A car travels a distance of 1600km in 24hr .what was it's speed​

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.