Chemistry, 16.09.2019 08:20 juliannabartra

Car q and z are put though an endurance test to see if they can travel at 120 km/h for 5.0 hours. each car has a 45-l fuel tank. car z must stop to refuel after traveling for 4.2 hours. car q, however, travels for 5.4 hours before running out of gas. for each car, calculate the average kilometers traveled for each liter of gas (km/l)

Answers: 1

Show answers

Answers

Answer from: melmar76

Explanation:

For car Z, according to the Newton equation,

v = u + at

where, v = final velocity = 0

u = initial velocity = 120 km/h

a = acceleration

t = time = 4.2 hours

Putting the given values into the above formula as follows.

v = u + at

0 = $120 km/h + a \times 4.2 hr$

a = 28.571 $km/h^{2}$

Also, it is known that $v^{2} = u^{2} + 2as$

s = $\frac{v^{2} - u^{2}}{2a}$

Putting the values into the above formula calculate for 's' as follows.

s = $\frac{v^{2} - u^{2}}{2a}$

= $\frac{(0)^{2} - (120)^{2}}{2 \times 28.571 km/hr^{2}}$

= 252.0 km

Since, 45 L of fuel is used by the car to travel 252 km. Then calculate car traveled km per liter as follows.

$\frac{252 km}{45 L}$

= 5.6 km/L

For car Q, v = u + at

0 = $120 + a \times 5.4 hr$

a = $\frac{120 km/hr}{5.4 hr}$

= 22.22 $km/hr^{2}$

Now, calculate value of 's' for car Q as follows.

s = $\frac{v^{2} - u^{2}}{2a}$

= $\frac{(0)^{2} - (120)^{2}}{2 \times 22.22 km/hr^{2}}$

= 324.0 km

Hence, average kilometers traveled for liter of gas is as follows.

$\frac{324 km}{45 L}$

7.2 km/L

Thus, we can conclude that the average kilometers traveled for each liter of gas (km/L) by car Z is 5.6 km/L and for car Q is 7.2 km/L.

Answer from: Quest

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

Answer from: Quest

Q2eqefefgvsdfvfefsvsdvcwef

Another question on Chemistry

Chemistry, 22.06.2019 09:00

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Answers: 2

Answer

Chemistry, 22.06.2019 21:30

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.

Answers: 1

Answer

Chemistry, 23.06.2019 06:00

•what conclusions can you make about the relationship between the volume of a gas and its temperature? • what conclusions can you make about the relationship between the volume of a gas and its pressure? • what possible variables have you not accounted for? as you did the procedures, is it possible that the atmospheric pressure may have changed? if it did change over the course of your experiment, then how would your results have been affected?

Answers: 3

Answer

Chemistry, 23.06.2019 06:30

Generally, observed behavior that can be formulated into a statement, sometimes mathematical in nature, is called a(n): a. observation. b. measurement. c. theory. d. natural law. e. experiment.

Answers: 2

Answer

You know the right answer?

Car q and z are put though an endurance test to see if they can travel at 120 km/h for 5.0 hours. ea...

Questions