3 years ago

The periodic table lists all the compounds on Earth. True or False?

Physics

1 answer:

In-s [12.5K]3 years ago

8 0

False. Maybe you were talking about elements? If these were elements then the answer could be TRUE.

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Use the following information to answer the next question.

diamong [38]

Answer:

B. 1.55 × 10³ m/s

Explanation:

f = 3.02 x 10^6 Hz

wavelength = 5.13 x 10^-4 m

v = ?

v = f*lamda

v = 3.02 x 10^6 × 5.13 x 10^-4

v = 1.55 × 10³ m/s

8 0

4 years ago

12. Unmanned Space Probe A 2500 kg unmanned space probe is moving in a straight line at a constant speed of 300 m/s. Control roc

Lena [83]

answer of both parts are attached below

4 0

4 years ago

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13 points!

skelet666 [1.2K]

I think it may be C!

4 0

3 years ago

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A 45.0 g hard-boiled egg moves on the end of a spring with force constant 25.0 N/m. Its initial displacement 0.500 m. A damping

leva [86]

Answer:

0.02896 kg/s

Explanation:

$A_1$ = Initial displacement = 0.5 m

$A21$ = Final displacement = 0.1 m

t = Time taken = 0.5 s

m = Mass of object = 45 g

Displacement is given by

$x=Ae^{-\dfrac{b}{2m}t}cos(\omega t+\phi)$

At maximum displacement

$cos(\omega t+\phi)=1$

$\\\Rightarrow A_2=A_1e^{-\dfrac{b}{2m}t}\\\Rightarrow \dfrac{A_1}{A_2}=e^{\dfrac{b}{2m}t}\\\Rightarrow ln\dfrac{A_1}{A_2}=\dfrac{b}{2m}t\\\Rightarrow b=\dfrac{2m}{t}\times ln\dfrac{A_1}{A_2}\\\Rightarrow b=\dfrac{2\times 0.045}{5}\times ln\dfrac{0.5}{0.1}\\\Rightarrow b=0.02896\ kg/s$

The magnitude of the damping coefficient is 0.02896 kg/s

6 0

4 years ago

An object accelerates to a velocity of 34m/s over a time of 1.3 s the acceleration it experienced was 15 m/s squared what was th

just olya [345]

V=v0+at=>v0=v-at=34-15•1,3=34-19,5=14,5m/s

7 0

3 years ago

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