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Physics Units and Measurement

Identify the vector quantity among the following

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alok kumar singh

Contributor-Level 10

Angular momentum is an axial vector along axis of rotation.

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Physics Class 12th

How is the body mass affected when charging?

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Syed Aquib Ur Rahman

Contributor-Level 10

You should know that electrons have a definite mass. The mass of a body increases a little when it gains electrons. The body mass can also slightly decrease if the body loses electrons during charging.

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Physics Class 11th

In the equation of angular displacement of a particle moving on a circular path is given as

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alok kumar singh

Contributor-Level 10

Please find the solution below:

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Physics Class 11th

A ball is projected from ground at angle q with the horizontal. After t = 1 s, it is moving at 45° with the horizontal and after t = 2 second, it is moving horizontally. What is speed of projection of ball? [g = 10 m s^–2]

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alok kumar singh

Contributor-Level 10

Please find the solution below:

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Physics Work, Energy and Power

A ball is projected vertically up with an initial velocity. Which of the following graph represent KE of ball?

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alok kumar singh

Contributor-Level 10

Please find the solution below:

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Physics Class 11th

Distance travelled by a particle starting form rest and moving with an acceleration of 4/3ms^-2 in the second is

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alok kumar singh

Contributor-Level 10

Please find the solution below:

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New answer posted

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Physics Class 11th

Identify the vector quantity among the following

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alok kumar singh

Contributor-Level 10

Angular momentum is an axial vector along axis of rotation.

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New answer posted

a month ago

Physics Class 11th

Can we call the trailing zeroes in numbers as significant numbers?

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Syed Aquib Ur Rahman

Contributor-Level 10

We cannot call the trailing zeroes as significant numbers. If you remember from the rules, it needs to have a decimal point somewhere to be considered as one. What is recommended is that one can use the measure as to the power of 10.

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Physics Work, Energy and Power

Potential energy function corresponding to conservative force is given as $U (x, y, z) = \frac{3 x^{2}}{2} + 5 y + 6 z$ , then the force at x = 6 is pN. The value of p upto its nearest integral value is

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alok kumar singh

Contributor-Level 10

$F_{x} = \frac{- d v}{d x}$

$\vec{F} = - 3 x \hat{i} - 5 \hat{j} - 6 \hat{k}$

${| \vec{F} |}_{x = 6} = \sqrt[]{1 8^{2} + 5^{2} + 6^{2}}$

$= \sqrt[]{324 + 25 + 36}$

= $\sqrt[]{385}$

= 19.62N

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Physics Units and Measurement

Voltage and resistance for a resistor are measured as V = 200 ± 5 volts and R = 20 ± 0.2 2. The percentage error in current isx. Find the value of 10x

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alok kumar singh

Contributor-Level 10

%error= $(\frac{d V}{V} + \frac{d R}{R}) * 100$

$= (\frac{5}{200} + \frac{0.2}{20}) * 100$

= 3.5

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