Inside a radiation therapy device, an electron is in the presence of a uniform electric field with a magnitude of 280 N/C. (a)
What is the magnitude of the acceleration of the electron (in m/s2)?
m/s2
(b)
The electron is initially at rest. What is its speed (in m/s) after 1.05 ✕ 10−8 s?
m/s

Iknow the first part it is the average star i am not 100% sure

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.