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BartSMP [9]
3 years ago
8

PLEASE HELPP!!!!!!!!!

Physics
1 answer:
Mama L [17]3 years ago
8 0
I just wannasay i love your cat
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A wave has a frequency of 270 Hz and a wavelength of 60 m. What is the speed of the wave?
mr_godi [17]

Answer:

(none of the options is correct... see below)

Explanation:

Recall that  frequency, wavelength and speed are related by

Velocity (i.e speed) = frequency x wavelength

in our case

Speed  = 270 Hz x 60m = 16,200 m/s

4 0
3 years ago
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Actinium-226 has a half-life of 29 hours. If 10g of actinium-226 disintegrates over a period of 145 hours,
Masteriza [31]

Answer: d) 312.5 mg

Explanation:

This problem can be solved using the Radioactive Half Life Formula:

A=A_{o}.2^{\frac{-t}{h}}  

Where:

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A_{o}=10 g is the initial amount of Actinium-226

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Knowing this, let's find A:

A=(10 g) (2)^{\frac{-145 h}{29 h}}  

A=0.3125 g \frac{1000 mg}{1 g}=312.5 mg  

4 0
3 years ago
If the pressing force on the slidding surfaces is greater then friction will be
Tema [17]

Answer:

Kinetic friction is lesser than limiting friction. Two surfaces are rubbed together, first with a smaller force and then with a greater force.

3 0
3 years ago
PLEASE HELP! I think it's F but I'm not sure... Am I right???
mario62 [17]

c.E ps... that's the answerrr

Explanation:

that's the answer E

7 0
3 years ago
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What is general relativity
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General relativity is a theory of space and time. The theory was published by Albert Einstein in 1915. The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is gravity, matter, energy, and momentum.
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