Answer by YourHope:
Hi! ^-^
At what age is a child likely to learn to sit up without support?
I would say Five months if you position the child but Nine months for the baby to sit up by themselves! So the answer is Nine months!
Have a BEAUTIFUL day~
Answer:
The average atomic mass of element X is 17.561 u.
Explanation:
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Mass of isotope X-17 = 17 u
Percentage abundance of isotope X-17 = 65.20 %
Fractional abundance of isotope 1 = 0.6520
Mass of isotope X-18 = 18 u
Percentage abundance of isotope X-18 = 13.50 %
Fractional abundance of isotope X-18 = 0.1350
Mass of isotope X-19 = 19 u
Percentage abundance of isotope X-19 =21.30%
Fractional abundance of isotope X-19 = 0.2130
Putting values in equation 1, we get:
![\text{Average atomic mass of Z}=\sum[(17 u\times0.6520 )+(18 u\times 0.1350)+(19 u\times 0.2130)]](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20atomic%20mass%20of%20Z%7D%3D%5Csum%5B%2817%20u%5Ctimes0.6520%20%29%2B%2818%20u%5Ctimes%200.1350%29%2B%2819%20u%5Ctimes%200.2130%29%5D)
Answer:
Given force=10lb
L1=4in converting to feet
But 0.08333ft= 1 inch
Then 4 inch is 0.3332
6inch is 0.49998
But hookes law states
F=Kx where F is force,K is the force constant ,X
K=F/X=10/0.3333=30N/m
Integrating this
Integral of 30x with limit 0.333 to 0.5
F=30x^2/2=15x^2substing the limit
F=(15(0.5^2-0.33^2)=2.08ft-lb
Explanation:
Answer:
The pH scale was invented by Svante Arrhenius is false.
Explanation :
because the pH scale was invented by Soren Sorensen
Answer:
The answer is A
Explanation:
When a rockets thrusters push on the ground the ground pushes back on the rocket with equal force in the opposite direction. Hence the rocket takes off.
Newtons third law of motion states, for every action there is an equal and opposite reaction.
