Answer:
The correct answer is a = The number of mutations in DNA is compared between two species.
Explanation:
Hello ! Let's solve this!
The molecular clock is a technique to see the divergence between two species. In other words, to see DNA mutations.
The correct answer is a = The number of mutations in DNA is compared between two species.
Given:
V1 = 4m3
T1 = 290k
P1 = 475 kpa = 475000 Pa
V2 = 6.5m3
T2 = 277K
Required:
P
Solution:
n = PV/RT
n = (475000 Pa)(4m3) / (8.314 Pa-m3/mol-K)(290k)
n = 788 moles
P = nRT/V
P = (788 moles)(8.314 Pa-m3/mol-K)(277K)/(6.5m3)
P = 279,204 Pa or 279 kPa
Answer: Here's my answer, I made it step-by-step so you can understand it! <3
Explanation:
To find the centripetal acceleration of the tip of the fan blade, we can use the formula for centripetal acceleration:
a = (v^2) / r
where:
a is the centripetal acceleration,
v is the linear velocity, and
r is the radius of the circular path.
Given that the fan completes 2 rotations every 1.0 second, we can find the angular velocity (ω) using the formula:
ω = (2π * n) / t
where:
ω is the angular velocity,
π is a constant (approximately 3.14),
n is the number of rotations (2),
and t is the time taken (1.0 second).
Substituting the values into the formula, we have:
ω = (2π * 2) / 1.0 = 4π rad/s
Next, we can calculate the linear velocity (v) using the formula:
v = r * ω
Substituting the given radius value (0.61 m) and the angular velocity we found earlier, we have:
v = 0.61 * 4π = 2.44π m/s
Finally, we can calculate the centripetal acceleration (a) using the formula:
a = (v^2) / r
Substituting the linear velocity and the radius, we have:
a = (2.44π)^2 / 0.61 = 5.88π^2 / 0.61 ≈ 96 m/s²
Therefore, the centripetal acceleration of the tip of the fan blade is approximately 96 m/s² (Option 4).
space shuttles
c.
single use rockets
b.
space stations
d.
space probes
AContrast
BFaces
CColors
Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:
AThe edges of objects
BThe center of objects
CThe color of an object
What assumption does our visual system make in order to see curved surfaces (domes, holes)?
ALight comes from above
BCurved surfaces are always evenly lit
CCurved surfaces are always easy to see, no assumptions are made
Which part of the face does our brain pay the most attention to?
AEyes and mouth
BEyes and ears
CEyes and chin
If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?
AIt helps us see things faster
BIt helps us see things correctly
CIt helps us pay attention to what's important
DAll of the above
B. walking
C. swimming
D. all of the above
Answer:
D. All of the above
Explanation:
Newton's third law states that:
"when an object A exerts a force on an object B, object B exerts an equal and opposite force on object A. These forces are called action and reaction"
Let's analyze each situation:
A. when hitting a baseball with a bat --> we have two objects (the baseball and the bat), so we have a pair of forces: the action is the force exerted by the baseball on the bat, while the reaction is the force exerted by the bat on the baseball
B. walking --> in this case, the two objects we should consider are the man walking and the road: the action is the force exerted by the feet of the man on the road, while the reaction is the force exerted by the road on the feet of the man, which allows him walking
C. swimming --> in this case, the two objects we should consider are the man swimming and the water around him: the action is the force exerted by the body of the man on the water, while the reaction is the force exerted by the water on the body of the man, which allows him to swim.
So, all the three choices are correct.