Question 25 of 25
How do changes in light wavelengths support the most widely accepted
ideas about the universe?
O A. Galaxies are moving away from Earth, as shown by the shift of
their light toward the red end of the spectrum.
B. Galaxies are moving toward Earth, as shown by the shift of their
light toward the blue end of the spectrum.
OC. Galaxies are moving away from Earth, as shown by the shift of
their light toward the blue end of the spectrum.
OD. Galaxies are moving toward Earth, as shown by the shift of their
light toward the red end of the spectrum.

Answer:

Newton (N)

Explanation:

Newtons are used to measure force.

Answer:

They need carbon, sunlight and water.

Explanation:

Answer:

1 meter for this wave

Explanation:

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

Answer:

cohesive properties

Explanation:

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

Answer:

Cohesive properties

Explanation:

Answer:

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

Explanation:

If air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

The vertical velocity of the ball is calculated as follows;

[tex]h = v_yt - \frac{1}{2} gt^2\\\\7.5 = (3.5)v_y - \frac{1}{2}(9.8)(3.5)^2\\\\ 7.5 = 3.5v_y - 60.025\\\\3.5v_y = 67.525\\\\v_y = 19.29 \ m/s[/tex]

X = Vxt

Vx = (X)/t

Vx = (70)/3.5

Vx = 20 m/s

v = √(Vy² + Vx²)

v = √(19.29² + 20²)

v = 27.79 m/s

tanθ = (Vy)/(Vx)

tanθ = (19.29)/(20)

tanθ = 0.9645

θ = 43.96⁰

The time of flight is calculated as follows;

[tex]T = \frac{2u \times sin(\theta)}{g} \\\\T = \frac{2 \times 27.79 \times sin(43.96)}{9.8} \\\\T = 3.9 \ s[/tex]

X = VxT

X = 20 x 3.9

X = 78 m

The ball will land on green which is at 70 m after 3.5s.

Thus, if air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

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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

Answer:

Double-replacement

Explanation:

2Li + CaCl2 → 2LiCl + Ca O

D. Double-replacement

Angular frequency in radian per second for 20 vibrations in 10 seconds is 12.6 rad/s

Angular frequency is the number of vibrations in radian per second.

The total number of vibrations n is 20 and the time taken for these vibrations is 10 s

The frequency of the vibrations will be

f = 20 / 10 = 2 Hz

Angular frequency is related to the frequency as

ω = 2πf

ω=2π × 2

ω = 12.6 rad/s

Thus, the angular frequency is 12.6 rad/s.

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Why is the moon’s force of gravity less than that of the earth?

Since the moon has a smaller mass than the earth, the moon has less gravity than the earth. Gravity is related to mass.

Larger mass = larger gravity

Smaller mass = lesser gravity

Moon has small mass, therefore less gravity.

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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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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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:

The answers to your questions are as written below:

A negatively charged molecule move inwards when placed in an electric field while positively charged molecule placed in a electric field will move outwards the electric field.

A neutral/uncharged molecule will remains still when placd in an elctric field due to the absence of charges.

Hence we can concude that the answers to your questions are as listed above.

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attached below is the missing image

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

Explanation:

Answer: Hyrdrogen and Helium.

Explanation:

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:

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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from

∆H=MC∆T

but M=1Kg=1000g

∆T=10°C

C=0.466J/g°C

∆H=(1000×0.466×10)Joule

=4660J

explanation

When heat energy is added to a substance, the temperature will change by a certain amount. The relationship between heat energy and temperature is different for every material, and the specific heat is a value that describes how they relate.

heat energy = (mass of substance)(specific heat)(change in temperature)

Q = mc∆T

Q = heat energy (Joules, J)

m = mass of a substance (kg)

c = specific heat (units J/kg∙K)

∆ is a symbol meaning "the change in"

∆T = change in temperature (Kelvins, K

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 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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Answer:

Sound waves are able to go throught some objects.

Explanation:

Answer:

Dont kno

Explanation:

Dont  

Answer:

4.2 into the atmosphere

Explanation:

Carbon movement into atmosphere :

Carbon movement in the sinks :

Net Carbon Movement :

Answer:

The x - component of the normal force is equal to 1706.45 N.

Explanation:

To solve the problem, and since there is no additional information, we can safely assume that the x-axis is parallalel to the hill surface and the y-axis is perpendicular to the x-axis. Knowing that, we can calculate the components of the normal force (or weight for this case), using the following formulas:

[tex]N

x

=W∗Sin(α)=mg∗Sin(α)[/tex]

[tex]N

y

=W∗Cos(α)=mg∗Cos(α)[/tex]

Now, using the given information, we have:

[tex]mass=m=1150Kg[/tex]

[tex]a=8.70[/tex]

[tex]g=9.81 \frac{m}{ {s}^{2} } [/tex]

Calculating, we have:

[tex]N_{x}=mg*Sin(\alpha)[/tex]

[tex] \: \: \: \: \: \: \: \: \: N_{x}=1150Kg*9.81\frac{m}{s^{2}}*Sin(8.70\°)[/tex]

[tex]N

x =11281.5

s

2

Kg.m

∗Sin(8.70\°) = \\ \\ 1706.45

s

2

Kg.m

=1706.45.23N[/tex]

Hence, we have that the x-component of the normal force is equal to 1706.45 N.

Answer:

zero

Explanation:

fx=

Answer:

An object that weighs 20 kg

Explanation:

Acceleration and mass are indirectly proportional.

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)