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lara [203]
3 years ago
8

Which following options are examples of matter? A) light B) Molecules C) Feelings D) people

Physics
2 answers:
yaroslaw [1]3 years ago
6 0
All except C, feelings are not physical.
Dafna11 [192]3 years ago
4 0

b.molecules and d.people are the answers for apex

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A shuttle changed velocity from 5.0 km/s to 11.9 km/s in 0.5 seconds. What is the acceleration of
Veseljchak [2.6K]

Answer: The acceleration for the shuttle is 13 800m/s^2.

Explanation:

The answer is required is si unit which is m/s^2.

The first step is to convert to velocity to m/s, 1km=1000m therefore we have to multiply by 1000

5km/s=5000m/s

11.9km/s=11900m/s.

The formula for the acceleration is a=dv/t

a=11900-5000/0.5

a=13 800m/s

5 0
2 years ago
After a while, the car started to go around a long bend, still maintaining its constant speed of 55 miles per hour. Is there a n
sukhopar [10]

Answer:

4) True. The change of direction needs an unbalanced force

Explanation:

Let us propose the resolution of the problem using Newton's second law.

    F = m a

As the car is spinning the acceleration is centripetal

    a = v2.r

   

    F = m v2 / r

We can see that as the velocity of a vector even if its module does not change, the change of direction requires an external force.

Now we can analyze the statement if they are true or false

1) and 3) False, even when the speed changes, the direction changes

2) False with the speed change can be determined

4) True. The change of direction needs an unbalanced force

5) False are different things. the direction is where it is going and the speed is the magnitude of the vector

6 0
3 years ago
Of all the planets, which is the most different from the others? Explain.
Alenkinab [10]

Answer: VENUS

Explanation:

Venus tiene una lenta rotación retrógrada, lo que significa que gira de este a oeste, en lugar de hacerlo de oeste a este como lo hacen la mayoría de los demás planetas mayores (Urano también tiene una rotación retrógrada, aunque el eje de rotación de Urano, inclinado 97.86°, prácticamente descansa sobre el plano.

5 0
3 years ago
Read 2 more answers
The gravitational force between two objects will be greatest in which of the following situations?
Kobotan [32]

Answer:

Explanation:

Gravitational law states that, the force of attraction or repulsion between two masses is directly proportional to the product of the two masses and inversely proportional to the square of their distance apart.

So,

Let the masses be M1 and M2,

F ∝ M1 × M2

Let the distance apart be R

F ∝ 1 / R²

Combining the two equation

F ∝ M1•M2 / R²

G is the constant of proportional and it is called gravitational constant

F = G•M1•M2 / R²

So, to increase the gravitational force, the masses to the object must be increased and the distance apart must be reduced.

So, option c is correct

C. Both objects have large masses and are close together.

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2 years ago
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