the answer is cancer is often named according to what body type it affects
Answer:
Explanation:
- distance travelled by the sound,
- speed of sound in air,
- difference of time time between the two pulses of sound,
<em>Now, we find the time taken by the sound in air to travel the given distance:</em>
∴<u>Time taken by the sound sound waves in the metal bar to travel the given distance:</u>
<u>The speed of sound in the metallic bar:</u>
The answer is (a)/This description needs a unit ....measurement.
Because this will only tell us whether the temp. is in Celsius, fahrenheit or kelvin
Answer:
(a) h = 5.1 m
(b) v = 14.13 m/s
Explanation:
(a)
We will use the law of conservation of energy. For this situation it states that:
Loss in Potential Energy of Sphere = Gain in Kinetic Energy of the Sphere
mgh = (1/2)mv²
h = v²/2g --------------- equation (1)
where,
h = height = ?
v = speed at lowest point = 10 m/s
g = 9.8 m/s²
Therefore,
h = (10 m/s)²/(2)(9.8 m/s²)
<u>h = 5.1 m</u>
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(b)
using the equation (1)
h = v²/2g
v = √2gh
where,
v = velocity = ?
g = 9.8 m/s²
h = height = 2(5.1 m) = 10.2 m
Therefore,
v = √[2(9.8 m/s²)(10.2 m)]
<u>v = 14.13 m/s</u>