Answer:
Radioactive decay: is the process by which an unstable atomic nucleus loses energy by radiation.
Half-life: in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive material to decrease by one-half.
Radiometric dating: is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
A force of 12 N is applied to a ball which has a mass of 6 kg. What is the acceleration of the ball?
Answer:
The acceleration of the bowling ball is
1.875 m/s2
energy flows from the sun to _______ to consumers and eventually to _______
a. animals, plants
b. omnivores, plants
c. producers, detrivores
d. plants, animals
Answer:
the answer is c. producers, detrivores
A bicycle possesses 1000 units of momentum. What would be the bicycle's momentun if,it's velocity is doubled?
Explanation:
p = mv ---> let v --> 2v (velocity is doubled) then
p' = m(2v)
= 2(mv)
= 2p
so the momentum also doubled
What is a scientific theory?
O Alaw that is always true
O A hypothesis about nature
O An educated guess based on observations
O An explanation of how the natural world works
Answer: An educated guess based on observations
Explanation: A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.
Hope This Helps!
Pls Mark Me brainliest
-ur gurl Lizzie
8. When a plate cracks, the crack is called a
These faults can store
just like a spring. When
this Is released, you get an
Answer:
an earthquake
Explanation:
the energy is being released
please help me
I’m taking a test and I don’t understand this at all
Answer:
4 CM
Explanation:
The dotted car means thats were it started, the car to the right is were it stops. count the lines from the start of the dotted car to the start of the shaded car. hope that helped!
Heat from a fire is transferred as the air warmed by the fire rises. Which type
of heat transfer is occurring?
A. Refraction
O B. Covection
O C. Conduction
D. Radiation
the volume of the container was 2.5 L at a temperature of 350K. At what temperature will the volume of the container be double its initial value, knowing that pressure remains constant ? (Find the temperature in Celsius ) Show your work below.
Answer:
Explanation:
Given the following data;
Initial volume = 2.5 L
Initial temperature = 350 K
Final volume = 2V1 = 2*2.5 = 5 L
To find the final temperature, we would use Charles law;
i’ll give brainliest!! please help and answer correctly! plsss answer quick
Answer: The motion of the object will remain the same
Explanation:
explain why water buckets are narrow at the base and wider at the top
Answer:
This is to optimize storage and transport.
Explanation:
A racer covers one lap of a 1200 meter track at a speed of 27 meters per second. How long does it take to ride one lap?
Answer:
44.44 seconds
Explanation:
You just do 1200/27
When a 0.400 A current flows
across a resistor, the voltage drops
by 42.0 V. What is the resistance?
(Unit = Ohm)
Answer:
105
Explanation:
Trust brother
22) Net force is the total of all forces acting on an object. When a force is balanced and the object does not move, the net force is equal to what: A) 0 B) 10 C) 100 D) The weight of the object
Answer:
A) but be sure and read the answer.
Explanation:
If the object does not move at all, (that's an important restriction) the net force = 0. That being so, the acceleration must be 0 as well. But there is no law saying that there cannot be a constant motion and that's why the restriction is important.
If you are on offense but do not have the ball, what should you be doing?
Answer:
try to stay open, dont just stand there, u gotta keep moving around. maybe set a screen for ur teamate so they can get to the basket quickly, but regardless, stay open and stay moving
Explanation:
u talking about basketball right?
Which statement correctly describes magnetic field lines around a bar magnet?
Answer:A
Explanation:I believe the correct answer would be they join north pole to south pole. The direction of these lines always goes from the direction of north to south pole. These lines forms loops in order to favor the way which requires or has less resistance.
They point away from the north pole and towards the south pole, is the statement correctly describing magnetic field lines around a bar magnet.
What is a bar magnet?A bar magnet is a rectangular section of an item that has permanent magnetic qualities and is made of iron, steel, or any other ferromagnetic material or ferromagnetic composite.
It has two poles, one north, and one south, and when hanging freely, the magnet aligns itself such that the north pole faces the earth's magnetic north pole.
They point away from the north pole and towards the south pole, the statement correctly describes magnetic field lines around a bar magnet.
Hence statement B correctly describes magnetic field lines around a bar magnet.
To learn more about the bar magnet refer to the link;
https://brainly.com/question/708941
A 80 kg person buys a scale at a mall that reads weight in Newtons and can’t wait to try it out, so they open the scale on an elevator. What would the scale read if the elevator was moving upward at 6.2 m/s2?
Answer:
The scale read 1280 N.
Explanation:
Given that,
The mass of a person, m = 80 kg
We need to find the scale reading when the elevator is moving upward at 6.2 m/s².
