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This MOTION is UNIFORM CIRCULAR motion.

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=> Typewriter was invented by (B) Sholes.

The FIRST typewriter was invented by the four Americans VIZ.,

1. CHRISTOPHER Latham Sholes

2. Samuel Willard Soulé

3. Carlos Glidden

4. Frank Haven HALL.

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Thank you ☺️☺️☺️

HELLO!!

Your ANSWER is C!

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~Krissy

The DARK PART of SHADOW DISAPPEAR at that HEIGHT.

A) KELVIN is the RIGHT one

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Because it has no POWERS

ANSWER:

The strength and direction of the COULOMB force F on a test charge qt depends on the electric FIELD E that it finds itself in, such that F = qtE. If the field is generated by a positive source point charge q, the direction of the electric field points along LINES directed radially outwards from it,

Explanation:

A MASS of ICE is 0.9340 g/ml.

For most SUBSTANCES , the freezing point rises , though only very SLIGHTLY with increased PRESSURE.Water is one of the very RARE substances that expand upon freezing.Consequently , its melting temperature falls very slightly if pressure is increased.

Besides GAIN being reduced, INPUT impedance raises as well as output impedance.
Common emitter transistor amplifiers are basically transresistive, that is they have low input impedance and high output impedance. By eliminating the emitter bypass the amplifier becomes more transconductive. And that is not completely bad because having some RESISTANCE on the emitter makes the amplifier gain more predictable and stable and less dependent on transistor, temperature, ageing, supply VOLTAGES. Also you get more bandwidth.

Besides, electrolytic capacitors are one of the less reliable electronic parts. They may leak, and all dry out; the hotter the fastest. Plus they are not linear. Good designs try to avoid electrolytic capacitors like the PLAGUE.

A NEUTRAL body also contains CHARGES.

when it is placed in electric field,

the negative CHARGE will gather opposite to the direction of field
and positive charges gather in the direction of electric field.

y=ax-bx^2

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2104 because when the century COME we have to DECIDE by 400 not by 4 so 2100 is not DIVIDED by 400 thats why it is not a leap year

If urban DOUBT is clear then comment

D)30M
is the ANSWER
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Charge always FLOW from high potential to low potential. If both sphere's potential SHAME there will be no flow of charge

Sphere of radius 2cm
V = Kq/r = (9 x 10^9 x 10 x 10^-6)/0.02
V = 4.5 x 10^6 v


Sphere of radius 4cm
Q = Vr/k
Q = (4.5 x 10^6 x 0.04)/9 x 10^9
Q = 2 x 10^-5

In CASE of SHUNT MOTORS

using diffrentiation method

x = 18t + 5t^2

dx / dt = 18 + 10t

v = 18 + 10t 

t = 2 sec

v = 18 + 10 * 2 

= 18 + 20 

= 38 m / sec

t = 3 sec

v = 18 + 10 * 3

= 18 + 20

= 48 m / s

v(av) = 38 + 48/ 2 

= 43 m/swc

dv / dt = 10

a = 10 m/ s

Read more on Brainly.in - brainly.in/question/537063#readmore

The EQN GIVEN was PROVED by THEORY of RELATIVITY E=mc^2

HENCE the ANSWER will be 1/2a^2t and a√s/2

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The VALUE of CURRENT will be same in all the three resistors all they are CONNECTED in series so 1A will FLOW through each of them.

Since we are given the angle the plane makes with the horizontal, we can get the horizontal and vertical COMPONENTS using trigonometric RATIOS.

The 200 N is the HYPOTENUSE magnitude.

SIN 60° = Vertical / 200N

Vertical = 200 × Sin 60

200 × 0.8660 = 173.2 N

Horizontal = 200 × Cos 60°

200 × 0.5 = 100 N

This is the widely accepted theory on how the sun was formed.

From other stars, astronomers found that the sun most likely started out as a large collapsing cloud of gas inside some INTERSTELLAR clout.

The cloud collapsed for millions of years, until it formed a rotating disk with a large central bulge. You know, something like this:

Pretty neat huh? And inside the rotating disk, bits of matter will EVENTUALLY collide and begin to form our planets. And one of those planets will be Earth!

The central bulge repeatedly collapsing under its own gravity until the TEMPERATURES in the core got so high that deuterium atoms (an isotope of hydrogen) began to fuse and give off thermonuclear energy. This CAUSED the continuous collapse to slow down and eventually led the sun to its second stage; where Hydrogen nuclei begin to fuse into Helium. This is what started the sun’s CURRENT evolutionary phase.

There are THREE LAWS of REFLECTION of LIGHT

Let the magnitude of the Vector P be a.

∴ In Vector Form,

Vector P = a

Let the magnitude of Vector R be r.

∴ r = 2a

In Vector Form,

= 2a

Now, We know,

= +

⇒ |R²| = |P|² + |Q|² + 2 |PQ| Cosθ

Cos θ = 90° [Angle between the x-y axis is 90°]

⇒ |R²| = |P|² + |Q|² + 2 |PQ|

∴ (2a)² = (a)² + (8)² + 2(a)(8)

⇒ 4a² = a² + 64 + 16a

⇒ 3a² - 16a - 64 = 0

∴ 3a² - 24A + 8A - 64 = 0

⇒ 3a(a - 8) + 8(a - 8) = 0

∴ (a - 8)(3a + 8) = 0

⇒ a = 8 and a = -8/3

a ≠ -8/3.

