A and B are equivalent. That's one way instruments are often grouped. (the "sopranos", the "altos", the "bass")
C is another way instruments are often grouped; (the "woods", the "brass")
D is another way instruments are often grouped; (the "strings", the "percussions")
You are correct earth science is studied to predict planetery changes
I think the correct answer is D: Potential Energy.
Answer:
21s
Explanation:
Given parameters;
Radius = 10m
Speed or velocity = 3m/s
Unknown:
Period = ?
Solution:
To solve this problem, use the expression:
v =
r is the radius
T is the unknown
Input the parameters and solve for T;
3 =
62.84 = 3T
T = 21s
Answer:
F=12.5N
Explanation:
Net force = rate of change of momentum

so find the change of momentum P
Pdown

Pup

dP = change in P

so