An object with a charge of -4.0 μc and a mass of 1.4×10−2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. part a find the magnitude of the electric field. express your answer using two significant figures.

34000N/C (to 2sf)

Explanation:

Using the relationship F = qE where F is the electric force experienced by the object

q is the charge on the object

E is the electric field.

If the body experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight W then F = W

The equation above can be rewritten as W = qE ... 2

From equation 2;

E = W/q

Since W = mass m × acceleration due to gravity g

E = mg/q

Given the data

Mass = 1.4×10^−2 kg

g = -9.81m/s²(since it experiences an upward force)

q = -4.0 μc = -4×10^-6C

E = (1.4×10^−2 × -9.81)/-4×10^-6

E = 3.43×10^(-2-(-6))

E = 3.43×10^(-2+6)

E = 3.43 × 10^4

E = 34300

E = 34000 N/C (to 2sf)

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.