Which factor is the main reason the first spaceships were so large?

a. to improve magnetic levitation
b. to increase the thrust to reach escape velocity
c. to carry more astronauts
d. to carry large amounts of fuel

Answer:

cohesive properties

Explanation:

The property of cohesion allows liquid water to have no tension on the surface.

Answer:

Cohesive properties

Explanation:

Answer:

False

Explanation:

Solid water (ice) has a lesser density than liquid water. Hence, the statement is false.

Answer:

False

Explanation:

Let's know the relationship

Density is indirectly proportional to volume

If volume is less density is more and if volume is more density is less.

But Density also depends on temperature

Higher the temperature higher the density.

Liquid has higher density than solid .

Hubble classification for a spiral galaxy with a small nuclear bulge and wide loosely wound spiral arms is a, b and c.

Galaxy is the collection of stars, interstellar gases, dust and stone in the large space of universe.

Hubble classified these galaxies by referring them as SB galaxies with subclasses a, b, and c. They are just like the normal spirals. The spiral arms in barred spirals don't actually but appear to originate at the ends of the bar.

Hence, Hubble classification for a spiral galaxy with a small nuclear bulge and wide loosely wound spiral arms is a, b and c.

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Answer:

the fusion of hydrogen nuclei or in other words "nuclear fusion"

Explanation:

Answer:

Assess the situation quickly and calmly. Safety: check whether you or the casualty are in any danger. ...

Protect yourself and them from any danger. ...

Prevent infection between you and them. ...

Comfort and reassure. ...

Assess the casualty and give first aid treatment. ...

Arrange for help if needed

Explanation:

Answer:

They need carbon, sunlight and water.

Explanation:

A transformer uses 91 V supply to operate 13 V device, then the current in the primary coil is 0.27A.

A transformer is an electrical device which is involved in transferring electric energy from one AC circuit to another, either stepping up or down.

As, from the ohm's law, voltage is directly proportional to the current flowing through the coil.

I₂ / I₁ = V₂ / V₁

The current from the transformer I₁ is 1.9A, the voltage supply V₁ = 91V and the voltage to operate is 13 V, then the current through the primary coil is

I₂ = (91 / 13 ) x 1.9

I₂ = 0.27A

Thus, the current from the primary coil is 0.27A.

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The force exerted by the output piston will be 20 N. The pressure exerted on the both end is equal.

The force applied perpendicular to the surface of an item per unit area across which that force is spread is known as pressure.

It is denoted by P. The pressure relative to the ambient pressure is known as gauge pressure.

The area of the input cylinder is found as;

A₁=πR₁²

A₁=π(2)²

A₂=4π

The area of the output cylinder is found as;

A₂=πR₂²

A₂=π(4)²

A₁=16π

The pressure exerted on the both end is equal ;]

P₁=P₂

F₁A₁=F₂A₂

80 ×4 π==F₂×16 π

F₂=20 N.

Hence,the force exerted by the output piston will be 20 N.

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The difference between an electrician and an electrical engineer is the way of working towards a common electrical project.

An engineer is a person who performs a function like designing, building, or maintaining engines, machines, or structures.

Electrical engineers and electricians both commonly involved in the process of creating and installing critical electrical systems.

An electrical engineer can design electronics and is familiar with the working of electrical parts.

An electrician is much more like a builder. They take the designs from electrical engineer and follow them to create, repair, or revise actual electrical systems.

Thus,  the difference between an electrician and an electrical engineer is the way of working towards a common electrical project.

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When the outward-directed gas pressure (created by thermal nuclear energy) is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.

The pressure is the force exerted per unit area.

A main sequence star fuses hydrogen in its core and has balanced outward pressure from core nuclear fusion and gravitational forces will be pushing inward.

When the outward-directed gas pressure is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.

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The total energy available during the collision of the two protons is determined as 900,938 MeV.

Based on the principle of conservation of energy, the total energy of the two protons during the collision will be conserved.

Available energy = Er + K

Where;

Available energy = 938 MeV + 900 GeV

Available energy = 938 Mev + 900 x 10³ MeV

Available energy = 938 MeV + 900,000 MeV

Available energy = 900,938 MeV

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Answer:

1 meter for this wave

Explanation:

Amplitude is the height of the wave from the midline to the crest

Frequencies would show resonance will be 30 Hz,45 Hz and 60 Hz. Option B and E are correct.

Mechanical systems and charged particles all have a frequency that they vibrate at. this frequency is referred to as the resonance frequency or natural frequency.

When the matching vibrations of another item enhance the amplitude of an object's oscillations, this is known as resonance.

15 Hz is the fundamental frequency of the string.

Higher frequencies, such as the first overtone, second overtone, third overtone, and so on, must be used to cause the string to vibrate in a resonant manner.

F₁ = 2F₀ = 2 x 15 = 30 Hz is the initial overtone.

F₂ = 3F₀ = 3 x 15 = 45 Hz is the second overtone.

F₃ = 4F₀ = 4 × 15 = 60 Hz is the third overtone.

Hence,frequencies would show resonance will be 30 Hz,45 Hz and 60 Hz. Option B and E are correct.

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Answer:

mg i would say an atomic number of 12 the um i would say stands for micrometer

Explanation:

Answer:

Newton (N)

Explanation:

Newtons are used to measure force.

Answer:

An object that weighs 20 kg

Explanation:

Acceleration and mass are indirectly proportional.

Answer:

4.2 into the atmosphere

Explanation:

Carbon movement into atmosphere :

Carbon movement in the sinks :

Net Carbon Movement :

Answer:

3 benefits of a restrict afterwards a practice Brings essence rate back off and slows respiring Muscles return back to optimum motionless distance Prevents ancestry from combining in lower limits Cool down stretches are used to weaken courage rate and respiring rates afterwards exercise. It can help cause your soul rate back off to situated rate.

