Give me the answers to these questions please.
- A current f 0.70A flows thrugh a wire when a P.D of 0.35V is applied at the ends of the wire. If the wire is o.5M long and hasa cross sectional area of 8.0 x 10-3 m2, determine its resisitivity.
- the total weight of a car with passengers is 25000n. the area of contact of each of the four tyres with the ground is 0.025m2. Determine the minimum car tyre pressure.
- Draw a well labelled diagram of the X-Ray tube and describe the functioons of all the parts.