If the car is moving west, then the only way to stop it, or even just slow it down, is with a force that's directed <em>toward the east</em>.
<h3><u>Answer;</u></h3>
Smooth muscles
<h3><u>Explanation</u>;</h3>
- Smooth muscles are the muscles that cause blood vessels to dilate and constrict. Smooth muscles forms the supporting tissues of the blood vessels and hollow internal organs such as intestines, bladder, etc.
- Hormones such as vasopressin and Norepinephrine trigger the contraction of smooth muscles and thus constricting the blood vessels.
- When these hormones production is stopped then the smooth muscles will relax and thus dilating the blood vessels.
Answer:
(a) I_A=1/12ML²
(b) I_B=1/3ML²
Explanation:
We know that the moment of inertia of a rod of mass M and lenght L about its center is 1/12ML².
(a) If the rod is bent exactly at its center, the distance from every point of the rod to the axis doesn't change. Since the moment of inertia depends on the distance of every mass to this axis, the moment of inertia remains the same. In other words, I_A=1/12ML².
(b) The two ends and the point where the two segments meet form an isorrectangle triangle. So the distance between the ends d can be calculated using the Pythagorean Theorem:
Next, the point where the two segments meet, the midpoint of the line connecting the two ends of the rod, and an end of the rod form another rectangle triangle, so we can calculate the distance between the two axis x using Pythagorean Theorem again:
Finally, using the Parallel Axis Theorem, we calculate I_B:
Answer:3.185KHz
Explanation:
Where
Length (L) = 2.7cm
Speed (V) = 344m/s
Wavelength of the fundamental standing wave: λ = 4L
λ = 4L
Frequency is the rate per second of a vibration constituting a wave.
Frequency is given as:
F= v/ λ
Therefore,
Frequency= v/4λ
Frequency = 1×(344m/s)/4×(2.7cm)
Convert centimetre to meter
100cm= 1m
Convert Hz to kiloHz
1000Hz= 1kHz
Frequency= 3.185KHz