Their difference lies in the prefix used before each root word, atom. The diatomic molecules are composed only of 2 atoms such as that of the diatomic elements: H2, O2, N2, Cl2, etc. On the other hand, polyatomic molecules are made up of three or mole atoms such as NH4+, H2SO4, etc.
Hi there!
a.
The equation for centripetal acceleration is as follows:
Plug in the given values to solve:
b.
According to Newton's Second Law:
The acceleration is v²/r, so the net force is:
Multiply by the given mass:
c.
There is NO net force in the vertical direction since the object is NOT accelerating in the vertical direction (normal force and weight cancel).
Thus, the ONLY net force experienced by the object is in the horizontal direction and is EQUAL to the centripetal force.
Answer:
20 m/s
Explanation:
The frictional force the road exerts on the car provides the centripetal force that keeps the car in circular motion along the curve:
where
F is the centripetal force
m is the mass of the car
r is the radius of the curve
v is the speed of the car
In this problem we have:
m = 2000 kg
r = 200 m
F = 4000 N is the maximum force
Re-arranging the equation, we can calculate the maximum speed v corresponding to this force:
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➷ After 10,000 years the mass will be:
1,000 / 2 = 500
After 20,000 years the mass will be:
500/2 = 250
As you can see, the correct answer would be A. 20,000 years
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Answer:
<em>Correct answer: 2) 2p</em>
Explanation:
<u>Momentum</u>
Momentum is a measurement of mass in motion or how much mass is in how much motion. The symbol for momentum is p and is defined as:
p = m . v
Where m is the mass of the object and v is the speed. Note this is the scalar version of the formula because both p and v are vectors.
Suppose the mass of the object is doubled to 2m, then the new momentum is:
p' = (2m) . v = 2 m . v
Or, equivalently:
p' = 2p
Correct answer: 2) 2p