if a car is taken from the garage driven for 100km before returning to the garage after 2 hours what is it average speed?

Answers

Answer 1

Answer:

50km/h

Explanation:

Average Speed = Distance/Time

100km/2h = 50km/h


Related Questions

A gas in a sealed container has a pressure of 50 kPa at 27°C. What will the pressure of the gas be if the temperature rises to 87°C?

Answers

Answer:

the final pressure of the gas is 60 kPa.

Explanation:

Given;

initial pressure of the gas, P₁ = 50 kPa = 50,000 Pa

initial temperature of the gas, T₁ = 27⁰ C = 27 + 273 = 300 k

final temperature of the gas, T₂ = 87⁰ C = 87 + 273 = 360 K

Let the final pressure of the gas = P₂

Apply pressure law;

[tex]\frac{P_1}{T_1} = \frac{P_2}{T_2} \\\\P_2 = \frac{P_1T_2}{T_1} = \frac{50,000 \times 360}{300} = 60,000 \ Pa = 60 \ kPa[/tex]

Therefore, the final pressure of the gas is 60 kPa.

Convection currents are the rising and sinking of warmer and cooler materials due to their densities. Why does the warmer magma do this?

Answers

Answer:

See Explanation

Explanation:

Convection is a mode of heat transfer which involves the actual movement of the particles of a substance.

The hotter particles move upwards and are replaced by the cooler particles, thus a convection current is set up. This is due to the fact that cooler particles are denser than warmer particles.

Warm magma is found far beneath the earth. It rises to the surface due to convection current thereby leading to volcanos. Volcanic eruptions result from convection currents that occur underground.

Which one of the following is an example of a solution?
a. Sand particles in water
b. Orange Squash
c. Vinegar
d. Paint

Answers

Answer:

it is maybe A but i'm not 100% sure

Explanation:

its the only one that is mixed

Which term is the product of force and distance?

power
work
net force
acceleration

Answers

Answer:

work

Explanation:

it is a scalar quantity. it is equal to product of force and distance if the direction of motion is in direction of force in straight line

Answer:

work

Explanation:

:>)

4) Describa una situación en la cual un cuerpo se encuentre en reposo para un observador, y en movimiento para otro.

Answers

Answer:

Rest and motion are the relative terms.

Explanation:

When the position of the object does not change with respect to time, the object is said to be at rest.

When the position of the object changes with respect to time, the object said to be in motion.

let there is a tree, the tree is at rest with respect to the person which is standing near by the tree.

But when the person is in outer space and able to see the tree, the tree is in motion as the earth is in  motion.

A person sitting in the train which is moving is at rest when observed by the other person sitting in the train but he is in motion with respect to a person which is standing on the platform.  

Which of the following statements is NOT correct?
A. If the forces on an object are balanced, then the object can be at a constant speed.
B. If the forces on an object are balanced, then the object can be at rest.
C. If the forces on an object are unbalanced, then the object can be accelerating.
D. If the forces on an object are unbalanced, then the object can be at rest.

Answers

The answer is
D:if the

9) What is the temperature of 5 moles of nitrogen at 1 atm in a 2 liter container?*


- 4.88 K
- 0.0328 K
- 0.41 K.
- 0.0164 K

Answers

Answer:

4.88 K.

Explanation:

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

Number of mole (n) = 5 moles

Pressure (P) = 1 atm

Volume (V) = 2 L

Gas constant (R) = 0.082 atm.L/Kmol

Temperature (T) =?

The temperature of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

1 × 2 = 5 × 0.082 × T

2 = 0.41 × T

Divide both side by 0.41

T = 2 / 0.41

T = 4.88 K

Therefore, the temperature of the gas is 4.88 K.

Un objeto de masa de 250 g es arrastrado sobre una superficie con una velocidad de 25 m/s. Determina la energía cinética que pose

Answers

Contenido:

→  Energía cinética

Ecuación

[tex]\large {\boxed {\bf E_c = \cfrac{mv^2}{2} }}[/tex]

                                               

La energía cinética de la masa se da en kilogramos, por lo que tendremos que convertir gramos a kilogramos...

