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3 years ago

Why do people sound different even when they sing the same note?

Physics

1 answer:

Nitella [24]3 years ago

5 0

I think it is A.. but then again im not sure

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Two identical metal spheres A and B are in contact. Both are initially neutral. 1.0× 10 12 electrons are added to sphere A, then

Vilka [71]

Answer:

8 x 10^-8 C on both the spheres.

Explanation:

Number of electrons added to A = 1 x 10^12

As the sphere A and B are identical to each other so the charge is shared equally.

Charge of one electron = 1.6 x 10^-19 C

Charge on A after wards

= number of electrons after wards x charge of one electron

qA = 0.5 x 10^12 x 1.6 x 10^-19 = 8 x 10^-8 C

Similarly, the charge on sphere B afterwards

= number of electrons after wards x charge of one electron

qB = 0.5 x 10^12 x 1.6 x 10^-19 = 8 x 10^-8 C

8 0

3 years ago

Un bloque de 750 kg es empujado hacia arriba por una pista inclinada 15º respecto de la horizontal. El coeficiente de rozamiento

kotegsom [21]

Answer:

4776.98 N is the minimum force to start the rise.

Explanation:

We can use the first Newton's law to find the minimum force to move the block.

So we will have:

$F-W_{x}-F_{f}=0$

Where:

F is the force
W(x) is the weight of the block in the x direction, W = mg*sin(15)
F(f) is the static friction force (F(f) = μN), μ is the static friction coefficient 0.4.

$F=W_{x}+F_{f}=mgsin(15)+\mu N$

$F=mgsin(15)+\mu mgcos(15)$

$F=mg(sin(15)+\mu cos(15))$

$F=750*9.81(sin(15)+0.4*cos(15))$

$F=4776.98 N$

Therefore 4776.98 N is the minimum force to move the block.

I hope it helps you!

8 0

3 years ago

An electronic charge can be transmitted through?

DedPeter [7]

Answer:

An electronic charge can be transmitted through the human body, water and metals.

6 0

4 years ago

According to the law of reflection the angle of incidence is equal to the angle of blank

mariarad [96]

The answer should be:

Angle Of incidence is equal to angle of reflection.

8 0

4 years ago

Read 2 more answers

An object is falling from a height of 7.5 meters. At what height will its velocity be 7 meters/second?

Ivanshal [37]

Answer:

5.0 m

Explanation:

The velocity of the object at time t is given by

$v=at$

where a=9.8 m/s^2 is the acceleration of gravity and t is the time. If we substitute v=7 m/s, we can find the time t at which the velocity became 7 m/s:

$t=\frac{v}{a}=\frac{7 m/s}{9.8 m/s^2}=0.71 s$

The height of the object at time t, h(t), is given by the equation

$h(t)=h_0 -\frac{1}{2}at^2$

where $h_0 = 7.5 m$ is the initial height. By substituting t=0.71 s inside the equation, we find the height h(t) at which the velocity is 7 m/s:

$h(0.71 s)=7.5 m- \frac{1}{2}(9.8 m/s^2)(0.71 s)^2=5.0 m$

8 0

3 years ago