The correct answer is 40 or - 40??

Answer:

0 J

Explanation:

Work is the product of force applied and the distance moved by the object.

In this case, the force applied on the refrigerator is 1500 N

The refrigerator did not move, thus no distance , hence distance is zero

The formula for work done:

W = F*d

W= 1500 * 0

W= 0 J

Answer:

v= 18.5 m/s

Explanation:

       [tex]F_{cent} = F_{g} - F_{n} (1)[/tex]

       [tex]F_{cent} = m*\frac{v^{2}}{r} (2)[/tex]

       [tex]F_{n} = F_{g} - m*\frac{v^{2}}{r} (3)[/tex]      

        [tex]0.9*F_{g} = F_{g} - m*\frac{v^{2}}{r} (4)[/tex]

The velocity the occupants of the car appear to weigh 10% less than their normal weight is 18.52 m/s.

The given parameters:

Apply the principle of conservation of energy to determine the velocity the occupants of the car appear to weigh 10% less than their normal weight;

[tex]F_c = mg\\\\\frac{mv^2}{r} = mg\\\\v^2 = gr\\\\v = \sqrt{gr} \\\\v = \sqrt{0.1 \times 9.8 \times 350}\\\\v = 18.52 \ m/s[/tex]

Thus, the velocity the occupants of the car appear to weigh 10% less than their normal weight is 18.52 m/s.

Learn more about velocity of a banked road here: https://brainly.com/question/14777525

Answer:

2.09 rad/s

Explanation:

Given that,

A toy car makes 4 laps in 12 s.

We need to find the angular velocity of the toy car. We need to find the angular velocity of the toy car.

4 laps = 25.13 rad

So,

[tex]v=\dfrac{25.13\ rad}{12\ s}\\\\v=2.09\ rad/s[/tex]

So, the angular velocity of the toy car is 2.09 rad/s.

Answer:

400 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 5 kg

Height (h) = 8 m

Workdone (Wd) =?

Workdone by gravitational force is given by the following equation:

Wd = mgh

Where:

Wd => is the Workdone.

m => is the mass of object

g => is the acceleration due to gravity

h => is the height to which the object is located.

With the above formula, we can obtain the workdone as follow:

Mass (m) = 5 kg

Height (h) = 8 m

Acceleration due to gravity (g) = 10 m/s²

Workdone (Wd) =?

Wd = mgh

Wd = 5 × 10 × 8

Wd = 400 J

Thus, the workdone by gravitational force is 400 J

Explanation:

u = 0m/s

v = 30m/s

a = 2m/s²

Using Kinematics, we have v = u + at.

Therefore t = (v - u) / a

= (30 - 0) / (2) = 15 seconds. (B)

Answer:

b

Explanation:

it compresses hot air turning into cool air almost like a reverse tornado

Answer:

It increases the pressure and temperature of the refrigerant.

Explanation:

The purpose of the compressor is to circulate the refrigerant in the system under pressure, this concentrates the heat it contains. At the compressor, the low pressure gas is changed to high pressure gas.

Answer:

The correct option is B.

away from each other (they repel)

Explanation:

This because when current flows in opposite direction in wire, the electrons in them are at high density or electrons in the wires will be at high density which is as a result of contraction of the length due to relativistic of the length, this make the wires to move away from each other or repel.

Answer:

[tex]Impulse = 8.0Ns[/tex]

Explanation:

Given

[tex]Force = 80.0N[/tex]

[tex]Mass = 0.25kg[/tex]

[tex]Time = 0.10s[/tex]

Required

Determine the impulse

The impulse is calculated as follows:

[tex]Impulse = Force * Time[/tex]

Substitute values for Force and Time

[tex]Impulse = 80.0N * 0.10s[/tex]

[tex]Impulse = 8.0Ns[/tex]

Hence, the impulse experienced is 8.0Ns

Answer:

max

Explanation:

because its right 90/7

Answer:

79 I believe! don't mind the rest sjjdjdiwowjekwhfjdoaoqhenfixiwnsodjd djdjsiwuwieodjskrkf

Answer:

yes it is possible

Explanation:

if the body is travelling with uniform speed in a circular track its speed remains the same but the velocity is non-uniform as the direction of the body is changing every time.

eg: a body in uniform circular motion has constant speed but its velocity changes at every point during the course of motion. Whenever, the direction changes, velcoity changes.

Answer:

283.15

Explanation:

looked it up

there's a handy calculator

Answer: C.

283 K

Explanation: edmentum

Explanation:

Amount of heat supplied (Q) = 24500 J

Mass (m) = 2 kg

Initial temperature (t1) = 20 ° C

Final temperature (t2) = 35 ° C

Difference in temperature (dt) = t2 - t1 = ( 35 - 20) °C = 15 ° C

Now Specific heat capacity (S) = ?

