1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lorico [155]
3 years ago
15

An atomic nucleus is composed of A) protons. B) protons and neutrons. C) protons and electrons. D) protons, neutrons, and electr

ons.
Physics
2 answers:
vesna_86 [32]3 years ago
4 0

The atomic nucleus is made up of two particles that are protons and neutrons.

Answer: Option B.

<u>Explanation: </u>

The atom has the core part as the nucleus in the center part of the atom. The nucleus consists of two particles. These are namely, protons and neutrons.

Proton contains a positive charge but whereas the neutron does not have any charges; therefore, the nucleus acquires the positive charge of the proton. Both of them together constitute the atomic mass and the mass number.  

8090 [49]3 years ago
3 0

Answer:

B

Explanation:

The nucleus is made up of protons and neutrons, and electrons float around the neucleus in the electron cloud.

You might be interested in
An engine does 25 J of work and exhausts 20 J of waste heat during each cycle. If the cold-reservoir temperature is 30 ∘C, what
hodyreva [135]

Answer:

 T₂=659.25 K

Explanation:

Given that

W= 25 J

Qr = 20  J

T₁ = 20⁰ = 20 +273 = 293 K

The minimum temperature of the hot reservoir = T₂

If the engine is Carnot engine then

Qa= W+ Qr

Qa=25 + 20 J

Qa= 45 J

\dfrac{Qa}{Qr}=\dfrac{T_2}{T_1}

T_2=\dfrac{Qa}{Qr}\times T_1

T_2=\dfrac{45}{20}\times 293\ K

T₂=659.25 K

Therefore the temperature of hot reservoir will be 659.25 K

4 0
4 years ago
Which of the following equations illustrates the law of conservation of<br> matter?
vagabundo [1.1K]

Answer:

I see no eaquations?

It should be matter=constant

3 0
3 years ago
The length and width of a rectangle are 1.82 cm and 1.5 cm respectively. Calculate area of the rectangle and write in correct si
Nezavi [6.7K]

Answer:

Hey mate ,

Area of rectangle = l×b

1.82×1.5

2.73cm2

8 0
3 years ago
A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how
Nata [24]

Answer:

C. 72

Explanation:

Transformer: A transformer is an electromagnetic device that uses the property of mutual inductance to change the voltage of alternating supply.

In a ideal transformer,

Vs/Vp = Ns/Np ............................................. Equation 1

Where Vp = primary voltage, Vs = secondary voltage, Ns = Secondary turn, Np = primary turn.

Making Ns the subject of the equation,

Ns =(Vs/Vp)Np .......................................... Equation 2

Given: Vs = 24 V, Vp = 115 V, Np = 345.

Substitute into equation 2

Ns = (24/115)345

Ns = 72 turns.

Thus the number of turns in the secondary = 72 turns.

The right option is C. 72

4 0
3 years ago
A published hypothesis:
kow [346]

Answer:

should be tested by the scientific community

4 0
3 years ago
Other questions:
  • The buoyant force acting on an object is always equal to
    9·2 answers
  • The slope of a distance time graph is a measurement called
    10·1 answer
  • This type of stretch prepares your muscles to exercise or participate in sports.
    5·1 answer
  • A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person's hand at
    10·2 answers
  • Which of these most likely causes an annular solar eclipse?
    6·2 answers
  • If the torque required to loosen a nut holding a wheel on a car is 48 N · m, what force must be exerted at the end of a 0.23 m l
    10·1 answer
  • A man has a power of 90 W and mass 60 kg runs up a staircase in 40 s. If each staircase is 20cm high find the number of steps? (
    9·1 answer
  • the Earth which is 150 million km from the Sun takes 365 days to complete one orbit assume the orbit to be in a circle find the
    14·1 answer
  • HELP HELP HELP I WILL MARK AS BRAINLIEST
    13·2 answers
  • Question 12 of 20
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!