The answer is B. because NaCl are just two elements with one atom from each element
Answer:
Explanation:
Let l be th length of pendulum
loss of height
= mg ( l - l cos50)
= mg l ( 1-cos50)
1/2 mv² = mgl ( 1-cos50)
v = √[2gl( 1- cos50)]
= √( 2 x 9.8 x .7 x ( 1-cos50)
= 2.2 m / s
speed at the bottom = 2.2 m /s
b )
centripetal acceleration
= v² / r
= 2.2 x 2.2 / .7
= 6.9 m /s²
C )
If T be the tension
T - mg = mv² / r
T = mg + mv² / r
= .13 X 9.8 + .13 X 6.9
= 2.17 N
If it is GAINING mass, the kinetic energy increases because it's still moving. If it stopped, it would then become potential energy.
yw XD
(just answered the same question just different user)
Answer:
c) The concepts of quantitative and qualitative are not related at all.
Explanation:
Quantitative properties are those which can be compared by its magnitude only
so it is always in relative terms like we can compare them by which one is larger and which one is smaller
Qualitative terms are those which will compare the quality of two like which one is better in terms of given property
so here we can say that quantitative and qualitative terms is not comparable
hence correct answer will be
c) The concepts of quantitative and qualitative are not related at all.
Vectorial form:
3.6 m east => 3i
6.0 north => 6 j
Final position = 3.6i + 6j
Magnitude = √[ (3.6)^2 + 6^2] = √[12.96 + 36] = √48.96 = 7.0 m
Direction => arc tan (6/3.6) = arc tan (1.67) = 59.0 °
Answer: the dog is at 7.0 m, 59.0° to the north of the east from the starting point.
