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3 years ago

15

Describe another model in science that you have learned about that you think may have been revised over time as scientists have

gathered new evidence.

1 answer:

Degger [83]3 years ago

6 0

Scientists gather a new evidence like let me say for example jj Thompson said that an atoms is the least particles of an element but according to our definition an atom is the smallest particles of an element so you see

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ololo11 [35]

Potential energy= mass x gravity x height

m=25
g=9.8(on earth)
h=50

Ep= 25(9.8)(50)
Ep=12250 Joules

8 0

3 years ago

A capacitor charging circuit consists of a battery, an uncharged 20 μF capacitor, and a 6.0 kΩ resistor. At t = 0 s the switch i

aliya0001 [1]

Answer:

Battery voltage will be equal to 9.65 volt

Explanation:

We have given capacitance $C=20\mu F=20\times 10^{-6}F$

Resistance $R=6kohm=6000ohm$

Time constant of RC circuit is

$\tau =RC=20\times 10^{-6}\times 6000=0.12sec$

Time is given t = 0.15 sec

Current i = 0.46 mA

Current in RC circuit is given by

$i=\frac{V}{R}e^{\frac{-t}{\tau }}$

$0.00046=\frac{V}{6000}e^{\frac{-0.15}{0.12 }}$

$0.00046=\frac{V}{6000}\times 0.286$

V = 9.65 volt

So battery emf will be equal to 9.65 volt

5 0

3 years ago

A 0.0400-g positive charged ball with charge q = 6.40 μC is resting on a flat, frictionless horizontal surface. For a time of t

Leto [7]

Answer:

The height is 0.1014 m

Explanation:

Given that,

Mass = 0.0400 g

Charge $q= 6.40\ \mu C$

Time t = 0.0420 s

Electric field $E=7.80\times10^{2}\ N/C$

We need to calculate the electric force on the particle

Using formula of electric force

$F=qE$

Put the value into the formula

$F_{e}=6.40\times10^{-6}\times7.80\times10^{2}$

$F_{e}=0.004992= 0.499\times10^{-2}\ N$

We need to calculate the gravitational force

Using formula of force

$F=mg$

Put the value into the formula

$F_{g}=0.0400\times10^{-3}\times9.8$

$F_{g}=0.000392 = 0.392\times10^{-3}\ N$

We need to calculate the net force

$F_{net}=F_{e}-F_{g}$

$F_{net}=0.499\times10^{-2}-0.392\times10^{-3}$

$F_{net}=0.004598= 0.4598\times10^{-2}\ N$

We need to calculate the acceleration

Using newton's law

$F = ma$

$a = \dfrac{F}{m}$

$a=\dfrac{0.4598\times10^{-2}}{0.0400\times10^{-3}}$

$a =114.95\ m/s^2$

We need to calculate the height

Using equation of motion

$s = ut+\dfrac{1}{2}at^2$

$s=0+\dfrac{1}{2}\times114.95\times(0.0420)^2$

$s=0.1014\ m$

Hence, The height is 0.1014 m

3 0

3 years ago

WILL GIVE BRAINLYEST!!!!!!!!!!!!

lakkis [162]

I would say it would be the weight read.

Only because the Control is the type of liquid and the constants are Size of object and amount of liquid

6 0

3 years ago

Read 2 more answers

How can a budget help you set spending goals?

OlgaM077 [116]

<span>When you are setting up your budget, it is easier to start by setting your budgeting amounts based on the average of your last three months of spending. Many budgeting programs can import past transactions and help you come up with the estimates that you need for your budget. Then you can begin to make adjustments after you have those initial amounts.
</span>
The two main goals are to spend less than you earn and to know where your money is going. Once you have a working budget you can work towards your other goals of saving money and getting out of debt. It is important to avoid theses common budgeting mistakes <span>when setting up your budget.

</span>

7 0

3 years ago