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3 years ago

Which term best describes how the solar system formed?.

Physics

1 answer:

FinnZ [79.3K]3 years ago

4 0

Answer:

Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula.

Explanation:

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from the edge of the rooftop of a building, a boy thros a stone at an angle of 25 above the horizontal. The stone hits the groun

ella [17]

Answer:38.675 m/s

Explanation:

$\theta =25^{\circ}$

t=4.2 s

$R_x=105m$

Solving in x direction

$R_x=ut+\frac{1}{2}\left ( 0\right )t^2$

$105=ucos25\times 4.2$

ucos25=25

u=27.584 m/s

Initial velocity in vertical direction usin25

Let h be the height of Rooftop

$h=\left ( -usin25\right )4.2+\frac{1}{2} \left ( 9.8\right )\left ( 4.2\right )^2$

h=37.47 m

Therefore final vertical velocity is $v_{vf}^2-\left ( usin25\right )^2=2\times 9.81\times 37.47$

$v_{vf}$ =29.51 m/s

Final Resultant velocity

$V_{final}=\sqrt{29.51^2+24.99^2}$

$V_{final}=38.675 m/s$

6 0

4 years ago

A hockey puck sliding on smooth ice at 4 m/s comes to a 1-m-high hill. Will it make it to the top of the hill?

solniwko [45]

Answer:

No it will not make to the top of the hill

Explanation:

From the question we are told that

The velocity is $v = 4 \ m/s$

The height of the hill is $h = 1 \ m$

Generally from the law of energy conservation we have that

The kinetic energy of the pluck at the level position = The potential energy of the pluck at the maximum height the pluck can get to

$\frac{1}{2} * m * v^2 = m * g * h_{max}$

=> $\frac{1}{2} * v^2 = g * h_{max}$

=> $h_{max} = \frac{0.5 * v^2}{g}$

=> $h_{max} = 0.8163 \ m$

Given that the maximum height which the pluck can get to at this speed given in the question is less than the height of the hill then conclusion will be that the pluck will not make it to the top of the hill

3 0

3 years ago

The value of k is given as 9.0 x 109 N.m^2/C^2. Which unit must be used

Zinaida [17]

The answer for this question is: C

6 0

3 years ago

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Which front formed widespread clouds rain or snow

Karolina [17]

Answer: A cold front occurs when cold, denser air replaces the rising, less dense air mass. The reason this front brings in the rain is that as the rising warm air cools (as it rises to the cooler upper atmosphere) the moisture in it condenses into clouds that precipitate down as rain or snow.

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3 years ago

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A baseball of radius r = 5.2 cm is at room temperature T = 20.8 C. The baseball has emissivity of ε = 0.86 and the Stefan-Boltzm

Marrrta [24]

Answer:

$P = 12.37 \frac{J}{s} = 12.37 Watts$