one cannot peer all the way back and directly observe the big bang because the universe's density was so low. true false

Answer:c

Explanation:

the resistance of the wire to the nearest tenth of an ohm is 2Ω.

What is resistance?

resistance is a measure of the opposition to current flow in an electrical circuit. resistance always measure in ohm.It design with R.A resistor is a device designed to produce resistance. resistor can be used to the  limit current, divide voltage, or generate heat.

Sol-Potential difference (V) = current (I) * Resistance (R)

V = IR

I = 2.0A

V = 10v

So the

R = ?

V = IR

R = V / I

R = 10 / 2

R = 2Ω

Thus the,

The resistance across the wire is 2Ω.

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Answer:

Actually, the substance is the one that changes from liquid to gas.

The molecule just gains energy which overcomes the attraction force between it and neighboring molecule.

The Earth's temperature without an atmosphere, determined by substituting 342 W/m² for outgoing longwave radiation and rearranging the Stefan-Boltzmann equation, is approximately 255 K.

By substituting the given values into the Stefan-Boltzmann equation, we can solve for the Earth's temperature without an atmosphere. Assuming an emissivity of 1, the equation becomes 342 = (5.67 × 10^-8) × T^4. Solving for T yields a temperature of approximately 255 K.

Converting this temperature to degrees Celsius, we subtract 273.15 to obtain approximately -18.15 °C. Similarly, converting to degrees Fahrenheit using the conversion formula, we find approximately -0.67 °F.

This temperature of -18.15 °C (or -0.67 °F) represents the hypothetical temperature of the Earth without an atmosphere. Comparing it to the actual average temperature of the Earth, around 15 °C (or 59 °F), we can see that it is significantly colder. The presence of the atmosphere is crucial for trapping heat through various greenhouse gases, such as carbon dioxide and water vapor, which maintain a habitable temperature range on Earth. Without the atmosphere's greenhouse effect, the Earth's temperature would be much colder, emphasizing the vital role played by our atmosphere in sustaining life on the planet.

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A gravitational force is always attractive in nature and a magnetic force is attractive in nature between two opposite poles and repulsive in nature between two same pole.

Gravity and magnetism are not the same thing. These two ideas or expressions are entirely dissimilar from one another. Despite the fact that both are regarded as forces, they are two distinct forces with various traits and features.

First of all, gravity works between two objects regardless of their composition because it is a separate force. There will be gravitational forces between the items as long as they have mass. Any two things will be drawn toward one another by gravity or another gravitational force if they have mass.

Magnetism, on the other hand, mostly depends on the unique characteristics of the object. There are two directions for the magnetic force. It has the power to draw things together as well as away from one another. The orientation of the electrons inside the items also affects how magnetism behaves. With gravity and gravitational force, this is not the case.

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Answer:

11.3

Explanation:

Answer

  96mph

Explanation:

You are given "144 miles in 90 minutes" and what you need to figure out is "144 km in X hours." To go from 90 min to hours, you can do 90 min * 1hr/60min = 1.5 hrs or 144 km in 1.5 hrs or 144 km per 1.5 hours. 144/1.5 = 96.

Answer:

16.64 km/h

Explanation:

Think of the x and y components as the a and b sides of a triangle and simply do the Pythagorean Theorem:

\(a^2+b^2=c^2\)

\(14^2+9^2=c^2\)

\(\sqrt{196+81}=c\)

\(\sqrt{277}=c\)

\(16.64 km/h\)

25,06 kJ of energy must be added to a 75 g block of ice.

The heat absorbed by one mole of a substance when it changes from a solid to a liquid is known as the molar heat of fusion

ΔHfusion(H₂O) = 6,01 kJ/mol.

T(H₂O) = 0°C.

m(H₂O) = 75 g.

n(H₂O) = m(H₂O) ÷ M(H₂O).

n(H₂O) = 75 g ÷ 18 g/mol.

n(H₂O) = 4.17 mol.