[tex]\large {\text {$ \blue {\sf 250 g \rightarrow 0,25 kg }$}}[/tex]

Entonces tendremos:

[tex]\large {\text {$ \purple {\sf E_c = \cfrac{ 0,25 \cdot 25 }{2} \rightarrow \quad \cfrac{6,25}{2} = 3,125} $}}[/tex]

[tex]\large {\boxed {\boxed {\boxed {\bf E_c = 3,125 }}}}[/tex]

Please help ASAP
у.
B
C
Position (m)
A А
0
1
2
3
4
5
6
7
8
9
10
11
12
Time (s)
The graph describes the motion of an object.
The object moves with
from A to B. It
from B to C. It moves
from C to D.

Answers

Answer:

a10

Explanation:

Resolver el siguiente problema usando los pasos de Pólya y la estrategia razón, proporción y porcentajes De los 240 viajeros que ocupan un avión, el 30% son asiáticos, el 15% africanos, el 25% americanos y el resto europeos. a) ¿Cuántos europeos viajan en el avión? b) ¿Cuál es el total de asiáticos y americanos que viajan en el avión? c) ¿Cuál es la razón de viajeros africanos a viajeros americanos?

Answers

Answer:

a) 72 europeos viajan en el avión, b) 132 pasajeros viajan en el avión, c) Hay una proporción de 3 africanos a 5 americanos en el avión.

Explanation:

a) Si 30 % son asiáticos, 15 % africanos y 25 % americanos, entonces 30 % son europeos. La cantidad de europeos en el avión es:

[tex]x = 0.3\cdot (240)[/tex]

[tex]x = 72[/tex]

72 europeos viajan en el avión.

b) El total de asiáticos y americanos en el avión se determina mediante la siguiente expresión:

[tex]x = (0.3 + 0.25)\cdot (240)[/tex]

[tex]x = 132[/tex]

132 pasajeros viajan en el avión.

c) En primer lugar, se calculan los números de africanos y americanos en el avión:

Africanos

[tex]x_{1} = 0.15\cdot (240)[/tex]

[tex]x_{1} = 36[/tex]

Americanos

[tex]x_{2} = 0.25\cdot (240)[/tex]

[tex]x_{2} = 60[/tex]

Y la razón de viajeros africanos a viajeros americanos es:

[tex]r = \frac{r_{1}}{r_{2}}[/tex]

[tex]r = \frac{36}{60}[/tex]

[tex]r = \frac{3}{5}[/tex]

Hay una proporción de 3 africanos a 5 americanos en el avión.

Select the correct answer. A truck moves 60 kilometers east from point A to point B. At point B, it turns back west and stops 15 kilometers away from point A. What are the total distance and total displacement of the truck? A. The total distance is 105 kilometers, and the total displacement is 15 kilometers east. B. The total distance is 105 kilometers, and the total displacement is 45 kilometers east. C. The total distance is 60 kilometers, and the total displacement is 60 kilometers east. D. The total distance is 60 kilometers, and the total displacement is 45 kilometers east. E. The total distance is 105 kilometers, and the total displacement is 75 kilometers east.

Answers

Answer:

Option a

Explanation:

A certain capacitor, in series with a resistor, is being charged. At the end of 25 ms its charge is half the final value. The time constant for the process is about:

Answers

Answer:

  τ = 36 10⁻³ s

Explanation:

The charge of a circuit Rc is given by the expression

          q = q₀ (1 - [tex]e^{-t/ \tau }[/tex])

          q / q₀ = 1 - e^{-t/  \tau }

in this exercise they indicate that

          q / q₀ = ½

for a time t = 25 10⁻³ s

we substitute

          ½ = 1 - [tex]e^{- 25 \ 10^{-3} / \tau}[/tex]

          e^{- 25 \ 10^{-3} /  \tau} =  1 -½

         - 25 10⁻³ /τ = ln 0.5

         -25 10⁻³ / ln 0.5 = τ

         τ = 36 10⁻³ s

A cyclist is taking part in the Tour de France, which is a bicycle race that takes place every year.
a Two forces acting on the cyclist are weight and reaction. Name two other forces acting on him
as he cycles along.

