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2 years ago

Before it enters earths atmosphere, what type of force is acting on a spacecraft returning from the moon to earth?

Physics

2 answers:

3241004551 [841]2 years ago

3 0

D. Gravitational force

zepelin [54]2 years ago

3 0

Answer:

D. Gravitational force

Explanation:

I just took the test! :)

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Which of these is NOT an effect of humor?

IgorLugansk [536]

Feelings of jealousy and envy

7 0

3 years ago

A dust particle with mass of 5.4×10−2 g and a charge of 2.3×10−6 C is in a region of space where the potential is given by V(x)=

user100 [1]

Answer:

1.6 m/s^2

Explanation:

Hello!

To calculate the acceleration we must know the electric field. The electric field and the potential are related by:

$E = -\frac{dV}{dx} =- 2.6(\frac{V}{m^{2}})x + 8.1(\frac{V}{m^{3}})x^{2}$

If the particle starts at 2.3m, the electric field is:

E = 36.869 V/m = 36.869 N/C

So, the force on the particle is:

F = q E = 2.3×10^−6 C * 36.869 N/C = 8.48 x 10^-5 N

And its acceleration is :

a = F/m = 8.48 x 10^-5 N / 5.4×10−5 kg = 1.57 m/s^2

Rounded to two significant figures:

1.6 m/s^2

6 0

3 years ago

The planets that reside in the inner region of the solar system are called ______ (A. giants B.Ice Cap C.terrestral) planets. Th

siniylev [52]

In this order terrestral, rocky, Venus, Earth

5 0

3 years ago

Read 2 more answers

Drag each circle to the correct location on the image. Each circle can be used more than once, but not all circles will be used.

Valentin [98]

Based on the given information, the type of boundaries these two new plates would share with each other and the Arabian Plate are divergent boundaries.

<h3>Who are geologists?</h3>

A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other planets.

Geologists have observed that a portion of Africa is breaking away from the main continent. This is happening because the African Plate is in the process of splitting up into two parts. Scientists have named the two new tectonic plates the Nubian Plate and Somalian Plate. Both of these plates are not only moving away from each other but also away from the Arabian Plate.

There are 3 types of boundaries.

At convergent boundaries, the two tectonic plates comes closer to each other.

At divergent boundaries, the plates move away from each other.

At transform boundaries, the plates are moving parallel to their boundary.

Based on this, all boundaries will be divergent boundaries.

Learn more about geologist.

brainly.com/question/13428729

#SPJ1

5 0

1 year ago

Physics students use a spring scale to measure the weight of a piece of lead. The experiment was performed two times: once in th

Lady_Fox [76]

Answer:

The reading of the experiment made in air is 50 g more than the reading of the measurement made in water.

Explanation:

Knowing that the density of lead is $11,3 g/cm^{3}$ and the volume, we can calculate the true weight of the piece of lead:

$weight_{lead}=\rho _{lead}*V_{lead}=11,3 g/cm^{3} *50 cm^{3} = 565 g$

When the experiment is done in air, we can discard buoyancy force (due to different densities) made by air because it's negligible and the measured weight is approximately the same as the true weight.

When it is done in water, the effect of buoyancy force (force made by the displaced water) is no longer negligible, so we have to take it into account.

Knowing that the density of water is 1 g per cubic centimeter, and that the volume displaced is equal to the piece of lead (because of its much higher density, the piece of lead sinks), we can know that the buoyancy force made by water is 50 g, opposite to the weight of the lead.

$Weight_{measured}=weight_{lead}-weight_{water}=\frac{(565 g *9.8 m/s^{2} -50 g*9.8 m/s^{2})}{9,8m/s^{2} } = 515 g$

Now that we have the two measurements, we can calculate the difference:

$Difference= |Weight _{in water}- Weight _{in air}|=|515 g-565 g|=50 g$

The reading of the experiment made in air is 50 g more than the reading of the measurement made in water.

4 0

2 years ago