A student planted bean seeds in two cups and placed the cups on a sunny windowsill. One cup was given 10 mL of water and the other cup was given no water. What are two things that should be kept constant in this experiment?

Explanation:

It is given that there is distance time graph. The slope of any distance time graph will give the speed or velocity of the object.

In the context, it is seen that there is a point in the distance - time graph. And the values of the point in the graph is (4,15).

Now here, the distance is plotted in the  ordinate or the vertical y-axis while time is plotted in the abscissa or the horizontal x-axis.

Thus the point (4,15) tells us that the object has traveled 15 units in time equal to 4 seconds.

Answer:

Negative 3

Explanation:

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

Answer:

-3

Explanation:

Answer:This would be B

Explanation:

Answer:

False

Explanation:

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

You must run at least 53.3333333 meters a minute.

Answer:

Explanation:

If the mass of an object is 5 kg, it means that it weighs 5 kg

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Answer:

An initial velocity that is faster than a final velocity.

Explanation:

The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity

A negative acceleration is rate of change of velocity in the negative direction ( i.e decrease in velocity with time ). A negative acceleration is also known as dacceleration. To achieve a negative acceleration the final velocity has to be less than the initial velocity.

Hence we can conclude that The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity.

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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.

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Answer:

It will take 3.7 seconds for the football to travel 50 meters.

Explanation:

Since the football is traveling at 13.5 meters per second, we need to divide the distance needed to travel by how fast it is moving,

50/13.5 = 3.7 seconds

Answer:

True

Explanation:

It can help relax your brain

Answer:

22

Explanation:

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:

1. 5 meters per second 1 meter per second

2. 5 m/ minute 1 m/ minute

Explanation:

Answer:

11 m/s

Explanation:

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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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:

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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Answer:

Deoxyribonucleic acid

Explanation:

Answer:

Deoxyribonucleic acid

Explanation: Hopes that helps

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:

125 metres

Explanation:

Distance = speed × time

Here , speed = 50m/hr

time = 2.5 hr

So,

Distance = 50 × 2.5

=125 m

Answer:

the distance of the area David has mowed =  125 m

Explanation:

given:

He has been riding on the mower at 50m/hr for 2.5 hours?

find:

What is the distance of the area David has mowed

formula = .distance = velocity x time

where velocity = 50 m/hr.

time = 2.5 hours

plugin values into the formula:

distance = 50 m/hr x 2.5 hr.

distance = 125 m

therefore,

the distance of the area David has mowed =  125 m

Answer:

3.76 m/s.

Explanation:

Velocity in mile per hour (mph) = 8.4 miles per hour

Velocity in metre per second (m/s) =?

Next, we shall convert 8.4 mph to ft/h. This can be obtained as follow :

1 mph = 5280 ft/h

Therefore,

8.4 mph = 8.4 mph / 1 mph × 5280 ft/h

8.4 mph = 44352 ft/h

Next, we shall convert 44352 ft/h to in/h. This is illustrated below:

1 ft/h = 12 in/h

Therefore,

44352 ft/h = 44352 ft/h / 1 ft/h × 12 in/h

44352 ft/h = 532224 in/h

Next, we shall convert 532224 in/h to m/h. This can be obtained as follow:

39.37 in/h = 1 m/h

Therefore,

532224 in/h = 532224 in/h / 39.37 in/h × 1 m/h

532224 in/h = 13518.51664 m/h

Next, we shall convert 13518.51664 m/h to m/min. This is illustrated below:

1 m/h = 1/60 m/min

Therefore,

13518.51664 m/h = 13518.51664 m/h / 1 m/h × 1/60 m/min

13518.51664 m/h = 225.30861 m/min

Finally, we shall convert 225.30861 m/min to m/s. This is illustrated below:

1 m/min = 1/60 m/s

Therefore,

225.30861 m/min = 225.30861 m/min / 1 m/min × 1/60 m/s

225.30861 m/min = 3.76 m/s

Therefore,

8.4 miles per hour is equivalent to 3.76 m/s.

Unit conversion does not change the real value. The velocity of the particle, when converted to meters per sec, is 3.756.

Unit conversion is a way of converting some common units into another without changing their real value. for, example, 1 centimeter is equal to 10 mm, though the real measurement is still the same the units and numerical values have been changed.

In order to convert the unit of velocity, we will first convert miles to meters and then, hours to seconds.

As it is given to us,

1 mile = 5280 ft

1 ft = 12 inches

1 m = 39.37 in

Now, since 1 m = 39.37 inches, therefore

[tex]1\rm\ in =\dfrac{1}{39.37}\ m[/tex]

Converting a mile to meter,

[tex]1\rm\ miles = 5280\ ft \times 12\ inches\times \dfrac{1}{39.38} m\\\\1\ miles = 1609.652\ m[/tex]

Converting hours to seconds

[tex]1\rm\ hour = 60\ minutes \times 60\ seconds\\\\1\ hour = 3600\ seconds[/tex]

Now, converting the velocity we will get,

[tex]1 \rm\ \dfrac{miles}{hour} = \dfrac{1609.652}{3600}\ \dfrac{m}{s}\\\\1 \rm\ \dfrac{miles}{hour} =0.447\ \dfrac{m}{s}[/tex]

Now, as given to us the velocity of a particle is 8.4 miles\hour, therefore,

[tex]8.4 \rm\ \dfrac{miles}{hour} =8.4 \times 0.447\ \dfrac{m}{s}\\\\8.4 \rm\ \dfrac{miles}{hour} =3.756\ \dfrac{m}{s}\\\\[/tex]

Hence, the velocity of the particle when converted to meters per sec is 3.756.

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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:

v=20

Explanation:

v=u + at

v=0 + 5×4

v=20

Answer:

Heyo!

Explanation:

Science, they would claim, can describe elements of the natural world but not explain them. For many scientists, this is a distinction without a difference. The Nobel Prize-winning physicist Steven Weinberg, an eloquent advocate for science's place in the realm of ideas, takes this distinction at face value - in order to demonstrate that science does indeed explain something.

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Answer:

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

Explanation: