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3 years ago

Why is it that when riding in a car, you don't feel like you're moving?

Physics

1 answer:

UkoKoshka [18]3 years ago

6 0

This may shock you:

We NEVER feel speed, velocity, or motion, as long as it's constant.

We only feel CHANGES in speed, velocity, or motion.

That means speeding up, slowing down, or changing direction.

As long as we're moving in a straight line at a constant speed, we don't feel anything.

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The force diagram represents a girl pulling a sled with a mass of 6.0 kg to the left with a force of 10.0 N at a 30.0 degree ang

STatiana [176]

the correct answers are 54N and -1,2m/s^2

6 0

3 years ago

Read 2 more answers

Suppose astronomers built a 20-meter telescope. How much greater would its light-collecting area be than that of the 10-meter Ke

nirvana33 [79]

Answer:

4 times greater

Explanation:

Step 1: Calculate light-collecting area of a 20-meter telescope (A₁) by using area of a circle.

Area of circle = π*r² = $\frac{\pi d^{2}}{4}$

Where d is the diameter of the circle = 20-m

$A_{1} = \frac{\pi d^{2}}{4}$

$A_{1} = \frac{\pi (20^{2})}{4}$

A₁ = 314.2 m²

Step 2: Calculate light-collecting area of a 10-meter Keck telescope (A₂)

$A_{2} = \frac{\pi d^{2}}{4}$

Where d is the diameter of the circle = 10-m

$A_{2} = \frac{\pi (10^{2})}{4}$

A₂ = 78.55 m²

Step 3: divide A₁ by A₂

$= \frac{314.2 m^2}{78.55 m^2}$

= 4

Therefor, the 20-meter telescope light-collecting area would be 4 times greater than that of the 10-meter Keck telescope.

5 0

3 years ago

Why would elements found in the same group on the periodic table have similar reactivity’s

9966 [12]

Answer:

D. They have the same number of valence electrons

Explanation:

In order to answer this question we need to understand the following.

Valence electrons refers to the outermost electron(s) in the outermost energy level of an atom.
Elements in the same group in the periodic table have the same number of valence electrons. For instance, group 2A elements have 2 valence electrons.
The reactivity of elements in the periodic table is based on the number of valence electrons and the ease of gaining or losing electrons.
Elements in the same group have similar valence electrons and therefore share similar chemical properties such as reactivity.
Hence, elements in the same group have same number of valence electron and will thus have similar reactivity.

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4 years ago

Which Newton’s law is gown below? First Second Third Pls answer

Serggg [28]

Answer:

The First law of motion

Explanation:

The firat law states that an object either remains at rest or continues to move at a constant velocety unless acted upon by an external force

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3 years ago

How many grams are 2.5 x 10^23 molecules of mg

Brut [27]

2.5e+20 grams is the right answer

4 0

3 years ago