Answer:
1/8
Explanation:
17,100 years is 3 times the half-life of 5,700 years. After each half-life, half remains, so the amount remaining after 3 half-lives is ...
(1/2)(1/2)(1/2) = 1/8
1/8 of the sample remains after 17,100 years.
Answer:
1/8
Explanation:
I need help this is extremely hard
Answer:
For the first one shown, the answer is Directly Proportional, The second one is Inversly Proportional, and the last is fourtl times the original value
El carrusel de la feria del pueblo tiene una velocidad de 2 rpm. En un determinado instante se corta la corriente y como consecuencia del rozamiento, aparece una aceleración de frenado de 0,05 rad/s2.
Answer:
t = 4.19 s, θ = 0.437 rad
Explanation:
This is an exercise in rotational kinematics in this case we indicate the angular velocity and the angular acceleration, asking for the time and the angle it takes to stop.
w = w₀ + α t
w² = w₀² + 2 α θ
when the system stops the angular velocity is zero
0 = w₀- α t
0 = w₀² - 2 α θ
t = w₀ / α
tea = w₀² / 2 α
let's reduce the magnitudes to the SI system
w₀ = 2 rpm (2π rad / 1 rev) (1 min / 60s) = 0.209 rad / s
let's calculate
t = 0.209 / 0.05
t = 4.19 s
θ = 0.209 2/2 0.05
θ = 0.437 rad
A certain reptile species is an herbivore and exists only on an isolated island. Which of the following would most likely result in the extinction of the reptile species over a period of twenty thousand years?
The reptile species produces many offspring with many unique traits, and the vegetation remains constant
The reptile species produces many offspring with some unique traits, and the vegetation remains constant
The reptile species produces few offspring with no unique traits, and the vegetation changes quickly
The reptile species produces many offspring with some unique traits, and the vegetation changes slowly
Answer:
A
Explanation:
Answer:
The answer is D
Explanation:
I took he test and got it correct.
Big sound is heard in bathroom than in a living room
Answer
That doesn't make any sense.
Explanation:
Kinetic energy increases as:
A. Mass increases and velocity decreases.
B. Mass decreases and velocity increases.
C. Both mass and velocity increase.
D. Both mass and velocity decrease.
Kinetic energy formula is: 1/2 mv^2
M = mass
V = Velocity
So as kinetic energy increases, mass increases and velocity increases because mass and velocity are directly proportional to each other.
A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat. Which force would most likely allow the tugboat to move the barge into the harbor? –4500 N –2500 N 2500 N 4500 N
Answer:
the correct one is F’= 4500 N
Explanation:
To solve this problem we must use Newton's second law
where F₁ is the force of the barge F₁ = 3000N and the force of the tugboat is F '
F '- F₁ = m a
we substitute
F '- 3000 = m a
the mass is always a positive quantity, therefore if we want the tug to pull the barge
F ’-3000> 0
when you check it, you respect the correct one is F’= 4500 N
Answer:
The answer is -4500 N
Explanation:
I just got it right on the test
A sledgehammer is an example of what kind of simple machine?
A. Wheel and axle
o
B. Screw
c
C. Wedge
D. Lever
SUS
I am 95 percent sure the answer in C
Answer: C
Explanation:
Which celestial objects come in direct contact with earth
Answer:
Sun
Explanation:
Any asteroid in space is a celestial body. Classification of Celestial Bodies. A star is a form of a celestial object made up of a shining spheroid of plasma held together by its own gravity. The nearby star to Earth is the Sun.
Calculate the wavelength of a water wave with a speed of 3.0 m/s and frequency of
4.0 Hz.
Answer:
the answer is 12.0
The wavelength of the water wave is 0.75 meters.
What is wavelength?Wavelength is the distance between successive peaks or troughs of a wave. It is denoted by the symbol λ (lambda) and is measured in meters (m) or other units of length.
The wavelength of a wave determines its properties such as its energy, frequency, and speed. In general, waves with longer wavelengths have lower frequencies and travel at slower speeds, while waves with shorter wavelengths have higher frequencies and travel at faster speeds.
Here in the Question,
The relationship between the wavelength (λ), frequency (f), and wave speed (v) of a wave is given by the equation:
v = λf
We are given the speed of the water wave (v) as 3.0 m/s and the frequency (f) as 4.0 Hz.
