Explanation:
Because they evolved rapidly, and moulted like other arthropods,trilobites serve as excellent index fossils, enabling geologists to date the age of the rock in which they are found
2.0 L of a gas is heated from 20.0°C to 80.0°C at constant pressure. What is the new volume?
Answer:
The new volume will be = 2.41L
Explanation:
V1 = 2L
V2 = ?
T1 = 20⁰C = 293K
T2 = 80⁰C = 353K
From Charles law V is directly proportional to T
V1/V2 = T1/T2
V2 = (V1×T2)÷T1
just make substitution yourself
Among the bodies in our solar system are asteroids, moons, planets and the Sun. Which statement least supports the theory that gravity helped form our solar system?
A.The Sun consists primarily of gases.
B.Many objects in space are spherical in shape.
C.Planets revolve around an object of greater mass.
D.Planets form by small masses combining into larger masses.
Answer:
A
Explanation:
Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. ... Small particles drew together, bound by the force of gravity, into larger particles.
The Sun consists primarily of gases least supports the theory that gravity helped form our solar system.
What is the Solar System?The Solar System can be defined as the gravitationally bound system of the Sun and the objects that orbit it. Our solar system is formed 4.6 billion years ago from the gravitational collapse of a giant molecular cloud. The vast majority of the mass is in the Sun, with most of the rest mass contained in the planet Jupiter.
The four giant planets of the solar system are substantially larger and extremely massive than the terrestrials planets. Jupiter and Saturn, are gas giants, being made of mainly of hydrogen and helium.
The initial molecular cloud was several light-years across and probably birthed several stars. It consisted mostly of hydrogen, with some helium, and little amounts of heavier elements fused by generations of stars.
This region would become the Solar System, called as the pre-solar nebula collapsed, conservation of angular momentum caused it to rotate.
Learn more about Solar system, here:
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The wavelength of a particular wave on the ocean is 5 meters. The
wave travels at a velocity of 10 m/s.
What is the frequency of this water wave in Hertz?
Answer:
node jaer le cotenidonv
Explanation:
escirbloa em cuietw n bl********
A car goes from rest to a speed of 25 m/s in 10 seconds. What is the car's average acceleration in m/s2?
Answer:
2.5m/s^2
Explanation:
to answer this question the best method would be to use SUVAT equations (attached)
here we have:
U= 0ms
v=25ms
t=10sec
a=?
the best equation to use in this instance is
v = u + at
substitute in the known values:
25=a10
25/10=a
2.5m/s^2 =a
The three vehicles shown below are all traveling at a speed of 15 m/s, but only the pickup truck has a changing velocity.
The pickup trick has a changing velocity
Because the pickup truck is __________.
Answer: its slowing down
Explanation:
The car is slowing down because its on the corner of the track.
If it were to go the same speed the other cars are going while on the straight part of the track it would go off the track therefore the car must slow down to stay in the race
The pickup truck has a changing velocity as it is slowing down. This is because the truck is on the corner of the truck.
What is the reason for changing velocity?
An object can change its velocity in a number of different ways as it can slow down, it can speed up, or it can change its direction of motion. A change in the speed, or a change in the direction of motion, or a change in both the speed and direction of motion of the object means that the object has an overall change in velocity.
The pickup truck is slowing down because it is on the corner of the track. If it were to go on with the same speed as the other cars are going in the direction while on the straight path of the track it would go off the track and therefore the car must slow down to stay in the race of vehicles.
Learn more about Velocity here:
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Two runners start at the same point and jog at a constant speed along a straight path. Runner A starts at time t = 0 s, and Runner B starts at time t = 2.5 s. The runners both reach a distance 64 m from the starting point at time t = 25 s. If the runners continue at the same speeds, how far from the starting point will each be at time t = 45 s?
Answer:
See explanation below
Explanation:
First thing to do here, is to calculate the speed of each runner. The problem states that both runners jog at a constant speed. We are given data for both runners, the starting time and the time where both of them reach the same distance.
