Perform the following operations :
`1.05 xx 10^-4 -9.7 xx 10^-5`

Perform the following operations : 4.11 xx 10^-3 + 8.1 xx 10^-4

Perform the following operations : 2.112 xx 10^6 - 3.5 xx 10^5

Perform the following operations : 3.97 xx 10^7 + 1.98 xx 10^4

Perform the following operations : 3.971 xx 10^7+ 1.98 xx 10^4

Perform the following operations : 4.11 xx 10^(-3)+ 8.1 xx 10^(-4),

Write each of the following in exponential notation : 0.00477 xx 10^5

Write each of the following in ordinary decimal form : 5.16 xx 10^-4

Find the order of magnitude of the following quantities: Mass of electron= 9.1 xx 10^31 kg

In a chamber , a uniform magnetic field of 6.5 G (1 G = 10^-4 T) is maintained. An electron is shot into the field with a speed of 4.8 xx 10^6 ms^-1 normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit, (e=1.6 xx 10^-19 C,m-e=9.1 xx 10^-31 kg)

Perform each of the following calculations . Round off your answers to two digits. frac (33) (9.00 xx 10^(-4))