Answer:
Plutonium is the second transuranium element of the actinide series.
Atomic mass is the decimal number that is on the periodic table...
Boron's atomic mass is 10.81
Potassium is an alkali metal with the chemical symbol K. It has an atomic number of 19, meaning that it has 19 positively charged protons. It also contains 19 electrons, which have a negative charge, and 20 neutrons, which do not hold a charge
Hope this help
Q= ? kJ
m= 1.37 kg ×
![\frac{1000 g}{1kg}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1000%20g%7D%7B1kg%7D%20)
=1370 g<u>
</u>
c=4.18 J/g° C
ΔΤ= <span>89.5-21.3=
68.2˚C
</span>?
J = (1370
g) (4.18
J/g˚C) <span>(68.2˚C)
</span>q
= 390,554 J×
![\frac{1kJ}{1000J}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1kJ%7D%7B1000J%7D%20)
<u />
q
= 391 kJ
Answer: C. A force applied to the cart pushing or pulling it forward
Explanation: (I hope this is correct)