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3 years ago

Which object is probably composed of ice and dust?

Physics

2 answers:

Setler [38]3 years ago

7 0

I think comets because they are small and they are composed of ice or water. Hope it helps :)

Alik [6]3 years ago

4 0

The answer is comets

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A football is kicked into the air with a horizontal velocity of 20 m/s and a vertical velocity of 30 m/s what is the resultant v

kati45 [8]

For this one, you can use Pythagorean theorem.

a^2 + b^2 = c^2 -------- c will be the resultant

(20 m/s)^2 + (30 m/s)^2 = c^2

solve for c.

= 36.1 m/s

Please brainliest me if this helped; trying to level up!

6 0

4 years ago

6. A car moving in a straight line at constant speed:

ddd [48]

Answer:

D. has no overall force acting on it.

Explanation:

Why?

Because in a straight line at the constant speed means the car moving in the same velocity, which is not acceleration neither deceleration, and it cannot be on a downhill slope. So the correct answer is

<h3>→ D. has no overall force acting on it.</h3>

8 0

3 years ago

The charge density of radius 12.0 cm isgiven by with a = 1.40 μC/m 3 and r ismeasured radially outward from theorigin. What is t

Zigmanuir [339]

Answer:

The electric potential of the uniformly charge disk is 1392.1 V

Explanation:

Electric potential, for a uniformly charged disk at a distance A, is given as;

$V = \frac{\sigma}{2 \epsilon} [\sqrt{A^2 +R^2} -A]$

Where;

σ is the charge density = 1.40 μC/m³

ε is the permittivity of free space = 8.85 x 10⁻¹²

A is the distance above the disk = 40 cm = 0.4 m

R is the radius of the disk = 0.12 m

Substitute in these values into the equation above, we will have

$V = \frac{1.4 X 10^{-6}}{2X8,85X10^{-12}}[\sqrt{0.4^2 +0.12^2}-0.4] \\\\V = (79096.05)(0.0176) = 1392.1 V$

Therefore, the electric potential of the uniformly charge disk is 1392.1 V

3 0

3 years ago

A 6.00-m long string sustains a three-loop standing wave pattern as shown. The wave speed is 2.00 × 102 m/s.What is the lowest p

KATRIN_1 [288]

Given:

The length of the string is l = 6 m

The speed of the wave is

$v=2\times10^2\text{ m/s}$

Required: Lowest possible frequency for the standing wave.

Explanation:

The lowest possible frequency is the fundamental frequency.

The fundamental frequency can be calculated by the formula

$f=\frac{v}{2l}$

On substituting the values, the fundamental frequency will be

$\begin{gathered} f=\frac{2\times10^2}{2\times6} \\ =16.67\text{ Hz} \end{gathered}$

Final Answer: The lowest possible frequency for standing waves on this string is 16.67 Hz

4 0

2 years ago

Suppose we have two planets with the same mass, but the radius of the second one is twice the size of the first one. How does th

bogdanovich [222]

The free-fall acceleration on the second planet is one-fourth the value of the first planet.

Calculation:

Consider the mass of planet A to be, M

the mass of planet B to be, Mₓ = M

the radius of planet A to be, R₁

the radius of planet B to be, R₂

The acceleration due to gravity on planet A's surface is given as:

g = GM/R₁² - (1)

Similarly, the acceleration due to gravity on planet B's surface is given as:

g' = GM/R₂² [where, R₂ = 2R₁]

= GM/4R₁² -(2)

From equation 1 & 2, we get:

g/g' = GM/R₁² ÷ GM/4R₁²

g/g' = 4/1

Thus we get,

g' = 1/4 g

Therefore, the free-fall acceleration on the second planet is one-fourth the value of the first planet.

Learn more about free-fall here:

<u>brainly.com/question/13299152</u>

#SPJ4

6 0

2 years ago