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Katena32 [7]
3 years ago
10

What does the atomic number of an element represent? Question 21 options: A. the number of protons in an atom B. the number of n

eutrons in an atom the mass of an atom C. the total number of protons, neutrons, and electrons in an atom D. the order in which the element was discovered
Physics
1 answer:
Lorico [155]3 years ago
6 0

Answer:

A. the number of protons in an atom

Explanation:

The atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom.

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A pendulum bob is made of a ball filled with water. What would happen to the frequency of vibration of this pendulum if a hole i
dlinn [17]

Answer:

Frequency will not change.

Explanation:

As you know, Time period 'T' = 2π x √(L/g)

where,

L= the length of the pendulum

g=  acceleration due to gravity

and Frequency 'f' is the reciprocal of period.f=1/T

From above, we can conclude that frequency is not dependent on mass.

It depends upon the acceleration due to gravity 'g' and the length of the pendulum 'L'

So, if a hole in the ball allowed water to slowly leak out, frequency would not change

3 0
4 years ago
A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the
Kay [80]
To answer this problem first is to analyze and understand the problem first and then consider the given and also the gravity that is exert in the ball. Base on my calculation and the use of the formulas the answer are the following:
A. The initial velocity is <span>29.43 m/s
b. The height it reaches is 132.435m</span>
3 0
3 years ago
An object of mass 4 kg is initially at rest on a frictionless ice rink. It suddenly explodes into three pieces (I have no idea w
Rina8888 [55]

We have two events that occurred on different axes, the most convenient is to perform the operations on the two axes, and then look for the resulting force.

Our values are,

m_1=1kg\\m_2 = 2kg\\v_1' = 1.2m/s\\v_1''= 0.8m/s

PAR A) For the X axis, we apply momentum conservation, which is given by,

Total momentum before = Total momentum After

We start from rest, so in X the initial speeds are 0,

m_1v_1+m_2v_2=m_1v_1'+m_2v_2'

0+0 = (1*1.2)+(1)v_2'

V_2' = -1.2m/s

Now we apply for the conservation of the moment, it is part of the rest, so,

m_1v_1+m_2v_2=m_1v_1''+m_2v_2''

0+0=2*0.8+1*v_2''

v_2'' = -1.6

To find the total speed, we simply apply pitagoras,

V = \sqrt{v_2'^2+v_2^2''}

V = \sqrt{1.2^2+1.6^2}

V = 2m/s

PART B) The address is given by,

tan\theta = \frac{V_2''}{V_2'}

\theta = tan^{-1} \frac{V_2''}{V_2'}

\theta = tan^{-1} \frac{1.6}{1.2}

\theta = 53.31\° (Below -x axis)

6 0
4 years ago
A straight current-carrying wire carries a current I. If the magnetic field at a distance d from the wire has magnitude B, what
sveta [45]

0.07  is the magnitude of the magnetic field at a distance of 2d from the wire

To learn more about the magnitude of the magnetic field please visit -
brainly.com/question/15232285
#SPJ4

6 0
2 years ago
Consider two conducting spheres with one having a larger radius than the other. Both spheres carry the same amount of excess cha
RSB [31]

Answer: Option (a) is the correct answer.

Explanation:

It is known that potential energy is the energy occupied by an object or substance due to its position is known as potential energy.

Therefore, more is the space occupied by an object more will be its position at a particular location. Hence, more will be its potential energy. On the other hand, smaller is the space occupied by an object, smaller will be the position holded by it.

Hence, smaller will be its potential energy.

Thus, we can conclude that for the given situation the statement, potential energy of the larger sphere is greater than that of the smaller sphere, is true.

6 0
4 years ago
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