Answer:
C. contains negatively charged particles
Explanation:
- J.J Thomson placed two opposite charged electric plates around a cathode ray tube which is a sealed glass tube with high vacuum
- He found that a beam of negatively charged particles are generated in the tube which got attracted to the positively charged plate.
- These subatomic particles are called electrons and they have negative charge.
Answer:
The direction of the contact forces acting on a body is not necessarily perpendicular to the contact surface. The resolution of contact forces in two components i.e. perpendicular to contact surface and along surface. Perpendicular component is normal force and parallel component is friction.
Explanation:
We have that for the Question "In the same year, the average finishing <em>time</em> for U.S. women was 4 <u>hours </u>and 41 <em>minutes</em>. What was the average female speed in miles per <em>hour</em>?" it can be said that
The average female speed in miles per hour
From the question we are told
In the same year, the <u>average</u> finishing <em>time</em> for U.S. women was 4 <u>hours </u>and 41 <em>minutes</em>. What was the average female speed in <u>miles</u> per <em>hour</em>?
<h3>Average speed </h3>
This is defined as the collective <u>mean</u> of different travel <em>intervals </em>
Generally the equation for Speed is mathematically given as
V=\frac{Distance}{Time}
Therefore
For 4 <u>hours </u>and 41 <em>minutes=4.683hours</em>
This travels time was <em>obtained </em>over a series of distance
<em>Hence</em>
<em>Distance D</em>
The average female <em>speed</em> in miles per hour
For more information on speed visit
brainly.com/question/7359669
<span>Electric field is proportional to q/d^2, where q is the magnitude of the charge and d is the distance. Since all the given units are identical, we can just compare their relative magnitudes without calculating for the exact values.
A) 3/(0.4)^2 = 18.75
B) 1.5/(0.2)^2 = 37.5
C) 6/(0.4)^2 = 37.5
D) 3/(0.2)^2 = 75
Therefore, choice D has the largest electric field of all.
</span>
Magma that cools and forms