The speed of a car cruising along a highway was 90.0km h^-1. What is this value in meters per second?

Answers

Answer 1

Answer:

25 m/s

Explanation:

1 km/h = .277778 m/s, so 90 x .277778 = 25


Related Questions

pls help me solve this



Answers

Answer:

a) The uniform velocity travelled by the car is 10 meters per second.

(Point b has been erased by the user)

c) The distance travelled by the car with uniform velocity is 100 meters.

Explanation:

a) Calculate the uniform velocity travelled by the car:

The uniform velocity is the final velocity ([tex]v[/tex]), in meters per second, of the the uniform accelerated stage:

[tex]v = v_{o} + a\cdot t[/tex] (1)

Where:

[tex]v_{o}[/tex] - Initial velocity, in meters per second.

[tex]a[/tex] - Acceleration, in meters per square second.

[tex]t[/tex] - Time, in seconds.

If we know that [tex]v_{o} = 0\,\frac{m}{s}[/tex], [tex]a = 2\,\frac{m}{s^{2}}[/tex] and [tex]t = 5\,s[/tex], then the uniform velocity is:

[tex]v = 0\,\frac{m}{s} + \left(2\,\frac{m}{s^{2}} \right)\cdot (5\,s)[/tex]

[tex]v = 10\,\frac{m}{s}[/tex]

The uniform velocity travelled by the car is 10 meters per second.

(Point b has been erased by the user)

c) The distance travelled by the car ([tex]\Delta x[/tex]), in meters, with uniform velocity is calculated by the following kinematic expression:

[tex]\Delta x = v\cdot t[/tex] (2)

If we know that [tex]v = 10\,\frac{m}{s}[/tex] and [tex]t = 10\,s[/tex], then the distance travelled is:

[tex]\Delta x = \left(10\,\frac{m}{s} \right)\cdot (10\,s)[/tex]

[tex]\Delta x = 100\,m[/tex]

The distance travelled by the car with uniform velocity is 100 meters.

Which branch of science may be facing a "crisis of credibility"? experimental science computational science theoretical science interpretive science

Answers

Answer: Computational science

Explanation:

When something is going through a credibility crisis, it means that the data and results that it gives out are not reliable.

This seems to be the case with computational science as some scientists argue that it is not providing them with reliable information. Some other scientists have offered solutions to this by stating that for computational science to work, it needs access to big data so that it can run relevant analysis on the data to produce reliable results.

Answer:

computational science

Explanation:

big brain please give brainlist

The diagram represents Earth in its orbit around the Sun and the Moon (M) in different positions in its orbit around Earth. Letters A through D represent four positions of Earth in its orbit. Earth is closest to the Sun near position D and farthest from the Sun near position B. Identify the lettered position of Earth and the Moon when this full moon phase can be observed, and state the name of the eclipse that could occur at this position.

Answers

Answer:

Option (D), lunar eclipse

Explanation:

When the moon comes between the earth and sun, the lunar eclipse occurs, so D is the lunar eclipse. It is full moon day.

C is the position when there is new moon day and it is solar eclipse.

So, option (D) is correct.

Where does the food you eat end up in your body?
O
A. The food molecules enter the individual cells all over your body.
O
B. The food gets absorbed into the tissues and organs that need it.
C. The biggest user of the energy from food in your body is your heart.
0
D. The food molecules end up in the blood after leaving the digestive system.

Answers

Explanation:

the small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use. Special cells help absorbed nutrients cross the intestinal lining into your bloodstream.

Select the correct answer
If the resistance in a circuit remains constant, what happens to the electric power when the current increases?
OA. The power will increase.
OB.
The power will decrease,
OC. There will be no power.
OD
The current does not affect the power,
Reset
Next

Answers

Answer :

[tex]\large\mathrm{A. Power\:\: will \:\:Increase }[/tex]

Explanation :

We know that,

[tex]\large \mathrm{ \boxed{P = I²R}}[/tex]

where,

P = electric powerR = resistanceI = electric current

And when resistance is constant, the power of the circuit will change proportionally with the change in electric current. therefore, if current increases then the electric power of the circuit will increase too.

