All categories

2 years ago

Please help me with this question,giving the first correct answer brainliest

Physics

2 answers:

weqwewe [10]2 years ago

5 0

Answer:

C. Metalloids

Explanation:

Metalloids

elena-s [515]2 years ago

4 0

Answer:

Explanation:

You might be interested in

I REALLY NEED HELP WITH PHYSICS ASAP!!!<br>Vf^2 = v0^2 + 2a (xf - x0)<br><br><br>Solve for a

ELEN [110]

Answer:

a. solve for a

$vf ^{2} = vo ^{2} + 2a(xf - xo) \\ 2a(xf - xo) = vf^{2} - vo ^{2} \\ a = \frac{vf^{2} - vo^{2} }{2(xf - xo)} \\ a = \frac{vf ^{2} - vo ^{2} }{2xf - 2xo}$

I hope I helped you ^_^

7 0

3 years ago

Explain why the drill bit gets hot when it's turning in the wood

alexgriva [62]

The friction between the two objects creates heat.

3 0

3 years ago

Read 2 more answers

A certain ultrasound device can measure a fetal heart rate as low as 50 beats per minute. This corresponds to the surface of the

balu736 [363]

Answer:

The. Machine must detect a shift of

1 Hz

Explanation:

Frequency shift is given as

={ ( Vsound +V/ V sound -V) -1}f emitted

So by substitution we have

= { 1540+4E-4/1540-4E)-1) 2*10^6

= 1Hz

7 0

3 years ago

If the frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum speed of the oscillat

Mamont248 [21]

<h2>The option ( c ) is correct </h2>

Explanation:

As the frequency of oscillation of any oscillator is doubled

The velocity of sound v = νλ

here ν is the frequency and λ is the wavelength

Now if ν becomes double , the wavelength λ becomes one half . The velocity of sound remains the same in the same medium .

Thus option ( c ) is correct

7 0

3 years ago

A spinning top initially spins at 16rad/s but slows down to 12rad/s in 18s, due to friction. If the rotational inertia of the to

Alex Ar [27]

Answer:

The change in angular momentum is $\Delta L = 0.0016 \ kgm^2/s$

Explanation:

From the question we are told that

The initial angular velocity of the spinning top is $w_1 = 16 \ rad/s$

The angular velocity after it slow down is $w_2 = 12 \ rad/s$

The time for it to slow down is $t = 18 \ s$

The rotational inertia due to friction is $I = 0.0004 \ kg \cdot m^2$

Generally the change in the angular momentum is mathematically represented as

$\Delta L = I *(w_1 -w_2)$

substituting values

$\Delta L = 0.0004 *(16 -12)$

$\Delta L = 0.0016 \ kgm^2/s$

5 0

3 years ago