Answer:
Im pretty sure it's C
Explanation:
The answer A talks about constant speed, which does not correspond to Net Force. The answer B, talks about constant velocity, but talks about how much force apposes the box. The answer C talks about the value of the net force acting on the box, so im pretty sure the answer is C.
... low frequency and high amplitude.
Answer:
Total time = 10.667 seconds
Explanation:
For the first 12m
V² = u² + 2as
10.5² = 0² + 2a(12)
110.25 = 24a
a = 4.59375 m/s²
V = u + at
10.5 = 0 + 4.59375t
t = 10.5/4.59375
t = 2.286 seconds
For the remaining race
100-12 = 88m
He travels at a constant speed for 88m
S = ut + 1/2(at²)
But a = 0
S = ut
88= 10.5t
t = 88/10.5
t = 8.38.seconds
Total time = 2.286 + 8.381
Total time = 10.667 seconds
The answer to number 9 is C, decreased muscle tension. I believe number 10 is D, prepares an organism to respond to stress.
Answer:
0.25 gram of neptunium is remaining
Explanation:
First we calculate the no. of half lives passed. For that we have formula:
n = t/T
where,
n = no. of half lives passed = ?
t = total time passed = 8 days (From Monday noon to Tuesday noon of following week)
T = Half Life Period = 2 days
Therefore,
n = 8 days/2 days
n = 4
Now, for the remaining mass of neptunium, we use the formula:
m = (mi)/(2)^n
where,
mi = initial mass of neptunium = 4.00 grams
m = remaining mass of neptunium = ?
Therefore,
m = 4 grams/2⁴
<u>m = 0.25 gram</u>