We know that, when an elevator moves up, the reading on the scale is given by :
N-mg=ma
N=m(a+g)
Put all the values,
N = 80(6.2+9.8)
= 80(16)
= 1280 N
Hence, the scale read 1280 N.
Deanna stirred a teaspoon of sugar into a glass of warm water. The sugar completely dissolved in the water. Select 3 statements below that are TRUE about the dissolved sugar.
A) The sugar chemically combines with the water to form a new substance
B) The sugar can be separated from the water
C) The sugar molecules are spread out amongst the water molecules
D) The sugar turns into water molecules
E) The sugar melts
F) The sugar and water form a mixture
G) The sugar loses mass
H) The sugar breaks down into the individual atoms that make up sugar
I) The sugar disappears and no longer exists
Please don't give me links for the answers or random words bc i will report u and u will lose points!
Answer:
B, C, F
Explanation:
B: Sugar can be separated from the water by evaporating the water. This will leave large chunks of sugar.
C: Sugar gets spread out among the water.
F: Sugar water is a homogeneous mixture. Can't see the individual components because of the dissolving.
Hoped this helped! :)
Please help. Will give Brainlist.
Answer:
No and yes it's like a 30%or 20%
Explanation:
"researchers say that there is no proof that dimples are inherited."
meaning that if the mom or dad had dimples it might have a chance or no since a dominant trait not a recessive trait
The graph represents the reaction 2H20 + 02->2H2O2 as it reaches
equilibrium. Based on the graph, which two statements about this réaction
are true?
Answer:
At point 3, the reactants and products reach their equilibrium concentrations.
At point 1 the reaction proceeds mostly in the forward direction.
Explanation:
RUE or FALSE: Red hair and freckles is a helpful (good) mutation.
Three objects, carrying charges of 4.0 x 10^6 C, 6.0 x 10^6 C, and +9.0 x 10^6 C, respectively, are placed in a line, equally spaced from left to right by a distance of 0.50m. Calculate the magnitude and direction of the net force acting on each charge that results from the presence of the other two
Answer:
[tex]F_1=540*10^{-12} N[/tex]
[tex]F_2=-1080 * 10^{-12} N[/tex]
[tex]F_3=-2268 * 10^{-12} N[/tex]
Explanation:
From the question we are told that
Charge on objects
[tex]Q_1=4.0 * 10^6 C[/tex]
[tex]Q_2= 6.0 * 10^6 C[/tex]
[tex]Q_3= +9.0 * 10^6 C[/tex]
Distance apart [tex]d=0.50m[/tex]
Generally the equation for Force on individual Charge is mathematically given by
For Q_1
[tex]F_1=\frac{d*Q_1Q_2}{r^2}+\frac{ d*Q_1Q_3}{4r^2}[/tex]
[tex]F_1=\frac{k*(4.0 * 10^6 C)(6.0 * 10^6 C)}{0.5^2}+\frac{ d*(4.0 * 10^6 C)( +9.0 * 10^6 C)}{4(0.5)^2}[/tex]
[tex]F_1=540*10^{-12}[/tex]
For Q_2
[tex]F_2= \frac{k}{0.5^2[Q_1 + Q_3]Q_2}[/tex]
[tex]F_2= \frac{k}{0.5^2[4.0 * 10^6 C + 9.0 * 10^6 ]*6.0 * 10^6 C}[/tex]
[tex]F_2=-1080 * 10^{-12} N[/tex]
For Q_3
[tex]F_3=\frac{kQ_3}{r^2[Q_1/4+Q_2}[/tex]
[tex]F_3=\frac{k(+9.0 x 10^6 C)}{(0.5)^2[(4.0 x 10^6 )/4+(6.0 x 10^6 C)}[/tex]
[tex]F_3=-2268 * 10^{-12} N[/tex]
pls help me !!! <3333
Answer:
1. Is a different pitch, has a different speed
2. is brighter or dimmer, has a different energy
Explanation:
Does the law of attraction actually have a basis in physics?
That is correct
There is not answer choices but I think its true
Are you good with compare and contrasting?
If so, look at my recent question please
For each 1 degree Celsius that temperature incileases, the speed of
sound ___ by 0.6 m/s.
Answer:
A: For each 1 degree Celsius that temperature decreases, the speed of sound decreases by 0.6 m/s. So sound travels through dry, -20 °C air at a speed of 319 m/s
Explanation:
When rutherford bombarded thin gold foil with a-particles,he found that some a-particles were deflected through large angles. Which statement explains this deflection?
Answer:
the nucleus of the atom you have conserved almost all its mass in a very small volume
Explanation:
In Rutherforf's experiment, most alpha particles had few deflections, eg a few of them were deflected at small angles, a much smaller number deflected at large angles, and very few were deflected.
