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IRINA_888 [86]
3 years ago
13

What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons

Physics
1 answer:
snow_tiger [21]3 years ago
5 0

Mass number = no. of protons + no. of neutrons

 so, it would be, 3+4 = 7

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List how many significant figures the numbers contain. A. 205 cm. B. .00004 cm. C. 20 cm. D. 20. Cm.
stiv31 [10]
A. 205 cm
   This has 3 significant figures: 2,0 and 5.

B. 0.00004 cm
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C. 20 cm
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D. 20. cm
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7 0
3 years ago
A 2.0 x 10^3-kilogram car travels at a constant speed of 12 meters per second around a circular curve of radius 30. meters. What
Vikentia [17]

The magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²

<h3>Circular motion</h3>

From the question, we are to determine the magnitude of the centripetal acceleration.

Centripetal acceleration can be calculated by using the formula

a_{c} =\frac{v^{2} }{r}

Where a_{c} is the centripetal acceleration

v is the velocity

and r is the radius

From the given information

v = 12 \ m/s

and r = 30 \ m

Therefore,

a_{c} =\frac{12^{2} }{30}

a_{c} =\frac{144 }{30}

a_{c} = 4.8\ m/s^{2}

Hence, the magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²

Learn more on circular motion here: brainly.com/question/20905151

4 0
2 years ago
The pressure of a box pushes down on the floor is 50 Pa if the box weighs 400 N what is the area of the base of the box
Wewaii [24]

Answer:8m^2

Explanation:

Area=force÷pressure

Area=400÷50

A=8m^2

5 0
3 years ago
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Rudiy27
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Brilliant_brown [7]

Answer:

Explanation:

x

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