Plugging these values into the equation, we get:
3.0 m/s = λ x 4.0 Hz
Rearranging the equation to solve for the wavelength, we get:
λ = v/f = 3.0 m/s ÷ 4.0 Hz = 0.75 m
λ = 0.75 m
Therefore, the wavelength of the water wave is 0.75 meters.
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What is density? Write a formula by showing the relation of mass density and volume
Answer: below
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume
Answer:
Density is defined as the amount of matter contained in unit volume of body
PLEASE HELPPPPP!!!!!!!!!
how do you find the net force of 225 N
Answer:
2.65
Explanation:
Its simple just find the newtons
Meg has two glasses of grape juice. Glass A has 80 grams of juice at 30 °C. Glass B has 80 grams of juice at 50 °C.
Which of the following steps will make the kinetic energy of the molecules of the juice in both glasses equal?
Decrease the temperature of juice in Glass A by 20 °C
Increase the temperature of juice in Glass A by 20 °C
Decrease the temperature of juice in Glass B by 30 °C
Increase the temperature of juice in Glass B by 30 °C
Answer:
Increase the temperature of juice in Glass A by 20 °C
Answer:
lil baby
Explanation:
5.0 kg, with a bullet of mass 0.1 kg. The target was mounted on
low-friction wheels and as the bullet struck the target, the target with
bullet embedded bullet sped off with a velocity of 6.0 ms.
Calculate the velocity of the bullet just before it hit the stationary
target.
Answer:
306 m/s
Explanation:
Law of conservation of momentum
m1v1 + m2v2 = (m1+m2)vf
m1 is the bullet's mass so it is 0.1 kg
v1 is what we're trying to solve
m2 is the target's mass so it is 5.0 kg
v2 is the targets velocity, and since it was stationary, its velocity is zero
vf is the velocity after the target is struck by the bullet, so it is 6.0 m/s
plugging in, we get
(0.1 kg)(v1) + (5.0 kg)(0 m/s) = (0.1 kg + 5.0 kg)(6.0 m/s)
(0.1)(v1) + 0 = 30.6
(0.1)(v1) = 30.6
v1 = 306 m/s
The initial velocity of the bullet can be determined from the total momentum of the system. The velocity of the bullet was 306 m/s.
What is momentum ?Momentum of a body is the product of its mass and velocity. For a collision, the momentum before and after collision will be the same for the colliding system.
Let m1 and m2 be the masses and u be the initial velocity and v is the final velocity.
then, m1 u1 + m2 u2 = m1 v1 + m2 v2.
Given m1 = 5 kg
m2 = 0.1 kg
The velocity of the combined mass v = 6 m/s.
The momentum of the target is zero since it was stationary.
(0.1 × u1) = (0.1 + 5)6 m/s
(0.1 × u1) = 30.6 m/s
then u1 = 30.6/0.1 = 306 m/s
Therefore, the velocity of the bullet before hitting was 306 m/s.
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Why is it important that a finger be wet
before it is touched to a hot clothes iron?
Why is it important that your finger be wet if you intend to touch it briefly to a hot clothes iron to test its temperature. If your finger is wet, some of the heat transmitted to your finger will be given to the water which has a high specific heat capacity and also a larger latent heat of vaporization.
#carryonlearning
please help me answer this
Answer:
A is the correct answer
Hope it helps
The velocity of a car increases from 10 km/h to 50 km/h in 5 seconds. What is its acceleration?
Answer:
2.22m/s^2
Explanation:
1 2 3 4 5 6 7 8 9 10
TIME REMAINING
09:57:20
A scientist discovers a deep bowl-like divot under the ocean off the coast of eastern Mexico that is many kilometers across. The layers of the ground all around the continent from around the time that structure formed contain large amounts of iridium and a larger number of fossils than is normally found. What most likely caused the bowl-like structure?
a meteorite impact
an asteroid impact
an iridium spike
a Kuiper object impact
Mark this and return
Answer:
answer is an ASTEROID
Explanation:
Iridium is a material that forms at very high temperatures, which is why its presence shows that in the impact zone the temperature rose a lot, so we can imagine that the impact was by a body traveling at high speed, which is consistent with a body that comes from space.
An asteroid is a celestial body of some size that when entering the atmosphere heats up and collides with the Earth, leaving a crater that in general is much larger than the diameter of the object.