Explanation:

[tex]\huge{\boxed{\mathcal{♔︎Answer♔︎}}}[/tex]

200Ω

Explanation:

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⠀⠀⠀⠀❖ Note

⠀

What is resistance?

Resistance is the opposition offered by the electric current.

⠀

What is electric current?

An electric current is the stream of flowing charge moving around a circuit.

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⠀⠀⠀⠀■ Solution

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[tex] \textsf{ As here, we can see in the above diagram} \\ \\ \sf R_1 \: and \: R_2 \: both \: are \: in \: series. \\ \\ \textsf{ So their total resistance will be} \: R_s[/tex]

So for formula for series will be

[tex] \sf R_s = R_1 + R_2 \\ \\ \sf R_s = 100 + 200 \\ \\ \boxed {R_s = 300Ω}[/tex]

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[tex] \sf As \: you \: can \: also \: see \: here , \\ \\ \sf R_s \: is parallel \: with \: R_3 \\ \\ \sf So \: their \: total \: resistance \: R \: will \: be[/tex]

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[tex] \sf \frac{1}{R } = \frac{1}{R_3} + \frac{1}{R_s } \\ \\ \sf \frac{1}{R} = \frac{1}{600} + \frac{1}{300} \\ \\ \sf \frac{1}{R} = \frac{1 + 2}{600} \\ \\ \sf \frac{1}{R} = \frac{ \cancel3}{ \cancel{600} \: \: \small{200}} \\ \\ \sf \frac{1}{R} = \frac{1}{200} \\ \\ \boxed{ \tt{R = 200Ω}} [/tex]

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So the total resistance will be 200Ω.

Answer:

no

actually no one weres the scarf in sunny ʕ•ε•ʔ

Explanation:

The colours we see are the wavelengths that are reflected or transmitted. For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from

The wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.

Speed of wave is the rate by which the wave travels. It can be described as the distance cover by the crest or thrust of it per unit of time. It can be calculated with the following formula,

[tex]v=f\times\lambda[/tex]

Here, (f) is the frequency and (λ) is the wavelength.

The frequency is inverse of time. Thus, the value of frequency in time t is,

[tex]f=\dfrac{1}{t}\\f=\dfrac{1}{4}\\f=0.25[/tex]

The speed of the wave is 0.5 m/s. Put the values in the formula,

[tex]v=f\times\lambda\\0.5=0.25\times\lambda\\\lambda=\dfrac{0.5}{0.25}\\\lambda=2[/tex]

Thus, the wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.

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Sorry but I can't help you cuz the words you use makes no sens if you are going to ask a question pls do and dont joke around about it thank you very much and have a great day! ^^

Answer: The churning nuclear forges at the centres of stars produce light and heat, creating stars.

Explanation:

Answer: Hyrdrogen and Helium.

Explanation:

Hi there!

We can use Faraday's Law to solve:

[tex]\epsilon = N\frac{d\Phi _B}{dt}[/tex]

ε = Induced emf (? V)

N = Number of loops (1 loop)

ΦB = Magnetic flux (Wb)

We know that:

[tex]\Phi_B = \oint B \cdot dA = B\cdot A[/tex]

Since the area of the loop remains the same, we can take this out of the time derivative.

We get:
[tex]\frac{d\Phi_B}{dt} = A * \frac{dB}{dt}[/tex]

Also, since N = 1, we can now rewrite the equation for the induced emf as:
[tex]\epsilon = A * \frac{dB}{dt}[/tex]

dB/dt is equivalent to the change in the magnetic field with respect to time:
[tex]\Delta B = \frac{B_f - B_i}{\Delta t}\\\\\Delta B = \frac{3 - 2}{5} = 0.2 \frac{T}{s}[/tex]

Now, substitute this value into the equation for induced emf:
[tex]\epsilon = \pi (0.3^2) * (0.2) = \boxed{0.0565 V}[/tex]

**Also, since the magnetic field INCREASED out of the page, this change in magnetic flux will create an induced CLOCKWISE current that produces a magnetic field into the page in order to oppose the increase in magnetic flux OUT of the page.

Mechanical work is the work done by a force on a mechanical body like machines .

When some mechanical force is applied on the machine the machine does some work which is mechanical work

It's a scaler quantity and have units as Joules(J)

The main criterion is mechanical energy,Force , Displacement (Not mandatory)

The phenomenon of inducing voltage by changing the magnetic field around a conductor will be Electromagnetic Induction. Option B is correct.

According to Faraday's law of electromagnetic induction, the rate of change of magnetic flux link with the coil is responsible for generating emf in the coil to result in the flow of amount of current .

So in order to increase the current, we need to increase the EMF;

so we can increase it by;

1) Increasing the number of turns

2) Increase the area of the loop

3) By moving the magnet faster

Hence, option B is correct.

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[tex]\text{Given that,}\\\\m_1 = m_2= 15~ kg\\\\r = 35~ m \\\\G = 6.67 \times 10^{-19} Nm^2 kg^{-2}\\\\\text{Gravitational force,}\\\\F_g = \dfrac{Gm_1 m_2} {r^2 }\\\\\\~~~~=\dfrac{6.67 \times 10^{-19} \times 15 \times 15}{35^2}\\\\\\~~~~=1.2252 \times 10^{-19}~N[/tex]

Answer:

The 6 kg cat.

Explanation:

The six killogram cat because accelaratoin due to gravity is more for havy objects then smaller objects. (or lighter I suppose) ;)

Answer:

the cat with a mass of 6 kg

Explanation:

Potential Energy : Weight x Height

PE of cat w/ mass 4 kg :

PE of cat w/ mass 6 kg :

Clearly, the cat with a mass of 6 kg has greater potential energy.