1.When I cook an egg in a microwave oven, the device uses electromagnetic energy to increase the kinetic energy of particles of matter in the egg.

2.Many stoves and ovens have exhaust fans overhead to remove the rising warm air from the kitchen. The thermal energy is added to air and it rises.

3.When I cook an egg in a pan, thermal energy is transferred as the egg touches the hot surface of the pan. The thermal energy is transferred as objects touch.



choose which one are Conduction, Convection or Radiation

The first reason is that in the past humans didn't necessarily see the connections between the oceans and thus labelled them that way separating them into 5 oceans and the names stuck to this day.

Secondly, while all the oceans of the world constitute one large Ocean, people need some way to identify each part of it since it is easier to think when we have different categories instead of one large category.

Hope that helped!

Answer:

The work done to the block

See

Workdone is Force×Displacement .

Also work done is total mechanical energy of body

Mechanical energy=Kinetic energy

So option C is correct

Answer: I's either A. Matter no longer exists or D. Particles no longer move

Explanation:

Sorry if I get it wrong

Hope his helps :)

Answer:

d

Explanation:

Answer:

Explanation:

The formula for calculating the magnitude of the resultant vector is expressed as;

[tex]R = \sqrt{(\sum Fx)^2+(\sum Fy)^2}[/tex]

[tex]\sum Fx[/tex] is the sum of distances along the x component

[tex]\sum Fy[/tex]  is the sum of distances along the y component

[tex]\sum Fx = 45 cos 25^0\\\sum Fx = 40.78m\\\\\sum Fy = -45 sin 25^0+30\\\sum Fx = 10.98m\\[/tex]

[tex]R = \sqrt{(40.78)^2+(10.98)^2}\\R = \sqrt{1663.0084+(120.61)}\\R = \sqrt{(1783.6184}\\R = 42.23m[/tex]

Hence the magnitude of the resultant vector is 42.23m

Answer:

NO

Explanation:

Answer:

5ms^-2

Explanation:

F = 20N, m = 4.0kg, a = ?

Using the formula for Force

F = ma

Then making acceleration the subject of the formula

a = F/m

a = 20N/4.0kg

a = 5ms^-2

The rating of the transformers primary and secondary currents will be 360.8A and 180.4A.

From the information given, the rating of the transformer bank is given as 300kVA. The full load primary current will be:

✓3 × V × I = 300 × 10³

✓3 × 480 × I = 300 × 10³

I = 360.8A

Also, the secondary load current will be calculated thus:

Transformation ratio = 240/480 = 0.5

Load current = 360.8 × 0.5

= 180.4 A

In conclusion, primary and secondary currents will be 360.8A and 180.4A.

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Answer:

Heat

Explanation:

Heat. The thermal energy that flows from one substance to another when the substances differ in temperature. Thermal equilibrium. The state in which no thermal energy transfer occurs because both substances are at the same temperature. Specific heat.

Heat is the thermal energy that flows from one substance to another when the substances differ in temperature.

Thermal energy is the term used to describe the energy present in a system that is responsible for setting its temperature.

Here,

The average kinetic energy of the particles in a material is measured by its temperature. The overall kinetic energy of the particles in a material is measured by thermal energy.

The temperature and thermal energy of a material increase with the particle velocity.

The amount of thermal energy that is transferred from one media or object to another, or from an energy source to a medium or object, is measured in terms of heat.

Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.

The heat energy may be transformed into other types of energy, such as mechanical, kinetic energy, etc.

Hence,

Heat is the thermal energy that flows from one substance to another when the substances differ in temperature.

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#SPJ5

Answer:

Explanation:

The NISP of the bones found in the park is 22. 2. The bones that belong to the axial skeleton is the 3 skulls, and the bones that belong to the appendicular skeleton are the 6 femora, 4 hip bones, 2 humerus, 2tibiaes, and 5 scapula bones.

Hope it helps....  :)

Answer:

The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

Explanation:

Acceleration be a

Apply Newton's second law

[tex]\\ \rm\Rrightarrow F=ma[/tex]

[tex]\\ \rm\Rrightarrow a=\dfrac{F}{m}[/tex]

[tex]\\ \rm\Rrightarrow a=\dfrac{84}{12}[/tex]

[tex]\\ \rm\Rrightarrow a=7m/s^2[/tex]

[tex] \huge\bf\underline{solution}[/tex]

Mass of given body (m) = 12Kg

Force (F) = 84.0N

We have been asked to find the magnitude of of the acceleration .

[tex] \huge\bf\purple{force = mass \times acceleration}[/tex]

Put all the given value we get

[tex] \sf \dashrightarrow84 = 12 \times acceleration \\ \\ \sf \dashrightarrow \frac{84}{12} = acceleration \\ \\ \sf \dashrightarrow7 {ms}^{ - 2} = acceleration[/tex]

So, the acceleration due to gravity on that planet is 7m/s² .

