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Mama L [17]
3 years ago
12

Desmond is a scientist working with a culture of bacteria. 2500 bacteria in a petri dish are growing at a rate of 3% per second.

Which expression represents the number of bacteria in the petri dish after t seconds? options : p=2500e.03t p=2500⋅(1.03)t p=2500.03t p=2500e1.03t
Physics
1 answer:
satela [25.4K]3 years ago
5 0

Answer:

P = 2500 (1.03)^t

Explanation:

The bacteria grow exponentially. The initial number is 2500, and the growth rate is 3%, so the expression is:

P = 2500 (1.03)^t

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nikklg [1K]

Answer:

v=0.94 m/s

Explanation:

Given that

M= 5.67 kg

k= 150 N/m

m=1 kg

μ = 0.45

The maximum acceleration of upper block can be μ g.

 a= μ g                          ( g = 10 m/s²)

The maximum acceleration of system will ω²X.

ω = natural frequency

X=maximum displacement

For top stop slipping

μ g  =ω²X

We know for spring mass system natural frequency given as

\omega=\sqrt{\dfrac{k}{M+m}}

By putting the values

\omega=\sqrt{\dfrac{150}{5.67+1}}

ω = 4.47 rad/s

μ g  =ω²X

By putting the values

0.45 x 10 = 4.47² X

X = 0.2 m

From energy conservation

\dfrac{1}{2}kX^2=\dfrac{1}{2}(m+M)v^2

kX^2=(m+M)v^2

150 x 0.2²=6.67 v²

v=0.94 m/s

This is the maximum speed of system.

7 0
3 years ago
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A list of different ions are below. Which combinations of ions will result in an ionic bond?
kenny6666 [7]
Ionic bond is a type of bond formed between a non metal and a metal, it involves transfer of electrons that results to formation of ions, normally a cation and an anion. In this case the combinations that will result to ionic bonds include;
NaF, LiCl, NaO2, BeF2, and BeS
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Answer:

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Explanation:

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So, to measure the current flowing through a circuit with an ammeter, the ammeter must be connected in series with the circuit.

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3 years ago
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7nadin3 [17]

Hi!


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3 0
3 years ago
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Bottlenose dolphins use echolocation pulses with a frequency of about 100 kHz, higher than the frequencies used by most bats. Wh
Alinara [238K]

Answer:

1. greater

2. direct

3. smaller

4. inverse

Explanation:

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To "see" an object via the echolocation creature needs to use sound with the wavelength <u>smaller </u>than the size of an object viewed.

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