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lidiya [134]
3 years ago
13

F an element has the atomic mass (

Physics
1 answer:
Nina [5.8K]3 years ago
8 0
Dont know but i think is 567
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During which period did the first large herbivores and carnivores appear?
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The first large herbivores and carnivores appeared during the Mesozoic Era, which is divided into three periods-- Triassic, Jurassic and Cretaceous. The herbivores and and carnivores increased in size during the Jurassic Period. And some of the largest dinosaurs emerged during this period as well.
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A force of 333 N is applied 33 cm from the pivot point. What is the maximum torque of this situation
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Answer: 109.89 Nm

Explanation:

The maximum torque will be calculated as the force multiplied by the perpendicular distance. This will be:

Torque = force × perpendicular distance

torque = 333 × 0.33

= 109.89 Nm

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3 years ago
A stationary sub uses sonar to send a 1.18x10^3 hertz sound wave through ocean water. The reflected sound wave from the flat oce
vampirchik [111]

Answer:

a) v = 1524.7 m/s

b) T = 8.47*10^-4 s

   λ = 1.29 m

Explanation:

a) First, in order to calculate the speed of the sound wave, you take into account that the velocity is constant, then, you use the following formula:

v=\frac{d}{t}

d: distance traveled by the sound wave, which is twice the distance to the ocean bottom = 2*324 m = 648 m

t: time that sound wave takes to return to the sub = 0.425

v=\frac{648m}{0.425s}=1524.7\frac{m}{s}

hence, the speed of the sound wave is 1524.7 m/s

b) Next, with the value of the velocity of the wave you can calculate the wavelength of the wave, by using the following formula:

v=\lambda f\\\\\lambda=\frac{v}{f}

f: frequency = 1.18*10^3 Hz

\lambda=\frac{1524.7m/s}{1.18*10^3s^{-1}}=1.29m

And the period is:

T=\frac{1}{f}=\frac{1}{1.18*10^3s^{-1}}=8.47*10^{-4}s

hence, the wavelength and period of the sound wave is, respectively, 1.29m and 8.47*10^-4 s

5 0
3 years ago
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