Q = ΔHfusion(H₂O) · n(H₂O)

Q = 6,01 kJ/mol · 4.17 mol

Q = 25.06 kJ.

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The true statements about the Milky way are

A. The Milky Way has two major arms.

B. The Milky Way has globular clusters.

D. The Milky Way is mostly dark matter.

What is Milky Way galaxy ?

The Milky Way can be defined as a huge collection of stars, dust and gas.

If we view it from the top or bottom, it look like a spinning pinwheel , so its shape is spiral not elliptical .

The Sun is located on one of the spiral arms, about 25,000 light-years away from the center of the galaxy.

The milky way has two major arms that are :

(i) Scutum-Centaurus and (ii) Perseus .

About 95% of mass of Milky Way galaxy is invisible and does not interact with light. It is made of mysterious substance called as dark matter .

Therefore , the true statements are (a) , (b) and (d) .

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Answer:

If you put the metal extract into the water there will be no reaction but if you put it into the acid it will liberate H2 (hydrogen gas) Hence it is the difference

Explanation:

this should sum it down

Answer:

the answer is 1, oil and water

Answer:

It is oil and water i took the quiz and got it correct !

Hope this helps you! :D

The direction of the force from wire 1 on wire 2 is attractive, as the two currents are in the same direction.

If two currents are flowing in the same direction and the forces between the wires are attractive, then the direction of the force on wire 2 due to wire 1 will be towards wire 1. This is because the magnetic field created by the current in wire 1 will induce a magnetic field in wire 2, and the interaction between these two magnetic fields will result in an attractive force between the wires.

In summary, if two currents are flowing in the same direction and the forces are attractive, the direction of the force on wire 2 due to wire 1 will be towards wire 1.

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Answer:

Acceleration occurs when an object changes its VELOCITY or DIRECTION or both.

Explanation:

Answer:

When the velocity of an object changes it is said to be accelerating. Acceleration is the rate of change of velocity with time. ... Acceleration occurs anytime an object's speed increases or decreases, or it changes direction. Much like velocity, there are two kinds of acceleration: average and instantaneous. answer velocity or direction.

hope this helps!

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

According to the question, two identical waves undergo pure constructive interference, resultant intensity is quadruple individual wave intensity.

When two or even more sound waves are present at once from distinct sources, they interact with one another to create a new wave. The combination of all previous waves results in the new wave. Interference is the term for wave interaction.

The reflecting light from an oil coating floating on water is one of the best illustrations of interference. Another illustration is the thin coating of a soap bubble (shown in Figure 1), which, when illuminated by either natural or synthetic light sources, reflects a variety of lovely colors.

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Check if the draft pressure switch is closed when troubleshooting an induced draft gas furnace if the induced draft fan comes on but the igniter is never energized.

When troubleshooting an induced draft gas furnace, if the induced draft fan comes on but the igniter is never energized, one should check the draft pressure switch. The draft pressure switch is used to verify that the correct amount of airflow is present to ensure safe combustion. If the switch is closed, the fan will be energized, allowing it to bring in the required air and carry it over the heat exchanger. When the switch is open, the fan will not operate, which means that it will not ignite the gas.

If the draft pressure switch is not closed, it may be due to a clogged venting system or improper flue installation. When the venting system is clogged, it will prevent the switch from closing, causing the igniter not to energize. To solve this problem, one should check the venting system to ensure it is free of debris.

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Acceleration will be constant while speed will not. The third option describes the motion.

Force can simply be defined as a pull or push. It is the product of mass and velocity and it is measured in Newton.

If a wooden block resting on a table is given a push, the block of mass m will accelerate with acceleration a and stop due to friction

One of the following options that describe the motion of the block a moment after the push is the third option. That is, accelerates at a positive, constant rate.

Since the block will be accelerating, the speed of the block can never be constant.

Therefore, accelerates at a positive, constant rate is the option that describe the motion of the block a moment after the push.

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The transfer of energy causes atoms and molecules to vibrate more rapidly, which in turn causes matter to heat up.

