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=45thita 2 = 45hope it MAY HELP you

iend! ☺Here's your ANSWER : There are (a) 3 SIGNIFICANT figures in 3.14 because as per RULES of significant figures , each number should be considered a significant figure in a DECIMAL number except the FOLLOWING zeroes.________________________Thank you ! ♠Doubts are most welcome :)

pH is a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more ALKALINE. The pH is equal to −log10 c, where c is the HYDROGEN ION concentration in moles PER litre✔Explanation:MARK BRAINLIST❤

iend ! ☺Here's your ANSWER : For a physical formula to be CORRECT DIMENSIONAL HOMOGENEITY isc) both necessary and sufficient.________________________Thank you ! ♠Doubts are most welcome :)

what is the QUESTION???

(d) and (C) is the ANSWER.

What LANGUAGE is this, ASK in EnglishExplanation:

have MAGNITUDE, vectors have magnitude and direction. HEAT is an aggregate measure of the amount of energy STORED in a system of particles (a single particle doesn't have a TEMPERATURE), but it doesn't point in any particular direction

Magnesium ribbon is CLEANED to REMOVED the protective layer of magnesium oxide from the SURFACE of magnesium ribbon .So that it MAY readily combine with the OXYGEN of airExplanation:

the VALUE is rounded off to the nearest 10.Explanation:so 9.8 ×10^7 = 98 × 10^8 so its APPROXIMATELY 100 × 10 6so its equal to 1 .THANK YOU

is (b)Explanation:The accuracy is based on the age of the person... if the person is OLDER than the accuracy may REDUCED and vise VERSA......Nice to MEET you...GOODLUCK...

Man goes 50 m to North , then 40 m to East and 20 due South. We NEED to find out the displacement of the whole journey.First of all , we need to define Displacement :Displacement is the shortest length between the starting and stopping point. It's a vector having both directions and magnitude.Look.at the attached diagram to UNDERSTAND his trajectory from home to field.So the diagram SHOWS a Trapezium like figure which is formed in his journey . We need to find x.Thos can be done using Pythagoras theorem:So displacement is 50 m

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How do you calculate the arc-length AB and its MASS M? Example 3: A 120-cm guitar STRING is under a TENSION of 400N. The mass of the

The FOUR Fundamental FORCES of Nature are Gravitational FORCE, Weak NUCLEAR force, Electromagnetic force and Strong Nuclear force.Explanation:pls follow me and mark me BRAINLEST

grams/density700/16.442.6829is the ANSWER. PLEASE MAKE it BRAINLIEST ANSWER

Surface AREA of CUBE TOH % error,∆a/a=∆2a/aApply the FORMULA you will get it

tion:OTEC uses the principle of a heatengine. It WORKS by converting a temperature difference into ENERGY. This means the difference in temperature between the warmer water on the surface and the cooler water in the depths of the OCEAN can be converted into electricity.

When they will be at REST

2m I think so bro if correct then MARK me as BRAINLIEST

ctric field will be zero at a point where the forces EXERTED by CHARGES 4q and Q on a test charge q 0 are equal and opposite. Let this point be at a DISTANCE x from 4q, then its distance from q=30−x. If F 1 is force due to 4q and F 2 due to q, then F 1 =F 2 ,i.e., 4πϵ 0 1 x 2 4q×q 0 = 4πϵ 0 1 (30−x) 2 q×q 0 (or) x 2 4 = (30−x) 2 1 ⇒2(30−x)=x(or) x=20cm.

height = 21m ,let us ASSUME g as 10 m/s2and weight (FORCE) = 12 Nby the formula F=mgwe get, 12= m*10 or,m= 12/10or,m = 12/10 KG THEREFORE , by the formula of gravitational potential energy that is U = mghso ,U ( gravitational potential energy)= 12/10*10*21=252 joule is your answer..plz mark me as brainliest...

tion:Given-Radius of curvature, R = 80 cmRadius of curvature of a SPHERICAL mirror= > 2 x focal length(f)=> R = 2F=> f = R/2=> f = 80/2=> f = 40cm.Hence, the focal length of the given spherical mirror is 40cm.

The SECOND LAW of THERMODYNAMICS states that the entropy of any ISOLATED system ALWAYS increases

Co=K CK =Co/C=50/100=0.5

Eletriclal energyExplanation:

It is UNIT of CAPACITANCE in which it is MEASURED.

The linear magnification produced by a SPHERICAL MIRROR (concave or convex) is defined as the ratio of the HEIGHT of the image (H′) to the height of the object (h).EXPLANATION:

- DIMRNSIONAL ANALYSISSOLUTIONS Given, frequency is directly proportional to length , mass and TENSION. HENCE, frequency can be written as .........(I)Now, Dimension of L = [L]Dimension of M = [M]Dimension of T = Dimension of f = Now, for the above formula of frequency to be correct, the equation should also be dimensionally correct.There fore ,dimension of LHS = dimension of RHS=> {T}^{ - 1} = => {T}^{ - 1} = Comparing both sides, we get=> a + c = 0 B + c = 0 -2c = -1=> c = 1/2 and a = b = -1/2.putting these values in equation (I)f = K √T/√L√M

1 at 2 v=u+atAverage VELOCITY = Total TIME(t)Total DISPLACEMENT(s) = tut+ 21 at 2 =u+ 21 atSubstitute, u=v−at in the above expression:We get AVERAGE velocity =v−at+ 21 at=v− 21 atmark as brillienst answer

a=d2x/dt2 = 2b-6ct

,1 is the CORRECT OPTION and answerconcave MIRROR is USED

The image will form 20cm BEHIND the concave MIRROR..

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power=1/f=1/60=0.0167 D

Light travels faster Explanation:As SPEED of light is APPROX 3 LAKH km/s and Speed of sound is343 m/sSo here you can easily compare that which of the either travels fasterHOPE it helpsplease mark as brainliest

n Normal TEMPERATURE in March to October As PART of the arachnid family, scorpions are creatures that have been in existence for a long period of TIME. Due to their ability to adjust, the creatures thrive as WELL in sub-zero temperatures as they do in warm temperate regions. Scorpion SEASON often runs from as early as March all the way to October

ᎻᎬY ᎷᎪᎢᎬ ᏌᎡ ᎪNᏚᏔᎬᎡ ᏆᏚThe property DUE to which particles of a medium actually MOVE and carry heat ENERGY from one place to another is KNOWN as convection. ... This results in the generation of convectional currents taking the warmer MOLECULES up while sinking the colder molecules down..#Be Brainly