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3 years ago

8

While practicing the trumpet you notice that every time you play a particular note a window in the room rattles. How can you exp

lain this rattling in terms of wave behaviors?

1 answer:

kherson [118]3 years ago

7 0

The sound waves travel because of the pitch of the note so the window rattles.

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a load of 45 N attached to a spring that is hanging vertically stretches the spring 0.14 m. What is the spring constant?

zhenek [66]

According to Hooke's law, Force = spring constant x displacement of the spring. Spring constant = Force/displacement in spring = 45/0.14 = 321.42 N/m. Hope this helps!

3 0

3 years ago

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State and explain newton second law of motion also describe the concept of force, represent it quantiatively and derive the unit

Molodets [167]

Explanation:

Newton's second law of motion states F=ma which means force is equal to mass multiplied by acceleration which in simple terms means If you give mass force it will accelerate the concept of force in physics is any interaction that when unopposed will change the motion of an object.

8 0

3 years ago

At the bottom of the ocean, a rock has a mass 25 g. At sea level, the same rock will have a mass of: less than 25 g, more than 2

storchak [24]

It will be same 25 g

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3 years ago

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If you push a chair across the floor at a constant velocity, how does the force of friction compare with the force you exert? ex

patriot [66]

If the velocity of the chair is constant, then the net force acting on it is zero.

The force you exert to keep it going is equal and opposite to the force of friction.

6 0

3 years ago

A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the

tia_tia [17]

Answer:

t = 1.48 s

Explanation:

As we know that length of the Boeing plane is

$L = 59.7 m$

width of the intersection is given as

$w = 25.0 m$

now we know that deceleration of the plane is given as

$a = -5.4 m/s^2$

Also the final speed of the plane while it clears the intersection is given as

$v_f = 53 m/s$

now we have

$d = (\frac{v_f + v_i}{2}) t$

$(25 + 59.7) = (\frac{53 + v_i}{2}) t$

also we know that

$v_f - v_i = at$

$53 - v_i = -5.4 t$

now we have

$84.7 = (\frac{53 + 53 + 5.4t}{2})t$

by solving above equation we have

$t = 1.48 s$

5 0

3 years ago