Answer:
B) 33 m C) 27 m
Explanation:
considering that the two pucks are sliding toward each other we can understand that they are on a collision course.
Since the total distance between them is 26 m, the common sense dictates that the distance traveled by each puck must be less than 26 m regardless of the speed of the two pucks.
so the options B) 33 m and C) 27 m are definitely wrong since they are greater than 26 m.
We can also easily find the distance traveled by each pucks also.
let 
and 
be the velocity of the pucks A and B respectively
Answer:
C. A
Explanation:
Centripetal acceleration is directed to the center of the circle.
500 miles
Explanation:
100 miles an HOUR
There are 5 hours
We will times 100 by 5 to get 500.
Which means the train traveled about 500 miles! :)
Answer:
binding energy is 99771 J/mol
Exlanation:
given data
threshold frequency = 2.50 × 
Hz
solution
we get here binding energy using threshold frequency of the metal that is express as
..................1
here E is the energy of electron per atom 
and h is plank constant i.e. 
and x is binding energy
and here N is the Avogadro constant = 
so E will 
E = 
so put value in equation 1 we get
= 2.50 × ×
solve it we get
x = 99770.99
so binding energy is 99771 J/mol
The principle energy level hope it helps.
