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3 years ago

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Galileo, Giotto, Magellan, Mariner 2 These are all _________________ used to travel out of Earth's orbit to explore places that

would be too dangerous for astronomers or astronauts. These devices hold instruments to collect data specific to their destinations.

1 answer:

kykrilka [37]3 years ago

5 0

Probes,and engineered unmanned space technology..

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Why do you think the area swept out by a planet in a given period of time remains constant, even as the planet speeds up and slo

Levart [38]

Not sure this is entirely right but hey why not, right. <span> A planet orbiting a star orbits in an ellipse. Sometimes it's closer to the star and sometimes it's further. When it's closer to the star, the gravity on the planet from the star is stronger, so the planet speeds up. The area the planet sweeps over is equal because when it speeds up the length covered along the orbital path is greater, but it is also closer to the star, and that dimension is decreased. And because of our very intelligently designed and organized universe, these two factors cancel each other out perfectly </span>
<span>Hope I helped in some way!

</span>

6 0

3 years ago

Read 2 more answers

Sort the sentences based on whether they describe the properties of a heterogeneous or a homogenous mixture.

blagie [28]

A heterogeneous mixture may be mistaken for a pure substance. It can be separated using distillation. Concrete is an example of this heterogeneous kind of mixture.

<h3>What is a solute?</h3>

A solute is a material dissolved in another substance known as a solvent in a homogeneous mixture made of two or more components.

A solute's concentration in a solution is a measure of how much of that solute is dissolved in the solvent in relation to the amount of solvent present, such as salt.

Solutes are the best cleaning agents and additives. Dissolved in many types of gasoline are cleaning agents and anti-knock additives.

A homogenous mixture consists of the same type of component. While the heterogeneous mixture consists of a different component.

It's possible to confuse a heterogeneous combination for a pure material. Distillation is a method that can separate it. An illustration of this heterogeneous type of combination is concrete.

Homogenous mixtures are visible.

A heterogeneous mixture may be mistaken for a pure substance. It can be separated using distillation. Concrete is an example of this heterogeneous kind of mixture.

To learn more about the solute refer to the link; brainly.com/question/7932885

#SPJ1

4 0

1 year ago

A ball is thrown vertically upward with a speed of 25.0 m/s from a height of 2.0 m.

Marrrta [24]

Answer:

The answer to your question is

a) t = 2.55 s

b) t = 5.5 s

Explanation:

Data

vo = 25 m/s

h = 2 m

g = 9.81 m/s

Formula

t = -(vo)/g

a)

t = -(25)/9.81

t = 2.55 s

b)

Tt = 2t

Tt = 2(2.55)

Tt = 5.1 s

Time in the last 10 m

10 = 25t + (1/2)(9.81)t²

Simplify

10 = 25t 4.91t²

4.9t² + 25t - 10 = 0

Solve the equation using an online calculator

t₁ = 0.37 s t₂ = -5.47 s

The correct answer is t₁, t₂ is incorrect because there are no negative answers.

Total time = 5.1 + 0.37

= 5.5 s

4 0

2 years ago

A 20 Ohm resistance is connected

frutty [35]

Answer: 225 V

Explanation:

<u>Given:</u>

Secondary voltage,V2 = 150v

Resistance is connected across secondary winding,∴R2 = 20Ω

Supply current, ie, I1 = 5A

$\text{Now, secondary current,} \ $I_{2}=\frac{V_{2}}{R_{2}}=\frac{150}{20}=7.5$$$\therefore I_{2}=7.5 \mathrm{~A}$$For Transformers, we have $\frac{N_{2}}{N_{1}}=\frac{V_{2}}{V_{1}}=\frac{I_{1}}{I_{2}}$ so, Taking $\frac{N_{2}}{N_{1}}=\frac{l_{1}}{l_{2}}$ inserting all given \& obtained values, we get $\frac{N_{2}}{N_{1}}=\frac{5}{7.5}$$$\therefore \text { Turns ratio }=\frac{N_{1}}{N_{2}}=\frac{7.5}{5}=\frac{3}{2}=3: 2$$$

$\text{Again taking,}\frac{N_{1}}{N_{2}}=\frac{V_{2}}{V_{1}}$ \\So, \\$V_{1}=\frac{N_{1}}{N_{2}} V_{2}\\$ inserting all values, we get, $V_{1}=\frac{7.5}{5} * 150=225$\\Therefore, \fbox{Primary voltage, {$V_{1}=225 \mathrm{~V}$}}$

8 0

1 year ago

A projectile is launched from ground level at angle u and speed v0 into a headwind that causes a constant horizontal acceleratio

ale4655 [162]

Answer:

Explanation:

Given

Launch angle =u

Initial Speed is $v_0$

Horizontal acceleration is $a_x=a$

At maximum height velocity is zero therefore

$v_f=v_i-gt$

$0=v_0\sin u-gt$

$t=\frac{v_0\sin u}{g}$

Total time of flight $T=2t=\frac{2v_0\sin u}{g}$

During this time horizontal range is

$R=v_o\cos u\cdot 2t-\frac{a(2t)^2}{2}$

$R=\frac{2v_0^2\sin u\cos u}{g}-\frac{2av_0^2\sin ^u}{g^2}$

For maximum range $\frac{\mathrm{d} R}{\mathrm{d} u}=0$

$\frac{\mathrm{d} R}{\mathrm{d} u}=\frac{2v_0^2\cos 2u}{g}-\frac{4av_0^2\sin u\cos u}{g^2}$

$\frac{\mathrm{d} R}{\mathrm{d} u}=\frac{2v_0^2}{g}\left [ \cos 2u-\frac{a}{g}\sin 2u\right ]=0$

$\tan 2u=\frac{g}{a}$

$u=\frac{1}{2}tan ^{-1}\frac{g}{a}$

(b)If a =10% g

$a=0.1g$

thus $u=\frac{1}{2}tan^{-1}\frac{g}{0.1g}$

$u=42.14^{\circ}$

7 0

2 years ago