With these data we can calculate the speed of both runners. Let's do it with runner 1:
If by t = 25 s it reach a 64 m of distance, then his speed:
V = d/t (1)
Replacing we have:
V₁ = 64 / 25 = 2.56 m/s
With this speed we can calculate the distance at t = 45 s so:
d = V * t (2)
d₁ = 2.56 * 45
d₁ = 115.2 mSo Runner 1 will be at 115.2 from the starting point at 45 seconds.
For runner 2, he began at t = 2.5 s, but he reach the 64 m at 25 s, so his speed would be:
V₂ = 64 / (25-2.5) = 2.84 m/s
And the distance at t = 45 s
d₂ = 2.84 * 45
d₂ = 127.8 mRunner 2 is 127.8 m from the starting point at 45 seconds.
Hope this helps
2. Does a solar cell always maintain the potential across its terminals
constant? Discuss.
Answer:
hi
Explanation:
will give brainliest to correct answer.
A particle has a charge of 1.9x10-6C. What is the charge on a second particle if the electrical force acting on it is 25N at a distance of 0.32m away?
Answer:
1.5x10^-4C
C=Couloumb's
Explanation:
Expression for the electric force between the two charges is given by -
F = (k*q1*q2) / r^2
Here, k = constant = 9 x 10^9 N*m^2 / C^2
F=25N
q1 = 1.9x10^-6 x 10^-6 C
q2 = ?
r = 0.32m
Substitute the given values in the above expression -
25N= 9x10^9 *1.9x10^-6 *q2 / 0.32m^2
25N= 17,100*q2 / 0.1024m
Next part is algebra multiply both sides by 0.1024 to remove denominator
2.56=17,100*q2
Divide both sides to isolate q2
q2= 1.5x10^-4C
will give brainliest to correct answer.
A particle has a charge of 1.9x10-6C. What is the charge on a second particle if the electrical force acting on it is 25N at a distance of 0.32m away?
Answer:
1.5X10^-4C
Explanation:
Expression for the electric force between the two charges is given by -
F = (k*q1*q2) / r^2
Here, k = constant = 9 x 10^9 N*m^2 / C^2
q1 = unknown
F=25N
q2 = 1.9x10^-6 C
r = 0.32 m
Substitute the given values in the above expression -
25=9x10^9 *(q1) * 1.9 x10^ -6/ (0.32m)^2
25= 17,100* (q1)/ 0.1024
multiply both sides by 0.1024 to get rid of the denominator
2.56=17,100*(q1)
Divide both sides by 17,100 to isolate q1
q1=1.5x10^-4C
Now it's your turn
6
A golfer hits a ball of mass 45 g at a speed of 40 m 5-1 (Figure 4.15). The golf club is
in contact with the ball for 3.0 ms. Calculate the average force exerted by the club on
the ball.
Answer:
The average force the golf club exerts on the ball is 600 N
Explanation:
Newton's second law of motion states that force, F, is directly proportional to the rate of change of momentum produced
F = m× (v₂ - v₁)/(Δt)
The given parameters of the motion of the ball are;
The mass of the ball, m = 45 g = 0.045 kg
The initial velocity of the ball, v₁ = 0 m/s
The speed with which the ball was hit by the golfer, v₂ = 40 m/s
The duration of contact between the golf club and the ball, Δt = 3 ms = 0.003 seconds (s)
By Newton's law of motion, the average force, 'F', which the golf club exerts on the ball is therefore, given as follows;
F = 0.045 kg × (40 m/s - 0 m/s)/(0.003 s) = 600 N
The average force the golf club exerts on the ball = F = 600 N.
WHICH ONE!!! ASAP FOR A RETAKE FOR SCIENCE PLS
A bucket tied to a rope is moving at a constant speed of 5.0 m/s in a circle of radius
2.0 m. Calculate the approximate magnitude of the centripetal acceleration of the bucket.