So Your answer is B) 7.0m/s²

Answer: A

Explanation:

The photoelectric effect was first proposed by Einstein. He claimed that when a light wave comes in contact with an electron, it has the ability to strip that electron from its atom. It depends on how much energy the light wave is carrying, and what type of atom the light is hitting. We use the photoelectric effect in garage motion sensors.

Answer:

Permissive - allowing or characterized by great or excessive freedom of behavior.

Explanation:

Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!

Answer:

148

Explanation:

you have to add 28+35+65

Answer:

Explanation:

How much energy does it take to heat 1 kg of water?

The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down fastest because it doesn't take much energy to change its temperature.

Answer: 0.5

mass=50

volume=25

25/50=0.5

Explanation:

speed =frequency *wavelength

frequency=1/2

=0.5Hz

speed=0.5*100

50m/s

The text that can be inferred from the map is about the crops that are gotten from Africa and how agriculture can be developed in the area.

It should be noted that agriculture simply means the planting of crops and rearing of animals for human use.

In this case, the text that can be inferred from the map is about the crops that are gotten from Africa and how agriculture can be developed in the area.

The use of irrigation, and nomadic herding can be sent in Africa. Therefore, this can be the central idea in the text.

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Answer:

Who was involved in the listed keys on the map provided?

What happened to symbols representing goods and resources that come from Africa?

When did commercial plantation agriculture, irrigated agriculture, livestock raising, and Nomadic herding occur in Africa?

Where did cocoa, coffee, rice, and rubber cone originate in Africa?

Why did Africa transpire as commercial plantation agriculture, irrigated agriculture, livestock raising, and Nomadic herding?

How did it change over time?

Explanation:

Answer:

12m / 7.3*10^-2m/cy = 164.38 cycles.

164.38cy / 2cy/s = 82.2s.

Explanation:

Answer:

a) 6m/s, 0m/s, -6m/s

b) 16m, 25m, 16m

Explanation:

For the first part of the problem, use the Kinematic Equation for Final Velocity:

You are looking for the final velocities of the times: 2s, 5s, and 8s (plug those in for t). We also know that the acceleration is going down so it is negative (-2 is plugged in for a). 10 is the initial velocity and it is positive.

For the second part of the problem, use the Kinematic Equation for Displacement:

You are looking for the displacement of the piano at times: 2s, 5s, and 8s (plug in and square at t). Again, the acceleration is negative because it is in the direction of down, so plug -2 in for a. The initial velocity is positive 10. Plugging those numbers in for each variable should get the correct answer.

Hopefully this helped, I went on here in search of an answer and found it out myself and since no one has answered it yet, I'll help someone else out.

Answer:

[tex]a=-3846.46\ m/s^2[/tex]

Explanation:

Given that,

Initial velocity of the ball, u = 22.2 m/s

Final velocity of the ball, v = -14.9184 m/s (minus sign shows opposite direction of motion)

Time for contact, t = 0.00965 s

We need to find the average acceleration of the ball when it is in contact with the ball. The acceleration of an object is equal change in velocity per unit time. So,

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{-14.9184 -22.2 }{0.00965 }\\\\a=-3846.46\ m/s^2[/tex]

So, the acceleration of the ball is [tex]3846.46\ m/s^2[/tex] towards the opposite direction of motion.

Answer:

The first and third one

Explanation:

The roughness of the surfaces is very important when determining friction as well as the force pressed on a surfaces as it helps increase friction.

HOPE IT HELPED

Answer:

They both have North and South magnetic poles

Explanation:

No matter how a magnet is made or what material it will have both resistance and attraction

Answer:

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Explanation:

In a stable ecosystem, the number of predators increases if the number of prey increases.

Predators are the species that are dependent upon prey for their foods. predators actually hunt the prey for their food.

predators are the species that depend upon other living species like deer fish goats etc for example lions depend upon deer, zebras, etc.

while the preys are the species who depend upon the plants for their food so if the number of preys will be higher then the number of the predators will also be higher.

Thus In a stable ecosystem, the number of predators increases if the number of prey increases.

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(ahhhggg ignore i dont remember how to delete answers)

No. In my opinion, they were not used creatively. They were used speciously, disingenuously, and unimaginatively.

As always, others are free to disagree.

With Georgia's motorcycle at  over 4.5 m long and having a mass of 235 kg, Reid’s tangential speed is mathematically given as

vt=12.4m/s

Generally, the equation for the Conservation of momentum  is mathematically given as

mn=m1+m2

Therefore

mn=235+72

mn=307

Therefore

Fc=mn*a

THerefore

[tex]vt=\sqrt{\frac{rFc}{mn}}\\\\vt=\sqrt{\frac{25*1850}{307}}[/tex]

vt=12.4m/s

In conclusion, The tangential  speed is

vt=12.4m/s

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