Driving at 75 m/s, you hit the brakes on your new car, accelerating at
a rate of -20 m/s2. How much time will it take the car to come to
rest?

Answer:

[tex]7.5 \times 10 {}^{6} [/tex]

Explanation:

Speed of electromagnetic waves=

[tex]3 \times 10 {}^{8} ms[/tex]

m/s

[tex] = 3 \times 10 {}^{8} ms \times 0.025[/tex]

[tex] = 3 \times 10 {}^{8} \times \frac{1}{40} [/tex]

[tex] = 7.5 \times 10 {}^{6} m[/tex]

Answer:

True

Explanation:

Charging by conduction occurs when a charged conductor comes in contact with an uncharged conductor, leading to the sharing of charges between both conductors. Contact charging leads to a sharing and distribution of the same type of charges on the two conductors.

In this case, your entire body is charged by the sole of your feet coming in contact with the charged carpet on the floor, leading to a charge buildup all over your body.

Answer:

Glass & Plastic Bottle Measuring Systems Definitions. Milliliter (ml): Milliliters are used in the metric measurement system to measure units of liquid volume. One milliliter is equal to one cubic centimeter or 1/1000 of a liter…

Explanation:

Answer:

$ 115.76

Explanation:

From the question given above:

1 pound of a chemical cost $ 5.25

To obtain the cost of 10 Kg of the compound, we must convert 10Kg to pound. This can be obtained as follow:

1 Kg = 2.205 pound

Therefore,

10 Kg = 10 Kg / 1 Kg × 2.205 pound

10 Kg = 22.05 pound

Therefore, 10 Kg is equivalent to 22.05 pounds

Finally, we shall determine the cost of 22.05 pounds as follow:

1 pound of a chemical cost $ 5.25.

Therefore, 22.05 pounds of the chemical will cost =

22.05 pound / 1 pound × $5.25

= $ 115.76

Therefore, 10 Kg (i.e 22.05 pound) of the chemical cost $ 115.76

Answer:

82 km/h

Explanation:

Given that A boat sailed 560 km in 8 hrs. It took three hours to travel the first 150 km. That is,

The remaining distance will be:

560 - 150 = 410 km

the remaining time will be:

8 - 3 = 5 hours

For the remaining Journey, average speed will be:

Speed = distance/time

Speed = 410/5

Speed = 82 km/h

Therefore, the average speed for the remaining journey will be 82 km/h

Answer:

a variable (often denoted by y) whose value depends on that of another.

Answer:

it means it has pressure of 13.6 CM mercury on an area

Answer:

There are many examples of electrostatic phenomena, from those as simple as the attraction of the plastic wrap to one's hand after it is removed from a package to the apparently spontaneous explosion of grain silos, the damage of electronic components during manufacturing, and photocopier & laser printer operation

Answer:

80/2= 40 m/s^2.

Explanation:

A jet starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s.  Its acceleration is 4 m/sec².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

acceleration = change in velocity / time

acceleration = 80 / 20

acceleration = 4 m/sec²

A jet starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s.  Its acceleration is 4 m/sec².

To learn more about acceleration refer to the link:

brainly.com/question/12550364

#SPJ2

Answer:

Prokaryotic Cells are cells that lack Cell Nucleus so the answer is bacteria

Answer:

B Bacteria

Explanation:

Choice B because the prokaryotes are single-celled organism with no nucleus.

Answer:

velocity of the object

Explanation:

For an object moving at a constant acceleration, we would expect to see a position graph with a curved shape and a velocity graph with a straight shape.

The slope of a linear position graph tells us the velocity of the object.

In physics, velocity is the rate of change of an object's position with respect to time. It is a vector quantity, meaning that it has both magnitude and direction. The magnitude of velocity is called speed.

The slope of a linear position graph is calculated by dividing the change in position by the change in time. The units of slope are meters per second (m/s) or feet per second (ft/s).

A positive slope indicates that the object is moving to the right, while a negative slope indicates that the object is moving to the left. The steeper the slope, the faster the object is moving.

Find out more on linear position graph here: https://brainly.com/question/28676522

#SPJ6

Answer:

i was doing this is it actually 0.6

Explanation:

;D

The acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

Motion is simply the change in position of an object over time.

From the First Equation of Motion;

v = u + at

Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.

Given the data in the question;

To determine the acceleration of the skateboard, we substitute our given values into the expression above.

v = u + at

10m/s = 4m/s + ( a × 10s)

( a × 10s) = 10m/s - 4m/s

a × 10s = 6m/s

a = 6m/s ÷ 10s

a = 0.6m/s²

Therefore, the acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².

Learn more about Equations of Motion here: brainly.com/question/18486505

Answer:

Average speed = 1 m/s

Explanation:

Given that,

Ohnny walks 900 meters to the store to buy a candy bar. He then walks back home. It would mean that the total distance covered by him is 900 m + 900 m = 1800 m

His total trip took him 30 minutes or 1800 seconds

We need to find the average speed. It is equal to the total distance divided by the total time taken. So,

[tex]v=\dfrac{1800\ m}{1800\ s}\\\\v=1\ m/s[/tex]

So, his average speed is 1 m/s.

Another reason why cats hate water is attributed to their history. There is not much in a cat's background to recommend them for successful interactions with bodies of water, be it small or big. Cat's ancestors lived in dry arid places which means rivers or oceans weren't obstacles they had to face.

