bold completed over 100m in 9.58
seconds what is his average speed​

Answers

Answer 1

Answer:

At the Berlin 2009 World Championships, Bolt set a world record time of 9.58 seconds for the 100m race, notching a top speed of 27.8 miles per hour (44.72 kilometers per hour) between meters 60 and 80, with an average speed of 23.5 mph.

Explanation:


Related Questions

How long does it take to run 2000 meters if you run 2 m/s

Answers

Answer:

1000 seconds.

Explanation:

is a tree a living or non living thing?

Answers

Answer:

Living thing

Explanation:

Nonliving things do not move by themselves, grow, or reproduce.

Answer:

Living

Explanation:

Unless you cut the tree, making that thang dead- its living

Jake and Amir are both standing on identical skateboards and
perform a physics experiment in which they push off one
another to move. Jake is taller and more massive than Amir. If
Jake pushes with 20 N of force, what force would he feel
backwards away from Amir? F= N

Answers

Answer: 20

Explanation:

If Jake pushes with 20 N of force, the force that he would feel backwards away from Amir is 20N

Force simply means the strength or energy that can later the position of an object. Force can also be described as a push or pull.

It should be noted that since Jake pushes with 20 N of force, the force that he would feel backwards away from Amir will be the exact force that was used in pushing.

This will therefore be 20 Newton as well.

Read related link on:

https://brainly.com/question/18038995

THIS IS SOOO IMPORTANT PLS HELP I’LL GIVE BRAINIEST

Describe the evidence of chemical changes that occurred during the etching process in:

a. your circuit board.

b. the copper chloride etching solution.

Give at least one piece of evidence for parts a & b--> Have at least one full sentence for each answer.

Answers

Answer:

Chemical etching is a process of printed circuit board (PCB) manufacturing that provides  many advantages over mechanical methods.

Explanation:

There's one! UvU hope this helped in whatever you're in for! <3

Good Luck!

What best describes the states of nonmetals when they are at room temperature?

Most nonmetals are gaseous, but some are liquid or solid.
All nonmetals are gaseous unless they bond with a metal.
Most nonmetals are solids, but some are gaseous or liquid.
All nonmetals are solid unless they bond with a metal.

Answers

Answer:

A.) Most nonmetals are gaseous, but some are liquid or solid

Explanation:

Answer:

a

Explanation:

Question 6 (14 points)
A 3.68 kg object is tied to the end of a cord and whirled in a horizontal circle of radius 881 cm. The object completes 10.8 revolutions every 18.8
s. What is the centripetal acceleration of the object?

Answers

Answer:

[tex]a=114\ m/s^2[/tex]

Explanation:

Given that,

Mass of an object, m = 3.68 kg

It is whirled in a horizontal circle of radius 881 cm or 8.81 m

The object completes 10.8 revolutions every 18.8 s.

We need to find the centripetal acceleration of the object. It is given by the formula as follows :

[tex]a=\omega^2 r[/tex] ...(1)

Where [tex]\omega[/tex] is angular velocity

10.8 revolutions = 67.85 rad

[tex]\omega=\dfrac{67.85\ rad}{18.8\ s}\\\\=3.6\ rad/s[/tex]

Put values in equation (1)

[tex]a=3.6^2\times 8.81\\\\a=114\ m/s^2[/tex]

So, the centripetal acceleration of the object is [tex]114\ m/s^2[/tex].

Which of the following would be an example of mechanical energy?

Elastic Energy, Kinetic Energy, Gravitational Potential Energy

Gravitational Potential Energy, Thermal Energy

Electric Potential Energy, Nuclear Energy, Kinetic Energy

Magnetic Energy, Elastic Potential Energy

Answers

C. Electric potential energy, nuclear energy, and kinetic energy

Answer:

A) Elastic Energy, Kinetic Energy, and Gravitational Potential Energy

Explanation:

Hope this helps!

