Answer:
If a Gaussian surface is completely inside an electrostatic conductor, the electric field must always be zero at all points on that surface.
Explanation:
Option A is incorrect because, given this case, it is easier to calculate the field.
Option B is incorrect because, in a situation where the surface is placed inside a uniform field, option B is violated
Option C is also incorrect because it is possible to be a field from outside charges, but there will be an absence of net flux through the surface from these.
Hence, option D is the correct answer. "If a Gaussian surface is completely inside an electrostatic conductor, the electric field must always be zero at all points on that surface."
The kinetic energy of any moving object is
K.E. = (1/2) (mass) (speed)² .
To use this simple formula, the 'mass' has to be in kilograms,
and the 'speed' has to be in meters-per-second.
You can see that we have a slight problem that has to be cleaned up:
The speed in the question is given in "kilometers per hour", but we'll
need it in "meters per second". So let's convert that right now:
(600 km/hour) x (1 hour / 3600 seconds) x (1000 meters / km)
= (600 x 1 x 1000 / 3600) (km-hour-meters / hour-second-km)
= 166.67 meters/second .
Now we're ready to plug numbers into the formula for K.E.
(1/2) (mass) (speed)²
= (1/2) (80,000 kg) (166.67 m/s)²
= (40,000 kg) (27,777.8 m²/s²)
= 1,111,111,111 kg-m²/s²
= 1.1... x 10⁹ Joules (choice D)
Answer:how long it took you to get there and the distance between your house and her house
Explanation:
The bullet will strike the target placed in 324.0 m in the East in 0.45 seconds.
<u>Explanation:</u>
As we all know the epic relation between distance, speed and time; we cam easily estimate the time in which an object can reach to the destination or target.
As here in this case, we know the distance of the target and the velocity of a bullet exerted from a rifle given as follows,
Distance of the Target from the rifle edge = 324.0 m
Velocity of bullet exerted from the rifle = 720 m/s
Since we know that,
or
We can simply implement all the values in the formula and get the results i.e the time required by the bullet to hit the target. Since both the values are in S.I units measures, we don't need to change or convert any of them. Hence,
Therefore, the bullet will hit the target in 0.45 seconds.
For the first question you could devise a way to test the question to find the answer. You could create a sample of black cats, a sample of white cats, and a control sample of a both black and white cats.
<span>You would measure how much the cats eat each day. The study could be repeated or reviewed by your peers. </span>
<span>For the second question, there is currently no way to sample a person's thoughts, but even if there was a way, there would be no way to repeat the moment. It is not testable and not repeatable and thus cannot use the scientific method. </span>
<span>Calories can be measured and compared. </span>
<span>The tide can be observed until someone hypothesizes the right testable notion to determine the answer.</span>
