Answer:
136.27 N
Explanation:
From the question,
The velocity of the pulse is given as
v = L/t................. Equation 1
Where v = velocity of the pulse, L = total length of the pulse, t = time.
Given: L = 4×2×6.48 (as the pulse makes four tips down and back) = 51.84 m, t = 0.877 s.
substitute into equation 1
v = 51.84/0.877
v = 59.11 m/s.
Using,
But,
v = √(T/m')................... Equation 2
Where T tension in the cord, m' = mass per unit length of the cord.
make T the subject of the equation
T = v²m'.................... Equation 3
Given: v = 59.11 m/s, m' = 0.253/6.48 = 0.039 kg/m
Substitute into equation 3
T = 59.11²(0.039)
T = 136.27 N
Hence the tension in the cord = 136.27 N
1900s -- 1980s
Forensic science R&D in the 1980s
Answer:
Carbon dioxide is added to atmosphere naturally when organisms respire or decompose
Or through human activities, such as the burning of fossil fuels and forests and the production of cement.
This molecule is formed between a not very electronegative metal and a very electronegative nonmetal which means it should be an ionic compound which would mean that it would have the name of potassium oxide.
look up the naming rules for ionic compounds. I would explain it here but I don't know how to explain naming the anion part of the molecule other than it ends in ide since it is a monoatomic anion which is why oxide is in the name instead of oxygen.
I hope this helps. Let me know if anything is unclear or needs more explanation.
The given question is incomplete. The complete question is:
Estimate the volume of each ball. Use the formula 
where v is the volume and r is the radius. record the volume in table A of your student guide. The radius of the tennis ball is 2.1 cm and the radius of thr golf ball is 2.0 cm. What is the estimated volume of the table tennis ball in 
What is the estimated volume of the golf ball in
Answer: Volume of the tennis ball is 
and Volume of the golf ball is 
Explanation:
We have to find the Volume of tennis ball and golf ball by using the formula
Radius of the tennis ball = 2.1 cm
Radius of the golf ball =2.0 cm.
Putting the value of radius in the formula , we get:
Volume of the tennis ball = 
Volume of the golf ball = 
Volume of the tennis ball is and Volume of the golf ball is