A box is sitting stationary on a long level ramp on level ground. The coefficient of static friction is (1.0). One end of the ramp is slowly lifted higher and higher. What is the angle of the ramp with respect to the ground when the box begins slidig?

Answers

Answer:

45 degrees

Explanation:

Given that the coefficient of friction, [tex]\mu=1.0[/tex]

Let the angle of the ramp be [tex]\theta[/tex].

The gravitational force acting downward [tex]=mg[/tex]

The normal reaction by the ramp on the box, [tex]N=mg\cos\theta[/tex]

So, the maximum frictional force that can act on the box, [tex]f= \mu N[/tex]

The force along with the plane in the direction of sliding, [tex]F = mg\sin\theta[/tex]

When the box begins sliding, the F must have to overcome the frictional force,f.

So, F=f

[tex]mg\sin\theta=\mu N \\\\mg\sin\theta=\mu mg\cos\theta \\\\\frac {\sin\theta}{\cos\theta}=\mu \\\\\tan\theta=\mu \\\\\theta=\tan^{-1}\mu \\\\[/tex]

Putting the value of \mu, we have

[tex]\theta=\tan^{-1}1[/tex]

[tex]\theta=45[/tex] degrees.

Hence, the angle of the ramp with respect to the ground when the box begins sliding is 45 degrees.

Harry Styles fires a T-shirt cannon horizontally off a stage 10 meters high, with an
initial velocity in the x-direction of 5 meters per second. How far away from the
stage should you stand to be able to catch the t-shirt?

Answers

Answer:

7.15 m

Explanation:

From the question given above, the following data were obtained:

Height (h) = 10 m

Initial velocity (u) = 5 m/s

Horizontal distance (s) =?

Next, we shall determine the time taken for the shirt to get to the ground. This can be obtained as follow:

Height (h) = 10 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h= ½gt²

10 = ½ × 9.8 × t²

10 = 4.9 × t²

Divide both side by 4.9

t² = 10 / 4.9

t² = 2.04

Take the square root of both side

t = √2.04

t = 1.43 s

Finally, we shall determine the horizontal distance travelled by the shirt. This can be obtained as follow:

Initial velocity (u) = 5 m/s

Time (t) = 1.43 s

Horizontal distance (s) =?

s = ut

s = 5 × 1.43

s = 7.15 m

Thus, the shirt will land at 7.15 m away from the stage. Thus, to catch the shirt, you must be at a point 7.15 m away from the stage.

Why was basketball invented?

Answers

people were probably bored so they threw rocks into hoops


[tex] \frac{1}{(1 - \sqrt{3) {}^{2} } } [/tex]

Answers

Answer:

\frac{2+\sqrt{3}}{2}

Explanation:

so we simplify tthe denominator first

[tex](1-\sqrt{3})^2=[/tex][tex]4-2\sqrt{3}[/tex]

so the new fraction is:[tex]\frac{1}{4-2\sqrt{3}}[/tex]

We'll ratinalize the fraction to get: [tex]\frac{2+\sqrt{3}}{2}[/tex]

What is the speed of a rocket that travels 9,000 meters in 12 seconds?
A. 0.001 seconds
B. 750 seconds
C.750 m/s
D. 108,000 m/s

Answers

Answer:

750 m/s

Explanation:

The speed of the rocket can be found by using the formula

[tex]v = \frac{d}{t} \\ [/tex]

d is the distance

t is the time taken

From the question we have

[tex]v = \frac{9000}{12} \\ [/tex]

We have the final answer as

750 m/s

Hope this helps you

Answer:750m/s

Explanation:I got 750m/s :D Hopefully this helped! lol

Which of the following has the largest momentum?
a. 5kg bowling ball moving with a velocity of 2m/s
b. A 4kg rock rolling down a hill with a velocity of 3m/s
c. A 200kg rock sitting on top of a hill that is 5m height.
d. 0.0025kg bullet that is moving with a velocity of 200m/s