Hence, the Magnitude of the Vector P is 8.

Hope it helps.

We know that,

t =  [2H/g]½

T1 =  (2H/g)½

according to QUESTION 

t2 = (H/g)½ 

now MULTIPLY and DEVIDE by 2½ to t2

we get t2 = t1/(2)½

For BALMER n=2
for ground STATE n=1
so no electron will COME in ground state
no. of SPECTRAL line=0

Newton's Law of Cooling

Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature (i.e. the temperature of its surroundings).

Newton's Law makes a statement about an instantaneous rate of change of the temperature. We will see that when we translate this verbal statement into a differential equation, we arrive at a differential equation. The solution to this equation will then be a function that tracks the complete record of the temperature over time. Newton's Law would enable us to solve the following problem.


Example 1: The Big Pot of Soup As part of his summer job at a resturant, Jim learned to cook up a big pot of soup late at night, just before closing time, so that there would be plenty of soup to feed customers the next day. He also found out that, while refrigeration was essential to preserve the soup overnight, the soup was too hot to be put directly into the fridge when it was ready. (The soup had just boiled at 100 degrees C, and the fridge was not powerful enough to accomodate a big pot of soup if it was any warmer than 20 degrees C). Jim discovered that by cooling the pot in a sink full of cold water, (kept running, so that its temperature was roughly constant at 5 degrees C) and stirring occasionally, he could bring tht temperature of the soup to 60 degrees C in ten minutes. How long before closing time should the soup be ready so that Jim could put it in the fridge and leave on time ? 


Solution: Let us summarize the information briefly and define notation for this problem.
 Let = Temperature of the soup at time t (in min). = Initial Temperature of the soup =100 deg. = Ambient temperature (temp of water in sink) = 5 deg .

Given: The rate of change of the temperature  , is (by Newton's Law of Cooling) proportional to the difference between the temperature of the soup  and the ambient temperature  This means that:



Here a bit of care is needed: Clearly if the soup is hotter than the water in the sink , then the soup is cooling down which means that the derivative  should benegative. (Remember the connection between a decreasing function and the sign of the derivative ?). This means that the equation we need has to have the following sign pattern:



where  is a positive constant. 
 This equation is another example of a differential equation. The independent variable is  for time, the function we want to find is  , and the quantities  are constants. In fact, from Jim's measurements, we know that  , but we still don't know what value to put in for the constant  . We will discuss this further below.

 For your consideration:

(1) Check that the differential equation above makes sense. Can it also describe the case of a cold object heating up in a warmer environment?

(2) What do you think the constant represents ?

(3) What units would this constant have ?

(4) If you were to compare the rate of cooling of the soup inside a sealed styrofoam container, and inside a metal pot, which one might correspond to a LARGER value of k?


Back to the same old equation 

The equation we arrived at above looks different from the ones we have just investigated, but as we shall soon see, the difference is rather superficial. INDEED, by defining a new variable, we will SHOW that the equation is REALLY completely related to the exponential decay seen previously. To see this, define 
 = Temperature difference between soup and water in sink at time t. = Initial temperature difference at time t=0

Note that if we take a derivative of  , and use the Newton's law of cooling, we arrive at



(We have used the fact that  is constant to eliminate its derivative, and we plugged in for  in the last step.) What a nice surprize ! By defining this new variable, we have arrived once more at the familiar equation



whose solution is well known to us, namely:



We can use this result to conclude (by plugging in ) that

It follows that

PHOTONS I GUESS. As it RADIATES LIGHT and HEAT.

Density is itself the NATURE of a material . Like I would quote , we say something is SWEETER than sugar . Why do we say so , is because we compare it with the sweetness of sugar . Actually it is sweet as much as it is but we compare it to sugar to give a sense of sweetness it carries . Similarly , pure WATER's density is taken as a parameter to compare DENSITIES , I.e. the density of water is taken as 1 gm /cm ^3
We actually don't know actual density . It's just taken as a reference . Physics itself is a reference . Nothing is certain . That's why we call it RELATIVE density . It is the density of a substance as compared to the water.

Well ... You must be knowing that the velocity of a BODY at the top of TRAJECTORY remains only the horizontal component of velocity with which it was fired with. Suppose a body is fired at angle x with horizontal . So it's velocity at top of trajectory will be EQUAL to ( v cos x )
We know the general formula of kinetic energy I.e . 1/2 mv^2
So kinetic energy at top will be 1/2m (v cos x )^2 that is equal to 1/2mv^2cos^2x .
I hope it helped.

MINIMUM ERROR will be there when the PRODUCT of tan x and π will be minimum .
TAKE the value of π =3.14.
Now product of tan x and π should be minimum . For that , check the value of tan x to minimise this product.
We know that tan 0° = 0 which will give results = 0 . It means 0 ERRORS. That's why value of the angle will be 0°
I hope it helped.

There is mass of bullet is 10 g
VELOCITY=330m/s...
calculate the velocity of GUN to recil the bullet....
MAKE this as BRAINLIST

This WAY THREE RESISTANCE can be JOINED