The particles emitted when \( {}^{39}_{19}\mathrm{K} \) decay to \( {}^{39}_{19}\mathrm{K} \) is

The diagram above shows a closed side 0.5m in a uniform electric field E in the direction shown by the arrows. What is the flux Φ for the box?

The diagram above is a block and tackle pulley system in which an effort of 80N is use to lift a load of 240N. The efficiency of the machine is

In the circuit diagram above , the ammeter reads a current of 3A when R is 5Ω and 6A when R is 2Ω. Determine the value of x

If a ray traveling in air is incident on a transparent medium as shown in the diagram, the refractive index of the medium is given as

Find the frequencies of the first three harmonics of a piano string of length 1.5m, if the velocity of the wave on the string is 120ms-1

In the diagram above, determine the r.m.s current

A bread toaster uses a current of 4A when plugged in a 24oV line. it takes 1 minute to toast slices of bread. what is the energy consumed by the toaster

What is the angle of dip at the magnetic equator