[tex]\large\mathfrak{{\pmb{\underline{\orange{hope \: \: i t \: \: helps \: \: you}}{\orange{.....}}}}}[/tex]

a string 2m long used to whirl a 200gm stone in horizontal circle at a speed of 2m/s . find the tension in the string​

Answers

Answer:

Explanation:

First off, we need the mass in kg and it's in g so we have to convert it. Then we can do the problem. 200 g = .200 kg. Moving on.

The equation used to find the tension in the string is the same one we use to find the centripetal force, because the tension is what is upplying the centripetal force needed to keep the stone moving in a circular manner. The formula for that is

[tex]F_c=T=\frac{mv^2}{r}[/tex] where ma is the mass in kg, v is the velocity in m/s, and r is the radius of the circle about which the stone spins in meters.

Filling in:

[tex]T=\frac{(.200)(2)^2}{2}[/tex] which gives us

T = .4 N

Developed countries typically have _______.

Answers

Answer:

Good government

Explanation:

Many people will think its natural resources but its not. Africa is a proof. They have resources but leadership is what makes most of their countries 3rd world. #BADGOVERNANCE

What's the meaning of longitudinal?

Answers

Answer:

A longitudinal study is a research design that involves repeated observations of the same variables over short or long periods of time. It is often a type of observational study, although they can also be structured as longitudinal randomized experiments.

Explanation:

The table describes the properties of four compounds.



Which compounds are most likely ionic?

compounds A and B
compounds B and C
compounds C and D
compounds D and A

Answers

Answer:

Last option

Explanation:

a 10 kg box is pulled across an ice rink for a distance of 50m. it is pulled with a constant force of 10 N on a rope angled at 60° to the horizontal. How much work is done on the box? (A) 50 ) (B) 100 ) (C) 250 ) (D) 500)​

Answers

Answer:

(C) 250

Explanation:

Given the following data;

Mass = 10 kg

Distance = 50 m

Force applied = 10 N

Angle = 60°

To find the work done on the box, we would first of all find the horizontal component of the force applied.

[tex] Horizontal force, Fx = mgCosd[/tex]

Where;

Fx represents the horizontal force.

m is the mass of an object.

g is the acceleration due to gravity.

d is the angle of inclination (theta).

mg = weight = 10 N

Substituting into the equation, we have;

[tex] Fx = 10 * Cos60 [/tex]

[tex] Fx = 125 * 0.5 [/tex]

Fx = 5 Newton

Next, we find the work done.

Mathematically, workdone is given by the formula;

[tex] Workdone = force * distance[/tex]

Substituting into the formula, we have;

[tex] Workdone = 5 * 50 [/tex]

Workdone = 250 Nm

a ball of mass 0.2 kg is dropped from a height of 20m on impact to the ground it loses in 30 joule of energy calculate the height it reaches on rebound​

Answers

Answer:

5 m

Explanation:

We'll begin by calculating the original potential energy. This can be obtained as follow:

Mass (m) = 0.2 Kg

Height (h) = 20 m

Acceleration due to gravity (g) = 10 m/s²

Energy (E₀) =?

E₀ = mgh

E₀ = 0.2 × 10 × 20

E₀ = 40 J

Next, we shall determine the new energy of the ball.

Energy (E₀) = 40 J

Energy lost (Eₗ) = 30 J

New energy (E) =?

E = E₀ – Eₗ

E = 40 – 30

E = 10 J

Finally, we shall determine height of the ball on rebound. This can be obtained as follow:

New energy (E) = 10 J

Mass (m) = 0.2 Kg

Acceleration due to gravity (g) = 10 m/s²

Height (h) =?

E = mgh

10 = 0.2 × 10 × h

10 = 2 × h

Divide both side by 2

h= 10 / 2

h = 5 m

Thus, the height of the ball on rebound is 5 m

A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 2.1 m. The maximum angle the string makes with the vertical as the pendulum swings is 30°. What is the speed of the object at the lowest point in its trajectory?

Answers

Answer:

The speed of the object at the lowest point in its trajectory is:

[tex]v=2.34\: m/s[/tex]

Explanation:

We can use the conservation of energy between the maximum point of swing and the lowest point of the pendulum.

