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3 years ago

Which planet is small, with a rocky surface and an atmosphere?

1 answer:

6 0

Mars is the fourth planet from the sun and is known as the "red planet." It is the most like earth planet in space but about half its size. It has a dry rocky surface with a thin atmosphere.

Naetoosmart

3 years ago

Venus

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According to this graph, which statement describes how the amount of iron changes over time in the reaction

VashaNatasha [74]

The graph shows the production of Fe, from the graph that it increases rapidly and then slowly increases.The answer is a! (:

5 0

4 years ago

Under what conditions will a moving 0.030 kg marble and a moving 2.43 kg rock have the same kinetic energy

Anestetic [448]

Answer:

To have the same kinetic energy the speed of the marble must be 9 times the speed of rock.

Explanation:

The general formula of kinetic energy is given as follows:

$K.E = \frac{1}{2}mv^{2}$

where,

K.E = Kinetic Energy

m = mass of the object

v = speed of the object

So, for the marble and rock to have same kinetic energy, we can write:

$K.E_{marble} = K.E_{rock}\\\\\frac{1}{2}m_{marble}v_{marble}^{2} = \frac{1}{2}m_{rock}v_{rock}^{2}\\\\(0.03\ kg)v_{marble}^{2} = (2.43\ kg)v_{rock}^{2}\\\\taking\ square\ root\ on\ both\ sides:\\v_{marble} = \sqrt{\frac{2.43\ kg}{0.03\ kg}}v_{rock}\\\\v_{marble} = 9\ v_{rock}$

Hence, to have the same kinetic energy the speed of the marble must be 9 times the speed of rock.

4 0

3 years ago

Momentum ap physics 1

11111nata11111 [884]

Answer:

The correct option is;

B. Object X travels at -2 m/s and object Y travels at 4 m/s after the spring is no longer compressed

Explanation:

The given parameters are;

The mass of object Y = M

The mass of object X = 2·M

The initial velocity of object X and object Y = 0 m/s

Let A represent the velocity of object X after the spring is released and B represent the velocity of object Y after the spring is released, therefore, by the principle of the conservation of linear momentum, we have;

(M + 2·M) × 0 = M × B + 2·M × A

∴ (M + 2·M) × 0 = 0 = M × B + 2·M × A

M × B = -2·M × A

∴ B = -2·A

Therefore, the velocity of the object Y = -2 × The velocity of the object X

Whereby the velocity of the object X = -2, The velocity of the object Y = -2 × -2 = 4

Which gives, object X travels at -2 m/s and object Y travels at 4 m/s after the spring is no longer compressed.

8 0

3 years ago

What distinguishes mass from weight? A. Mass is a measure of the amount of matter in an object, while weight is a measure of the

Studentka2010 [4]

Answer:

A. Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.

Explanation:

Mass is also a scalar quantity associated with the amount of atoms and/or molecules that constitutes the object. While weight is a force due to the action of gravity (either on our planet or any other one) and therefore a vector quantity that we routinely use as scalar due to the fact that it is always pointing down (towards the center of the Earth) so we ignore a bit the direction associated with it.

7 0

3 years ago

Read 2 more answers

Please Help with thia question

telo118 [61]

Answer:

the types of force shown in the picture is

balanced force.

6 0

3 years ago