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Marianna [84]
4 years ago
14

How many neutrons would a element that has a atomic number of 22 and a atomic mass of 40 have? (this is not based on a element f

ound in the periodic table)
18

40

22

20
Physics
1 answer:
nlexa [21]4 years ago
4 0

Answer:

18

Explanation:

The mass is equal to the total number of prtons and neutrons

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The diagram shows the trajectory of a ball that
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69 MPH

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Michael's house is 5.0 km away from his school. How long would it take him to go ti school, riding a bus, if its velocity is 25
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12 mins

Explanation:

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8 0
3 years ago
If an object is thrown upward with an initial velocity of 128 ​ft/second, then its height after t seconds is given by the follow
IrinaK [193]

Answer:

The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

Explanation:

Given that,

Initial velocity u= 128 ft/sec

Equation of height

h = 128t-32t^2....(I)

(a). We need to calculate the maximum height

Firstly we need to calculate the time

\dfrac{dh}{dt}=0

From equation (I)

\dfrac{dh}{dt}=128-64t

128-64t=0

t=\dfrac{128}{64}

t=2\ sec

Now, for maximum height

Put the value of t in equation (I)

h =128\times2-32\times4

h=128\ ft

(b). The number of seconds it takes the object to hit the ground.

We know that, when the object reaches ground the height becomes zero

128t-32t^2=0

t(128-32t)=0

128=32t

t=4\ sec

Hence, The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

3 0
3 years ago
The electric force between two charged objects depends on which of the following
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<span>The electric force between two charged objects depends on
the product of their charges and the distance between them.</span>
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according to the law of conservation of energy what ultimatly happens to the total amount of energy in the universe?
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3 years ago
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