[tex]P=K[/tex]

[tex]mgh=\frac{1}{2}mv^{2}[/tex] (1)

Where:

h is the height of the object at 30° with the vertical.v is the speed at the lowest point.

We can find h using trigonometry.

[tex]h=L-Lcos(30)=L(1-cos(30))[/tex]

[tex]h=2.1(1-cos(30))=0.28\: m[/tex]

Now, using equation (1) we can find v.

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

[tex]2gh=v^{2}[/tex]

[tex]v=\sqrt{2gh}[/tex]

[tex]v=\sqrt{2(9.81)(0.28)}[/tex]

[tex]v=2.34\: m/s[/tex]

I hope it helps you!

Can someone please help with part c)

Answers

Energy released ,

[tex] = 3.789 \times {10}^{ - 12} [/tex] J

what is the name of part of the iss which provides it with electricity

Answers

They use solar panels which turn solar cells into electricity

uses of semiconductor​

Answers

Answer:

Many digital consumer products in everyday life such as mobile phones / smartphones, digital cameras, televisions, washing machines, refrigerators and LED bulbs also use semiconductors.

There are 8000 turns on the primary coil and 200 turns on the secondary coil of the transformer. The primary coil is connectd to a 240 v mains supply, suggest whether this transformer is a step up or step down transformer

Answers

Answer: Step down

Explanation:

Given

No of turns on the primary coil is [tex]N_p=8000[/tex]

No of turns on the secondary coil is [tex]N_s=200[/tex]

Primary is connected to the voltage [tex]V_p=240\ V[/tex]

According to the turns rule

[tex]\Rightarrow \dfrac{N_p}{N_s}=\dfrac{V_p}{V_s}\\\\\Rightarrow \dfrac{8000}{200}=\dfrac{240}{V_s}\\\\\Rightarrow V_s=\dfrac{240}{40}\\\\\Rightarrow V_s=6\ V[/tex]

As the voltage drops from 240 V to 6 V. Therefore it is a step-down transformer.

A student is building an electric circuit.Which material should she choose for the wires,and why?

Answers

If i understand your question clearly, The best choice in most scenarios is  copper.

Why?

Its due to copper's high conductive properties, its abundance, its low price compared to its fellow metal conductors, its ductile property, thermal resistance and immunity to oxidation ( rusting ).

Though Silver surpasses copper in conductivity, copper is shown to be more notable than its fellow conductors.

two electrons (each with the charge of 1.6 x 10^ -19 c) are seperated by a distance of 5.4 x 10^ -5 c what is the electric force pushing them apart?

Answers

The electric force between two charges is:

F = (9 x 10⁹) Q₁ Q₂ / D²

F is the force, in Newtons

Q₁ and Q₂ are the two charges, in Coulombs

D is the distance between them, in meters

I'm going to assume that the first little 'c' in the question stands for "Coulombs", and the second little 'c' stands for "centimeters".  And now, I'll proceed to answer the question that I've just invented.

For these two electrons:

F = (9 x 10⁹) (1.6 x 10⁻¹⁹) (1.6 x 10⁻¹⁹) / (5.4 x 10⁻⁷)²

F = (9 x 1.6 x 1.6 x 10⁻²⁹) / (5.4² x 10⁻¹⁴)

F = (23.04 / 29.16) x 10⁻¹⁵

F = 7.9 x 10⁻¹⁶ of a Newton

EACH electron feels that same force, pushing it away from the other electron.

7. A circuit has a resistance of 680 ohm and a current of 0.025 A. What's the voltage of the circuit?
O A. 17 V
O B.27.2 V
O C. 24.6 V
O D. 12 V

Answers

Answer:

A. 17V

Explanation:

V = IR

680Ω × 0.025A = 17V

Answer:
The answer is A.

Most ozone is found in a region of Earth’s
atmosphere between 10 and 20 miles above
Earth’s surface. This temperature zone of the
atmosphere is known as the

(1) thermosphere (3) stratosphere
(2) mesosphere (4) troposphere

Answers

Answer:

It’s stratosphere

Explanation:

Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

What is ozone?