The below answer choices are in m/s^2
A.) 2.5
B.) 6.2
C.) 12.5
D. None of these
Answer:
[tex]a=12.5\ m/s^2[/tex]
Explanation:
Given that,
The speed of the bucket tied to a rope, v = 5 m/s
The radius of the circle, r =2 m
We need to find the magnitude of the centripetal acceleration of the bucket. The formula for the centripetal acceleration is given by :
[tex]a=\dfrac{v^2}{r}\\\\a=\dfrac{(5)^2}{2}\\\\a=12.5\ m/s^2[/tex]
So, the centripetal acceleration of the bucket is [tex]12.5\ m/s^2[/tex].
A dog running at 7.92 m/s slows down to 3.22 m/s in 4.88 s. How far does he go during this period of time?
Answer:
the distance traveled by the dog is 27.18 m.
Explanation:
Given;
initial velocity of the dog, u = 7.92 m/s
final velocity of the dog, v = 3.22 m/s
time of motion, t = 4.88 s
The distance traveled by the dog is calculated as;
[tex]s = (\frac{v+u}{2} )t\\\\s = (\frac{7.92 + 3.22}{2} )(4.88)\\\\s = 27.18 \ m[/tex]
Therefore, the distance traveled by the dog is 27.18 m.
If an object has a density of .7 it will float . true or false
Answer:
If your basis is water, then yes. It will float because thw density of water is 1. Anything lower than 1 will float ON WATER but anything higher than 1 will sink.
What is a living organism? Give a few examples.
Please help! Own words please!
Will mark brainliest!
Answer:
It's a individual form of life. Examples of this are bacterium , protists and fungus
A man travels 9 units to the right and then 11 units to the left find the displacement and distance travelled
Answer:
Displacement = -2 units and Distance = 20 units
Explanation:
It is given that,
A man travels 9 units to the right and then 11 units to the left.
We need to find the displacement and distance traveled.
Let the left side is negative and the right side is positive.
Displacement = -11 + 9
= -2 units
Distance = 11 units + 9 units
= 20 units
Hence, the displacement and distance travelled is (-2 units) and 20 units.
Pre-questioning identifies a purpose for reading.
Please select the best answer from the choices provided
OT
O F
help pleaseeeee !!
Answer:
True
Explanation:
Pre-questioning may help a reader focus on information s/he hopes to find in the reading selection.
Answer:
True!!
Explanation:
I took the practice thing on edge :))
How does each new lightbulb affect the others
Answer:
it gives people light
Explanation:
the light bulb is very important and if it affects other because it gives us light and we need light for tons of stuff
A train moves at a constant velocity of 90 km/h. How far will it move in 0.25h?
Calculate the time of fight for a horizontally launched projectile from a height of 20m above the ground with an initial velocity of 5m/s.
Please
Answer:
0.5sec
Explanation:
Parameters
Height(H) =20m
Initial velocity(u) = 5m/s
Acceleration due to gravity(g) =10m/s^2
Method one
Using the second law of motion
H=ut-1/2gt^2
20=5t-1/2×10×t^2
20=5t-5t^2
dh/dt = 5-10t
where any constant is zero therefore the 20 is zero
5-10t=0
Collect like terms
-10t= -5
t=1/2 = 0.5sec
2nd method
Parameters
Height(H) =20m
Initial velocity(u) = 5m/s
Acceleration due to gravity(g) =10m/s^2
Using the time taken formula
t=u/g
t=5/10
t=0.5sec
in December which will have a longer day length a country im notheren hemisphere or southern hemisphere
Answer:
Southern Hemisphere
Explanation:
Calculate the percentage increase in speed of the cyclist when the power output changes from 200 W to 300 W.
Answer:
50%
Explanation:
Given
Initial power = 200W
Final power = 300W
Increment = 300 - 200 = 100W
percentage increase = increment/initial power * 100
percentage increase = 100/200 * 100%
percentage increase = 0.5 * 100
percentage increase = 50%
Hence the percentage increase in speed is 50%
Identify how scientists use radioactive isotopes by selecting the best answers from the drop-down menus. Archaeologists use radioactive isotopes to . Scientists use radioactive isotopes in agriculture to
Answer:
In order to determine or find out about the age of archaeological finds such as fossils, rocks, etc., archaeologists use radioactive isotopes in a process called radioactive dating.