A meteorite is a small fraction of an asteroid that has been separated by the pressure of the sun, the attraction of the Earth, Moon or another massive body or a combination of these effects, in general, meteorites are small and when they enter the atmosphere They are consumed by heat and very few reach the surface of the Earth, those that do reach are very small.
Therefore due to the size of the crater and the existence of many dead animals around the body must have been very heavy, so the correct answer is an ASTEROID
Answer:
B) An asteroid impact
Explanation:
Help me please
There’s 2 questions.
Answer:
50 Joules of work on the system Total distance is 1m W= F ×D 50 Joules = F × 1m F= 50 Newtons W= 1234 J D= 451234= F × 45 meters F= 27.42 Newtons I do exams and quizzes if ur interestedA coin is dropped off of a building landing on its side. It hits with a pressure of 400/2 It hits with a force of 0.1 Calculate the area of the coin?
Complete Question:
A coin is dropped off of a building landing on its side. It hits with a pressure of 400 N/m². It hits with a force of 0.1N. Calculate the area of the coin?
Answer:
Area = 0.00025 m²
Explanation:
Given the following data;
Pressure = 400N/m²
Force = 0.1N
To find the area of the coin;
Pressure = Force/area
Area = Force/pressure
Substituting into the equation, we have;
Area = 0.1/400
Area = 0.00025 m²
which of the following correctly describes the hierarchy of genetic material within a cell
Answer: D- Each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA
Explanation:
A macromolecule is a large molecule that is made of many smaller units. Chromosomes are macromolecules that contain all of the genetic information in a cell. Chromosomes are each made of two smaller units called chromatids. Chromatids are each made up of molecules of DNA. Therefore, the correct description of the hierarchy of genetic material in a cell is that each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA. The structures become more and more microscopic as one moves down the hierarchy.
I only have 3 minutes left this is my last question
Can someone help me with these questions pls
When we say the energy in a system remains "constant" what we really
mean is...
1 point
the total amount of energy goes up
the total amount of energy remains the same
the total amount of energy goes down
the speed remains the same
of the following is NOT a form of energy?
The total amount of energy remains the same.
is solar system a natural system or human-made system
Answer:
Natural
Explanation:
Answer:
It's a Natural System
Explanation:
When the Solar System was formed Human didn't even exist. the planets clashed and a lot of changes happened to create earth and different planets.
According to Einstein, space and time are _____
dimensions. Masses in the universe _____
and are parts of a whole universe that has four
space-time, and the resulting shape of space-time causes _____ .
Answer:
Relative; curved; gravity.
Explanation:
According to Einstein, space and time are relative and are parts of a whole universe that has four dimensions. Masses in the universe curved space-time, and the resulting shape of space-time cause gravity.
The above theory is known as the General Relativity or General Theory of Relativity and it was published in 1915 by Albert Einstein.
Basically, it states that universe curved space-time is directly proportional to the energy and momentum of matter and radiation that is present. Thus, gravity is the universe curved space-time caused by massive objects.
Answer:
Complete the passage to describe one of the features of Einstein’s general theory of relativity.
According to Einstein, space and time are
relative
and are parts of a whole universe that has four dimensions. Masses in the universe
curve
space-time, and the resulting shape of space-time causes
gravity
correct on Edge2021
Find the velocity of a runner who has a mass of 75 kg and 3,700 Joules of energy.
Answer:
125 joules
Explanation:
The velocity of the runner having a mass of 75 kg will be 9.93 m/s.
What is Kinetic energy of the body?
The energy of the body by virtue of its motion is called its kinetic energy.
Given is velocity of a runner who has a mass of 75 kg and 3,700 Joules of energy.
The kinetic energy of the body is given by the following formula -
KE = 1/2 mv².
Substituting the values -
3700 = 1/2 x 75 x v²
7400 = 75 x v²
v² = 7400/75
v² = 98.66
v = 9.93 m/s
Therefore, the velocity of the runner having a mass of 75 kg will be 9.93 m/s.
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I can't understand
like which energy changes are involved
which energy it was first and which it was converted into
Answer:
turtle
Explanation:
+
1. Energy due to motion is
_______ energy
Answer:
Kinetic energy
Explanation:
The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.
Kinetic energy. For example, a walking person.
A train travels 100 km east and then 75 km west. What is the magnitude of
its displacement?
Answer:
displacement = 100 - 75 = 25 km east