Hope this helps:)

Answer:

The speed of the car after the break was applied is  90.46 m/s

Explanation:

Given;

initial velocity of the car, u = 26.8 m/s

accelertation of the car, a = -8.2 m/s²

time of motion, t = 14.3 s

final velocity, v = ?

Apply the following kinematic equation;

v = u + at

v = 26.8 + (-8.2 x 14.3)

v = 26.8 -  117.26

v = -90.46 m/s

magnitude of the final velocity = 90.46 m/s

Therefore, the speed of the car after the break was applied is  90.46 m/s

Answer:

Apparently this has been asked a few years ago, so I copied this answer from deepikakvvk06 - - all credit goes to them!

velocity of car 'B' after collision is 22.5m/s. //it's a conservation of momentum question

Explanation:

Let ,

mass = m

initial velocity = u

final velocity = v

here ,

m₁= 1500 kg

m₂=1000 kg

u₁ = 25 m/s

u₂ = 15 m/s

v₁ = 20 m/s

we have to find v₂ !!

v₂ is the velocity after collision

Here is a formula relating the values given ,

m₁u₁+m₂u₂ = m₁v₁ + m₂+v₂

m₁u₁+m₂u₂ = 1500 × 25 + 1000 ×15

= 37500 + 15000

= 52500

m₁v₁ + m₂+v₂ = 1500 × 20 + 1000 × v₂

= 30000 + 1000v₂

m₁u₁+m₂u₂ = m₁v₁ + m₂+v₂

52500 = 3000 + 1000v₂

1000v₂ = 52500 - 30000

1000 v₂ = 22500

v₂ = 22500/1000

= 22.5 m/s

Thus, velocity of car 'B' after collision is 22.5m/s.

The above are questions related to the formula of force F = m * a i.e. mass * accleration. It is defined by the Newton's second law of motion.

In the attachment, I can see that Question 1) and Question 2) are already done, So lemme start from Question 3[tex])[/tex]

3) Provided:-

To FinD:-

By using formula,

⇛ F = ma

⇛ 7000 N = 0.5 kg × a

⇛ a = 7000 / 0.5 m/s²

⇛ a = 14000 m/s²

So, the ball acclerates at the rate of 14000 m/s².

4) Provided:-

To FinD:-

By using formula,

⇛ F = ma

⇛ F = 31200 kg × 10 m/s²

⇛ F = 312000 kg/m/s²

⇛ F = 312000 N

So, force on the truck = 312000 N

5) a) Force applied = 100 N

Mass applied = 5 kg

Then, Acceleration = 100 ÷ 5 = 20 m/s²

b) Force applied = 100 N

Mass applied = 10 kg

Then, Acceleration = 100 ÷ 10 = 10 m/s²

c) Force applied = 100 N

Mass applied = 20 kg

Then, Acceleration = 100 ÷ 20 = 5 m/s²

d) Force applied = 100 N

Mass applied = 50 kg

Then, Acceleration = 100 ÷ 5 = 2 m/s²

And we are done !!

#CarryOnLearning

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Answer: The answer are above :(

Answer:

they're important because they simplify the results of the comparison

Answer:

No they are totally different...

Velocity is displacement/time. while vector is both magnitude and direction.....

Velocity is a vector quantity because it has both magnitude and direction

Answer:

An elephant.

Explanation:

The amount of matter contained inside a body is called its mass. It is independent of the location of the object. It remains the same always.

Out of the four options we need to tell which animals would be measured to have the most mass. It is very clear that, an elephant has most mass. It is very huge in size of three other animals.

Hence, the correct option is (A).

Answer:

I think its a Elephant

Explanation:

a,

Explanation:

because when its moved thats the sugar of it

Answer:

b. Chloroplast

Explanation:

Given :

Mass of block , m = 1.35 kg .

Speed constant , k = 15 N/m .

Speed at centre , v = 34 cm/s = 0.34 m/s .

To Find :

The amplitude of oscillation .

Solution :

Now , we know total energy is conserved in SHM .

So , K.E at zero displacement :

[tex]K.E=\dfrac{mv^2}{2}\\\\K.E=\dfrac{1.35\times 0.34^2}{2}\\\\K.E=7.8\times 10^{-2}\ J[/tex]

Now , this K.E is equal to maximum P.E :

[tex]P.E=K.E=7.8\times 10^{-2}\ J[/tex] .

[tex]P.E=\dfrac{kA^2}{2}\\\\7.8\times 10^{-2}=\dfrac{kA^2}{2}\\\\A=\sqrt{\dfrac{2\times 7.8 \times 10^{-2}}{15}}\ m\\\\A=0.1019 \ m\\\\A=10.2\ cm[/tex]

Therefore , the amplitude is 10.2 cm .

Hence , this is the required solution .

Answer:

Explanation:

Using one of the equation of motion expressed as v = u+at where;

v is the final velocity = 2.0m/s

u is the initial velocity = 25m/s

a is the acceleration = -a (since the acceleration is negative)

t is the time taken

Substituting the given parameters into the formula above;

2.0 = 25-9.81t

subtract 25 from both sides

2.0 - 25 = 25-9.81t - 25

-23 = -9.81t

Divide both sides by -9.81

-23/-9.81 = -9.81t/-9.81

t = 23.0/9.81

t = 2.35s

Hence it took the car 2.35s to slow to a final velocity of 2.0 m/s

Answer:yes

Explanation:

Answer:

Your hypothesis would be proven wrong.

Explanation:

To have a hypothesis be refuted, your hypothesis would be able to be proven wrong. A hypothesis has to be able to be supported and refuted, or proven wrong.