In agriculture, radioactive isotopes have a lot of uses. These comprise of but are not limited to the following:
Improvement of food cropspreservation of food, Establish and estimate the presence and volume of water in the soil for farms;Hormonal analysis for animals (livestock) etcExplanation:
C-14 and Phosphorus - 32 are examples of Radioactive isotopes. Because they decay over time, they are easy to use when it comes to radioactive dating.
When an isotope carried an unstable amount or number of atoms, neutrons, and protons, they are said to be Radioactive. It also means that they have too unstable or excess energy in their nucleus. This condition causes them to decay faster than their stable relatives.
In archaeology, dating the artifacts that are discovered is important because it helps to establish the correct relationship between one find or artifact and another. Because humans can't go back in time, one of the ways to know what humans did or didn't do, or what events occurred in a place by other living things is the items/evidence they left behind. Categorizing these times/artifacts by date helps to give a clearer picture of what happened in a particular block of time and this is exactly what dating is all about.
In agriculture, one of the radioactive isotopes used is Phosphorus - 32.
When the plant's uptake of fertilizer from the roots to the leaves needs to be established, Phosphorus-32 is utilized. A fertilizer that has already been mixed with the above radioactive isotope is administered to the plant using a hydroponic system or via the traditional means (water in the soil). The phosphorus 32 emits beta radiation which is then tracked and mapped accordingly.
Cheers
Answer:
1. C (determine the age of ancient artifacts)
2. A (understand the biological and chemical processes in plants)
3. B (determine the age of rocks and fossils)
Explanation:
The other guy didn't quite give a clear answer so I might as well help some people.
Atom X contains seven protons and seven neutrons. Atom Z contains seven protons and eight neutrons. Which of the following statements BEST describes the two atoms?
: Modeling Chemical Reactions
Due 02/01/21 11:59
Keesha performed a chemical reaction, and the products looked quite different from the reactants She knew the amount of matter had not changed due
to the law of conservation of mass According to the law or conspivation of mass, what happens in a chemical reaction?
A Matter is not created or destroyed and the same amount of mass remains
B A new kind of matter is created and the amount of mass either increases or decreases
C Matter is not created or destroyed and the amount of mass may change after the reaction
D. New matter is created and changes form so that the mass of the reactants and the products will almost be equal
no
Answer:
A Matter is not created or destroyed and the same amount of mass remains
Explanation:
In a chemical reaction, according to the law of conservation of matter, "matter is neither created nor destroyed and the same amount of mass remains in such a process".
New kinds of products are formed in a chemical reaction because they undergo chemical changes. The chemical changes results in energy changes and formation of new kinds of substances. Based on the law of conservation of matter, mass is constant. Mass is not lost or gained.I need help on the data section of the circuit design lab on Edg.
I hope it's not too late, but here you go
Would this circuit be parallel or series?
It would be a parallel circuit.
Light strikes a smooth wooden tabletop. What happens to the light after it is reflected?
O The light rays bounce off the table and all move in the same direction.
O The light rays bounce off the table and move in different directions.
O The light rays pass through the table and all move in the same direction.
O The light rays pass through the table and move in different directions.
Answer:
The light rays bounce off the table and all move in the same direction is answer.
Explanation:
I hope it's helpful!
Answer:
A. The light rays bounce off the table and all move in the same direction.
Explanation:
What Determines the amount of TE of an object
Answer:
To find the volume of a rectangular object, measure the length, width and height. Multiply the length times the width and multiply the result by the height. The result is the volume. Give the result in cubic units, such as cubic centimeters.
Explanation:
Answer:
Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. The amount of kinetic energy depends on mass and speed.
Explanation:
If you move 50 meters in 10 seconds, what is your speed
Explanation:
My answer didn't save :(
5 meters per second
11.1845 miles per hour
Explanation:50/10=5
