I need help with my homework please? I will give a lot of points and a brainlist.

Answer:

3.6 s

Explanation:

100 km/hr =27.77 m/s

100/27.77=3.6 sec

Answer:

The difference phase = 3 λ

In terms of wavelength the difference of phase is zero so the sources would experience "constructive" interphase at that point.

If the light from the sources differed by 1/2, 3/2, 5/2 wavelengths  etc, then the sources would be out of phase at that point.

Multiple point perspective is a system of perspective in which: A. there are a number of vanishing points, usually created by multiple objects.

Multiple point perspective can be defined as a system of perspective in which each items (objects) has a number of interacting lines with different vanishing points.

This ultimately implies that, a multiple point perspective is a system of perspective which is created with a number of vanishing points, that are usually created by multiple objects.

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Answer:

A

Explanation:

Answer:

D. they transfer thermal energy due to convection

In a building, air moves due to currents caused by temperature differences. They transfer thermal energy due to convection. this statement best describes these currents. Hence option D is correct.

Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature. Absolute scale of temperature means Kelvin scale of temperature. relation between Kelvin(K) and centigrade (°C), °C= K - 273.15 from equation, 273.15 K means 0 °C, which is freezing point of water (ice). when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position. Amplitude of vibration get increases as we go on increasing temperature and for higher temperature force of attraction between molecules gets weaker. Hence for higher temperature, due to weaken the force of attraction between molecule, solid goes into liquid state. and further increase in temperature liquid goes into gaseous state.

Hence option D is correct.

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Answer:

a large elliptical galaxy

Explanation:

Answer:

90 watts

Explanation:

Formula for Power (using voltage and current) :

Answer:

90 watts

Explanation:

Watts = volts x amperes

120X.75 = 90

Explanation:

formula is given by

h/mv

where h is 6.626 × 10 ^-34

and c = 3 × 10^8

m = mass

by plugging in the values in the formula, the de Brogile wavelength is equal to 7.6424 × 10^(-15)

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Answer:

A. Greenhouse gases

Explanation:

Because nuclear fission involves the modification of atoms.

Answer:

Greenhouse gases, because in nuclear fission, we are talking about modifying strictly atoms to get a reaction, therefore it would not make sense for greenhouse gases to be a reaction.

Thermal energy from the injured area transfers to the ice and the thermal energy transferred in this scenario is conduction.

Conduction heat transfer is the transfer of heat through matter such as  solids, liquids, or gases without bulk motion of the matter.

The  ice pack absorbs the heat energy without the actual movement of the molecules of the ice pack.

Thus, thermal energy from the injured area transfers to the ice and the thermal energy transferred in this scenario is conduction.

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Answer:

1. What is the best description of thermal energy?

B) Thermal energy is the energy in matter due to the movement of its atoms and/or molecules.

2. An athlete hurts their wrist. They put an ice directly on the wrist. In which direction is the thermal energy moving?

B) The thermal energy is moving from the wrist to the ice pack.

3. What happens when two substances with different temperatures come into contact?

B) Thermal energy is transferred from the warmer substance to the cooler substance.

4. Which is the best description of what happens when thermal energy is removed from a substance?

B) Its particles lose kinetic energy and move more slowly.

5. Which of the following is typically part of the knowledge base of research and development scientists working on heating devices?

A) substances and their properties

Explanation:

i just finished the quick check

When two charged plates are separated by a distance, the potential difference between the plates is 54 Volts.

The electric field intensity which does not increase or decrease with time or remain constant is called the uniform electric field.

Given is the plates separated by distance d = 15 cm =0.15 m, electric field E= 360 N/C.

The relation between the electric field and voltage is

E=V/d

Substitute the values into the expression to get the potential difference V,

V = 360 x 0.15

V = 54 Volts

Thus, the potential difference between the plates is 54 Volts.

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There are many Autotrophs than consumers because : Autotrophs are the bases of any food chain/web

Autotrophs capture the energy required for every food chain or web from which sustains other organisms in the food chain form sunlight and chemicals. Also there is always more biomass present in the lower levels of the trophic system as biomass decreases as we move up the food chain.

Since autotrophs are producers, for a healthy food chain there would be more autotrophs than consumers.

Hence we can conclude that There are many Autotrophs than consumers because : Autotrophs are the bases of any food chain/web

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Velocity is defined as total displacement occurrence by the given time interval, and since it's a Vector quantity it has direction as well.

So, the correct choice will be ~ B. 125 m/ East

Because it has unit of Velocity ( that is - m/s ) and it shows direction of displacement ( that is - East )

(a) The relative velocity If those trucks move at the same time from the same place is 35 m/s.

(b) The distance between them after 2 minutes ​ is 4,200 m.

