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2 years ago

Which statements describe processes involved in the accretion of planetesimals and protoplanets? Check all that apply.

Physics

2 answers:

grin007 [14]2 years ago

5 0

Answer:

B & C

Explanation:

MakcuM [25]2 years ago

4 0

Answer:

The correct options are;

Both involve the formation of solid particles from nebular materials

Both involve the work of gravitational push on nebular materials

Explanation:

Planetesimals are thought to be the product of grains of cosmic dusts that are found in the debris and protoplanetary discs, such that hundreds of planet forming embrayos are considered to be the result of the collisions of planetesimals that collide with each other to form larger embrayos

Protoplanets is a large planetary body with a stratified interior due to internal melting that has taken place. They originate in the protoplanetary discs from the collision of planetesimals that are up to a kilometer in size.

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Solve 3* +5-220t = 0

slega [8]

Answer:

t = 27.5

Explanation:

$3 + 5 -220t = 0$

Well to solve for t we need to combine like terms and seperate t.

So 3+5= 8

8 - 220t = 0

We do +220 to both sides

8 = 220t

And now we divide 220 by 8 which is 27.5

Hence, t = 27.5

4 0

2 years ago

A 62 kg boy and a 37 kg girl use an elastic rope while engaged in a tug-of-war on a friction-less icy surface. If the accelerati

Paraphin [41]

Answer:

The magnitude of the acceleration of the boy toward the girl is $1.31\ m/s^2$

Explanation:

It is given that,

Mass of the boy, $m_1=62\ kg$

Mass of the girl, $m_2=37\ kg$

The acceleration of the girl toward the boy is, $a_2=2.2\ m/s^2$

To find,

The acceleration of the boy toward the girl.

Solution,

Let $a_1$ is the magnitude of the acceleration of the boy toward the girl. We know that force acting on one object to other are equal in magnitude but opposite in direction. So,

$F_1=-F_2$

$m_1a_1=-m_2a_2$

$a_1=-\dfrac{m_2a_2}{m_1}$

$a_1=-\dfrac{37\times 2.2}{62}$

$a_1=-1.31\ m/s^2$

$|a_1|=1.31\ m/s^2$

So, the magnitude of the acceleration of the boy toward the girl is $1.31\ m/s^2$

7 0

2 years ago

Please use this screenshot in any way you can

miskamm [114]

Ball 1 Has uchanging motion because it continually goes up no matter what. Ball 2 has no motion. And ball 3 changing motion because it goes from not moving to moving. Hope this helps

7 0

2 years ago

A circular loop of wire of radius 18 cm moves at a speed of 6.3 m/s in the direction of a 0.16 T uniform magnetic field, perpend

Degger [83]

Answer:

Explanation:

Since every value is constant, it shows us that there is no induced emf in the loop. This is according to Faraday's Law [ ε = -N(Δф/Δτ) ].

Best of Luck!

3 0

1 year ago

Consider two copper wires of equal cross-sectional area. One wire has 3 times the length of the other. How do the resistivities

vladimir2022 [97]

Answer:

Both wires have the same resistivity.

Explanation:

The resistivity of a material depends on the following factors:

The nature of the material, i.e., the number density of free electrons of the material.
The temperature of the material.

The resistance R of a wire of resistivity $\rho$ , length l and cross-sectional area A is given by

$R=\dfrac{\rho l}{A}.$

On varying the length and cross-sectional area of the wire, the resistance of the wire is changed but resistivity does not change as it is an intrinsic property of the material of the wire.

For the two given wires, the length and the cross-sectional area are different, but both the wires are of copper which means the number density of free electrons on both the wires is same and both the wires are placed in same environmental condition, which means the temperature would also be same.

Thus, the resistivities of both the wire are same.

7 0

2 years ago