what is the speed of an object that travels 40m in 2 s?

Answer:

D) 100 kilometres/hour.

Explanation :

Given -

To find -

Solution -

★ Velocity = displacement/time

→ V = 200/2

→ v = 100 km/h

Therefore, the average velocity of the car is 100 km/h.

Answer:

Ek =  981000 [J]

Explanation:

To solve this problem we must use the principle of energy conservation, where kinetic energy is transformed into potential energy or vice versa. In this special case we take the reference level of potential energy in the soil (potential energy equivalent to zero). When the potential energy is zero, this energy has been transformed into kinetic energy and the velocity will be maximum.

[tex]E_{k} =\frac{1}{2}*m*v^{2}[/tex]

[tex]E_{p}=m*g*h[/tex]

where:

Ek = kinetic energy [J]

Ep = potential energy [J]

m = mass = 200 [kg]

h = elevation = 500 [m]

[tex]E_{p}= E_{k}[/tex] (energy conservation)

Ep = 200*9.81*500

Ep = 981000 [J]

And the kinetic energy is equal to:

Ek = Ep =  981000 [J]

Answer:

There is not enough information to solve how fast the rock was traveling

They are both very fast, as mountain goats are very fast, and if he ducks, he was faster than the rock. The speed compares

Explanation:

I did find this tho.

This question can be solved by using the law of conservation of energy.

a) The rock is traveling at "28 m/s" when it passes billy.

b) The speed of the rock is "1.12 times" the speed of the car.

a)

We can find the speed of the rock by using the law of conservation of energy:

Loss of Potential Energy = Gain in Kinetic Energy

[tex]mgh = \frac{1}{2}mv^2\\\\2gh = v^2\\v = \sqrt{2gh} \\\\[/tex]

where,

v = speed of the rock = ?

g = acceleration due to gravity = 9.81 m/s²

h = height = 40 m

Therefore,

[tex]v = \sqrt{2(9.81\ m/s^2)(40\ m)}[/tex]

v = 28 m/s

b)

Now, we find the ratio between the speed of the rock and the speed of the car:

[tex]\frac{speed\ of\ rock}{speed\ of\ car} = \frac{28\ m/s}{25\ m/s}\\\\speed\ of\ rock = (1.12)speed\ of\ car[/tex]

Learn more about the law of conservation of energy here:

https://brainly.com/question/20971995?referrer=searchResults

The attached picture explains the law of conservation of energy.

Answer: ...

Explanation: 1: The dog is walking 0.4625MPS (Meters per second. M/S)

To calculate speed you divide the distance by time so 55.5 Meters/120 Seconds is 0.4625 MPS

2: The car traveled 15 KM

To calculate speed you need to multiply the speed by time. (Since it's multiplication it can be put in any order) So 600 Secondsx25 Meters is 15,000 M which is 15 KM.

3: It would take 8 Minutes and 20 Seconds to travel 1500 Meters.

To calculate the time you multiply Speed by distance (Order doesn't count.)

So 1500 Metersx3 MPS is 8 Minutes and 20 seconds.

4: It was going 2.7775 MPS.

To calculate the speed you divide the distance over time. So 9999 Meters/3600 seconds is 2.7775 MPS.

5: It was going 1.1222... (Infinite)

To calculate the speed you divide the distance over time

So 8080 Meters/ 7200 Seconds is 1.222...

6: It would cover 1.375 Meters.

To calculate the Distance you multiply Speed by time (Order doesn't count.)

So 10.25 Secondsx5.5 MPS is 1.375 Meters.

7: It would take 1 Minute and 31 Seconds to travel 10 Meters.

To calculate the time you multiply Speed by distance (Order doesn't count.)

So 10 Metersx0.11 MPS is 1 Minute and 31 seconds

Hopes this helps because this took over 10 minutes.

Answer:

The resolution is when Jonathan finds a new friend in his neighbor after his other one moves away. (B).

Explanation:

Hope this helps

Answer:

w=225000 J

E=225000 J

P=9000 W

P=22500 W

Explanation:

Ew=Fd=E

P=E/t

(A) w=225000 J

(B) E=225000 J

(C) P=9000 W

(D) P=22500 W

Aristotle famously described a force as anything that generates an object to undergo “unnatural motion. Sir Isaac Newton was one of the preferred scientists to explore gravity and force. Any kind of force is simply a push or a pull. It can be described as a push or pull on an object.

Thus, Ew=Fd=E (P=E/t)

Force can assemble a body that is at rest to move.

It can contain a moving body or slow it down.

It can accelerate the acceleration of a moving body.

It can also modify the direction of a moving body along with its build and size.

Find more information about Force here:

https://brainly.com/question/11701736

Answer:

conduction

Explanation:

Answer:

Radiation

Explanation:

Conduction: movement of something such as heat or electricity through a medium

Convection: movement in a gas or liquid in which the warmer parts move up and the cooler parts move down

Radiation: emission or transmission of energy in the form of waves or particles through space or through a material

Answer:

The correct answer is A.

Explanation:

Answer:

A. A lower voltage into a higher voltage

Explanation:

A P E X

Answer:

the first one

Explanation:

an atoms ability to attract other electrons and form a chemical bond

since other one got deleted :(

Electronegativity is an atom's ability to attract other electrons and form a chemical bond.

The tendency of an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond is known as electronegativity.

