :)

Explanation:

Answer:

Deoxyribonucleic acid

Explanation:

Answer:

Deoxyribonucleic acid

Explanation: Hopes that helps

Answer:

3 seconds is the average speed between 1 and 5

Answer:

The tennis ball.

Explanation:

Because the baseball is heavier, it requires more force to move it, whereas the tennis ball requires less force, so it will move more. Hope that makes sense!

If we apply the same amount of force to a 0.1-kilogram baseball and a 0.05-kilogram tennis ball, then the 0.05-kilogram tennis ball will accelerate more because the force is the product of the mass and acceleration.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem statement If you apply the same amount of force to a 0.1-kilogram baseball and a 0.05-kilogram tennis ball,

force on any object = acceleration × mass of the object

As given the same amount of force is applied to both the objects then the object having less mass would experience a greater amount of acceleration.

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Given :

Vector A has a magnitude of 63 units and points west, while vector B has the same magnitude and points due south.

To Find :

The magnitude and direction of

a) A + B .

b) A - B.

Solution :

Let , direction in north is given by +j and east is given by +i .

So , [tex]A=-63i[/tex] and [tex]B=63j[/tex]

Now , A + B is given by :

[tex]A+B=-63i+63j[/tex]

[tex]| A+B | = 63\sqrt{2}[/tex]

Direction of A+B is 45° north of west .

Also , for A-B :

[tex]A-B=-63i-63j[/tex]

[tex]|A-B|=63\sqrt{2}[/tex]

Direction of A-B is 45° south of west .

( When two vector of same magnitude which are perpendicular to each other are added or subtracted the resultant is always 45° from each of them)

Hence , this is the required solution .

Answer:

True

Explanation:

It can help relax your brain

Answer:

Explanation:

If a force of 20N is situated at 30° south west, the x and y component of the vector will be expressed as:

Fx = -Fcos 30° and Fy = -Fsin30°

They are but negative because the force acts in the third quadrant of a four cardinal point

Fx = -20cos30°

Fx = -20(√3/2)

Fx = -10√3N

Hence the -x component if the force is -10√3N

Fy = -20sin30°

Fy = -20(1/2)

Fy = -10N

Hence the y-component is the vector is -10N

Answer:

x=37/20 i think not so sure tho

Answer:

This depends on the type of the thermometer, but when working with glass thermometers, (Hg especially) you should not put them near the edge of the table.

This is because it will easier to accidentally touch it and throw it into the ground, breaking the thermometer.

This is bad not only for the material loss of the lab instrument, but also because the mercury inside the thermometer is dangerous, so you really want to keep the thermometers in a safe place.

Then this would be false, do not leave the thermometers near the edge of the table (or in any place where it can fall and break)

Answer:264m

Explanation: 12 x 22= 264m

Answer:

0.667 m/s^2

Explanation: Given that you slow down from 2m/s to a stop 3s.

Using first law of motion.

V = U - at

Where

Final velocity V = 0

Initial velocity U = 2 m/s

Time taken t = 3 seconds

Since the body slow down, the final velocity V will be equal to zero. And the acceleration will be negative.

Substitute all the parameters into the formula

0 = 2 - a × 3

3a = 2

a = 2 /3

a = 0.667 m/s^2

Therefore, your acceleration during this time interval will be 0.667 m/s^2

Answer:

The answer is shape.

Explanation: It says physical so it means the physical shape taking some of the salt would not change the density solubility or the Thermal conductivity

Explanation:

If the forces are not balanced on an object, the object experiences an overall net force. This will change the object's velocity.

Answer:

D

Explanation:

prism is able to do all.

Prism can do all of the three function mentioned in the choices.

A prism is used to change the path of light by reflection and both refraction , rotate the image  and disperse the light into its component. Prism is used for both reflection as well as refraction of light. There are some prism which can be used for image rotation is called image Rotation Prisms.

These types of prism are used to rotate, invert, or revert an image. Image Rotation Prisms are extensively used in microscopes, telescopes, rifle scopes,  microscope, astronomy and also in defense industries. It is also used to disperse the light into different colour so we can conclude that prism can do all of the three function mentioned in the choices.

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Answer:This would be B

Explanation:

Answer:

False

Explanation:

Answer:

29.5 days

Explanation:

It is a cycle that lasts nearly 29.5 days.

Answer:

28 days

Explanation:

The cycle is 28 days long.

Answer: hair

Explanation: Since a persons hair can be tracked back to their DNA this was often used because most of the criminals were female and all female have extremely long hair. Hair is also easy to find at a crime scene because the k9 dogs can easily smell it.

Answer:

The answer to this question would be fingerprints.

Explanation:

In the late 1800's Chinese organized a fingerprinting system and started using it to track down criminals

Answer:

Therefore, when a light ray traveling through air enters water or glass it slows down, refracts, and bends toward the normal line. ... For example, when light goes from glass or water to air, it speeds up. Refraction changes how objects look.

Explanation:

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.

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