The explanation that I found for this is that if all the mass and the positive charge of the atom is in a small volume, they could specifically calculate this the relationship of the volumes,
V_atom / V_nucleo = 10⁴
Therefore, the phrase that explains the observing phenomenon is that the nucleus of the atom has concentrated almost all its mass, very small emolument and in that same volume is all the positive charge of the atoms.
In summary, the phrase that describes the process is:
the nucleus of the atom you have conserved almost all its mass in a very small volume
a group of engineers have launched a space probe from earth that will land on the surface of Mars. how will the force of gravity from mars affect the space probe?
A) the force of gravity from Mars will not pull on the space probe until it reaches the planets surface.
B) the force of gravity from Mars will stop pulling on the space probe when it reaches the planet
C) the force of gravity from Mars will pull more strongly on the space probe as it gets closer to Mars.
D) the force of gravity from Mars will pull on the space probe the same amount no matter how far away it is
Answer:D
Explanation:
The force of gravity from Mars will pull on the space probe the same amount no matter how far away it is, so option D is correct.
What is gravity?All material objects in the universe are subject to the force of gravity, also known as gravitation. The force of gravity tends to draw any two non-zero mass objects or particles toward one another. Subatomic particles and galaxy clusters are both affected by gravity, as are objects of all sizes.
Due to the law of gravity, or gravitation, which draws all objects with mass in its vicinity toward it, Mars' gravitation is a natural occurrence. Due to the planet's lesser mass, its gravity is weaker than that of Earth. On Mars, the gravitational acceleration fluctuates, but on average it is 3.72076 m/ s² (or around 38% of Earth's).
Therefore, the force of gravity from Mars will pull on the space probe the same amount no matter how far away it is.
To know more about gravity:
https://brainly.com/question/9722860
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1200 W, 2000 W, and 720 W devices will be operated on 220 V at the same time. Calculate the current through each device.
Answer:
I₁ = 5.45 A
I₂ = 9.1 A
I₃ = 3.27 A
Explanation:
Electrical power is defined as the product of current and displacement.
[tex]P = VI\\\\I = \frac{P}{V}[/tex]
where,
P = Power of Device
I = current passing through the device
V = voltage across the device = 220 V
FOR P₁ = 1200 W
[tex]I_1 = \frac{1200\ W}{220\ V}[/tex]
I₁ = 5.45 A
FOR P₂ = 2000 W
[tex]I_2 = \frac{2000\ W}{220\ V}[/tex]
I₂ = 9.1 A
FOR P₃ = 720 W
[tex]I_1 = \frac{720\ W}{220\ V}[/tex]
I₃ = 3.27 A
Un muelle se alarga 30 centímetros cuando ejercemos sobre el una fuerza de 24 N a) calcula el valor de la constante elástica del muelle b) calcula el alargamiento del muelle al aplicar una fuerza de 60 N
Answer:
(a) k = 80 N/m (b) x = 75 cm
Explanation:
The question says that, "A spring is elongated 30 centimeters when we exert a force of 24 N on it a) calculate the value of the spring constant b) calculate the elongation of the spring when applying a force of 60 N"
Given that,
Force exerted on the spring, F = 24 N
Elongation in the spring, k = 30 cm =0.3 m
(a) We know that, the force on the spring is given by :
F = kx
Where
k is spring constant
So,
[tex]k=\dfrac{F}{x}\\\\k=\dfrac{24}{0.3}\\\\k=80\ N/m[/tex]
(b) When F = 60 N,
[tex]x=\dfrac{F}{k}\\\\x=\dfrac{60}{80}\\\\x=0.75\ m\\\\x=75\ cm[/tex]
Hence, this is the required solution.
Two resistors, R1 and R2, are
connected in parallel. R1 = 35.0
ohms, and the equivalent resistance
of the combination is 14.5 ohms.
What is the value of R2?
(Unit = ohm)
Answer:
The value of R₂ is equal to 24.75 ohms.
Explanation:
Given that,
Two resistors, R₁ and R₂, are connected in parallel.
The equivalent resistance is 14.5 ohms
We need to find the value of R₂.
When two resistors are connected in parallel. The equivalent resistance is given by :
[tex]\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{14.5}=\dfrac{1}{35}+\dfrac{1}{R_2}\\\\\dfrac{1}{R_2}=\dfrac{1}{14.5}-\dfrac{1}{35}\\\\\dfrac{1}{R_2}=0.04039\\\\R_2=\dfrac{1}{0.04039}\\\\R_2=24.75\ \Omega[/tex]
So, the value of R₂ is equal to 24.75 ohms.
how are speed and distance similar?
Answer:
When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance traveled and time taken: Speed is distance divided by the time taken.
Explanation:
Thats what goog.le said so if its wrong blame G O O G L E