Answer:
0 m/s²
Explanation:
Draw a free body diagram (see attached).
Sum of the forces normal to the incline:
∑F = ma
N − mg cos θ = 0
N = mg cos θ
Sum of the forces parallel to the incline:
∑F = ma
mg sin θ − f = ma
mg sin θ − Nμ = ma
Substituting:
mg sin θ − (mg cos θ) μ = ma
g sin θ − g μ cos θ = a
a = g (sin θ − μ cos θ)
Given that g = 9.8 m/s², θ = 30°, and μ = 1/√3:
a = (9.8 m/s²) (sin 30° − 1/√3 cos 30°)
a = (9.8 m/s²) (1/2 − 1/2)
a = 0 m/s²
The acceleration down the incline is 0 m/s².
Answer:
1) B
2) A, B, and D
Explanation:
1) The atomic number provides the number of protons and electrons, since the number of the two are the same.
2) You DO NOT know whether or not the protons are in the nucleus (they are) based on the atomic number, that's just prior knowledge.
Answer: B
absorbed all the colors except violet from the white light
Explanation:
Light frequency that corresponds to a particular color, it absorbs all the other frequencies in the visible light spectrum. For instance, An orange absorbs all of the frequencies but orange. And a banana absorbs all of the frequencies except for yellow.
This is an example of classical conditioning, and the library is a conditioned stimulus.
The idea of classical conditioning was first put forward by the man Ivan Pavlov, a Russian physiologist.
In his studies, he was able to successfully associate a once neutral stimulus to a conditioned response. The neutral stimulus hitherto does not produce the expected response until after conditioning has taken place.
In this case, the library was a neutral stimulus. When it becomes associated with a bakery, it provokes the conditioned response of hunger any time you go to the library.
The library is now a conditioned stimulus.
Learn more: brainly.com/question/18080270
I believe that L is in feet while t is in seconds. To
find for the hang time, all we have to do is to plug in the value of L in feet
in the equation.
4 inches is equivalent to 4/12 feet or 0.33 feet,
therefore the total L is:
L = 4.33 ft
Using the equation to find for t:
L = 4 t^2
4.33 = 4 t^2
<span>t = 1.04 s</span>