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Naddika [18.5K]
3 years ago
8

Help 10 points!

Physics
1 answer:
adell [148]3 years ago
3 0

chemical energy into mechanical energy as well as heat.

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NET FORCE ( PLEASE ANSWER ASAP )
slava [35]

First picture (black background):  50 Newtons UP

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4 years ago
Suppose a rock is dropped off a cliff with an initial speed of 0m/s. What is the rocks speed after 5 secounds, in m/s, if it enc
Tasya [4]

Answer:

The rock's speed after 5 seconds is 98 m/s.

Explanation:

A rock is dropped off a cliff.

It had an initial velocity of 0 m/s. And now it is moving downwards under the influence of gravitational force with the gravitational acceleration of 9.8 m/s².

Speed after 5 seconds = V

We know that acceleration = average speed/time

In our case,

g = ((0+V)/2)/5

9.8*5 = V/2

=> V = 2*9.8*5

V = 98 m/s

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3 years ago
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Answer:

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3 years ago
A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is 7.0
krok68 [10]

Answer:

(a) T=6.07s

(b) x_{max|4.0s}=3.62cm

Explanation:

For Part (a)

The initial amplitude is given as A=7.0 cm

Apply the equation x_{max}(t)=Ae^{-t/T} with  x_{max}(7.6s)=2.0cm we have:

x_{max}(t)=Ae^{-t/T}\\2.0cm=(7.0cm)e^{-7.6s/T}\\T=-\frac{7.6s}{ln(\frac{2.0cm}{7.0cm} )} \\T=6.07s

For Part (b)

Apply x_{max}(t)=Ae^{-t/T}  with t=4.0s and T=6.07s we have

x_{max}(t)=Ae^{-t/T}\\x_{max}(4.0s)=(7.0cm)e^{-4.0/6.07}\\x_{max|4.0s}=3.62cm

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4 years ago
What are the general characteristics of a liquid
erastova [34]

Liquids have definite volume, but indefinite shape. They are free to form droplets and puddles when they are not inside a container. When a liquid is inside a container, it will take its shape. Unlike gases, a liquid will not change its volume to spread out and completely fill a container.

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3 years ago
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