Answer:
<em>The range is 35.35 m</em>
Explanation:
<u>Projectile Motion</u>
It's the type of motion that experiences an object projected near the Earth's surface and moves along a curved path exclusively under the action of gravity.
Being vo the initial speed of the object, θ the initial launch angle, and 
the acceleration of gravity, then the maximum horizontal distance traveled by the object (also called Range) is:
The projectile was launched at an angle of θ=30° with an initial speed vo=20 m/s. Calculating the range:
The range is 35.35 m
Which two aspects of sound go together?
- <em>P</em><em>i</em><em>t</em><em>ch and frequency</em>
<u>Pitch</u><u> </u><u>and</u><u> </u><u>frequency</u><u> </u><u>are</u><u> </u><u>two</u><u> </u><u>aspects</u><u> </u><u>of</u><u> </u><u>sound</u><u> </u><u>that</u><u> </u><u>go</u><u> </u><u>together</u><u>.</u><u> </u><u>Pitch</u><u> </u><u>means</u><u> </u><u>Higness</u><u> </u><u>or</u><u> </u><u>Lowness</u><u> </u><u>of</u><u> </u><u>sound</u><u>.</u><u> </u><u>F</u><u>r</u><u>e</u><u>q</u><u>u</u><u>e</u><u>n</u><u>c</u><u>y</u><u> </u><u>is</u><u> </u><u>the measurement of the number of times that a repeated event occurs per unit of time.</u><u>.</u><u>.</u><u>~</u>
The bimetallic strip in a fire alarm is made of two metals with different expansion rates bonded together to form one piece of metal. Typically, the low-expansion side is made of a nickel-iron alloy called Invar, while the high-expansion side is an alloy of copper or nickel. The strip is electrically energized with a low-voltage current. When the strip is heated by fire, the high-expansion side bends the strip toward an electrical contact. When the strip touches that contact, it completes a circuit that triggers the alarm to sound. The width of the gap between the contacts determines the temperature that will set off the alarm.
Answer:
Explanation:
20.1 + 2.00100 +48.28 + 0.015 = 70.396 ≈ 70.4
3 s.f. 6 s.f. 4 s.f. 3 s.f 3 s.f
Answer:
The number of coils of wire around the core
Explanation:
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