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I am Lyosha [343]
3 years ago
13

When we talk about how a Ferrari obtains a top speed of 349 km/h, are we referring to average speed or instantaneous? How do you

know?
Physics
1 answer:
Viktor [21]3 years ago
4 0

Answer:

We are talking about instantaneous speed. This is because it says the Ferrari obtains a "Top speed" of 349 km/h. This means in one point of time, the Ferrari can reach 349 km/h. Hence, instantaneous speed.

Explanation:

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The speed of sound in air is 345 m/s. A tuning fork vibrates above the open end of a sound resonance tube. If sound waves have w
Delvig [45]

To develop this problem it is necessary to apply the concept of Frequency based on speed and wavelength.

According to the definition the frequency can be expressed as

f = \frac{v}{\lambda}

Where,

v = Velocity

\lambda = Wavelength

Our value are given by,

v = 345m/s

\lambda = 63cm

Replacing

f = \frac{345}{0.63}

f = 547.61Hz

Therefore the frequency of the tuning fork is 547.61Hz

6 0
3 years ago
A person is singing in the shower. They notice that as certain notes become very loud, the shower walls vibrate. Which statement
AysviL [449]

Answer:

the note is one of the harmonic frequencies for the shower.

I just took the quiz, this is correct. Hope this helps:)

Explanation:

8 0
3 years ago
5.An ice skater pushes against a wall with a force of 59 N. Ignoring friction, if the ice skater has
natali 33 [55]

Answer:

<em>Answer: (A) 0.75 m/s^2</em>

Explanation:

The Second Newton's law states that an object acquires acceleration when an external unbalanced net force is applied to it.

That acceleration is proportional to the net force and inversely proportional to the mass of the object.

It can be expressed with the formula:

\displaystyle a=\frac{F_n}{m}

Where

Fn = Net force

m  = mass

The ice skater pushes against a wall with a force of 59 N. The wall returns the force and the skater now has a net force of Fn=59 N that makes him accelerate. Being m=79 kg the mass of the skater, the acceleration is:

\displaystyle a=\frac{59}{79}

a = 0.75\ m/s^2

Answer: (A) 0.75 m/s^2

5 0
3 years ago
Calculate the force it would take to accelerate a 50 kg bike at a rate of 3 m/s2.
Ede4ka [16]

ummmm it might be 300... i used a calculator

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4 0
3 years ago
Rafael swings a baseball bat with a force of 25 N. The baseball bat exerts a force of 5 N on the baseball. What is the mechanica
vodomira [7]

the mechanical advantage of the baseball bat is 0.2

8 0
3 years ago
Read 2 more answers
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