Answers

Solve the following word problems.
1. The ratio of red marbles and blue marbles that Carlo has is 8: 3. When he
exchanged 35 red marbles for 20 blue marbles from his brother, he was left with
equal number of red and blue marbles.
How many red and blue marbles did he have at the beginning
How many red and blue marbles did he have now

Whats this i give 13 points

Answers

Answer:

pretty sure its A hope this helped

As a train starts from rest then accelerates down the track, coming toward an observer faster and faster, the frequency of the sound waves coming toward the observer will be

Answers

Answer:

Increase in frequency constantly

Explanation:

This concept can be explained by Doppler shift as per which any form of disturbance spreads out spherically from its point of origin. If the source of sound wave is stationary and the receiver is also stationary, then the frequency remains the same but if the source is moving, then the disturbance caused is closer on one side and distant on the other side thereby producing shorter wavelength in direction the source is moving and longer wavelength in the opposite direction.

An astronaut wearing a space suit floats in the middle of a room with no air (i.e. vacuum) and is 20.0 m from any wall, the floor and the ceiling. She needs to get to the door so she can go with her NASA friends to eat a hamburger. She has only a book and a pencil in her possession. She cannot call for help since something is interfering with her signal. Under these conditions, how can she get to the door

Answers

Answer:

To get to the door, the astronaut has to throw the book and pencil away from her in the direction opposite to that of the door.

Explanation:

Since no net force acts on her and she floats in the center of the room, if she throws the book and pencil away from her, since both her, the book and the pencil have an initial momentum p = 0, and since momentum is conserved, then after throwing the book and pencil away from her, the momentum of both her, the book and pencil is still zero.

The astronaut will thus develop a momentum which is opposite to that of the book and pencil. This is shown below.

Since p = p' where p = initial momentum of astronaut, book and pencil = 0 and p' = final momentum of astronaut, book and pencil = mv + m'v' where m = mass of book and pencil, v = velocity of book and pencil, m' = mass of astronaut and v' = velocity of astronaut.

So, p = p'

0 = mv + m'v'

mv = -m'v' where mv = momentum of book and pencil and m'v' = momentum of astronaut

v' = -mv/m

We see that the astronaut develops a momentum opposite in direction but equal in magnitude to that of the book and pencil and will thus develop a velocity opposite to that of the book and pencil.

Thus, to get to the door, the astronaut has to throw the book and pencil away from her in the direction opposite to that of the door.

A spiral spring is compressed by 0.1cm. calculate the elastic potential energy in the spring if the stiffness of the spring is 100Nm^1

Answers

Answer:

[tex]E=5\times 10^{-5}\ J[/tex]

Explanation:

Given that,

A spring is compressed by 0.1 cm or 0.001 m

The spring constant of the spring, k = 100 N/m

The elastic potential energy in the spring is given by :

[tex]E=\dfrac{1}{2}kx^2\\\\E=\dfrac{1}{2}\times 100\times 0.001^2\\\\E=5\times 10^{-5}\ J[/tex]

So, the elastic potential energy of the spring is equal to [tex]5\times 10^{-5}\ J[/tex].

If an object's surface area is smaller does it create more or less pressure?

Answers

Answer:

When the surface area is less the pressure exerted by the object is more. However, when the surface area is large, the points of contact between the object and the pressure. Thus, less pressure is exerted by the body on the surface.

Explanation:

hope it helps

If the surface area of an object is smaller, it will create more pressure

An object's surface area is inversely proportional to its pressure.

This can be demonstrated from the formula below

Pressure:

The can be defined as the perpendicular force acting per unit area. the S.I  unit of pressure is N/m².

Formula:P = F/A.................. Equation 1

Where: P = Pressure of the objectF = Force acting on the objectA = Surface area of the object.

In View of the above equation, It can be seen that as the surface area of an object reduces the pressure created by the object will increase.

