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The ultimate source of energy is sun.The theory of relativity was given by Albert Einstein.Mitochondria is the powerhouse of the cell.

given : r=0.75m , g=9.8m/s2

To find : vH, wH(angular speed)

Formula : vH2=rg wH=vH/r

Calculation: vH2=o.75 * 9.8

=2.711m/s

wH=2.711/0.75

=3.615r ad/s

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Answer:B)Explanation

Answer:B)Explanation

विद्युत फ्लक्स का मात्रक है

The moisture present in aggregate forms a film around each particle. These films of moisture exert a force, known assurface tension,on each particle. Due to this surface tension each particles gets away from each other. Because of this no direct contact is possible among individual particles and this causes bulking of the volume.

Bulking of aggregate is dependent upon two factors,

Percentage of moisture contentParticle size of fine aggregate

Bulking increases with increase in moisture content upto a certain limit and beyond that the further increase in moisture content results in decrease in volume. When the fine aggregate is completely saturated it does not show any bulking. Fine sand bulks more as compared to coarse sand, i.e. percentage of bulking in indirectly proportional to the size of particle.

Sound Absorption Materials

Acoustic Fiberglass.

Acoustic Foam.

Acoustic Partitions.

is the answer equal to 4u^2/5

yes but how

i dont know i just used trigonometric tables for this question

girik satty can u do it without using trigonometric tables?

Option (4) is correct.

r=4h ((relation b/ w max. range and max. height))

so, max. h = 100 (a)

0.5K

Given P+Q+R= 0. , |P| = 3, |Q| = 4 and |R| = 5let the angle between Q and R is ∅

now Q+R = -P on squaring both side (Q+R)² = P²

=> |Q|² + |R|² + 2.|Q||R|cos∅ = |P|² => 4²+5²+ 2*4*5cos∅ = 3²=> 40cos∅ = 9-16-25 = -32so, cos∅ = -32/40 = -4/5

so, tan∅ = 3/4 , 37°

Echo is a repeated sound that is caused by the reflection of sound waves from a surface. The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface.

Distance between two men = 1.02 km = 1020 mSpeed of sound = 340 m/sTime taken by the sound to travel directly to second man t1 = 1020/340 = 3 sec

Now the echo is heard after 2sec after direct sound, so we have t2 = 5 sec

Hence, distance between man and hillock is2d2/v = t2d2 = t2*v/2 = 5*340/2 = 850 m

A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis. Fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.

Examples of fossil fuels:1.Coal: It is the primary fuel for the production of electricity and is responsible for about 40% of the electric power supply in the United States.2.Oil: Oil is the primary source for the world's transportation. 3.Natural Gas: About 27% of U.S. energy is fueled by natural gas.

3422 hota hBut acc to option d

Of all metals in pure form, tungsten has the highest melting point (3422 °C, 6192 °F), lowest vapor pressure (at temperatures above 1650 °C, 3000 °F), and the highest tensile strength.

3422°C≈3655K

3422°C≈3655K

option D

रासायनिक तत्वों की आवर्त सारणी रासायनिक तत्व (या केवल तत्व) ऐसे उन शुद्ध पदार्थों को कहते हैं जो केवल एक ही तरह के परमाणुओं से बने होते हैं। या जो ऐसे परमाणुओं से बने होते हैं जिनके नाभिक में समान संख्या में प्रोटॉन होते हैं। सभी रासायनिक पदार्थ तत्वों से ही मिलकर बने होते हैं। हाइड्रोजन, नाइट्रोजन, आक्सीजन, तथा सिलिकॉन आदि कुछ तत्व हैं। सन २००७ तक कुल ११७ तत्व खोजे या पाये जा चुके हैं जिसमें से ९४ तत्व धरती पर प्राकृतिक रूप से विद्यमान हैं। कृत्रिम नाभिकीय अभिक्रियाओं के परिणामस्वरूप उच्च परमाणु क्रमांक वाले तत्व समय-समय पर खोजे जाते रहे हैं। .

c) is the correct answer

D) the correct answer

c) is correct answer

the total mass of the particle = 4m

initial velocity= u

angle with horizontal=

vertical component of velocity=usin()

horizontal component of velocity=ucos()

let velocity at the highest point= v

and the velocity of fragment of mass 2m =w

at the highest point,there is no vertical velocity

i.e v= horizontal component of velocity=ucos() (constant, as there is no external accelation in horizontal)

at the highest poit of trajectory, net force in horizontal direction is zero hence momentum in horizontal direction is conserved i.e P(just before explosion)=P(just after explosion)

=> 4m*ucos()=m*0+m*(-ucos())+2m*w

=>5ucos()=2w

=> w=(5/2)ucos(

It is given in question that resultant vector R is unit vector along y-axis. So, R = 0i + j + 0k.

A + B + X = RX = R -( A + B)= 0i + j + 0k -( 3i -5j + 7k + 2i +4j-3k)= 0i + j + 0k -5i +j -4k= -5i +2j -4k (Ans)

The Center of mass will continue to move in the same path as A would hava followed. No other external force had acted upon it to change this motion.

Let v be the speed of mass m and let w be the speed of mass 4m.

Linear momentum of m is mv.

Linear momentum of 4m is 4mw.

From the problem, mv/4mw = 2/1 or v/4w = 2 or v/w = 8.

The ratio of the kinetic energies is (1/2)mv^2/(1/2) 4m w^2 = (1/4) (v^2/w^2) = 8^2/4 = 16

M1 = m2 = 1.50 kgv1 = 2.50 m/secv2 = - 2.50 m/sec

m1 v1 + m2 v2 = (m1 + m2) v1.50 * 2.50 - 1.50 * 2.50 = 0 => v = 0

So the combined momentum is zero. so v = 0.

B will go higher than A

are you sure that your answer is correct because gave answer in solution is option (a)

In collisions between two isolated objects Newton's third law implies that momentum is always conserved. In collisions, it is assumed that the colliding objects interact for such a short time, that the impulse due to external forces is negligible. Thus the total momentum of the system just before the collision is the same as the total momentum just after the collision. Collisions in which the kinetic energy is also conserved, i.e. in which the kinetic energy just after the collision equals the kinetic energy just before the collision, are calledelastic collision. In these collisions no ordered energy is converted into thermal energy. Collisions in which the kinetic energy is not conserved, i.e. in which some ordered energy is converted into internal energy, are calledinelastic collisions. If the two objects stick together after the collision and move with a common velocityvf, then the collision is said to beperfectly inelastic.

The are at the same temperature as your body (Thermal equilibrium).

wrong answer

i have taken g to be 9.8 take g as 10 you will get the answer

yes

gravitational force is directly proportional to product of massesand inversely proportional to square of distancehencemasses are doubled so 2*2 4 timesand distance doubled so divided by 2^2=1/4th timeshence 4*F/4=F

it will remain the same

Speed=320km/hDivide the speed by 3.6320km/h/ 3.6=88.88m/s

The answer will be 5N

Yes by Newton's law of conservation of forces as two blocks are in contact with each other all the Force experienced by 6kg block will be experienced by 4kg block hence 5 N is correct option.

is the answer equal to 0.5 plz inform me whether i m right or not

yeah right

but how

wait i an sending sol