The electronegativity of an atom is affected by its atomic number as well as the distance between its valence electrons and the charged nucleus. The higher the associated electronegativity, the more an atom or substituent group attracts electrons.

Electronegativity is a simple way to quantify bond energy as well as the sign and magnitude of a bond's chemical polarity, which characterizes a bond along a continuous scale from covalent to ionic bonding.

Hence, electronegativity is an atom's ability to attract other electrons and form a chemical bond.

Learn more about electronegativity here:

https://brainly.com/question/17762711

#SPJ2

Answer:

2 hours

Explanation:

Answer:

Explanation:

To the atomic mass;

1.   Atomic mass is the number of protons + neutrons;

  When a new proton is added, the atomic mass increases.

   When a proton is removed, the atomic mass reduces

The mass of an atom is concentrated in the nucleus where there is the proton and neutron.

2. Atomic number is the number of protons:

When a new proton is added, the atomic number increases

When a new proton is removed, the atomic number reduces

3. Charge:

 An atom is neutral if the number of positive charges is the same as negative charges:

    Protons = electrons

If :

   Protons > electrons = +Ve charges

   Protons < electrons =  -Ve charges

Answer:

Explanation:

it is a coal power plant , nuclear power is economical and does not fluctuate as much as wind or solar power.

Unlike coal, it is considered clean in terms of the amount of greenhouse gas emissions produced by the power plant itself, although uranium mining and processing are not without risks and environmental impact

Explanation:

ANSWER

g

m

=

R

2

GM

1.4=

R

2

(6.667×10

−11

)(7.34×10

22

)

R=

1.4

6.667×10

−11

(7.34×10

22

)

=

34.95×10

11

=1.87×10

6

m

HOPE IT'S HELP AND PLZ FOLLOW ME

Answer:

items that would sink : spoon marbles rocks

Explanation:

items that would float : straw feather cotton

Answer:  Temperature is also a condition that affects the speed of sound. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second.

Explanation: so basically, yes!

Explanation:

Initial speed, u = 0 km/h

Final sped, v = 50 km/h

Time, t = 8 s

1 minute = 60 seconds

⇒ 1 s = (1/60) minutes

⇒8 s = 0.1334 minutes

Acceleration,

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{50\cdot\dfrac{5}{18}}{8}\\\\a=1.73\ m/s^2[/tex]

Hence, this is the required solution.

Explanation:

a fraction that is created when we slide something in a motion

Answer:

a) 8m.[tex]s^{-2}[/tex]

b) 6.4N

Explanation:

a)Using [tex]s=ut+1/2at^{2}[/tex]

s=16

u=0

t=2

a=?

16=1/2a(4)

a=8m.[tex]s^{-2}[/tex]

b) F=ma

Where m is in kg

Convert 800g to kg

800/1000=0.8kg (1000g in a kg)

F= 0.8 x 8 = 6.4N

Answer:

t = 9.36 s

Explanation:

Given that,

Initial velocity, u = 0 (at rest)

Final velocity, v = 77 m/s

Acceleration of the airplane, a = 8.2 m/s²

We need to find the time required for an airplane to take off its speed 77 m/s. Let t be the time. using first equation of motion to find it as follows :

v=u+at

[tex]t=\dfrac{v-u}{a}\\\\t=\dfrac{77}{8.22}\\\\t=9.36\ s[/tex]

so, the airplane will take 9.36 seconds.

Answer:

Either A or D

Explanation:

Answer:

c

Explanation:

its c because high winds foRM A HURRICAN AND WARM TO AND ESPECIALY IF IT IS 80 DEGRESES

Answer:

584.32m

Explanation:

Firstly, we need to find the x and y components of each vector.

x-component for vector L=303cos205°=-274.61

y-component for vector L=303sin205°=-128.05

x-component for vector M=555cos105°=-143.64

y-component for vector M=555sin105°=536.09

Since it's the vector sum, we add the x and y components of each vector.

Resultant vector x-component -274.61+(-143.64)=-418.25

Resultant vector y-component -128.05+536.09=408.04

Now, to find the magnitude, we use the formula [tex]\sqrt{x^{2}+y^{2}}[/tex]

sqrt(-418.25^2+408.04^2)=584.32m

Check my work for errors just in case.

Answer:

True

Explanation:

Answer:

answer down below

Explanation:

hi! newton's third law applies to a lot of things. this is shown when we jump, bounce a ball, or push something, for example. the law states that for every action, there an equal and opposite reaction. when you bounce a ball, it bounces back up at the same force at which you dropped it.

hope this helps!

Large scale extraction is vital to the economy of mining towns is the correct option.

Large scale extraction is very important to the economy of mining towns because the minerals are very valuable which can be sold at high prices which leads to increase in income of a country but this large extraction also disturbs the surrounding environment.

So we can conclude that Large scale extraction is vital to the economy of mining towns is the right option.

Learn more about mineral here: https://brainly.com/question/5039704

Answer:

Large scale extraction is vital to the economy of mining towns is right

Explanation:

Answer:

add 5 each number

Answer:

Increase by 5 each time.

Explanation:

Answer:

2.72 km

Explanation:

(12.33 km)/ 1 hr * (1 hr)/ 60 min

0.2055 km/ min

distance=rate * time (assuming v is constant,

a=0)

(0.2055 km/ min)*(13.22 min)

2.72 km OR 2716.71 m

Answer:Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P." Neutrons have no electrical charge.

Answer:

C

Explanation:

the correct answer is C