The relative velocity of the two truck is calculated as follows;

Vr = 20 m/s - (-15 m/s)

Vr = 20 m/s + 15 m/s

Vr = 35 m/s

d = Vr(t)

d = 35(2 x 60 s)

d = 4,200 m

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the branch of optics that studies interference, diffraction, polarization, and other phenomena for which the ray approximation of geometric optics is not valid.

Answer:

A force of μk⋅60N is needed to keep a 60-newton rubber block moving across level, dry asphalt in a straight line at a constant speed.

Explanation:

Answer:

option C) the iris

Explanation:

2023

we can use 3 formula for inclined plane

W=-ΔPE

W=ΔKE

W=mg sinθ. d

let's use the third formula

sinθ = 1.2 : 3

sinθ = = 0.4

W = m.g. sinθ. d

W = 110 x 10 x 0.4 x 3

W = 1320 J

a) For Diagram refer to the attachment.

b) The colour that dispersed most is violet.

c) Every colour has its own wavelengths/ frequency. Different colours move with same speed in air / vaccum. But their speeds in refracting media like glass are different. Therefore, refractive index of the medium for different colours is different. Some gets strongly dispersed due to shorter wavelengths.

Explanation :

Coal, followed by gas is the largest source of electricity

Coal is the world’s biggest source of electricity production.

The world's biggest source of electricity production is Coal. Coal is a fossil fuel that is mined from the ground and is the largest source of energy for the generation of electricity worldwide. Coal is burned to produce heat, which is then used to boil water and produce steam. The steam drives turbines that generate electricity.

There are other sources of electricity as well, such as natural gas, nuclear energy, hydroelectric power, and renewable energy sources like wind and solar power.

However, coal is the largest source of electricity production in the world.

The final temperature of the mixture after thermal equilibrium is reached given the data is 40.4 °C

Heat loss = Heat gain

MC(T – Tₑ) = MᵥᵥCᵥᵥ(Tₑ – Tᵥᵥ)

40.1 × 0.45(652 – Tₑ) = 328 × 4.184(Tₑ – 32.4)

18.045(652 – Tₑ) = 1372.352(Tₑ – 32.5)

Clear bracket

11765.34 – 18.045Tₑ = 1372.352Tₑ – 44464.2048

Collect like terms

11765.34 + 44464.2048 = 1372.352Tₑ + 18.045Tₑ

56229.5448 = 1390.397Tₑ

Divide both side by 1390.397

Tₑ = 56229.5448 / 1390.397

Tₑ = 40.4 °C

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Answer:

Warm moist air, hope this helps

Answer:

A heat source high enough to boil the water and the water itself

Explanation:

x max = (vi² sin 2α) / g

x max = (6.25² sin 90)/10

x max = 39.0625/10 = 3.91 m

149,597,871 kilometres

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Answer:

It's D, they're all radioactive. This is due to the molecules that it is made up of

Answer:

the answer is A

Explanation:

I hope it helps you

Answer:

The gravitational force on the moon is less than on Earth because the strength of gravity is determined by an object's mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere. We just feel it in different ways depending on our state of motion.

Explanation:

Hope this helped!!

Answer:

Let β = v / c          

proper time Δt'  is measured in a frame at the same place in a given frame - the proper time is measured in spaceship II moving at .28 c

a) spaceship I is moving at (.6 - .28) c = .32 c relative to proper time

Δt = Δt' / (1 - β^2)^1/2      as measured by students in ship I

Δt = 50 / (1 - .32^2)^1/2 = 52.8 m        measured by students

b) Δt = 50 / (1 - .28^2)^1/2 = 52.1 min  time elapsed for observer on earth

The sound produced by an instrument of length L that is open at one end posses has a high frequency.

Sound is kind of vibration which travels in the form of sinusoidal wave through a medium which can be solid, liquid or gas/air.

Sound produced by an instrument which has an open end has a high

frequency and pitch, nodes , timbre and a low antinode. These are all the characteristics of a sound produced by the instrument.

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Answer:

Warm air is less dense than cold air, and warm air holds more moisture than cold air.

Explanation:

HOPE THIS HELPS AND HAVE A NICE DAY <3

Answer:

No

Explanation:

It will never decay to zero

after one half life there is 1/2 left

  after the next half life thee is   1/2 * 1/2 = 1/4 left

     then 1/8th    then  1/16 th   then   1/32     1/64     1/128 ........to infinity  

        while htere is a VERY small amount left , there will never be ZERO left

Answer:

b

Explanation:

The formula for work done (W) is:

W = Force x Distance moved in the direction of force

This means that the object needs to move in the direction of the force, otherwise no work is done in that direction.

Hope this helps!