Ozone is an allotrope of oxygen. It is blue in color and it is found in Earth's atmosphere. It protects the Earth from ultraviolet rays from the Sun.

Most ozone is found in the following layer of the Earth's atmosphere:

The ozone subcaste is centered at an altitude between 10-15 country miles (15-25 km). Close to 90% of the ozone found in the atmosphere is in the stratosphere. Ozone that is found in this region is about 10 parts per million by volume (ppmv) to the troposphere's 0.04 ppmv.

Therefore, we have determined that Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

Learn more about ozone here: https://brainly.com/question/26254261

#SPJ2

I am confused and need help with the question above??

Answers

It’s b it’s going clockwise


A car has a kinetic energy of 103kJ.
The speed of the car is 13.1 m/s.
Calculate the mass of the car.
Give your answer to 2 significant figures.

Answers

Answer: 1200kg

Explanation:

KE = (1/2)mv^2

103kJ = 103000J

103000J = (1/2) * m * (13.1m/s)^2

Solve for m

A car has a kinetic energy of 103kJ, and the speed of the car is 13.1 m/s,then the mass of the car would have been 1200 kilograms.

What is mechanical energy?

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.

A car has a kinetic energy of 103 kJ. The speed of the car is 13.1 m/s,

The kinetic energy of the car = 1/2 × mass × velocity

                                     103000 =0.5 × mass × (13.1) ²

The mass of the car = 1200 Kilogram

Thus, if a car has a kinetic energy of 103kJ, and the speed of the car is 13.1 m/s,then the mass of the car would have been 1200 kilograms.

To learn more about mechanical energy, refer to the link;

https://brainly.com/question/2409175

#SPJ5

Amelia is doing an experiment in which she is
going to burn various solid chemicals to see the
colors of flames they produce. For this laboratory
experiment, what types of safety precautions
should she take?
tie hair back
leave open flame unattended to get a drink
only burn the amount of chemicals as
directed by the lab procedure
put out the flame with water from the eyewash
station

Answers

Answer:

tie hair back

only burn the amount of chemicals as

directed by the lab procedure

Explanation:

The correct safety precautions for Amelia to take from the options would be to tie her hair back and to only burn the amount of chemicals recommended by the lab procedure.

With her hair left flowing freely, Amelia runs the risk of the hair catching flame while trying to burn the chemicals according to the procedure. Hence, tying her hair up into one neat bunch will limit the risk of it catching fire while working in the lab.

Also, burning less or more than the amount of chemicals recommended by the procedure may be dangerous or hinder Amelia from getting the right result.

Answer:

1,3

Explanation:

just did it

Which best describes the electric field created by a positive charge?

A. It circles clockwise around the charge.
B. It circles counterclockwise around the charge.
C. Its rays point away from the charge.
D. Its rays point toward the charge.

Answers

Answer:

Which best describes the electric field created by a positive charge? ... Its rays point toward the charge.

Explanation:

thank me later

Si se aplic una fuerza de 150N en un área de de 0.4m2¿cual será la preciosa ejercida?

Answers

Answer:

P = 375 Pa

Explanation:

The question says that,"If a force of 150N was applied in an area of ​​0.4m², what will be the precious exerted?"

We have,

Force, F = 150 N

Area, A = ​​0.4m²

We need to find the pressure exerted. We know that,

Pressure = forece/area

So,

[tex]P=\dfrac{150\ N}{0.4\ m^2}\\\\P=375\ Pa[/tex]

So, the required pressure is equal to 375 pa.

Marcel and Jose lifted 50 pounds as many times as they could. Marcel could lift the weight 25 times. Jose could lift the weight 30 times. Marcel and Jose can conclude that __________.
A.
Jose has better muscular endurance than Marcel
B.
Jose has better muscular strength than Marcel
C.
Marcel has better muscular strength than Jose
D.
Marcel has better muscular endurance than Jose

Answers

The answer is A.Jose has better muscular endurance than marcel

Answer:

A

Explanation:

Earth's atmosphere _____. is made mostly of oxygen and carbon dioxide protects the surface from meteoroids and comets reflects most of the sun's heat and light back into space is very thin compared to the moon's atmosphere

Answers

Answer:

protects the surface from meteoroids and comets

Explanation:

Have a nice day

protects the surface from meteoroids and comets

A pendulum is moving 2.0 m/s at the bottom of its swing. How high vertically will it go before it begins to swing back? Group of answer choices 0.4 m 0.1 m 0.2 m 0.8 m 1.0 m

Answers

Answer:

h = 0.2 m

Explanation:

Given that,

A pendulum is moving 2.0 m/s at the bottom of its swing.

