how many moles are there in 18 grams of water​

Explanation:

The correct answer is option B

Answer:

C. When ice melts, it absorbs energy.

Explanation:

When ice melts, it is getting hotter by absorbing energy and changes from a solid to a liquid. This is an endothermic reaction.

Answer:

The larger the number of charges flowing through the wire,the larger is the current flowing in the wire.

Explanation:

if the wire is large then large amount of current flows through the circuit.but if the wire is small then a smaller amount of current will pass through.

I hope this helps

Answer:

300,000=3×10^3

.000012=1.2×10^-6

Explanation:

a).  The gravitational forces between the Earth and the Sun bends the Earth's motion along a curving path instead of a straight line.

b).  The gravitational forces between the Earth and a falling rock make the rock fall faster and faster.

c).  The force of a pressurized stream of hot air makes a balloon get rounder and bigger.

d).  The gravitational forces between the Earth and a rock tossed straight up make the rock go slower and slower, and eventually stop.  (In the next instant,  it starts falling, as described in answer-b.))

e).  The acoustic and emotional force of your mother's voice 15 minutes before the school-bus arrives causes you to turn over, sit up, and start putting on your socks.

Explanation:

1.The parts of the ear include:

External or outer ear, consisting of: Pinna or auricle. This is the outside part of the ear. ...

2.Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.

3.Middle ear (tympanic cavity) , consisting of: Ossicles. ...

4.Inner ear , consisting of: Cochlea.

Explanation:

The major parts of ear are:-

1) Outer ear

2) Middle ear

3) Inner ear

Answer:

b and c are the answers

A is an opinion, D is a superstitious belief because they haven’t found Jesus obviously

Explanation:

the answer is in the image above

Answer:

a)20 m,2s

Explanation:

Given

Initial velocity=20 m /sec

g=10 m/s square

v =0m/s

h =?

t =?

now,

v = U +gt

=v=20 +10t

Or,10t=20

Or,t=20

10

therfore ,2 s.

Again,

h=ut -1 gt square

2

Or, h=20×2-1×10(2)square (multiply and cut )2×5 =10

; 2

Or,40-5×4

therefore , 20m

six cm - centimeters

Answer:

The last option

Explanation:

Answer:

Rice, wheat, maize all have one cotyledon in their seed, so they are monocots. Explanation: The monocot plants have a single cotyledon. They have a fibrous root system, leaves in monocots have parallel venation.

Explanation:

Answer:

d) Kilogram.

Mass is measured in

a) Litters

b) Centimeter

c) Newton

d) Kilogram

Answer:

If we assume that the box is a cube with 150 m² surface area

Area of 1 face = 150 m² / 6 = 25 m²

The box will exert a downward force of

Force = mass * acceleration due to gravity

Force = 300 kg * 9.81 m/s² N

Force = 2943 N

The box exerts a pressure ( force / unit area) = 2943 N / 25 m²

Pressure = 117.7 N/m²

Thank you, if you found this helpful please comment.

Answer:

a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving.

Answer:

A centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.

Answer:

it means that the body is moving with acceleration increased of 10m in every second.

Answer:

36 mph.

Explanation:

Now Albert here is using the wind to his advantage but if say there was no wind then he would not have the 6 mph behind him so we subtract 6 from 40 to get 36. hope this helps :)

Answer:

c

Explanation:

A shift inward of the production possibilities curve signifies that: C. The available production resources have decreased, so potential production levels will decrease.

A production possibilities curve (PPC) is also referred to as production possibilities frontier (PPF) and it can be defined as a curve that illustrates the maximum (best) combinations of two (2) products which can be produce in an economy if they both depend on these two (2) main factors;

Basically, the production possibilities curve (PPC) illustrates the maximum combinations of goods that are available with fixed technology and resources.

Furthermore, an inward shift of the production possibilities curve (PPC) signifies that the available resources used for production have decreased, so potential production levels would also decrease.

Read more: https://brainly.com/question/17053992

Answer:

Explanation:

Tides occur in the ocean but nit in lakes because an ocean is a free flowing body of water that can travel a large area of the globe while a lake or pond only covers a small area of the earth so it is not affected by gravity as violently and in turn, prevents the formation of tides.