We know we have the formula;

Q = m * s * dt

24500 = 2 * s * 15

24500 = 30 S

S = 24500 / 30

S = 816.67 J / Kg ° C

The specific heat capacity is 816.67 J/kg°C.

Hope it will help :)

Answer:

D

I hope these is correct

A matter may exist as a solid, liquid, or gas. Matter is made up of atoms. The correct options are A and C.

In physical laws and general chemistry, matter is any material that has mass and occupies space by having volume.

It has something to do with weight. Atoms, which are made up of subatomic particles, make up the vast majority of matter in the universe.

Even all organisms is made up of matter, whether they are living or non living.

Matter is significant as though it build up all the things present in person's environment. Matter can neither be generated or be destroyed as it can only be transmuted into some another form.

The quantity of matter in a physical existence is renowned as mass. When a net force is exerted, it also characterize the body's inertia, or resistance to acceleration.

A substance can exist as a solid, liquid, or gas. Atoms are the building blocks of matter.

Thus, the correct options are A and C.

For more details regarding matter, visit:

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astronomers have a difficult time viewing stars and galaxies millions or billions of light years away because they're just so far away. based on the number of light years they are away, that number represents how long the light from that object took, in order to reach that astronomers eyes. so in reality, they're looking at the past when studying objects that insanely far away. if a star is 1 million light years away, that means the light from that star will take 1 million years to reach your position. so considering the distance that an object is in space and relative to an astronomers position, it's quite expected for it to become harder to view. the farther an object is from sight, the harder it is to see.

i hope this helps!

Answer:

While different religious groups like Hinduism, Sikhism, Jainism, and Buddhism belief in reincarnation and that a person has the chance to be reborn as a new person, depending on how the current life is, Christianity holds a different belief in that there is no reincarnation per se, but there is an afterlife with God for eternity in His kingdom.

Explanation:

The basic concept of reincarnation is a belief held by major religions of the world such as Hinduism, Jainism, Buddhism, and Sikhism. This philosophical belief holds that there is a rebirth or transference of an aspect of a person, be it the soul or mind or any subconscious to a different entity after one dies.

While Christianity does not specifically belief in reincarnation, it does hold the belief that the physical or bodily death of a person is not the end of that person. Rather, Christians belief in the afterlife, a life of eternity with God in His kingdom. This is not the same as reincarnation, for it involves no such rebirth as some other animal or even into a new person or being.

Thus, the Christian belief of afterlife is much different from the other religious beliefs of reincarnation.

Explanation:

Here two internal resistances are in parallel so equivalent internal resistance r

eq

=1∣∣1=

1+1

1×1

=1/2=0.5Ω

According to maximum power theorem the power will be max when internal resistance is equal to external resistance. since, r

eq

=R=0.5Ω

Maximum current through R is I

max

=

r

eq

+R

V

=

0.5+0.5

2

=2A

Maximum power is P

max

=I

max

2

R=2

2

×0.5=2W

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Answer:

Endothermic

Explanation:

Answer:

mass*velocity=1.5*10^4 * 15

= 22.5*10^4

Answer:

B

Explanation:

Hhhhh

Answer:

efficiency can be expressed in terms of power.

If so, power=force*velocity

P= (mass×gravity)*velocity

p= 1600×9.81×37

p=580752

Answer:

x = 9.87 hours ago.

Further explanation is present below.

Explanation:

Data given:

Air Temperature = 26.7°C (81°F)

Body temperature = 34.4°C (93.9°F)

We are given that, Livor mortis was absent. Secondly, The body exhibited some stiffness in the face and eyelids.

So, it can be concluded that, body must have died recently, as Livor mortis was absent plus the presence of stiffness in the face and eyelids. Furthermore,

The normal body temperature = 37°C

Body temperature in our case = 34.4° C

Difference = 37 -34.4 = 2.6°C

And Air temperature = 26.7°C

Which is a very low difference, in addition, it has not acquired the air temperature so, all this evidence certifies that body died recently.

Now, we have to calculate, how recently it died.

Formula:

0.78 . x = difference of body temperature and air temperature

Where, x = number of hours = time required,

0.78 . x = (34.4 - 26.7)

0.78 . x = 7.7

x = 7.7/0.78

x = 9.87 hours ago.

It means that, naked male corpse was died 9.87 hours ago.

Now, we are asked to find out clothing on the body had made a difference or not.

So, Yes it would definitely make a difference. As body would have more warmer than being naked. and it would result in a calculation of a different time of death. (body temperature would have > 34.4°C)

Explanation:

..........the answer is insulater

Yes, if the mass starts at rest, the change in speed will be equal the final speed, because:

Δv = Vf - Vo

How Vo (Initial velocity) is equal zero, we simplificate:

Δv = Vf

Then, the change of the speed, if the mass starts at rest, will be equal to final velocity.

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