Answer:
Option B. 32 g
Explanation:
From the question given above, the following data were obtained:
Original amount (N₀) = 128 g
Half-life (t½) = 2.25 billion years
Number of half-lives (n) = 2
Amount remaining (N) =?
The amount of 128 gram of Radium-226 that will remain after 2 half-lives has elapsed can be obtained as followb
N = 1/2ⁿ × N₀
N = 1/2² × 128
N = 1/4 × 128
N = 0.25 × 128
N = 32 g
Therefore, 32g of the sample will remain.
A lens is used to produce a virtual image that is smaller than the object the lens must be a _________ lens.
Question 21 options:
convex
diverging
converging
positive
Answer:
Its a Diverging Lens(concave lens)
Answer:
diverging lens
Explanation:
Balance this equation
_SnO2 +_H2-->_Sn +_H20
Answer:
The balanced chemical equation is 1SnO2 + 2H2 --> 1Sn + 2H2O.
Explanation:
The equation is now balanced because both sides have an equal number of reactants and products.
There is 1 Sn on each side, 2 O on each side, and 4 H on each side.
In what way are networks different from other types of electrical wiring?
Answer:
Networking cables are networking hardware used to connect one network device to other network devices or to connect two or more computers to share printers, scanners etc. Different types of network cables, such as coaxial cable, optical fiber cable, and twisted pair cables, are used depending on the network's physical layer, topology, and size. The devices can be separated by a few meters (e.g. via Ethernet) or nearly unlimited distances (e.g. via the interconnections of the Internet).
There are several technologies used for network connections. Patch cables are used for short distances in offices and wiring closets. Electrical connections using twisted pair or coaxial cable are used within a building. Optical fiber cable is used for long distances or for applications requiring high bandwidth or electrical isolation. Many installations use structured cabling practices to improve reliability and maintainability. In some home and industrial applications power lines are used as network cabling.
Explanation:
Im not sure, so nasa sa inyo if kokopyahin nio
ps: follow me later
calculate the weight of an object that has a mass of 100 kg on earth
Answer:
W = 980 N
Explanation:
Weight = Mass x Gravity
Weight = (100kg) x (9.8[tex]\frac{m}{s^2}[/tex])
Weight = 980 N
As you move from left to right across the electromagnetic spectrum in the image, the wavelength becomes?
A.) Longer
B.) Lower
C.) Shorter
D.) Taller
Answer:
It is A.) Longer
Explanation:
The shortest wavelength is on the (high energy)left side of the diagram with gamma rays. The longest wavelength waves are radio, around 3 meters. so, as you progress, the wavelengths get longer.
A diver is on a board 1.80 m above
the water. She jumps straight up
at 3.62 m/s.
What is her maximum height above
the water?
[?]m
Answer:
2.47
Explanation:
La contaminación acústica de acuerdo a la organización mundial de la salud medido en decibeles corresponde
Answer: Si es mayor a 65 dB es considerado dañino.
Explanation: Se considera ruido a todo aquel que supera los 75 dB o torturante aquel mayor a 120 dB según la OMS.
The diagram shows a compressed spring between two carts initially at rest on a horizontal frictionless surface. Cart A has a
mass of 2 kilograms and cart B has a mass of 1 kilogram. A
string holds the carts together. After the string is cut and the
two carts move apart, the magnitude of which quantity is the same for both carts?
O inertia
O momentum
O velocity
O kinetic energy
A.2 kg
В.1 kg
Answer:
momentum
Explanation:
the impulse is equal for both carts, the momentum for both carts is zero both before the string is cut and after it is cut
After the string is cut and the carts move apart, the magnitude of momentum is the same for both carts. Hence, option B is correct.
What is Momentum?Momentum is the result of a molecule's mass and velocity. Being a vector quantity, momentum possesses both magnitude and the direction. As according to Isaac Newton's second equation of motion, the force applied on a particle is equivalent to the time change in velocity.
According to Newton's 2nd law, if a particle is exposed to a constant force for a specific period of time, the result of the force and time (referred to as the impulse) is equal to the difference in momentum. In contrast, hand, a particle's momentum is a measurement of the amount of time needed for a consistent force to put it to rest.
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kinetic energy what is formula
What is the magnitude of the resultant of two forces 20 Newton and 15 Newton at 90 degrees to each other
Answer:
the magnitude of the resultant of two forces is 25 N.
Explanation:
Given;
first force, F₁ = 20 N
second force, F₂ = 15 N
the angle between the two forces, θ = 90⁰
The resultant of these two forces is obtained by applying Pythagoras theorem;
R² = F₁² + F²
Where;
R is the resultant force
R² = 20² + 15²
R² = 625
R = √625
R = 25 N
Therefore, the magnitude of the resultant of two forces is 25 N.
whats going on here ??
What role does speed play in team sports like football, hockey, and soccer?
a) It increases a team member’s ability to maintain momentum throughout a game.
b) It helps the team share their abilities more evenly throughout the game.
c) It helps a team member reach the ball or goal before other players.
d) It allows a team’s players to throw the ball harder than the other team’s players.
Answer: A) It increases a team member’s ability to maintain momentum throughout a game.
Explanation: Team members from sports like football, hockey and soccer need to focus on their momentum because it helps maintain the team member's speed while catching, throwing, or kicking the ball at the right time and moment.
Help please (20 pts) I think it's C
What does "think of concrete examples" mean?
A. It means you come up with as many examples as you can in five minutes.
B. It means your thinking is getting too stiff, like concrete.
C. It means you think about how you can imagine the problem as a concrete block.
D. It means think of a real-life example you can relate to that has to do with what you’re learning.
Answer:
I'm not sure it is c I'm sure it is d
If the mass of an object on earth is 18 grams, what would the mass of the same object be in the Moon
Answer:
18 grams
Explanation:
The mass of an object is the object's fundamental property. It is the amount or quantity of mater in the object. Irrespective of the object's location or the gravitational force applied on the object, the mass of an object remains the same. In other words, the mass of an object is the same everywhere.