Hence, If the surface area of an object is smaller, it will create more pressure

Learn more about pressure here: https://brainly.com/question/25736513

How efficient is a pulley system if an operator has to pull 2.5m of rope to lift a 250 N pail of water a distance of 4.5 m?

Answers

Answer:

the pulley system is very efficient

Explanation:

Given;

load, L  = 250 N

distance moved by the load, a = 4.5 m

distance moved by the effort, e = 2.5 m

let the force or effort applied = F

Apply the principle of conservation of energy;

F x e = L x a

F = (L x a) / e

F = (250 x 4.5) / 2.5

F = 450 N

The efficient of the pulley system;

E = Output force / Input force

E = (450 x 2.5) / (250 x 4.5)

E = 1 = 100%

Therefore, the pulley system is very efficient

What are three methods of water conservation that we can do to protect our aquifers, watersheds, and ground water?

Answers

Answer:

• Go Native. Use native plants in your landscape. ...

• Reduce Chemical Use. Use fewer chemicals around your home and yard, and make sure to dispose of them properly - don't dump them on the ground!

• Manage Waste. ...

Explanation:

There are some easy ways to conserve water to help protect our aquifers, watersheds, and ground water. First, we can all conserve water, by not running the water while we brush our teeth and making sure we fix all leaking or dripping faucets. Another was to conserve water is to collect rain water to use to water your plants. Speaking of plants, you can also plant more zeroscape type landscapes that require less water. We can also update our shower heads and toilets to be low-flow and more efficient. Can't afford a new toilet? Simply add a brick to your tank and this will cut down on the water used for every flush.

Reduce, Reuse, and Recycle
Reduce the amount of "stuff" you use and reuse what you can. Recycle paper, plastic, cardboard, glass, aluminum and other materials.
Natural Alternatives
Use all natural/nontoxic household cleaners whenever possible. Materials such as lemon juice, baking soda, and vinegar make great cleaning products, are inexpensive, and environmentally-friendly.
Learn and Do More!
Get involved in water education! Learn more about groundwater and share your knowledge with others.

Convert 162 km/h into m/s.

Answers

Answer:

45 m/s

Explanation:

162 / 3.6 = 45 m/s

Divide by 3.6 to convert km/h to m/s.

Water can exist in three states: solid (ice), liquid and gas (steam).In which state, or states, is the motion of the molecules only vibrational?

Answers

Answer:

solid

Explanation:

Answer:

In the solid state, the motion of molecules is only vibrational, because solids are very tightly packed together and cannot move other than by vibrating

An airplane is .68 Kilometers long. How many Millimeters long is the plane?
a. 680 mm
b. 6,800 mm
c. 68,000 mm
d. 680,000 mm

Answers

Given : Airplane is 0.68 kilometers long

We know that :

  1 km = 1000 meters

⊕   1 m = 1000 millimeters

⇒   1 km = (1000 × 1000) millimeters

⇒   0.68 km = (0.68 × 1000 × 1000) millimeters

⇒   0.68 km = 680,000 millimeters

Answer: Airplane is 680,000 millimeters long

If an airplane is 0.68 Kilometers long, the length of the airplane in millimeters would be 680000 Millimeters, therefore the correct answer is option D.

What is a unit of measurement?

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind.

As given in the problem, If an airplane is 0.68 Kilometers long, then we have to find out the length of the airplane in millimeters,

1 kilometers = 1000 meters

1 meter = 100 centimeters

1 centimeters = 10 millieters

As given the length of the plane is 0.68 Kilometers.

0.68 kilometers = 680 meters

0.68 kilometers = 680×100 centimeters

0.68 kilometers = 680×100×10  millimeters

                           = 680,000 millimeters

Thus, the correct answer is option C.

To learn more about the unit of measurement from here, refer to the link;

brainly.com/question/12629581

#SPJ2

HELP ME ILL MARK YOU THE BRAINLIEST

Answers

Option C: Later in the day, less power is developed in lifting each box

Answer:

Later in the day, less power is developed in lifting each box.

power= workdone÷time

a petrol engine raises 200kg of water in well from a depth of 7m in 6s show that the engine is developed about 2.33 kw of power​

Answers

Answer:

P = 2.33 kW

Explanation:

Given that,

Mass, m = 200 kg

It is raises in the well from a depth of 7 m in 6 s.