Answers

Answer:

Option b

Explanation:

The formula of momentum is [tex]p=mv[/tex]

where p is the momentum , m is the mass in kg and v is the velocity in m/s, so

a) momentum is

[tex]p=mv\\p=5(2)\\p=10[/tex]

b) momentum is

[tex]p=mv\\p=4(3)\\p=12[/tex]

c) momentum is

here since the rock is sitting on top of a hill which means the object is stationary or in other words the object is at rest, which means if an object is at rest the velocity is 0m/s so momentum is zero of a stationary object because

[tex]p=mv\\p=200(0)\\p=0[/tex]

d) momentum is

[tex]p=mv\\p=0.0025(200)\\p=0.5[/tex]

so the highest momentum is in part b which is 12 so option b is our answer.

Answer:

c

Explanation:

A sky diver with a mass of 80 kg jumps from a plan. They are accelerating at a constant rate due to gravity which is 9.8 m/s2. What is the net Force of the sky diver? Show your work.

Answers

Answer:

At terminal velocity, the drag force = mass x g

Explanation:

Force = 80 kg x 9.8 m/s2 = 784 kgm/s2 = 784 N

Plz do it all plz plz and i will give brainlest and thanks to best answer do it right plz

Answers

Answer:   Hawk.

Explanation: I dont know for sure, but thats what it looks like to me.

How much power will it take to move a 10 kg mass at an acceleration of 2 m/s² a distance of 10 meters in 5 seconds?

Answers

Answer:

100 Watts

Explanation:

These equations are needed to work out the answer:

power= work done/ time takenwork done= force* distanceforce= mass* acceleration

force: 10 kg* 2m/s= 20

work done: 20* 10m=200

power: 200/2=100

A boat travels at 15 m/s in a direction 45° east of north for an hour. The boat then turns and travels at 18 m/s in a direction 5° north of east for an hour.

Answers

Answer:

first one 31

second one 23

Explanation:

on edge ;))

Why might it be important to know your inherited traits passed down by your parents?

Answers

Answer:

health factors that could harm you or your offspring

In a physics demonstration, two identical balloons (A and B) are propelled across
the room on horizontal guide wires. The motion diagrams (depicting the relative
position of the balloons at time intervals of 0.05 seconds) for these two balloons are
shown below.
Balloon A
Balloon B
Which balloon (A or B) has the greatest acceleration? Explain.
Which balloon (A or B) has the greatest final velocity? Explain.

Answers

Okay yeah so umm check I ain’t never

A 2000 kg minivan runs into a 800 kg car that was at rest at a stop sign and they stick together. If the compact car does not stick to the van but, instead, causes the minivan to come to a complete stop. How fast will the car be going after the collision?

Answers

Answer:

 v₂ = 2.5 v₁

car leaves at 2.5 times the speed of the minivan

Explanation:

This is an exercise of conservation of the momentum, to solve it we create a system formed by the minivan and the car, therefore during the crash the forces are internal and the momentum is conserved.

Initial instant. Before the crash

        p₀ = M v₁+ 0

Final moment. After the crash

        [tex]p_{f}[/tex] = M 0 + m v₂

how momentum is conserved

         p₀ = p_{f}

         M v₁ = m v₂

         v₂ = [tex]\frac{M}{m}[/tex] v₁

           

let's calculate

        v₂ = 2000/800 v₁

        v₂ = 2.5 v₁

therefore the car leaves at 2.5 times the speed of the minivan

In physics,
is defined as a change in position over time.
a.distance
b.motion
c.momentum
d.vector

Answers

I think the answer is B. It can also be called “ displacement”
Is A or B but I think is B Fs

What are the two factors affect the weight of an object?

Answers

Answer:

mass and distance

Explanation:

hope this helped

In 1989 Carl Lewis established a world record when he ran the hundred meter dash in 9.92 seconds. What was his average speed (in M/S) for the race? Remember to include your data, equation, and work on solving the problem.

