Answer:
B.
Explanation:
This is because if it has a long half-life then there will be enough rock left to be able to determine the age of the rock. It is not A. because if it has a long half-life there would be part of the substance left to determine the age. It is not C. because in order to study the substance, there must first be a substance left to study.
Hope this helps!
can someone please answer and explain?
its the first one i had the same answer for a test and i got it right
3. When two liquids are mixed and a solid
forms as a reaction, the solid is called a
A. precipitate
participant
c. percipitate
D. polypeptide
And why?
Answer:
D
Explanation:
Question 14 of 25
The image shows devices that convert wind energy into electrical energy.
What is one advantage of using this type of device in place of burning fossil
fuels?
Answer:
Explanation:
B
Answer: B.It uses a renewable resources
Explanation:
Which statement correctly describes plastic?
A. It has a low resistivity and allows charges to move freely.
B. It has a high resistivity and prevents charges from moving freely.
C. It has a high resistivity and allows charges to move freely.
D. It has a low resistivity and prevents charges from moving freely.
Answer:answer is B
Explanation:
HEEEEELLLPPPPPP!!!!!!!!!!! PPPPPPPPPPPLLLEAASSEE!!!
I will give brainliest
Why do the north poles of these two magnets repel each other?
Answer:
The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
types of energy i really need this answer
Answer:
These are the two basic forms of energy. The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.
Explanation:
Please help! I really need it.
I believe the answer is Justine, correct me if I’m wrong.
how do i get a girl to like me
Answer:
FIRST OF ALL get to know her, and DON'T STARE AT HER ALL THE TIME! And then you just let her know that you like her!
Explanation: HOPE THIS HELPS!
Calcular el diámetro que debe tener en el embolo mayor un gato hidráulico, para obtener una fuerza de 3500N. Cuando el embolo menor tiene un diámetro de 16 cm y se le aplica una fuerza de 250N
Responder:
0.6 m
Explicación:
Responder:
0,15 m
Explicación:
Paso uno:
dado
Fuerza F = 250N
diámetro d1- 16 cm am = 0.16 m
A1 = πd1 ^ 2/4 = 3.142 * 0.16 ^ 2/4
= 0.02 m ^ 2
Carga L = 3500N
A2 =?
Segundo paso:
sabemos que la presión aplicada a un extremo para levantar una carga en el otro extremo se expresa matemáticamente como
F1 / A1 = F2 / A
sustituir
250 / 0.2 = 3500 / A
cruzar multiplicar
A2 = 0.02 * 3500/250
A2 = 70.3 / 250
A2 = 0.28
sabemos que área = πd ^ 2/4
0.28 = πd2 ^ 2/4
0.28 = 3.142 * d2 ^ 2/4
0.28 * 4 / 3.142 = d2 ^ 2
0.36 = d ^ 2
d = √0.36
d = 0.6 m
el diámetro debe ser de 0.6 m
A carton of milk contains 128 ounces. Sara’s son drinks 4 ounces of milk at each meal. How many 4-ounce servings will one carton of milk provide? There are _____ servings.
Answer:
32 four ounce servings
Explanation:
if you take the total amount of ounces the carton holds (128 ounces)and divide it by the number of ounces the son consumes per serving(4ounces) you will get the total amount of servings(32servings)
What happens to an object at rest if there is no net force
on the object?
Answer:it will continue in its state of rest.
Explanation:
4. In a closed system consisting of a cannon and a cannonball, the kinetic energy of a cannon is 72,000 J. If the cannonball is 18 kg it has a velocity of 23 m/s when fired from the cannon, what is the total kinetic energy in the system?
A. 72, 207 J
B. 71, 793 J
C. 67, 239 J
D. 76, 761 J
5. In a computational model of the energy loss of a house, if the energy flux increases and the total area insulated increases, what happens to the energy loss of the house?
A. The energy loss must decrease.
B. The energy loss must increase.
C. The energy loss can increase or decrease.
D. The energy loss will neither increase nor decrease.
Answer:
1. The velocity decreases, and the kinetic energy decreases.
2. an increase in temperature difference between the inside and outside of the building
3. The total kinetic energy remains the same.
4. 76,761 J
5. The energy loss must increase.
Explanation:
Send your thanks to sonographer not me, i just wanted him/her to get the thanks they deserve. #PHYSICSSUCKS
kinetic energy and thermal conductivity processes allow the correct answers to the questions are:
4. The answer for the total kinetic energy correct is: D. 17761 J
5. the answer is: C. The energy loss can increase or decrease.
4. Kinetic energy is due to the motion of bodies and is given by the relation
K = ½ m v²
Wher k is de kinetic energy, m the mass and v speed.
