The SI units of magnetic field is _____.

A physical quantity is represented by X = M^a L^b T^-c . If percentage error in the measurement of M, Land Tare \(\alpha \)%, \(\beta \)% and \(\gamma \)% respectively, then total percentage error is _____.

The velocity of a body moving in viscous medium is given by v =\(\frac { A }{ B } \left[ 1-{ e }^{ \frac { -t }{ b } } \right] \)where t is time, A and B are constants .Then the dimensions ot A are _____.

Is it possible to have length and velocity both as fundamental quantities? Why?

What is the difference between nm, mN and Nm?

What is meant by angular diameter of moon?

Find the relative error in Z if Z = \(\frac { { A }^{ 4 }{ B }^{ 1/3 } }{ { CD }^{ 3/2 } } \)

How many metric tons are there in teragram?

The angle subtended by the moon at a point on the earth is 0⁰31'. If the distance of the moon from the earthis 3.84 x 10⁸m. Find the diameter of the moon.

State the number of significant figures in the following :
(a) 0.007 m².
(b) 2.64 × 10²⁴ kg
(c) 0.2370 g/cm³
(d) 6.320 J
(e) 6.032 N/m².
(f) 0.0006032 m².

A SONAR (Sound Navigation And Ranging) uses ultrasonic waves to detect and locate objects under water. In submarine equipped with a SONAR the time delay between generation of a probe wave and the reception of its echo after reflection from an enemy submarine is found to be 77.0 s. What is the distance of the enemy submarine?
(Speed of sound in water = 1450 m/s)

Write down the number of significant figure in the following.
3.08 x 10¹¹

Using a screw gauge, the diameter of a metal rod was measured. The observation are given as follows: 0.39 mm, 0.37 mm, 0.41 mm, 0.38 mm, 0.38 mm, 0.37 mm, 0.40 mm, 0.39 mm. Calculate the percentage error in the measurement of the diameter.