3 years ago

A 0.300 kg mass is attached to

Physics

1 answer:

vekshin13 years ago

5 0

Answer:0.144j

Explanation:

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In this activity, you’ll read two articles about plastics that analyze the material from two different points of view. You’ll al

ipn [44]

Answer:

ok thanks

Explanation:

I will read the article

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3 years ago

Can somebody please help me with these questions? picture included

oksano4ka [1.4K]

#1). neutrons

#2). atomic number

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4 years ago

A tank contains 150 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu

nikitadnepr [17]

Answer:

The number A(t) of grams of salt in the tank at time t is $A(t) = 150 - 110 e^{-\frac{t}{50} }$

Explanation:

Knowing

$\frac{dA}{dt} = Rin - Rout$

First we have to find the Rin and Rout

Rin = (concentration of the salt inflow) * (input rate of brine)

Rin = 1 g/L * 3 L/min = 3 g/L

Rout = (concentration of the salt outflow) * (output rate of brine)

Rout = ( $\frac{A(t)}{150} g/L$ ) * (3 L/min) = $\frac{A(t)}{50} g/min$

Substituting this results

$\frac{dA}{dt}$ = 3 - $\frac{A(t)}{50}$ --> $\frac{dA}{dt} + \frac{1}{50} A(t) = 4$

Thus, integration factors is

$e^{ \int\limits^._. {\frac{1}{50} } \, dt } = e^{\frac{t}{50} }$

$e^{\frac{t}{50} } \frac{dA}{dt} + \frac{1}{50} e^{\frac{t}{50}$ A(t) = 4 $e^{\frac{t}{50} }$

$e^{\frac{t}{50} } A(t) = \int\limits^._. {3 e^{\frac{t}{50} } } \, dt\\ \\A(t) = 150 + c e^{-\frac{t}{50} }$

Applying the initial conditions

A(0) = 40

c = 150 - 40 = 110

Now, substitute this result in the solution to get

$A(t) = 150 - 110 e^{-\frac{t}{50} }$

8 0

4 years ago

If you use a force of 90 N to pick up a 10 pound bag of charcoal, what is the acceleration?

hjlf

Answer:

9ms^2

Explanation:

since ,Force=mass*acceleration

then, acceleration=force/mass

and, Force=90N

Mass=10pound

therefore, acceleration=90/10

=9ms^2

8 0

3 years ago

Which statement best describes beaches? Beaches change over time as waves move further up the shore. Beaches are always changing

NemiM [27]

Answer:

I think the 1st statement is right.

Explanation:

Wind patterns doesn't stay the same.

Waves don't follow the same patterns.

Waves move further up the shore.

I didn't hear about "waves adding" before..so i guess 1st statement is right.

3 0

3 years ago