Let's look for the kinetic energy of the bullet
K₂ = ½ 18 23²
K₂ = 4761 J
They indicate the kinetic energy of the cannon is K = 72000 J, they ask the energy at total kinetic energy is
[tex]K_{total}[/tex] = K + K₂
K_{total} = 72000 + 4761
K_{total} = 76761 J
When checking the answer, the correct one is
D. 76761 J
5. In modern houses and systems, insulation is created to maintain heat and reduce losses
P =[tex]\frac{A \Delta T}{R}[/tex]
Where P is the heat flux, A the insulated area, ΔT the temperature difference and R the relationship between the thickness of the insulation and its thermal conductivity.
In this case they indicate that the flow increases and the isolated area increases. We have several possibilities
The flow increases faster than the isolated area in this case the heat loss increases The heat flow increases by the same amount as the isolated area, for this the amount of insulation must increase (R), the losses will remain constant. The heat flow increases slower than the insulated area, the losses will decrease.
In this case it indicates that the two increases, therefore the heat requests can increase or decrease
The correct answer is :
C. The energy loss can increase or decrease.
With kinetic energy and thermal conductivity processes we can find the correct answers to the questions that are:
4. The answer for the total kinetic energy correct is: D. 17761 J
5. the answer is: C. The energy loss can increase or decrease.
Learn more here: brainly.com/question/7643131
Which of the following best defines a nonrenewable resource?
A resource that cannot be replenished
A resource that is difficult to recover
A resource that is replenished at a rate slower than it is used
Any resource that exists in finite quantities (there is only a certain amount)
Answer:
I think it's this A resource that is replenished at a rate slower than it is used
Any resource that exists in finite quantities (there is only a certain amount)
Answer:
A resource that is difficult to recover.
If a star is measured to have a parallax angle of 0.5 arcsec, how far away is the star? a. 2 ly b. 2 pc c. 0.5 pc (astronomy)
Answer:
2 pc
Explanation:
The parallax angle is the angle of the earth at different times in a year relative to a given closest star.
P = [tex]\frac{1}{d}[/tex]
where p is the parallax angle, d is the distance between the earth and the star
Since p = 0.5 arcsec, then;
d = [tex]\frac{1}{p}[/tex]
= [tex]\frac{1}{0.5}[/tex]
= 2
d = 2 pc
The star is 2 parsec away from the earth.
Which series of energy transformations takes place in the circuit when the siren turns on? A: Chemical energy > Sound energy > Electrical energy B: Sound energy > Electrical energy > Chemical energy C: Chemical energy > Electrical energy > Sound energy D: Electrical energy > Chemical energy > Sound energy
Answer: The correct option is C ( Chemical energy > Electrical energy > Sound energy)
Explanation:
Energy is defined as the capability or ability to perform work. It is measured in joules. It is a scalar quantity ( that is, fully described by its magnitude).
The principle of conservation of energy states that in a closed system, energy can neither be created nor destroyed during transformation. Although energy can be transformed so that the total energy of a given system always remains constant. The different forms of energy includes:
--> mechanical energy
--> Chemical energy
--> Heat energy
--> sound energy
--> electrical energy
--> sound energy
To be able to create a circuit that will produce siren sounds, a source of power supply will be needed. This would be derived from a battery cell( Chemical energy). This supplies current (electrical energy)to the sound system of the circuit to produce the siren sounds heard(sound energy). Therefore the energy transformation is from CHEMICAL ENERGY to ELECTRICAL ENERGY to SOUND ENERGY.
WILL GIVE BRAINLIEST (c) 3 pts. In order to stop the evil Magneto, Jean Grey needs to fly from
rest on the ground to the top of the Statue of Liberty (46 m) in 2.0
seconds. What is her minimum average acceleration during her
ascent? Assume constant
acceleration for the entire distance and that
she does not decelerate near the top.
Answer:
Acceleration, [tex]a=23\ m/s^2[/tex]
Explanation:
Given that,
The statue of Liberty is at a height of 46 m.
Jean Grey needs to fly from rest on the ground to the top of the Statue of Liberty (46 m) in 2.0 seconds.
We need to find her minimum average acceleration during her ascent. Let it is t. Using the second equation of motion to find it.
[tex]h=ut+\dfrac{1}{2}at^2\\\\h=\dfrac{1}{2}at^2\\\\a=\dfrac{2h}{t^2}\\\\a=\dfrac{2\times 46}{(2)^2}\\\\a=23\ m/s^2[/tex]
So, the constant acceleration is [tex]23\ m/s^2[/tex] for the entire distance.
If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?
A. Acceleration
B. Newton's 2nd law
C. Force
B. Mass
Answer: I think c force
Explanation:
John argues that energy is not conserved because when someone presses the brakes in a moving car, kinetic energy is lost. What should you say to correct John?
SOMEONE PLZ HELP , I HAVE 4 HW DUE TMR BC MY TEACHER JUST GIVE ME A VERY SHORT TIME TO DO THE WORK . 50POINTS
Answer:
4. Violet light has the shortest wavelength of all the colours and the highest frequency. Red has the longest wavelength and the lowest frequency.
