Answer:
which pic...? there is no picture attached to your question
Answer: The yellow layer is definitely older than the red layer
Explanation: According to Nicolaus Steno's law of superposition and original horizontality. Older rocks underlie younger rocks.
Sedimentary rocks are usually deposited in horizontal layers in which each stratigraphic layer is laid down before another can be deposited upon it.
The red layer, in addition to being older, is also likely to have undergone intense oxidation due to earlier exposure.
There's no such thing as "an unbalanced force".
If all of the forces acting on an object all add up to zero, then we say that
<span>the group </span>of forces is balanced. When that happens, the group of forces
has the same effect on the object as if there were no forces on it at all.
An example:
Two people with exactly equal strength are having a tug-of-war. They pull
with equal force in opposite directions. Each person is sweating and straining,
grunting and groaning, and exerting tremendous force. But their forces add up
to zero, and the rope goes nowhere. The <u>group</u> of forces on the rope is balanced.
On the other hand, if one of the offensive linemen is pulling on one end of
the rope, and one of the cheerleaders is pulling on the other end, then their
forces don't add up to zero, because even though they're opposite, they're
not equal. The <u>group</u> of forces is <u>unbalanced</u>, and the rope moves.
A group of forces is either balanced or unbalanced. A single force isn't.
Answer:
<em>a) 2.63 : 1</em>
<em>b) 143.13 rpm</em>
Explanation:
initial angular velocity ω' = 130 rpm
final angular velocity ω = 342 rpm
recall that angular momentum = ωI
where I is the moment of inertia.
for the initial spinning condition, we take moment of inertial = I'
for final spinning condition, we take moment of inertia = I
initial angular momentum = ω'I' = 130 I'
final angular momentum = ωI = 342 I
according to conservation of angular momentum, initial angular momentum must be equal to the final angular momentum, therefore
342 I = 130 I'
ratio of initial moment of inertia to final moment of inertia = I'/I
==> I'/I = 342/130 ≅ <em>2.63 : 1</em>
b) to achieve a final angular velocity of of 375 rpm, her initial velocity will have to be
2.63 = 375/ω'
ω' = 375/2.63 = <em>143.13 rpm</em>
Answer:
Parallel circuit
Explanation:
A parallel circuit is a closed circuit in which current flows and divide in two or more paths and recombining to complete the circuit, each load (light bulb) receives the fully voltage of the batteries in the circuit.
