You have two photos of a person walking. One shows the person at the corner of Third and Main streets, the other shows the person at the corner of Tenth and Main streets. There are lampposts at every corner in this town, and the first picture shows it to be 10:32:00 exactly. The second picture shows it to be 10:49:30. You know three facts: (1) All of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross Main in this area are numbered consecutively, with no interruptions. What is the person’s average speed in kilometers per hour?

Answers

Answer 1

Answer:

average speed

= [(10-3)/12 km] / [(49.5-32.0)/60 hour]

= 5*7 / 17.5

= 2 km/h .


Related Questions

A vertical piston-cylinder device initially contains 0.1 m^3 of air at 400 K and 100 kPa. At this initial condition, the piston is resting on a stop. The piston-cylinder device is connected to a supply line with air at 400 K and a pressure of 500 kPa. The valve between the supply line and the piston-cylinder device is opened and is left open until the pressure in the piston-cylinder device reaches 500 kPa. The piston is observed to start moving when the pressure in the cylinder is 200 kPa and the piston continues to rise until it reaches a second stop. At the second stop, the piston-cylinder volume is 0.2 m^3 . The final temperature and pressure in the piston-cylinder device are 440 K and 500 kPa, respectively. Determine the heat transfer to or from the piston-cylinder device for the filling process Determine heat transfer (kJ) during the entire process.

Answers

Answer:

[tex]Q=-38.15kJ[/tex]

Explanation:

From the question we are told that

Piston-cylinder initial Volume of air [tex]v_1=0.1 m^3[/tex]

Piston-cylinder initial temperature [tex]T_1=400k[/tex]

Piston-cylinder initial pressure [tex]P_1= 100kpa[/tex]

Supply line temperature[tex]T_s=400k[/tex]

Supply line pressure [tex]P_s= 500kpa[/tex]

Valve  final pressure [tex]P_v=500kpa[/tex]

Piston movement pressure [tex]P_m=200kpa[/tex]

Piston-cylinder final Volume of air[tex]v_2=0.2 m^3[/tex]

Piston-cylinder final temperature [tex]T_2=440k[/tex]

Piston-cylinder final pressure [tex]P_2= 500kpa[/tex]

Generally the  equation for conservation of mass is mathematically given by

[tex]Q=m_2 \mu_2-m_1 \mu_1 +W-(m_2-m_1)h[/tex]

where

Initial moment

[tex]m_1=\frac{p_1 V_1}{RT_1}[/tex]

[tex]m_1=\frac{100*0.1}{0.287*400}[/tex]

[tex]m_1=8.7*10^-^2kg[/tex]

Final moment

[tex]m_2=\frac{p_2 V_2}{RT_2}[/tex]

[tex]m_1=\frac{500*0.3}{0.287*440}[/tex]

[tex]m_1=79*10^{-2}kg[/tex]

Work done by Piston movement pressure

[tex]W=Pd[/tex]

[tex]W=P(v_2-v_1)[/tex]

[tex]W=200(0.2-0.1))[/tex]

[tex]W=20000J[/tex]

Heat function

[tex]h=cT_1[/tex]

[tex]h=1.005(400)[/tex]

[tex]h=402[/tex]

Therefore

[tex]Q=(0.792*0.718(440)-0.0871*0.718(400)+20-(0.792-0.087)*402))[/tex]

[tex]Q=-38.15kJ[/tex]

It is given mathematically that the system lost  or dissipated Heat of

[tex]Q=-38.15kJ[/tex]

How would the motion of the book change if there was LESS friction as it moved across the table?

Answers

less friction means harder to stop

Answer:

The motion of the book would change if there was less friction if it moved across the table is that it would spin and have more kenetic energy.

Explanation:

friction slows stuff down so if it had less friction it would speed up and spin when sliding.

What are the prevailing winds from the west toward the east called?

Prevailing Westerlies
Jet Stream
Gulf Stream
La Nina

Answers

Answer:

The Coriolis Effect, in combination with an area of high pressure, causes the prevailing winds—the trade winds—to move from east to west on both sides of the equator across this 60-degree "belt."

Explanation:

if its wrong welp sorry that what i know,

which vector is the sum of vectors a and b

Answers

Answer:

C

Explanation:

Vector A points up

Vector B points right

The combination must be both up and right which is C

I can someone help me and also I gtg so ill be back in a bit

Answers

Answer: No sure what to do

Explanation: points for points

A car is traveling constant spoed ol 12 12 m/s When the driver accelerates, the car reaches a speed of 26 m/s in s What is the average acceleration of the

Answers

Answer:

Average acceleration of the car is 1.167 m/s^2

Explanation:

The speed of car with which it is travelling is 12 m/s

As the driver accelerates the car, the speed reaches 26 m/s

The change in speed in 12 seconds is

26 -12 = 14 m/s

Average acceleration is change in speed divided by time

[tex]\frac{14}{12} \\1.167[/tex] m/s^2

What keeps planets in orbit? (i need help asap please T-T 10 points im low on points sorry)
A. Centrifugal force.
B. light energy
C. Gravity
D. All of the Above

Answers

Answer:

the answer is C gravity

Explanation:

What is the main function of b-cells?