W e know that,

Power = work done/time

Put all the values,

[tex]P=\dfrac{mgh}{t}\\\\P=\dfrac{200\times 10\times 7}{6}\\\\P=2333.3\ W[/tex]

or

P = 2.33 kW

Hence, the power of the engine is 2.33 kW.


Which statement best compares potential and kinetic energy?
O Objects always have more potential energy than kinetic energy.
O Kinetic energy increases and potential energy decreases when the velocity of an object increases.
O Only potential energy decreases when an object's height increases.
O Objects always have more kinetic energy than potential energy.
Mark this and return
Save and Exit
Next
Submit

Answers

Answer:

B . Kinetic energy increases and potential energy decreases when the velocity of an object increases.

Explanation:

The statement with best compares potential energy and kinetic energy is that only kinetic energy increases when the velocity of the object increases.

Which circuit component usually acts as a switch or amplifier?
O A. A transistor
O B. A capacitor
O C. A resistor
D. A battery

Answers

Answer:

The answer is A. A transistor

Answer:

a transistor

Explanation:

A P E X

the value of 'g' changes as per its position on the earth's surface.justify the statement​

Answers

Answer:

PLEASE MARK ME AS A BRAINLIEST

Explanation:

There are slight variations in the value of g about earth's surface. These variations result from the varying density of the geologic structures below each specific surface location. They also result from the fact that the earth is not truly spherical; the earth's surface is further from its center at the equator than it is at the poles. This would result in larger g values at the poles. As one proceeds further from earth's surface - say into a location of orbit about the earth - the value of g changes still.

4. A cell membrane contains all of the following EXCEPT:*
O glycolipids
phospholipids
sphingolipids
steroids
none of the above

Answers

Answer:

The correct answer is - none of the above.

Explanation:

Cell membranes or plasma membranes of the cell are composed mainly of fatty-acid-based lipids and proteins. Membrane lipids are of two types majorly, glucolipids, phospholipids, and sterols (generally cholesterol).

Sphingolipids are also a structural component of the cell membrane that helps in segregation into distinct membrane domains. Glycolipids are present on the surface of the plasma membrane.

HELP PLSSS I HAVE AN EXAM MONDAY AND I THINK THIS IS GONNA BE ON ITTTT
A fish is at the western bank of a river that is 64 m wide and has a current with a velocity of 0.90 m/s [S]. The fish swims directly across the river going due east. The fish can swim at a speed of 0.2 m/s.

a) How long does it take for the fish to get across the river
b) What is the resulting velocity of the fish
c) When the fish arrives on the opposite bank, how far is it from being at the point directly across from where it started?

The answers are here, please show work on how to get these
a) 3.2 x 10^2
b) 0.9 m/s (S 13 E)
c) 2.9 x 10^2

Answers

Answer:

(a) 3.2 x 10²s

(b) 0.9 m/s (S 13 E)

(c) 2.9 x 10²m

Explanation:

The sketch illustrating the scenario has been attached to this response.

As shown;

The fish swims due east with a velocity [tex]V_{x}[/tex] = 0.2m/s

The river current has a velocity [tex]V_{y}[/tex] due South = 0.9m/s

The resultant of the velocity is V

The width of the river is x = 64m

(a) To calculate how long it took the fish to get across the river, we know that velocity is the rate of change in distance, therefore we can use the relation;

V = [tex]\frac{d}{t}[/tex]      -------------(i)

Where;

V = velocity of the fish = [tex]V_{x}[/tex] = 0.2m/s

d = distance from the start to the end = width of the river = x = 64m

t = time taken to move for that distance

Make t subject of the formula in equation (i);

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

Substitute the values of d and V into the equation;

t = [tex]\frac{64m}{0.2m/s}[/tex]

t = 320 s

t = 3.20 x 10²s

Therefore, the time taken for the fish to get across the river is 3.20 x 10²s

(b) The resulting vector of the fish is V whose magnitude is the algebraic sum of vectors  [tex]V_{x}[/tex] and  [tex]V_{y}[/tex], and direction is given by θ. i.e