Answer:

Yes

Explanation:

Any planet with a sufficiently dense atmosphere that lies in the path of the solar wind will have aurora. It has been discoveres in planets like Jupiter, Saturn, etc.

Answer:

yes

Explanation:

We know

[tex]\boxed{\sf F=G\dfrac{Mm}{r^2}}[/tex]

[tex]\\ \sf\longmapsto G=\dfrac{Fr^2}{Mm}[/tex]

[tex]\\ \sf\longmapsto G=\dfrac{3.82\times 10^{18}(2.5\times 10^7)^2}{(5.98\times 10^{24})^2}[/tex](M=m)

[tex]\\ \sf\longmapsto G=\dfrac{3.82\times 10^{18}(6.25\times 10^{14})}{35.7\times 10^{48}}[/tex]

[tex]\\ \sf\longmapsto G=\dfrac{23.87\times 10^{32}}{35.7\times 10^{48}}[/tex]

[tex]\\ \sf\longmapsto G=0.668\times10^{-16}[/tex]

[tex]\\ \sf\longmapsto G=6.68\times 10^{-15}[/tex]

Answer:

please mark me brainliest

Explanation:

No, sound waves cannot travel in a vacuum. This is because sound waves are mechanical waves that need a medium (such as air and water) to travel. Sound in physics is defined as a vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid.

any two uses of good conductor of heat are

aluminium, cooper, metal are good conductor of heat and they are used for making utensils.

gold, silver, are also good conductor of heat they are used for making jewelleries.

Explanation:

when the object is between the pole and focus

Answer:

Mass of the ball, M = 6.667 kg

Explanation:

Given data:

Momentum, Mo = 10.0 kgm/s

Velocity of the rolling ball, V = 1.5 m/s

Mass of the body, M = ?

Momentum, Mo = Mass, M x Velocity, V

10.0 kgm/s = M x 1.5 m/s

Divide each side by 1.5 m/s

M = 10.0 kgm/s / 1.5 m/s

M = (6⅔) kg

:. Mass of the ball, M = 6.667 kg

Answer:

hmmm i dont know....

Explanation:

i just wanted free point. TANKS YOU SIR!!

We have that

The wombats total displacement is

[tex]d_t=2100m[/tex]

The average velocity during that time is

[tex]v_{avg}=5m/s[/tex]

From the question we are told that:

initial Velocity [tex]V_1=5m/s[/tex]

initial Time [tex]T_1=4min=>240sec[/tex]

Final Velocity [tex]V_2=4m/s[/tex]

Final time  [tex]T_2=3min=>180sec[/tex]

a)

Generally, the equation for displacement is mathematically given by

d_t=(Initial +final) displacement

Where

initial displacement

[tex]d_1=V_1*t_1\\\\d_1=5*240[/tex]

[tex]d_1=1200m[/tex]

Final displacement

[tex]d_2=V_2*t_2\\\\d_2=5*180[/tex]

[tex]d_2=900m[/tex]

Therefore

[tex]d_t=(Initial +final) displacement[/tex]

[tex]d_t=1200+900[/tex]

[tex]d_t=2100m[/tex]

b)

Generally, the equation for Average velocity is mathematically given by

[tex]v_{avg}=\frac{d_t}{t_1+t_2}[/tex]

[tex]v_{avg}=\frac{2100m}{240+180}[/tex]

[tex]v_{avg}=5m/s[/tex]

in conclusion

The wombats total displacement is

[tex]d_t=2100m[/tex]

The average velocity during that time is

[tex]v_{avg}=5m/s[/tex]

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Using 3rd equation of kinematics

[tex]\\ \rm\longmapsto v^2-u^2=2as[/tex]

[tex]\\ \rm\longmapsto s=\dfrac{v^2-u^2}{2a}[/tex]

[tex]\\ \rm\longmapsto s=\dfrac{30^2-15^2}{2(5)}[/tex]

[tex]\\ \rm\longmapsto s=\dfrac{900-225}{10}[/tex]

[tex]\\ \rm\longmapsto s=\dfrac{675}{10}[/tex]

[tex]\\ \rm\longmapsto s=67.5m[/tex]