A race car speeds up with an acceleration of 10 m/s2 for 21 s. If its final velocity is 210 m/s, find its initial velocity.

Answer:

Explanation:

18 km / h

= 300 m / min

12 km / h = 200 m / min

distance travelled in 200 minutes = 300 x 200 = 60000 m

distance travelled in 50 minute in return journey = 200 x 50 = 10000 m

total distance travelled = 70000 m

total time = 250 minute

speed = 70000 / 250

= 280 m / min

= 16.8 km / h

Total displacement = 60000 - 10000 = 50000 m

total time = 250 min

velocity = 50000 / 250

= 200 m / min

= 12 km / h

Answer:

c gasses

Explanation:

Liquid and gases  state(s) of matter have no definite shape or volume

Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gases, and plasma.

These different states of matter have different characteristics according to which they vary their volume and shape.

The solid has a definite shape and definite volume because the atoms and molecules of the solid are very close to each other forming a great bond structure.

The liquid and gaseous state have their atoms and molecules apart from each other forming a loose bonding structure because this liquid does not have a fixed shape it takes the shape of the container, similarly, gases, their atoms are far apart from each other that's why they don't have fixed shape or the fixed volume.

States of matter those have no definite shape or volume are liquids and gases.

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Answer:

Answer:first 1.39

second 0.78

third 0.64

fourth 0.54

Explanation:just did it

Explanation:

Answer:

this is it

Explanation:

Answer: They are all types of waves

A. Ripple tank

B. Electromagnetic  wave

C. Stationary  wave

D. longitudinal​wave

Explanation:

Answer:

3 m/s

Explanation:

First, find the time it takes to land.

Given in the y direction:

Δy = 0.8 m

v₀ = 0 m/s

a = 10 m/s²

Find: t

Δy = v₀ t + ½ at²

0.8 m = (0 m/s) t + ½ (10 m/s²) t²

t = 0.4 s

Next, find the velocity needed to travel 1.2 m in that time.

Given in the x direction:

Δx = 1.2 m

a = 0 m/s²

t = 0.4 s

Find: v₀

Δx = v₀ t + ½ at²

1.2 m = v₀ (0.4 s) + ½ (0 m/s²) (0.4 s)²

v₀ = 3 m/s

Answer:

So to increase current of the circuit what you can do is :

1. Use conductor of low resistivity, ¶.

2. Use conductor of small length.

3. Use thick wire.

4. Decrease the temperature of the circuit.

5. If operating temprature is high than use semiconductor, because it have negative temprature coefficient.

6. Minimise the circuit losses.

Answer:

by making dam into near the water resource

Answer:

"Faster" is most likely the answer, I'm not 100% sure though

Answer:

please provide more information about the question so that I can help you

Answer:

11.479 kilometres per litre

Explanation:

for an approximate result, divide the fuel economy value by 2.352

27 miles per gallon is equivalent to approximately 6.09 kilometers per liter.

A statement of the connection between units that are used to alter the units of a measured quantity without affecting the value is called a conversion factor. A conversion ratio (or unit factor), if the numerator and denominator have the same value represented in various units, always equals one (1).

To convert 27 miles per gallon to kilometers per liter, we need to use conversion factors:

1 mile = 1.60934 kilometers

1 gallon = 3.78541 liters

So, first we convert miles to kilometers:

27 miles * 1.60934 km/mile = 43.45218 kilometers

Then we convert gallons to liters:

1 gallon = 3.78541 liters

27 miles per gallon = 27 miles / 1 gallon = 27 / 3.78541 liters/mile = 7.13888 liters/kilometer

Finally, we divide the distance traveled in kilometers by the amount of fuel used in liters:

43.45218 km / 7.13888 liters = 6.09023 kilometers per liter

Therefore, 27 miles per gallon is equivalent to approximately 6.09 kilometers per liter.

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Answer:

A.) r = 2t

B.) V = 33.5t^3

Explanation:

Given that a spherical balloon is being inflated and the radius of the balloon is increasing at a rate of 2 cm/s

A) Express the radius (r) of the balloon as a function of the time (t).

Since the rate = 2 cm/s that is,

Rate = radius/ time

Therefore,

2 = r/t

Make r the subject of formula

r = 2t

(B) If V is the volume of the balloon as a function of the radius, find V or and interpret it.

Let assume that the balloon is spherical. Volume of a sphere is;

V = 4/3πr^3

Substitute r = 2t into the formula

V = 4/3π(2t)^3

V = 4/3π × 8t^3

V = 32/3 × πt^3

V = 33.5t^3

Answer:

golgi body

Explanation:

i took the test

Organelle packages materials and distributes them throughout the cell through the Golgi body (also known as the Golgi apparatus or Golgi complex). The correct option is C.

The Golgi body plays a crucial role in the packaging, modifying, and sorting of proteins and lipids synthesized in the endoplasmic reticulum (ER). It receives these molecules from the ER and then modifies them, such as by adding sugars or lipids. The Golgi apparatus then packages these molecules into vesicles and distributes them to their appropriate destinations within the cell, such as other organelles or the cell membrane.

A. Lysosome: Lysosomes are organelles responsible for the digestion of waste materials, cellular debris, and foreign substances. They contain enzymes that break down various molecules. Lysosomes are not involved in packaging and distributing materials throughout the cell.

B. Chloroplast: Chloroplasts are organelles found in plant cells responsible for photosynthesis, the process by which sunlight is converted into chemical energy. Chloroplasts are involved in producing energy-rich molecules (such as glucose) rather than packaging and distributing materials within the cell.

D. Cell membrane: The cell membrane (also known as the plasma membrane) is a semipermeable barrier that surrounds the cell, separating its internal environment from the external environment. While the cell membrane controls the entry and exit of substances into and out of the cell, it is not directly involved in packaging and distributing materials within the cell.

