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erastova [34]
3 years ago
5

Lithium has 3 protons, 3 electrons, and 4 neutrons. How much is the positive charge of this atom?

Physics
1 answer:
yanalaym [24]3 years ago
6 0

Answer:If you add a proton to the atom, it becomes beryllium (atomic number = 4).

It is an ion with a +1 charge, since the number of protons (4) no longer equals

the number of electrons (3).

So you have a beryllium +1 ion - the best answer choice is C.

Explanation:if this isn’t right I am so sorry

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Matter that organisms require for their life processes are
hram777 [196]

Answer:

nutrients

Explanation:

Nutrients are matter that organisms require for their life processes.

5 0
3 years ago
Lila is a track and field athlete. She must complete four laps around a circular track. The track itself is a 400 meter track an
fgiga [73]

Answer: 4.45m/s

Explanation:

I assume we're solving for her speed.

400m x 4 laps = 1600m

1600m / 6 minutes = 266.67m/min

(266.67m/min) x (1 minute/60 seconds) = 4.45m/s

266.67/60 = 4.45m/s

6 0
3 years ago
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A 9.0-V battery is connected to a resistor so that there is a 0.50-A current through the resistor.For how long should the batter
salantis [7]

Answer:

35.6 s

Explanation:

The power through the resistor is given by:

P=VI

where V=9.0 V is the voltage and I=0.50 A is the current. Substituting into the formula, we find

P=(9.0 V)(0.5 A)=4.5 W

The power is also equal to:

P=\frac{W}{t}

where W is the work done while t is the time taken. Since we know the work done, W=160 J, we can re-arrange the equation to find the time taken:

t=\frac{W}{P}=\frac{160 J}{4.5 W}=35.6 s

7 0
4 years ago
Is scientific law and scientific theory the same?<br> True or false??<br><br> PLEASE HELP ME
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Is the sciencetjfic law and security theory the same?



TRUE
8 0
4 years ago
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A cube of metal has a mass of 11 grams and a volume of 1 cm . When fully submerged in water this metal cube hanging from an accu
Anarel [89]

Answer:

0.098 N

Explanation:

From the question,

Spring scale reading = W-U............... Equation 1

Where W = weight of the cube, U = upthrust.

W = mg

Where m =  mass of the cube, g = acceleration due to gravity.

Given: m = 11 g = 0.011 kg, g = 9.8 m/s².

W = 0.011(9.8)

W = 0.1078 N.

From Archimedes principle,

Upthrust = weight of water displaced.

U = (Density of water×volume of metal cube)×acceleration due to gravity.

U = (D×V)g

Given: D = 1000 kg/m², V = 1 cm³ = (1/1000000) = 1×10⁻⁶ m³, g - 9.8 m/s²

U = 1000(9.8)(10⁻⁶)

U = 0.0098 N.

Substitute the value of W and U into equation 1

Reading of the spring scale = 0.1078-0.0098

Reading of the spring scale = 0.098 N

7 0
4 years ago
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