Which statement(s) correctly compare the masses of protons, neutrons, and electrons?
Answers
Neutrons and protons make up a nucleus and they are in the middle of an atom. Electrons surround the nucleus. Opposite charges attract each other. Because of this, protons do not attract other protons and electrons do not attract other electrons. Instead, protons attract electrons and electrons attract protons. When someone looks at the elements on the periodic table, they can see how many protons are present by looking at the atomic number. Since atoms have to have an equal amount of each, if an element contains 36 protons, it also has 36 electrons.
Related Questions
On Earth's surface, the weight of an object equals the product of its mass and _____.v, the speed of the objectG, the constant of universal gravitationg, the constant of acceleration due to gravityF, the magnitude of the net force acting on the object
What came before the big bang is one of the primary unanswered questions about the origin of _____.
What are the different types of energy stores and what they do?
Pls help me this is being timed. pls.
Answers
The correct answer to the question is - A) Object's kinetic energy is transformed into mainly heat energy.
EXPLANATION:
The friction is the opposing force which acts tangentially between two surfaces when there is a relative velocity between them.
As per the question, the moving object comes to rest after the application of frictional force.
Initially the object is in motion.Hence, the energy possessed by the moving object is kinetic energy.
When frictional force is applied on the moving object, the kinetic energy of the moving object will be converted into mainly heat energy. It is due to the fact that friction causes heat production between two surfaces in contact.
Hence, correct option will be that the object's kinetic energy is transformed into mainly heat energy.
That "heat energy" is called fricton
O A. Nitrogen, N
O B. Aluminum, Al
O C. Phosphorus, P
D. Boron, B
Answers
Final answer:
The elements that would form positive ions with a +3 charge are aluminum (Al) and boron (B).
Explanation:
Based on their locations on the periodic table, the two elements that would form positive ions with a +3 charge are aluminum (Al) and boron (B).
When an element gains or loses electrons to form an ion, it takes on a charge that corresponds to the number of electrons gained or lost. Aluminum, located in Group 13 of the periodic table, tends to lose its three valence electrons to form an ion with a +3 charge. Likewise, boron, located in Group 13 as well, will also lose its three valence electrons to achieve a +3 charge.
Learn more about positive ions with a +3 charge here:
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Answer:
i think it would be B. Aluminum, Al and D. Boron, B
Explanation:
since they're both in group 13 and they forms a 3+ ion
Answers
Answer:
a)40.77N
b)0.11seg
Explanation:
The bullet has a kinetic energy:
When the bullet stops this energy goes to zero, as the energy must be conserved the work done by the head of the superhero must be equal to the original energy of the bullet:
Considering an average constant force, the work can be calculated as:
Solving for F:
The acceleration(on the opposite direction of motion) on the bullet will be:
The velocity of the bullet considering a constant acceleration can be calculate as:
It stops moving when V=0 so:
Answer:
a) 23444.3 N
b) 0.191 ms
Explanation:
Given:
Mass of the bullet m = 7.8 g = 7.8 * 10⁻³ Kg
Initial speed u = 575 m/s
Final speed v = 0
Distance covered s = 5.50 cm = 0.055 m
(a)
According to work energy theorem
Work done W = Change in Kinetic energy
hence, force*distance = 1/2*mass*velocity²
that is, F*S = (1/2)mu²
F*0.055 = 0.5 * 7.8 * 10⁻³ * (575)^2
F = 23444.3 N
(2)
From Impulse definition
force*time = change in momentum
where momentum = mass * velocity
F*t = Change in momentum = m* u
23444.3t = 7.8*10⁻³ * 575
Time, t = 0.191 ms
Answers
Answers
between 2 masses is
F = G M₁ M₂ / R²
G = 6.67 x 10⁻¹¹
M₁ and M₂ = the masses of the two masses
R = the distance between their centers.
When we plug in 3 x 10⁻¹⁰ for the force, and 0.45 for the distance,
we get the product of the 2 objects M₁M₂ = about 0.911 , and
that's as far as we can go without some more information.
The question says that the two masses add up to 4.0 kg.
So now we know that M₁M₂ = about 0.911 and (M₁ + M₂) = 4.0 kg.
With this, we immediately step into a big squishy quadratic equation,
whose solutions are:
one mass = 3.758 kg
the other mass = 0.242 kg .
Answers
Answer:
air speed
Explanation:
took the exam