Therefore, the Golgi body is the correct answer as it specifically carries out the task of packaging and distributing materials throughout the cell.

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Answer:

This is Newton's 2nd law of motion because Newton's second law pays more attention to the mass of the object and amount of force is being put from the object.

Answer:

Choice A) A Plant cell

Explanation:

Given :

Walk in forward direction is 30 m .

Walk in backward direction is 25 m .

To Find :

The distance and displacement .

Solution :

We know , distance is total distance covered and displacement is distance between final and initial position .

So , distance travelled is :

D = 30 + 25 m = 55 m .

Now , we first move 30 m in forward direction and then 25 m in backward direction .

So , displacement is :

D = 30 - 25 m = 5 m .

Therefore , distance and displacement covered is 55 m and 5 m respectively .

Hence , this is the required solution .

Answer:

A.) 42.7 m/s

B.) 0.33 m/s^2

C.) 90 kg

Explanation:

A.) If Justin races his Chevy S-10 down highway 37 north for 2,560 meters in 60 seconds, what is his velocity? 

Velocity = displacement/time

Velocity = 2560/60

Velocity = 42.67 m/s

B.) The Chevy S-10 started rounding at 10 meters per hour. What is the acceleration at 30 seconds on the highway?

Acceleration = velocity/time

Acceleration = 10/30

Acceleration = 0.33 m/s^2

C.) The S-10 has a force of 30 N. What is the mass of the car?

Force = mass × acceleration

30 = mass × 0.33

Mass = 30/ 0.33

Mass = 90 kg

Answer:

78

Explanation:

Answer:

78

Explanation:

dakaylaRiley 12

Answer:

11.3 km/sec * 1000 m/km / 1609 m/mi = 7.02 mi / sec

7.02 mi/sec * 3600 sec / hr = 25,300 mph

The value of the speed needed to escape the pull of Earth's gravity in miles per hour (mi/h) is 25282.8.

Given the following data;

In this exercise, you're required to convert the value of the speed needed to escape the pull of Earth's gravity in kilometer per seconds (km/s) to miles per hour (mi/h).

Conversion:

1 mile = 1.609 kilometer

X mile = 11.3 kilometer

Cross-multiplying, we have;

[tex]1.609[/tex] × X = [tex]11.3[/tex]

[tex]X = \frac{11.3}{1.609}[/tex]

X = 7.0230 miles

Since we know that one (1) hour is equal to 3600 seconds, we would multiply the value of X by 3600 in order to convert it to miles per hour (mi/h).

X = 7.0230 × 3600

X = 25282.8 mi/h

Therefore, the value of the speed needed to escape the pull of Earth's gravity in miles per hour (mi/h) is 25282.8.

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Answer:

2,1,3

Explanation:

Edge 2020

Answer:

B.

Explanation:

K is the SI unit for Kelvin which measures temperature.

kg is NOT an SI unit, g is the SI unit for mass.

L is NOT an SI unit, m^3 is the SI unit for volume.

Therefore the answer is B.

Answer:

a)The vehicle will enter your lane

Explanation:

The complete question is

You are driving down a two-lane road at 45 mph. The oncoming vehicle's right  wheels drop off the pavement. The most likely occurrence is...

a)The vehicle will enter your lane

b)The vehicle will continue on the shoulder of the road.

c)The vehicle will spin out and hit a tree.

d)The vehicle will return smoothly back onto the road.

The dropping off of the oncoming vehicle's right wheel off the pavement will force the driver to overturn to the left towards you, and this might lead to the vehicle entering your own lane.

Answer:

TRUE. so is breathing, sweating

hope this helped :)

Answer:

In a biology experiment the number of yeast cells is determined after 24 hours of culture at different temperatures. a) Identify the independent and dependent variables in the experiment. b) Draw the graph of the

Explanation:

probably a little late on this but the dude got everything wrong heres a screenshot of the answers.

Solubility: the ability of a substance to dissolve in another.

Density: the amount of mass in a given volume.

Buoyant force: the upward force on an object in a fluid.

Conductivity: the ability of a substance to transfer heat or electricity.

Boiling point: the temperature at which a liquid becomes a gas.

Solubility can be defined as a measure of how readily a substance dissolves in a solvent to form a solution.

Density can be defined as mass all over the volume of an object.

Buoyancy can be defined as an upward force created by the fluid (liquid) displaced by an object.

Conductivity can be defined as the ability of an object, substance or body to transfer heat or electricity to another.

Boiling point is the temperature at which a physical matter changes phase from liquid to gas.

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Answer:

The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

Answer:

Explanation:

a. time 0 = 0

time 5 = 5

c. all values are equilvalents.

b. slope is x = y

Answer: 172

Explanation: Because yeah

Answer:

The pressure in pipe b is 33.4 kpa.

Explanation:

Given that,

Pressure in pipe a = 30 mm hg vacuum

Differential reading = 0.30 m

We need to calculate the pressure in pipe b

Using diagram

[tex]P_{B}+W_{oil}(h_{1}+h_{2})-W_{Hg}(h_{2})-W_{H_{O}}(h_{1})=P_{A}[/tex]

Where, P = pressure

W= specific weight

Put the value into the formula

[tex]P_{B}+W_{oil}(0.15+0.30)-W_{Hg}(0.3)-W_{H_{2}O}(0.15)=-W_{Hg}(0.030)[/tex]

Put the value of specific weight

[tex]P_{B}=-(133)\times(0.030)-(8.95)\times(0.45)+133\times(0.3)+9.80\times0.15[/tex]

[tex]P_{B}=33.4\ kPa[/tex]

Hence, The pressure in pipe b is 33.4 kpa.