5.
a. Radio waves
b. Radio waves
c. Radio waves
d. Radio waves
e. Infrared waves
f. Infrared waves
g. Infrared waves
h. X-ray waves
i. Gamma ray waves (UV)
6. Ultraviolet (UV) radiation
7. Premature aging of the skin and sun damage
(liver spots, keratosis, solar elastosis, etc.)
Hope it helps!
d. Radio waves
e. Infrared waves
g. Infrared waves
h. X-ray waves
i. Gamma ray waves (UV)
6. Ultraviolet (UV) radiation
What is the purpose of life?
Answer:
to live honorable
Explanation:
a.
Study harder than everyone else
c.
Learn faster than other students
b.
Study more often than everyone else
d.
Make studying part of their daily routine
Please select the best answer from the choices provided
A
B
C
D
Answer:
d one
Explanation:
d one frome my site
Answer:
d
Explanation:
d
10. A car starts from rest and travels for 5.0 s with a constant acceleration of -1.5 m/s/s.
A. What is the final velocity of the car?
B. How far does the car travel in this time interval?
Answer:
a.-7.5 m/s
b.18.75 m
Explanation:
hope it helps
An 8-N force is applied to a 2-kg box to accelerate it to the right across a table. The box
encounters a force of friction of 5 N. What is the acceleration of the object?
(1 Point)
4 m/s2
2.5 m/s2
1.5 m/s2
1 m/s2
Answer:
1.5
Explanation:
resultant force=8-5=3N
using f=ma
a=f/m
=3/2
=1.5
Obi Wan Kenobi is force pushing some bad guys into a forcefield. The bad guys (m= 300 kg) were originally at REST 5 meters away from the forcefield. It took them 0.5 seconds to hit the forcefield. How much force does Obi Wan apply?
Answer:
F = 12000 N = 12 KN
Explanation:
First we need to find the acceleration of the bad boys by using second equation of motion:
s = Vi t + (1/2)at²
where,
s = distance covered = 5 m
Vi = Initial Velocity = 0 m/s
t = time taken = 0.5 s
a = acceleration = ?
Therefore,
5 m = (0 m/s)(0.5 s) + (1/2)a(0.5 s)²
a = 2(5 m)/(0.5 s)²
a = 40 m/s²
Now, we calculate the force applied by Newton's Second Law:
F = ma
where,
F = force = ?
m = mass of bad guys = 300 kg
Therefore,
F = (300 kg)(40 m/s²)
F = 12000 N = 12 KN
in which state of matter are the particles closest together?
Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart
Explanation:
Which equation describes the sum of the vectors plotted below?
Answer:
Answer: A. [tex]\vec r = 4\hat x+2\hat y[/tex]
Explanation:
Sum of Vectors
The vectors plotted in the graph are arranged using the head-to-tail method, i.e. placing the tail of the second vector at the head of the first vector. The head of the second vector indicates the sum of both vectors.
From the graph, we can see the head of the second vector lies in the point of coordinates (4,2).
This vector is represented as:
[tex]\vec r = 4\hat x+2\hat y[/tex]
Answer: A. [tex]\mathbf{\vec r = 4\hat x+2\hat y}[/tex]
A car traveling at 100km/hr .how many hours will it take to cover a distance of 750 km
Answer:
7.5 right?
Explanation: if im wrong shoot me
Answer:
7.5 hours( 7 hours 30 minutes)
Explanation:
Speed = distance/time
time = distance/speed
750 km divided by 100 km/hr = 7.5 hours
In each case, three charged particles are fixed in place at the vertices of an equilateral triangle. The triangles are all the same size. Rank the magnitude of the net electric force on the lower-left particle. Greatest ______ _______ _______ _______ Least Explain your reasoning.
Answer:
hello your question is incomplete attached below is the complete question
answer : [tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
Explanation:
The explanation behind the reasoning is attached below
Ranking the magnitude of the net electric force on the lower-left particle from the greatest to the least
[tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
The magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
What is electric force?The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.
The electric force for each case found as;
[tex]\rm F_1 = \frac{2K q^2}{q^2} \\\\ \rm F_2 = \frac{2K q^2}{q^2} \\\\[/tex]
[tex]\rm F_3= 2 m \\\\ \rm \rm F_4= 4\sqrt{3} m\\\\ \rm F_5= 4m[/tex]
Hence the magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
To learn more about the electric force refer to the link;
https://brainly.com/question/1076352
What does the concentration of damaging earthquakes indicate about the underlying rock structure of the area?
Answer:it is unstable and may be fragmented or lie along a fault line
Explanation:
Which of the following examples shows the greatest amount of biodiversity
Question 2 options:
A large amount of salmon swimming upstream
A lake full of a larger variety of fish, frogs, and birds
A densely populated city full of all different kinds of people
An empty field where only grass and insects are living
Answer:
A lake full of a larger variety of fish, frogs, and birds