The distance between Earth and Sun is about 0.0000038 times
the distance to the next nearest star.
(The next nearest star is about 265,300 times as far from us as
the sun is.)
The distance between Earth and Sun is about 0.000000000000000000068
times the distance to the next nearest galaxy.
(The next nearest galaxy is about 14,700,000,000,000,000,000 times
as far from us as the sun is.)
A calorimeter measures the amount of heat in a chemical reaction. So the answer would be C, specific heat.
Answer:
Explanation:
the electric field between the plates is uniform and given by
E⃗ =(120N/C) j
So electric field is along y - axis
Force on electron
F_y = 1.6 x 10⁻¹⁹ x 120
a_y ( acceleration )= ( 1.6 x 10⁻¹⁹ / 9.1 x 10⁻³¹ ) x 120
a_y = 21.1 x 10¹²
a = 21.1 x 10¹² j
time to reach x = 2 cm = 2 x 10⁻² m
t = 2 x 10⁻² / 2.5 x 10⁵
= .8 x 10⁻⁷
= 8 x 10⁻⁸ s
velocity along y axis after time 8 x 10⁻⁸ s
= u + at
= 5 x 10³ + 21.1 x 10¹² x 8 x 10⁻⁸
= 5 x 10³+ 168.8 x 10⁴
= .05 x 10⁵ + 16.88 x 10⁵
= 16.93 x 10⁵
resultant velocity
= √( 2.5 x 10⁵ )² + ( 16.93 x 10⁵)²
= 17.11 x 10⁵ m /s
<u>Answer:</u>
<em>Instantaneous velocity is equal to speed of the object at that particular instant.</em>
<u>Explanation:</u>
Instantaneous velocity is the velocity of the object at that particular instant. It is also equal to speed of the object at that instant. It can be calculated by drawing a tangent to the position-time graph at that point and finding the tangent’s slope.
The first option ‘The ratio of change in position to the time interval during that change’ gives the average velocity of an object and not speed. Similarly the second option ‘the absolute value of the slope of position time graph’ gives the average speed.
there are three ways by which we can transfer heat from one place to other
1. Conduction
In this method of heat transfer heat can be transferred from one place to other without actual movement of medium molecules. This is possible in solid conducting mediums
2. Convection
Here heat energy is carried away along with the medium molecules where medium molecules can move from one place to other while heat is transferred. It is possible in liquid and gas but not possible in solids
3. Radiation
In this mode of heat transfer we do not require any medium and here heat transferred by electromagnetic waves
So we can feel heat from sun in form of electromagnetic waves and it is the fastest way to transfer the heat also it do not require any medium