We need to find the height high it swing back. Let the height is h.

Using the conservation of energy such that,

[tex]\dfrac{1}{2}mv^2=mgh\\\\h=\dfrac{v^2}{2g}[/tex]

Put all the values,

[tex]h=\dfrac{(2)^2}{2\times 10}\\\\h=0.2\ m[/tex]

So, it will reach to a height of 0.2 m.

If the satellite weighs 1000g, orbits the Earth at an energy of 9.8 × 10 ^ 9j, what is the speed of the satellite?

Answers

Answer:

1.4×10⁵ m/s

Explanation:

Applying,

K = mv²/2............. Equation 1

Where K = Energy of the satellite, m = mass of the satellite, v = speed of the satellite.

make v the subject of the equation

v = √(2K/m)............ Equation 2

From the question,

Given: K = 9.8×10⁹ J, m = 1000 g = 1 kg

Substitute these values into equation 2

v = √(2×9.8×10⁹/1)

v = √(1.96×10¹⁰)

v = 1.4×10⁵ m/s

Tsunamis are fast-moving waves often generated by underwater earthquakes. In the deep ocean their amplitude is barely noticable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. One tsunami, generated off the Aleutian islands in Alaska, had a wavelength of 646 km and traveled a distance of 3630 km in 6.15 h. (a) What was the speed (in m/s) of the wave

Answers

Answer:

v =163.95 m/s

Explanation:

Given that,

The wavelength of wave, [tex]\lambda=646\ km=646\times 10^3\ m[/tex]

Distance covered, [tex]d=3630\ km=3630\times 10^3\ m[/tex]

We need to find the speed of the wave. We know that,

speed = distance/time

So,

[tex]v=\dfrac{3630\times 10^3\ m}{22140\ s}\\\\=163.95\ m/s[/tex]

So, the speed of the wave is equal to 163.95 m/s.

Other Questions
Select the three reasons that the gaming industry is set to grow.A) more colleges offering jobs in game designB) a decrease in the average age of gamersC) an expanding market on mobile phonesD) expanding markets in AsiaE) new accessories that will attract more players How dose globalization affect global warming? Mutations cause _______ to the body shape, size, color, or function of the organism that inherits the mutation.A. a brand new species to pop upB. clonesC. variations A Ferris wheel completes 7 revolutions in 14 minutes. The radius of the Ferris wheel is 30 feet.What is the linear velocity of the Ferris wheel in inches per second?Enter your answer, rounded to the nearest tenth, in the box. Please help me with this question In a school the ratio of boys to girls is 3:2. What percentage of the students are girls? do you know what human rights are? Change into nagativeMohan does his homework Gilmore, Inc., had equity of $135,000 at the beginning of the year. At the end of the year, the company had total assets of $290,000. During the year, the company sold no new equity. Net income for the year was $29,000 and dividends were $3,400. a. What is the sustainable growth rate for the company TRUE OR FALSE? If a speaker picks a speech topic of little personal interest, that is likely to be conveyed through the person's body language. BRAINLIEST FOR CORRECT ANSWER.I drew what option c was for the third answer How many hours did we spend in class?a. 2 hoursb. 3 hoursC. 4 hoursd. 5 hours Find all angles, 0 The Bretton Woods system ended when: Write a paragraph on any one legendary freedom fighter of india. Illustrate with pictures Please help it's urgent! Concentration is the ability to focus and pay give four basic functions of the government Which statement accurately describes how electrical power and voltage arerelated?A. Power decreases as voltage increases.B. Power is always half the amount of voltage.C. Power is always twice the amount of voltage.D. Power increases as voltage increases. Words such as and, but, and or that connects a pair of any kind of sentence parts are _____conjunctions.compoundingcoordinatingsequence