A very long aluminum wire has a radius of 1 cm and a uniform charge density σ = 6 x 10^-5 C/m² over its area. 1. What is the charge on 1 m of this wire?

2. What is the linear charge density of the wire?

3. What is the electric field at a point 7.8 cm away from the surface of the wire?

Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.