The magnitude of the resulting vector is;

|V| = [tex]\sqrt{(V_x)^2 + (V_y)^2}[/tex]

|V| = [tex]\sqrt{(0.2)^2 + (0.9)^2}[/tex]

|V| = [tex]\sqrt{(0.04) + (0.81)}[/tex]

|V| = [tex]\sqrt{(0.85)}[/tex]

|V| = 0.92m/s

|V| ≅ 0.9m/s

The direction of the resulting vector θ and is given by;

tan θ = [tex]\frac{V_y}{V_x}[/tex]

tan θ = [tex]\frac{0.9}{0.2}[/tex]

tan θ = 4.5

θ = tan⁻¹ ( 4.5)

θ = 77.47° South of East.

θ  ≈ 77.5° South of East.

Subtracting θ = 77.5° from 90° gives its value East of South

i.e

90 - 77.5 = 12.5° East of South

This can also be written as S12.5°E

Approximating to the nearest whole number gives S 13 E

Therefore, the resulting velocity of the fish is 0.9m/s in the direction S13°E

(c) When the fish arrives on the opposite bank, its distance from being at the point directly across from where it started is the product of the velocity of the river current and the time taken by the fish to get across the river. This point is equivalent to k as shown in the diagram.

Therefore;

distance = velocity of river current x time taken

distance = 0.9m/s x 3.20 x 10²s

distance = 2.88 x 10²m

distance ≅ 2.9 x 10²m

Notice that the velocity of the river current is used since that's the velocity of the fish on the y-axis.

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Devon has $200 in his savings account. He has to withdraw $8 every week to pay his friend back for some video games. The video games cost $88. How many weeks will it take to pay his friend back? How much will Devon have left in his savings account? i need to know the answer We use information from which two sources in order to determine whether an author uses a word or phrase differently than we use it now?A) a dictionary and a thesaurusB) a usage dictionary and a dictionaryC) the reading itself and a thesaurusD) the reading itself and a dictionary possibilities for me in future The first 10 Amendments to the Constitution are known as the Bill of Rights. Which TWO amendments of the Bill of Rights are the most important to you personally? Why? The terminal side of in standard position contains the point (3, 0). Find the exact values of the six trigonometric functions of Do you believe that our lives are dictated entirely by fate or fortune if you know any of these please help me What is an allele?A. a DNA sequenceB. a form of a geneC. a hairstyleD. a physical trait Assuming the oligopeptide alfahelicks forms one continous a helix the glutamate residue is hydrogen bonded to:___.a. leucine.b. cysteine.c. serine.d. lysinee. isoleucine. Explain yarn as the second production stage of any textile What are 4 producers of the boreal forest Your brother was setting up the tent whencuts his finger with the pole which measure of central tendency best describes the situation, the ages of 7 people who auditioned for a role in a play: 17,20,22,12,15,12,21 The show must go on, How does the rejection letter from the museum affect Tessa ?A) Tessa dont have an alternative plan and is upset by this setback.B) Tessa is unconcerned that she wont have the final scene she had planned. C) Tessa is stunned that the museum has rejected her request. D) Tessa doesnt let the rejection stand in her way of achieving her goal for the finale. A factory can make 3,848 pencils in one hour. Which is the best estimate of how many pencils can be made in 4 hours? *A 160,000 pencilsB 16,000 pencilsC 12,000 pencilsD 1,600 markers What does the point (200,90) represent? Given that the growing opinion root tip has 16 chromosomes in each cell ( normally). During the cell cycle, while the cell is growing and dividing, specify how many chromosomes will the cell have at the G1 phase? and how many chromosomes will it have after the S phase? Explain your answer with a reason/evidence statement when potassium chloride is dissolved in water *a)heat is given offb)heat is taken inc)temperature stays same Which statement best describes the similarity betweenthese excerpts?Both men place blame upon the women they love.Both men express hope that the women will recover.O Both men give dying tributes to the women theylove.Both men criticize society for denying them theirloves.