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3 years ago

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What question did use of a telescope by hubble answer A) Is earth the center of the universe B) Is the sun the center of the uni

verse C) How do the planets move in the solar system D) Are there more galaxies beyond the milky way

2 answers:

Marta_Voda [28]3 years ago

6 0

Answer:c

Explanation:

cestrela7 [59]3 years ago

3 0

Answer: C

Explanation:

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A flat disk, a solid sphere, and a hollow sphere each have the same mass m and radius r. The three objects are arranged so that

Paladinen [302]

Answer:

$I_{disc} = \frac{1}{2}mR^2$

$I_{sphere} = \frac{2}{5}mR^2$

$I_{hollow} = \frac{2}{3}mR^2$

so largest moment of inertia is for Hollow Sphere

Explanation:

Moment of inertia flat disc is given as

$I_{disc} = \frac{1}{2}mR^2$

moment of inertia of solid sphere

$I_{sphere} = \frac{2}{5}mR^2$

moment of inertia of hollow sphere

$I_{hollow} = \frac{2}{3}mR^2$

all the three objects are given with same mass and same radius

so largest moment of inertia is for Hollow Sphere

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4 years ago

When an electric current flows through a wire, the current produces which of the following?

ELEN [110]

An electric current produces a magnetic field when the current flows through a wire. The correct answer will be A.

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4 years ago

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The velocity of an object includes its speed and what

SCORPION-xisa [38]

I believe that the correct answer you are looking for is the distance traveled

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3 years ago

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How does the Wikileaks scenario show the negative power of the media?

lesya [120]

Answer:

B. The media released popular information.

Explanation:

We do not share the power in our media.

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3 years ago

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A paintball is fired horizontally from a tower 45 m above the ground. If the paintball gun fires at 90 m/s… How long does it tak

ankoles [38]

Answer:

The time taken for the paint ball to hit the ground is $t = 2.143 \ s$

The distance of the landing point from the tower is $d = 192.86 \ m$

Explanation:

From the question we are told that

The height of the tower is $h = 45 \ m$

The speed of the paintball in the horizontal direction is $v_x = 90 \ m/s$

Generally from kinematic equation we have that

$h = ut + \frac{1}{2} at^2$

Here u is the initial velocity of the paintball in the vertical direction and the value is 0 m/s , this because the ball was fired horizontally

a is equivalent to $g = 9.8\ m/s^2$

t is the time taken for the paintball to hit the ground

So

$45 = 0* t + \frac{1}{2} 9.8 * t^2$

=> $t = 2.143 \ s$

Generally the distance of its landing position from the tower is

$d = v * t$

=> $d = 90 * 2.143$

=> $d = 192.86 \ m$

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3 years ago