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3 years ago

1. how do scientists classify small objects in solar system

2 answers:

7 0

I believe the correct answer from the choices listed above is the last option. Scientists classify small objects in the solar system by its <span>size , shape , and composition. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>

polet [3.4K]3 years ago

6 0

Option D is the correct answer. Option C is incorrect cuz temperature is not constant in outer space which makes difficult for classification. So composition of objects matters. Hence D. Hope it helps.

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What happens to potential energy when a skier goes down the hill? <br> A. Decrease <br> B. Increase

luda_lava [24]

Question: What happens to potential energy when a skier goes down the hill?

Answer: Decrease

Explanation: As the skier begins the descent down the hill potential energy is lost and kinetic energy is going to start acting

question answered by

(jacemorris04)

4 0

3 years ago

Suppose you could suddenly increase the speed of every molecule in a gas by a factor of 2. Would the gas pressure increase by a

Elena L [17]

<h2>The pressure will become double </h2>

Explanation:

The gas pressure is directly proportional to the mean root square velocity of the constituent molecules of gas .

P ∝ $\sqrt{\frac{C_1^2+C_2^2+C_3^2----C_n^2}{n} }$ I

Here C₁ , C₂ ------------ Cₙ is the velocities of molecules .

By making these velocities double

The pressure P₀ ∝ 2 $\sqrt{\frac{C_1^2+C_2^2+C_3^2----C_n^2}{n} }$ II

By dividing II by I

P₀ = 2 P

Thus pressure will become double than its previous value

5 0

3 years ago

Why is the answer B for this question? I know acceleration should be negative down but I don't know the other two variables.

AnnZ [28]

Answer:

Explanation:

Displacement, velocity, and acceleration are vectors: they have magnitude and direction.

The convention is that "down" is negative and "up" is positive.

Thus, if an object is higher than when it started, its displacement is positive. If it is lower, the displacement is negative.

If it is still going "up", its velocity is positive. If it is falling, its velocity is negative.

1. Displacement

The formula for vertical displacement is

Δy = v₀t - ½gt²

If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then

$\begin{array}{rcl}\Delta y & = & 30 \times2 - \dfrac{1}{2}\times 9.8 \times2^{2}\\& = & 60 - 4.9 \times 4\\& = & 60 - 19.6\\& = & \mathbf{40.4}\\\end{array}\\\text{The displacement is}\textbf{ up}}$

2. Velocity

The formula for vertical velocity is

v = v₀ - gt

If v₀ = 30 m/s, t = 2 s, and g = 9.8 m·s⁻², then

$\begin{array}{rcl}v & = & 30 - 9.8 \times 2\\& = & 30 - 19.6\\& = & \mathbf{10.4}\\\end{array}\\\text{The velocity is}\textbf{ up}}$

3. Acceleration

The vertical acceleration is always -g = -9.8 m·s⁻².

The direction of the acceleration is down.

The only option with the sequence "up, up, down" is B.

6 0

3 years ago

A truck moving at 20 mph shoots a soccer ball at 20 mph in the opposite direction. How fast is the soccer ball moving? Explain

Brrunno [24]

Answer:

Speed of the soccer ball with respect to ground is ZERO

Explanation:

As we know that truck is moving with speed 20 mph

Now a soccer ball is shoot from truck with respect to the motion of truck in opposite direction

The relative speed of the soccer ball is

$v_{bt} = 20 mph$

now we know that

$v_{bt} = v_b - v_t$

so we have

$-20 mph = v_b - 20$

so we have

$v_b = 0$

6 0

4 years ago

What factors affect the upthrust exerted by the fluid on any object immersed on it?

shepuryov [24]

When an object is put into water (or any other liquid) there are forces placed on it. These forces create depth in the liquid and its density will affect the upthrust on an object The same situation will occur no matter how deep the object is placed (as long as it is completely submerged).

5 0

3 years ago