3 years ago

You drop a glass on the floor and it shattters chemical or physical change ?

2 answers:

7 0

This describes a physical change. The glass shattering changes its physical shape and appearance only, as it retains its chemical composition.

Ket [755]3 years ago

3 0

This is Physical change.

Hope this helps!

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Why is the answer B? I'm not sure which equation to look at when doing these proportion types of problems.

loris [4]

Explanation:

Given:

Δy = d

v₀ = 0

a = g

Find: v

v² = v₀² + 2aΔy

v² = (0)² + 2(g)(d)

v = √(2gd)

If we double d:

√(2g (2d))

√(4gd)

Compared to the first velocity:

√(4gd) / √(2gd)

√2

So the new velocity is √2 greater than the first velocity.

√2 v

7 0

3 years ago

Determine the length of a wind instrument, assuming that it is modeled as a closed tube and that the lowest sound that it can pl

denis-greek [22]

Answer:

length = 1.24m

Explanation:

velocity = frequency x wavelength

wavelength = velocity/frequency

w = 343/69 =4.97m

length = wavelength/4

length =4.97/4 =1.24m

3 0

3 years ago

Can someone please help me with this question.

Hoochie [10]

Answer:

compressional wave

Explanation:

6 0

3 years ago

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A long iron bar lies along the x-axis and has current of I = 16.4 A running through it in the +x-direction. The bar is in the pr

Gre4nikov [31]

Answer:

B = 8.0487mT

Explanation:

To solve the exercise it is necessary to take into account the considerations of the Magnetic Force described by Faraday,

The magnetic force is given by the formula

$F =BILsin\theta$

Where,

B = Magnetic Field

I = Current

L = Length

$\theta =$ Angle between the magnetic field and the velocity, for this case are perpendicular, then is 90 degrees

According to our data we have that

I = 16.4A

F = 0.132N/m

As we know our equation must be modificated to Force per length unit, that is

$\frac{F}{L} = BI sin(90)$

Replacing the values we have that

$0.132 = 16.4 (1) B$

Solving for B,

$B = \frac{0.132}{16.4}$

$B = 8.0487mT$

8 0

4 years ago

Please ans both urgent

Tpy6a [65]

Answer:

d I guess not sure

b if down I guess

Explanation:

if worng then plz dont say anything as I am not sure about the ans

4 0

3 years ago

Read 2 more answers