The mass should however not be confused with its weight which depends on the mass and the gravitational force applied on it.
In summary, whether on earth or in the moon, the mass of an object remains the same. If the mass of the object is 18 grams on earth, it will also be 18 grams in the moon.
The sparkle of a diamond is an effect of...
Answer:
As the light moves through the diamond,it is scattered and fractured,creating the sparkle of diamonds are known for . This is the refraction.
What is SI unit of pressure?
Answer:
pascal (Pa)
Explanation:
hope this helps!!! :D
pls mark brainliest!!
When beavers inhabit an area, they cut down trees and construct beaver dams, which slow the flow of rivers or streams. Which of the following variables is NOT going to change as a result of the long-term presence of beavers in an area?
F. the number of tree species in the area
G. the types of fish present in the river or stream
H. the amount of rainfall received in summer months
I. the amount of sunlight that reaches the forest floor
Answer: H
Explanation:
When beavers dam a stream they slow the movement of water. Behind the beaver dam, a pond of still water is formed. This pond is then colonized by animals and plants that typically live in lakes rather than streams.
How did adding mushrooms affect trees?
can someone please help me answer these questions
Answer:
the First one i think is D: it increases
The second i think it is B
i think
Explanation:
A block of mass m = 3.7 kg slides from left to right across a frictionless surface withra speed v; - 7.4 m/s. It collides in a perfectly elastic collision with a second block of
mass M that is at rest. After the collision, the 3.7-kg block reverses direction, and its new speed is vf 2.2 m/s. What is M?
8.9 kg
6.8 kg
5.2 kg
7.5 kg
Answer:
5.2 kgExplanation:
#CARRY ON LEARNING #MARK BRAINLITSWhat most likely causes water to change from the liquid state to a gas in the water cycle?
A. energy from gravity
B. energy from the Sun
C. energy from moving water
D. energy from the Earth's core
[tex] \huge \mathcal{Answer࿐}[/tex]
The factor which is responsible for the conversion of water in liquid state into gaseous state in the water cycle is :
[tex] \mathrm{\hookrightarrow Energy\:\: from \:\: Sun} [/tex]
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
A converging lens makes a parallel beam of light from a distant object to
O to become invisible
to be visible with different colors
O come together to focus at a single point
come apart from a single point of focus
Un auto alcanza una velocidad de 54km/hrs, en 10 segundos al partir de reposo ¿Cuál fue su aceleración?
Answer: [tex]1.5\ m/s^2[/tex]
Explanation:
Given
velocidad [tex]v=54\ km/h[/tex]
tiempo tomado [tex]t=10\ s[/tex]
Convertir km/h en m/s
[tex]\Rightarrow 54\ km/h\equiv 15\ m/s[/tex]
La aceleración está dada por la tasa de cambio de velocidad
[tex]\Rightarrow a=\dfrac{v}{t}\\\\\Rightarrow a=\dfrac{15}{10}\\\\\Rightarrow a=1.5\ m/s^2[/tex]
Por tanto, la aceleración es [tex]1.5\ m/s^2[/tex]
Can anyone answer this science question NO LINKS !!!!
Answer:
it is certainly a as clearly a has the greater mass
what is the definition of gravity in simple terms?
Answer:
Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects
1 : A force of attraction that tends to draw particles or bodies together.
2 : The attraction of bodies by the force of gravity toward the center of the earth.
3 : Great seriousness.
Is there a way to approximate the distance from a black hole's singularity to it's event horizon ? If so, what formula is used to determine this distance?
Answer:
I suck d hun ok?
I don't know
) Potential difference is the difference in electrical potential between two points. Which term can also be used to describe potential difference?
Answer:
It is also called voltage.
Explanation:
Voltage in a circuits can be define as difference between two points that enable it to push a charge or current in a conducting loop there by causing light. This can also be defined as the workdone that is required per unit of charge or current to cause a motion of a test charge between the two points.
16.
The laws of physics state that energy _____.
cannot be destroyed
can be created
originates as heat
is electrical
Answer:
Conserved
Explanation:
I think, hope it helps:))
Answer: It cannot be destroyed
Explanation: The law of conservation of energy states that energy may not be created or destroyed.
Marvin lifts a box over his head. The work done on the box is- -Negative work -No work -Positive work
Answer:
Positive work
Explanation:
When work and the exerted force are in the same direction, then the work done is positive.
In the question, we understand that Marvin lifts a box up (i.e. over his head). The force to lift the box acts in the upward direction and the work done itself is also in the upward direction (from the floor to Marvin's head).
Since these two are in the same direction, then we can conclude that the work done is positive.
Which best describes a saturated solution?
A
Additional solvent is able to be dissolved in the solute.
B
Additional solute is able to be dissolved in the solvent.
С
The maximum amount of solvent is dissolved in the solute.
D
The maximum amount of solute is dissolved in the solvent.
The maximum amount of solute is dissolved in the solvent. The correct option is D.
What is a saturated solution?A saturated solution is a type of solution where the maximum amount of solute has been dissolved in a solvent, at a specific temperature and pressure, such that any additional solute added will not dissolve.
A saturated solution is a solution in which the maximum amount of solute has been dissolved in the solvent at a specific temperature and pressure. Any additional solute added to the solution will not dissolve and will instead settle at the bottom of the container as solid particles.
The concentration of a saturated solution is at its maximum level and cannot be increased further unless the temperature or pressure is changed.
Therefore, the correct option is D.
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