pls help with this problem, it's not too hard

Answer:

Explanation:

Its surface is rocky, with canyons, volcanoes, dry lake beds and craters all over it. Red dust covers most of its surface. Mars has clouds and wind just like Earth

#1

Here

Calcium is less reactive than sodium so it can't displace Na .

Nothing will happen

#2

This is oxidation

Answer:

Increasing the number of loops of wire around the iron core

Hope this helps!

A ravine is a smaller version of a canyon that is typically formed by stream bank erosion. Ravines are greater in scale than gullies, but smaller than valleys.

A ravine is a  slope landform with relatively steep sides,Ravines may or may not contain active streams running along the down slope channel that produced them.

Ravine are frequently characterized by intermittent streams, since their geographic size is too small to maintain a perennial watercourse.

Hence, a ravine is a smaller version of a canyon that is typically formed by stream bank erosion.

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Answer:

11. Light waves are electromagnetic (created by electromagnetic impulse)

12. Light waves in a medium are slower V = C / Nm where Nm is the index of refraction of the medium

13. The frequency of the vibration remains the same

14. The wavelength of light in the medium is less

λ = V / f    and it was determined in 12 that the velocity is less in the medium

Answer:

Explanation:

Refractive index of denser medium w.r.t rarer medium

[tex]r[/tex]ч[tex]d[/tex][tex]=\frac{1}{sini_{c} }[/tex]

where, [tex]i_{c}[/tex]  = critical angle

Answer:

17N

Explanation:

the side with most net force is going to be deducted by the side with the least net force.

Answer:

Explanation:

Here we are given sound moving in air at 43.2 m/s and that has a frequency of 2.11 hz and we need o calculate the Wavelength.

Using formula:

[tex] \\ \: \: \longrightarrow \: \: \:{ \underline{ \boxed{ \sf Frequency = \dfrac{Wave \: speed}{Wave \: length}}}} \\ [/tex]

Where,

On Substituting the values, we get:

[tex]\\ \sf \: \: \: \longrightarrow \: \: \: 2.11 = \dfrac{43.2}{Wave \: Length} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:Wave\: Length = \frac{43.2}{2.11} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:{ \pink{ \underline{Wave \:Length = 20.47 m}} }\\ \\ [/tex]

Hence,

[tex]\large\boxed{\bold{Formula: λ= \frac{v}{f}}}[/tex]

In this question all the values are given so we'll simply have to substitute the values and solve.

Let's solve!

We'll have to divide the velocity or speed by the frequency.

Substitute the values according to the formula.

[tex] λ= \frac{43.2}{2.11}[/tex]

Calculator answer:

[tex]\bold{λ= 20.47393365 \: m}[/tex]

Now, we can round off to the nearest hundredth.

The value in the thousandths place is smaller than 5 so we won't have to round up.

Final answer:

[tex]\large\boxed{\bold{λ= 20.47 \:m}}[/tex]

Therefore, the wavelength is 20.47 meter.

Answer: Option A

149,597,871 kilometres

hope it helps...!!!

The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.

The electromagnetic radiation distribution in accordance with the frequency or wavelength is known as the electromagnetic spectrum.

The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.

Hence, option b is correct.

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It important to assess flexibility both before and during a workout regimen because to assess flexibility progress.

Flexibility exercises, as the name implies, help to increase the stretch of the muscles, improving the range of motion. More flexibility is also important to help prevent possible post-workout soreness.

In this case we have that the reason to continue doing stretching before and during the exercises is about  to assess flexibility progress.

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Answer:

A

Explanation:

Answer:

A. It pulls objects towards the center of Earth.

Explanation:

Think about dropping something, where does it go? If you are on earth, this goes down towards the ground due to the attractive force of gravity on every object (to pull everything to center of earth). Like Newton's apple.

The value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.

The capacitance of the circuit is calculated as follows.

Assuming a parallel circuit arrangement for the capacitors;

C(total) = C1 + C2

58 F = 33 F + C2

C2 = 58 F - 33 F

C2 = 25 F

Thus, the value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.

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The attraction between masses as small as our bodies, or even objects the size of skyscrapers, is incredibly small. For example, two 1.0-kg masses located 1.0 meter apart exert a force of 6.7×10−11N 6.7 × 10 − 11 N on each other.Answer:

Explanation:

Even between objects the size of skyscrapers or masses as small as our bodies, there is incredibly little attraction. For instance, a force of 6.71011N is generated when two 1.0-kg masses are placed 1.0 meters apart. 6.7 10 11 N on top of one another.

M/s2 is its SI unit. Its vector nature—which includes both magnitude and direction—makes it a quantity. The unit g stands for gravitational acceleration. At sea level, the standard value of g on earth's surface is 9.8 m/s2.

The magnitude of PQ is represented symbolically as | PQ |. The Distance Formula can be used to determine a vector's magnitude if its start and end points' coordinates are known.

Therefore, The distance between a vector's starting point P and ending point Q is its magnitude.

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Answer:

Measurements are a basic necessity in science. Scientists have designed thousands of different tools to help in the vital process of measuring. In this image of the control panel of the space shuttle Atlantis, we see dozens of readouts from measuring systems.

Answer:

Third option

Explanation:

IF you ignore air resistance, they will fall at the same rate due to the effect of gravity being the same on both ....BUT the third option seems to be correct as air friction is taken into account....   the bowling ball will be affected by air resistance too, bul less so..

Answer:

The answer is thallium.

Explanation:

Answer:

Explanation:

The quantity of energy transferred by a force when it is applied to a body and causes that body to move in the direction of the force work.

Answer:

heat energy

Explanation:

Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.

Answer:

the answer is The lens forms a real image.

Explanation:

got it right on edge

Answer:

air pressure in the air-tight bag is greater than cabin air pressure

Explanation:

Answer:

3.96 meters / sec

Explanation:

The skaters Kinetic Energy is converted to Potential Energy ( ignoring friction)

KE = PE

1/2  * 55 * v^2 = 55 * 9.81 * .8

solve for v = 3.96 m/s

Answer:

196 J

Explanation:

Formula

Here, we are given :

Solving

Answer:

true

Explanation:

because rubbing together they will both have friction

Remember the fact that every object has a specific amount of latent heat of vaporization

The specific heat capacity of iron and water are different

Answer:

1.5v

Explanation:

This is a series circuit with identical components, so the potential difference will be shared equally between each component. (1.5V + 1.5V) / 2 = 1.5V

According to the diagram, voltmeter 1 will show 1.5 V. Because it is a series combination voltmeter 2 will also show 1.5 V.

The potential difference, or voltage, between two points in an electrical or electronic circuit is measured using a voltmeter, also referred to as a voltage meter. While some voltmeters are made for use in alternating current (AC) circuits, others are meant to be used in direct current (DC) courses. Voltage for radio frequency (RF) can be measured using specialized voltmeters.

A simple analog voltmeter is a high resistance connected in series with a sensitive galvanometer (current meter). A voltmeter needs to have high internal resistance. Otherwise, it will consume a sizable amount of current, interfering with the test circuit's performance. The range of voltages that the meter can display depends on the series resistance value and the sensitivity of the galvanometer.

Since all of the components in this series circuit are the same, any potential difference will be distributed equally i.e., (1.5V + 1.5V) / 2 = 1.5V

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Answer:

false .....................