Answer:
B, the number of protons.
Explanation:
It is the number of protons found in the nucleus of the atom.
<h3><u>Answer;</u></h3>
- Heat is produced
- Light is produced
- Bubbles appear
<h3><u>Explanation;</u></h3>
- Chemical reactions involve the chemical interaction of two or more chemical substances, result in a new substance being formed, and are usually irreversible.
- The signs of chemical reactions include gas formation, energy release in the form of light or flame, heat absorption, precipitate formation, and color change.
Step by step solution :
standard deviation is given by :
where, 
is standard deviation
is mean of given data
n is number of observations
From the above data, 
Now, if 
, then 
If 
, then 
if 
, then 
If 
, then 
If 
, then 
so, 
No, Joe's value does not agree with the accepted value of 25.9 seconds. This shows a lots of errors.
Answer:
56.86153 N
Explanation:
t =Time taken
F = Force
Power
Work done
The magnitude of the force that is exerted on the handle is 56.86153 N
This problem is to let you practice using Newton's second law of motion:
Force = (mass) x (acceleration)
-- The airplane's mass when it takes off (before it burns any of its load of fuel) is 320,000 kg.
-- The force available is (240,000 N/per engine) x (4 engines) = 960,000 N.
-- Now you know ' F ' and ' mass '. Use Newton's second law of motion to calculate the plane's acceleration.
