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MaRussiya [10]
4 years ago
6

If the price of gasoline at a particular station in Europe is 5 euros per liter. An American student in Europe is allowed to use

40 euros to buy gasoline. Knowing that 4 quarts make a gallon, and that 1 liter is about 1 US liquid quart, about how many gallons can the student buy?
Physics
1 answer:
Mashcka [7]4 years ago
5 0

Answer:

Number of gallons =2 gallon

Explanation:

given data:

rate of gasoline ineurope = 5 euro per liter

total money to buy gasoline =  40 euro

total gasoline an american can buy in europe = \frac{40}{5}

= 8 litres of gasoline

As given in the question 1 ltr is 1 quarts therefore  

Total no. of quarts is 8 quarts

As from question 4 quarts is equal to one gallon, hence

Number of gallons= \frac{8}{4} = 2 gallon

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A wave with a speed of 437 m/s has a frequency of 28 hertz. What is the length of the wave?
Natasha2012 [34]

Answer: 15.6 metres

Explanation:

Given that:

length of wave (λ)= ?

Frequency of wave F = 28 Hertz

Speed of wave (V) = 437 m/s

The wavelength is the distance covered by the wave in one complete cycle. It is measured in metres, and represented by the symbol λ.

So, apply V = F λ

Make λ the subject formula

λ = V / F

λ = 437 m/s / 28 Hertz

λ = 15.6 m

Thus, the length of the wave is 15.6 metres

6 0
4 years ago
Parallel conducting tracks, separated by 1.50 cm, run north and south. There is a uniform magnetic field of 1.20 T pointing upwa
Y_Kistochka [10]
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5 0
3 years ago
A fire hose 5 centimeters in diameter is used to fill a 225-liter bucket. If it takes 15 seconds to fill the bucket, what is the
Vika [28.1K]
I believe you ask about speed at the end of the hose:

The volume of the bucket is 225 liters which is equal to 225 dm^{3}.
V=225dm^{3}
Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):
A=3,14*\frac{d^{2}}{4}}=0,19625dm^{2}

225dm^{3} are filled within 15 second.

As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:
V=A*h
The speed of the water can be counted with equation:
v=\frac{h}{t}
After extracting h from the volume's equation you get:
v=\frac{V}{A*t}
When you count the fraction you get the answer:
v=76,43\frac{dm}{s}=0,7643\frac{m}{s}


4 0
3 years ago
A hammer taps on the end of a 4.10-m-long metal bar at room temperature. A microphone at the other end of the bar picks up two p
xz_007 [3.2K]

Answer:

Speed of sound inside metal is ≅ 8200 \frac{m}{s}

Explanation:

Given :

Length of metal bar x = 4.10 m

From general velocity equation,

 v = \frac{x}{t}

Where v = speed of sound in air = 343 \frac{m}{s}

For finding time from above equation,

  t = \frac{x}{v}

 t = \frac{4}{343}

t = 0.01166 sec

Since pulses are separated by  t_{o} =  11.1 \times 10^{-3} = 0.0111 sec

So we take time difference,

\Delta t = t_{} -t_{o}  = 0.0005

So speed of sound in metal is,

 v = \frac{x}{\Delta t }

 v = \frac{4.10}{0.0005}

 v = 8200 \frac{m}{s}

4 0
3 years ago
What best explains the speed of sound in different states of matter? Sound travels fastest in ice because energy is easier to tr
vagabundo [1.1K]

The speed of sound depends on any form of matter or medium in which sound travels through it and depends on the amount of molecular collisions. Sound travels slowest in gas in the form of steam because the sound has to move around the gas molecules that are far apart making it harder for the energy of vibrations hit the particles and make sound.

Moreover, sound travelling through solids like ice is much faster because the particles are closer together so the sound waves do not have to travel that far making the number of collisions greater and sound spread more easily.

6 0
3 years ago
Read 2 more answers
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