B. They attack cells of the body that are infected.


None of these


A. They create antibodies.


They signal other lymphocytes to go after the pathogens.

Answers

Answer: They create antibodies.

the distance between a boy and a hill is 250 meters. if the boy shouts after how long will the echo be heard numerical problem​

Answers

Answer:

1.47 s

Explanation:

From the question,

s = 2d/t................... Equation 1

s = speed of sound in air, d = distance between the boy and the hill, t = time to hear the echo.

make t the subject of the equation

t = 2d/s............... Equation 2

Given: d = 250 meters

Constant: s = 340 m/s

Substitute these values into equation 2

t = (2×250)/340

t = 500/340

t = 1.47 s

what celestial body is cloest to earth

Answers

Answer:

Mercury

Essentially because Mercury is closest to the Sun, when taking an average over time, Mercury is the closest planet to the Earth, and - in that measure - it is the closest planet to each of the other planets in the Solar System.

Explanation:

A car starts from rest with an acceleration of 5.0 m / s² and travels a distance of 1.0 km. What is the speed value of this car?

Answers

Answer:

100 m/s

Explanation:

We'll begin by converting 1 km to m. This can be obtained as follow:

1 km = 1000 m

Finally, we shall determine the final velocity of the car. This can be obtained as follow:

Initial velocity (u) = 0 m/s

Acceleration (a) = 5.0 m/s²

Distance (s) = 1000 m

Final velocity (v) =?

v² = u² + 2as

v² = 0² + (2 × 5 × 1000)

v² = 0 + 10000

v² = 10000

Take the square root of both side

v = √10000

v = 100 m/s

Therefore, the speed value of the car is 100 m/s.

The mass of a body is 25 kg and the value of acceleration due to gravity is 9.8 m/s^2. Calculate the weight of body.​

Answers

Explanation:

weight=mass ×acceleration

weight=25×9.8

=245

W=mg
W= 25 * 9.8
W=245 kgm/s2
W=245N newton

When you are aware that you are having a dream and can control what you do
in that dream, it's called: ??
A. night terrors.
B. sleepwalking.
C. Stage 4 sleep.
D. lucid dreaming.

Answers

Answer:

D. lucid dreaming

Explanation:

(=^w^=)

What are tectonic plate boundaries?
A areas where Earth’s core experiences a high amount of stress
B areas where Earth’s core experiences a low amount of stress
C areas where Earth’s crust experiences a high amount of stress
D areas where Earth’s mantle experiences a high amount of stress

Answers

Answer:

c

Explanation:

Answer:

Areas where earth crust experiences a high amount of stress

Explanation:

FCAT review question

In a clear cup there are three substances. Their densities are 3, 1, and 2. From top of the cup to the bottom, what would the order of substances be sitting inside the cup?

Answers

Answer:

1, 2 and 3

Explanation:

The most dense substance will settle at the bottom of the cup

CAN SOMEONE PLEASE HELP FIGURE THIS OUT PLEASE

Answers

B is the answer hope this helped you

how does electricity work?​

Answers

Answer:Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. ... Once you can control the direction the electrons are going, you can use them to power or charge anything from a light bulb to your TV to your electric car.

Explanation:trust

Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

Planets can change the direction of their own orbital path.
Planets can change orbits due to their inertia.
Planets in motion will have a constant speed unless acted on by an outside force.
Planets with a greater mass will orbit more quickly than smaller planets.

Answers

the answer is c i think

Answer:

C. Planets in motion will have a constant speed unless acted on by an outside force.

Explanation:

Took the test

1. interpret data- based on the data, describe what alicia did.

2. draw conclusions- what conclusions can you draw? what does stirring do in terms of heat transfer?

help :(​

Answers

You can say something along the lines of “she created more surface area for heat to be radiated off the hot soup” (in terms of heat transfer).
As far as the conclusion goes, you can conclude that her hypothesis, date, research, and the scientific method was successful.

has anyone done this???i need the last questions for 1 and 2

Answers

Answer:

no i haven't done it

Explanation:

clean yo computer tho

4. Un móvil viaja en línea recta con una velocidad media de 1200 cm/s durante 9 s, y luego con velocidad media de 480 cm/s durante 7 s, siendo ambas velocidades del mismo sentido: a) ¿cuál es el desplazamiento total en el viaje de 16 s? B) ¿cuál es la velocidad media del viaje completo?

Answers

Answer:

A) El desplazamiento total del viaje es 14160 centímetros.

B) La velocidad media del viaje completo es 885 centímetros por segundo.

Explanation:

A) El desplazamiento es el producto de la velocidad media por el tiempo. El desplazamiento total es la suma de desplazamientos asociados a cada velocidad media, entonces:

[tex]x = \left(1200\,\frac{cm}{s}\right)\cdot (9\,s)+ \left(480\,\frac{cm}{s} \right)\cdot (7\,s)[/tex]

[tex]x = 14160\,cm[/tex]

El desplazamiento total del viaje es 14160 centímetros.