All electromagnetic waves, including microwaves, are forms of energy that oscillate at specific frequency. When waves interact with matter, they  transfer their energy to atoms and molecules within that matter. This transfer of energy causes atoms and molecules to vibrate more rapidly, which causes the matter to heat up.

Microwaves are particularly efficient at heating water because frequency is in the range that matches natural resonance frequency of water molecules. This means that they transfer energy more efficiently to water molecules, which results in faster heating as compared to other forms of electromagnetic waves.

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Using Ohm's Law, we can find the current in the wire:
I = V/R = 50.0 V / 8.00 Ω = 6.25 A, So the current in the wire is 6.25 A.

To find the power rating of the heater, we can use the formula:
P = VI, where P is the power, V is the potential difference, and I is the current. Plugging in the values, we get:
P = 50.0 V x 6.25 A = 312.5 W
So the power rating of the heater is 312.5 W.Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. This relationship is often represented mathematically as I = V/R, where I is the current through the conductor, V is the voltage applied across the conductor, and R is the resistance of the conductor. In simpler terms, Ohm's law describes the behavior of a resistor or conductor in an electrical circuit, where the current flowing through the circuit is directly proportional to the voltage applied across it, and inversely proportional to its resistance. Ohm's law is an important concept in electrical engineering and is used to design and analyze electrical circuits, as well as to calculate the power dissipation and efficiency of electrical component

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Answer:

True

Explanation:

Transistor use FAR , FAR less energy than vacuum tubes....your computer probably has over a MILLION transistors in it....can you imagine the power that many vacuum tubes would require?  

Answer:

the answer is 100%!

your welcome

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 0.17 g/cm³

1 mL = 1 cm³

12 mL = 12 cm³

So we have

mass = 0.17 × 12

We have the final answer as

Hope this helps you

If the highest Doppler shifted frequency present in a signal exceeds half the pulse repetition frequency, aliasing will occur.

Aliasing is a phenomenon that occurs when a signal is undersampled or improperly sampled, leading to an incorrect interpretation of the frequency content. In the context of the Doppler effect and pulse repetition frequency, aliasing can happen when the highest Doppler shifted frequency exceeds half the pulse repetition frequency.

This is known as the Nyquist criterion, which states that to avoid aliasing, the sampling frequency should be at least twice the highest frequency present in the signal.

In the case of Doppler shifted frequencies, if the highest Doppler shifted frequency exceeds half the pulse repetition frequency, it means that the sampling rate is insufficient to accurately represent the signal, and aliasing occurs.

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The tension connecting both boxes in terms of T1 can be explained as follows:Tension, T is defined as the force experienced by a string, rope, cable or wire, etc., when pulled from either end. For instance, if the string is connected to two boxes with masses m1 and m2 on a frictionless surface, the force acting on the string would be the tension, T.

Here, the string would connect both boxes, thus the tension, T, in the string would be the same for both boxes.If the two boxes are accelerating uniformly, then the tension, T1 acting on the smaller box m1 would be equal to the force that is causing its acceleration.

From the above equations, the tension, T1 can be determined as shown below:T1= m1a+m1g= (m1/2)g+m1g= (3m1/2)g, Therefore, Tension connecting both boxes, T= T1= (3m1/2)g.The above equation shows the tension connecting both boxes in terms of T1.

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Answer:

a) 756.64 ft

b) 30 degrees

c) 29.27 degrees.

Explanation:

We can represent the situation as follows:

So, we can find the magnitude of the displacement (the green line) using the Pythagorean theorem. Then:

Then, the angle of the displacement can be approximate finding the angle θ. So, using a protractor on the figure, we get that θ is approximately 30 degrees.

Now, we can find the direction using a trigonometric function as:

Because 370 is the opposite side and 660 is the adjacent side. Therefore, the value of θ is:

So, the answers are:

a) 756.64 ft

b) 30 degrees

c) 29.27 degrees.