Answer:
the electric field is 3.91 x 10⁶ N/C
Explanation:
Given the data in the question;
Electric field at a point due to point charge is;
E = kq/r²
where k is the constant, r is the distance from centre of terminal to point where electric field is, q is the excess charge placed on the centre of terminal of Van de Graff,a generator
Now, given that r = 3.9 m, k = 9.0 x 10⁹ Nm²/C², q = 6.60 mC = 6.60 x 10⁻³ C
so we substitute into the formula
E = [(9.0 x 10⁹ Nm²/C²)( 6.60 x 10⁻³ C)] / ( 3.9 )²
E = 59400000 / 15.21
E = 3.91 x 10⁶ N/C
Therefore, the electric field is 3.91 x 10⁶ N/C
Answer:
True
Explanation:
defines defensive driving skills can be seen as driving with a conscious mindset, in order save lives, time, and money, in spite of the conditions around you and the actions of others.
It entails taking proactive measures such avoiding oncoming speeding vehicles, making sure you can see the rear tires of the vehicle in front of you in a traffic jam, always obeying traffic rules. This is done to protect the lives and property of both yourself and the people around you, regardless of he conditions that you are faced with while driving.
<h2>Answer</h2>
Gravitational potential energy of the textbook-Earth system relative to the desk = 98 N/m
<h2>Explanation</h2>
Given that,
Mass of history book = 8kg
height of book from ground = 1.25m
acceleration due to gravity = 9.8m/s²
<h3>gravitational potential energy formula</h3><h2>GPE = Fg⋅h</h2><h2>GPE = mgh</h2>
where ,
m = mass of object(book)
g = acceleration due to gravity
h = the altitude of the object.
GPE = 8(9.8)(1.25)
= 98 N/m
So, gravitational potential energy of the textbook-Earth system relative to the desk = 98 N/m
Answer:
7.9m/s
Explanation:
we need to convert the given values to metres and seconds
3/2km = 1500m and 3.5min = 210s
Using the first key equation of accelerated motion:
d = ((vi+vf)/2) x t
1500m = ((6.4+vf)/2) x 210 (plug in values)
3000m = (6.4 + vf) x 210 (get rid of the denominator by multiplying both sides by 2)
14.29 = 6.4 + vf (divide both sides to get rid of time)
vf = 7.885 m/s (subtract 6.4 from the right side to isolate vf)
2 significant digit answer is 7.9m/s
