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3 years ago

10

Which astronomer desighed scientific instruments, inclubing a nrw kind of thetmometer, an improved compass? and a more powerfull

telescope?

1 answer:

Alla [95]3 years ago

4 0

Galileo Galilei is the man that invented the stuff

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This demonstrates which of the following?

LekaFEV [45]

Answer:

A. is the answer

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3 years ago

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What are three behaviors that electrons exhibit during reactions

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The behavior in an electron is an atom is described by an orbital.

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3 years ago

A disk-shaped grindstone of mass 1.7 kg and radius 8 cm is spinning at 730 rev/min. After the power is shut off, a woman continu

Anastasy [175]

Answer:

0.186 N-m

Explanation:

mass of the grindstone, $m=1.7 kg$

radius, $r=8 cm$

Frequency, $f=730 rev/min = 12.16 rev/s$

time, $t=9s$

final angular velocity, $\omega=0$

Initial angular velocity,

$\omega_o=2\pi f\\=2\pi (12.16) rad/s\\= 76.36 rad/s$

Angular acceleration of the grind stone is:

$\alpha=\frac{\omega-\omega_o}{t}\\\Rightarrow \alpha =\frac{0-76.36}{9} = -8.48 rad/s^2$

Moment of inertia:

$I=mr^2+mr^2=2mr^2$

$I=2\times 1.7 kg\times (0.08m)^2= 0.022kg-m^2$

Torque exerted by the ax on the grind stone is:

$\tau=I\alpha\\\tau=0.022\times (-8.48) \\\tau=0.186N-m$

8 0

4 years ago

Some one plz help me

Anna71 [15]

Here is your answer

Windmill- Wind energy - Mechanical energy- Electrical energy.

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HOPE IT IS USEFUL

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3 years ago

The transmission of heat requiring the movement of a liquid or a gas is

AysviL [449]

Answer:

convection

Explanation:

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4 years ago