Answer:
decreases
Explanation:
The intensity of light is inversely proportional to the square of distance between the source and the observation point.
So, as the distance increases by the factor of 2, then intensity becomes one fourth.
As the distance becomes half, the intensity becomes four times,
Answer:
Hey
C Which LED screen design is the most energy-efficient?
In physics, we talk about energy, not the best price, or which one looks the best, or if it violates a patent
Answer:
1.69 * 10^(-7) C
Explanation:
We can find this by using the formula for electric potential while making charge the subject of formula:
V = kQ/r
=> Q = (V*r)/k
Where k = Coulumbs constant
V = electric potential
Q = charge
r = distance between doorknob and charged body
From the question,
V = 6 kV = 6000 V
r = (25 + 0.3) cm = 25.3 cm = 253m
Note: Since we assume that the body is a sphere and we know that the charge in a sphere is concentrated in it's center, we add the radius of the sphere to the length of the spark (which tells us the distance between the doorknob and body) to get the distance between the doorknob and the charge.
Hence:
Q = (6000 * 0.253)/(9 * 10^9)
Q = 1.69 * 10^(-7) C
Answer:
7.84 s
Explanation:
Ok, one step at a time. We know the mass of the projectile, we know the force. Acceleration is easily obtained from Newton second law:
.
At this point, we know the acceleration, we know initial and final velocity, we can time the ammount of time it took to get there.
The S strain Pneumococcus bacteria had a smooth surface because IT IS SURROUNDED BY A CARBOHYDRATE CAPSULE CALLED THE S STRAIN. The other form, the R strain has a rough surface and no capsule. It is only the S strain that exhibits virulence.