Answers

Answer:

10.08 m/s

Explanation:

The average speed of a body or an object can be calculated from the ratio of the total distance traveled by the body/object to that of the time taken to cover the distance.

Mathematically,

Average speed = total distance/total time

The total distance covered by Carl Lewis = 100 m

The total time taken = 9.92 s

Hence,

Average speed of Carl Lewis = 100/9.92

                                         = 10.08 m/s

The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments. Which is NOT true about the role of the asthenosphere in plate tectonics?

Answers

Complete option to the question:

A. The asthenosphere is broken up into large continental- and ocean-sized plates.

B. Convection currents within the asthenosphere push magma upward to create new crust.

C. Heat from deep within Earth is thought to keep the asthenosphere malleable.

D. The asthenosphere is the repository for parts of the lithosphere that are dragged downward in subduction zones.

Answer: The correct option is A (The asthenosphere is broken up into large continental- and ocean-sized plates.)

Explanation:

Among the components that makes up the earth crust are the lithosphere and the asthenosphere.

The LITHOSPHERE is the outer layer of the earth structure which consists of the upper part of the mantle and the crust.

The ASTHENOSPHERE is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments. It is denser and weaker layer of the upper mantle which permits the movement of tectonic plates in the lithosphere.

The asthenosphere is the repository for parts of the lithosphere that are dragged downward in subduction zones.Heat from deep within Earth is thought to keep the asthenosphere malleable. And the convection currents within the asthenosphere push magma upward to create new crust. But it is not broken up into large continental- and ocean-sized plates.

A car’s momentum is p when it is traveling with a velocity of v. If the velocity of that car doubles, what is the new momentum of the car?

Answers

Answer:

∆p=(m2v)kg.m/s

Explanation:

∆p=mv where v=2v. hence ∆p=m2v

Answer:

c. 2p

Explanation:

edge 2021

An example of a poor coping mechanism is ?

Answers

Answer: A bad, maladaptive, unhealthy or destructive coping mechanism is one where the behavior does not resolve the problem in the long-term and may actually increase the harm. Unhealthy coping strategies may feel like they are having the desired effect in the short term.

Explanation: Yes, it was from google...

How can we use magnetic fields to transport objects from one location to another?

Answers

Wow this is a tough one

Energy that is stored is called...

Answers

Answer:

Potential energy

Explanation:

Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.

- Scientific Forms of Energy_ Stored Energy, Kinetic Energy ...ei.lehigh.edu › learners › energy › readings › energy_basics

Potential energy

Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges.

When light is directed on a metal surface, the kinetic energies of the photoelectrons a) are random b) vary with the frequency of the light c) vary with the intensity of the light d) vary with the speed of the light

Answers

Answer:

b) vary with the frequency of the light

Explanation:

The phone electric effect can be expressed as

K.E=(hv -W•)

Where K.E is the Kinectic energy

W• = work function of the metal

ν =frequency of the radiation

h = Planck's constat

Then, we can see that K.E is proportional linearly to "v" in the equation above.

Therefore, When light is directed on a metal surface, the kinetic energies of the photoelectrons vary with the frequency of the light

On a sunny summer day, why does a white car with a light-colored interior stay cooler than a black car with a dark-colored interior?

Solar radiation reflects off the lighter colours, away from the car, thus keeping the car cool

Solar radiation is absorbed into the lighter colours, keeping the car cool

Solar radiation is absorbed into the darker colours, keeping the car cool

Solar radiation reflects off the darker colours, away from the car, thus keeping the car cool

Answers

Answer: Solar radiation reflects off the lighter colours, away from the car, thus keeping the car cool

Explanation: This is because lighter colors reflect a good amount of radiation while darker colors absorb it. Just like, Antarctica hasn't completely melted because it reflects a lot of the heat that is acting upon it. Or, you notice that you get hotter when you wear a black shirt opposed to a white one.

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