B) La velocidad media del viaje es el desplazamiento total dividido por el tiempo total, es decir:

[tex]\bar v = \frac{14160\,cm }{16\,s}[/tex]

[tex]\bar v = 885\,\frac{cm}{s}[/tex]

La velocidad media del viaje completo es 885 centímetros por segundo.

A piece of brass of mass 20.0g is hung on a sprong balance from a rigid support and completely immersed in kerosene of density 8.0 ×10 kgm-³. Determine the reading on the spring balance(g =10m/s², density of brass =8.0×10kgm-³)​

Answers

you can find that on photomath

The horizontal distance between two nodes is 1.5 meters what is the wavelength of then standing wave

Answers

Answer:

[tex]\lambda=3\ m[/tex]

Explanation:

Given that,

The horizontal distance between the two nodes is 1.5 meters.

We need to find the wavelength of the standing wave.

If we know the distance between nodes and antinodes, then the equation is :

[tex]\dfrac{\lambda}{2}=D[/tex]

Where

[tex]\lambda[/tex] is the wavelength

So,

[tex]\lambda=2D\\\\=2\times 1.5\\\\=3\ m[/tex]

So, the wavelength of the standing wave is equal to 3 m.

Which of the following is the best example of a heat conductor?

Answers

Answer:

Anything with a dark shade in color and with no reflective surface or any metal

Explanation:

In this case, a dark shirt or blanket would be a heat conductor as well as metal would be, too

How many degrees equal π in radians? How many revolutions (turns) equal π radians? ​

Answers

Answer:

It follows that the magnitude in radians of one complete revolution (360 degrees) is the length of the entire circumference divided by the radius, or 2πr / r, or 2π. Thus 2π radians is equal to 360 degrees, meaning that one radian is equal to 180/π ≈ 57.295779513082320876 degrees.

Explanation:

HELPPPP PLSSS I NEED HELP

Answers

Answer:

D. Pearl Harbor

Explanation:

30 kg sits on a table the acceleration due to gravity is 10 m/s^2 what force does the table exert on the television.
0.3N
3N
300N
600N

Answers

Answer:

300N

Explanation:

F=m×a

F=30kg×10m/s^2

F=300N

If 30 kilograms sit on a table the acceleration due to gravity is 10 meters/second², then the force exerted by the table on the television would be 300 Newtons,

Therefore the correct answer is option C.

What is acceleration?

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem If 30 kilograms sit on a table the acceleration due to gravity is 10 meters/second²,

the force exerted = mass × acceleration due to gravity

                       = 30 kilograms ×  10 meters/second²

                       = 300 Newtons

Thus, the force exerted by the table on the television would be 300 Newtons,

To learn more about acceleration from here, refer to the link;

brainly.com/question/2303856

#SPJ2

Una botella vacía tiene una masa de 24.25g y de 86.55g completamente llena de agua, se vacia el agua y se llena nuevamente con 123.95g de solvente tetracloruro de carbono, ¿cual es la densidad del solvente?

Answers

Answer:

La densidad del tetracloruro de carbono es 1.990 gramos por centímetro cúbico.

Explanation:

La masa de agua contenida dentro de la botella es igual a la diferencia entre la masa pesada totalmente llena y la masa pesada totalmente vacía, es decir:

[tex]m_{w} = 86.55\,g-24.25\,g[/tex]

[tex]m_{w} = 62.3\,g[/tex]

Ahora, de acuerdo con la definición de densidad, la masa es directamente proporcional a la densidad, entonces, podemos calcular la densidad del solvente mediante la siguiente relación:

[tex]\frac{m_{x}}{m_{w}} = \frac{\rho_{x}}{\rho_{w}}[/tex] (1)

Donde:

[tex]m_{x}[/tex] - Masa del tetracloruro de carbono, en gramos.

[tex]m_{w}[/tex] - Masa del agua, en gramos.

[tex]\rho_{x}[/tex] - Densidad del tetracloruro de carbono, en gramos por centímetro cúbico.

[tex]\rho_{w}[/tex] - Densidad del agua, en gramos por centímetro cúbico.

Si sabemos que [tex]m_{x} = 123.95\,g[/tex], [tex]m_{w} = 62.3\,g[/tex] y [tex]\rho_{w} = 1\,\frac{g}{cm^{3}}[/tex], entonces la densidad del tetracloruro de carbono es:

[tex]\rho_{x} = \left(\frac{m_{x}}{m_{w}} \right)\cdot \rho_{w}[/tex]

[tex]\rho_{x} = 1.990\,\frac{g}{cm^{3}}[/tex]

La densidad del tetracloruro de carbono es 1.990 gramos por centímetro cúbico.

Which feature causes a gap in the geologic record?

extrusion
fault
intrusion
erosion

Answers

Answer:

A                                    

Explanation:

Answer : a. Extrusion

A system releases 150 kJ of heat while 10 kJ of work is done on the system by
the surroundings. Calculate the change in internal energy (in kJ).

Answers

Answer:

160J OR 140J

Explanation:

Depends on teacher which formula your teacher uses.

U=Q+W OR U=Q-W

Method 1:

U=150+10J=160

U=150-10=140J

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