A student measures the time it takes for two reactions to be completed reaction eight is completed and 57 seconds and reaction be is completed and 48 seconds what can about the rights of these reactions
Answers
Answer: The rate of reaction B is higher
Explanation:
Just done the test, got it right.
The reaction b has the higher rate than a.
What is meant by rate of a reaction ?The pace at which the products are created from the reactants in a chemical reaction is referred to as the rate of reaction.
Here,
An indication of how quickly a reaction can be completed can be found in the reaction rate.
We can devise strategies to increase production by learning how quickly things are made and what slows down reactions.
As reactant concentrations fall over time, reaction rates often decrease as well. The reciprocal of the time required determines the rate of a reaction, or stage in a reaction.
R ∝ 1/t
Since, the rate of reaction is inversely proportional to the time, we can say that, the reaction b which was completed in lesser time compared to a, has the higher rate.
Hence,
The reaction b has the higher rate than a.
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Related Questions
A steel fork and a plastic spoon are both at the same temperature. The fork feels colder when you touch it. This is because:
1. Steel conducts thermal energy better than plastic.
2. Plastic loses more thermal energy than steel.
3. Steel contains more thermal energy than plastic.
4. The fork has more mass than the spoon.
Answers
Answer: The fork feels colder when you touch it because Steel conducts thermal energy better than plastic. The correct statement is 1
Explanation:
The ability of a material to transfer heat energy in an environment is known as thermal conductivity. It feels cooler to touch a steel spoon than a plastic spoon found in the same temperature because steel which is a type of metal is a highly efficient thermal conductor than spoon which is a plastic.
Metals can be defined as those substances which forms positive ion in a chemical reaction by lossing it's electrons. It has the following properties:
--> it is solid at room temperature
--> it has high melting point
--> it has high boiling point and
--> it is malleable.
Metals are said to be good thermal conductor because they contain free flowing conduction electrons. Therefore, when you touch a steel spoon and plastic spoon, it feels cooler because the steel metal is able to conduct heat away from your hand faster than the plastic which is a poor conductor of heat.
Answer:
1. Steel conducts thermal energy better than plastic.
Explanation:
Both objects are at the same temperature, and when you touch them, you feel the steel to be colder.
This happens because steel is a better thermal conductor, then when you touch it, it "steals" more thermal energy from you than the plastic.
As the amount of thermal energy transmitted is greater for the steel, you will feel it to be colder.
Then the correct option is the first one, steel conducts thermal energy better than plastic.
A copper coin resting on a piece of cardboard is placed on a beaker as shown in the diagram below. When the cardboard is rapidly removed, the coin drops into the beaker. The two properties of the coin which best explain its fall are its weight and its-
A: Temperature
B: Density
C: Volume
D: Inertia
Answers
Comets are typically ?
a.) chunks of ice that begin to vaporize if they pass close to the sun.
b.) slushy mixtures of liquid and ice.
c.) gaseous bodies from which some of the gas is pushed out by the sun to form a long tail.
d.) chunks of rock that are generally a few tens of kilometers in diameter.
??? i appreciate those that help!!! <3
p.s. this subject is astronomy it just doesnt have it as a subject option nor a science option....
Answers
Answer:
the answer is a) chunks of ice that begin to vaporized if they pass close to the sun
PLS HURRY THIS IS DUE IN 5 mins
(a) Waves P and Q have the same
but wave P has twice the
of wave Q.
(b) Waves Q and R have the same
but wave R has twice the
of wave Q.
(c) Wave
shows a steady frequency but changing amplitude.
(d) Wave
shows steady amplitude but a changing frequency
Tel Waves
and
have a lowamplitude and a steadvafrecuency
Answers
Answer:
(a) Waves P and Q have the same wavelength but wave P has twice the amplitude of wave Q.
(b) Waves Q and R have the same amplitude but wave R has twice the wavelength of wave Q.
(c) Wave T shows a steady frequency but changing amplitude.
(d) Wave S shows steady amplitude but a changing frequency.
e) Waves Q and R have a low amplitude and a steady frequency.
Explain how height, acceleration, and speed would affect the movement of a roller coaster.
Answers
Answer:
height affects the acceleration, which means it could go faster at the end of the slope since it got more distance to travel. acceleration could affect the speed of the roller coaster because it will go faster as it approaches the end of the slope and speed can affect the height it reaches because the faster it goes, the more distance it can travel before reaching to a stop.
Explanation:
TIME REMAINING 54:08 If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? from the hand to the cup from the cup to the hand from the cup to the surrounding air from the hand to surrounding air
Answers
Answer:
from the cup to the hand
Explanation:
Conduction is the heat transfer due to contact between object. During conduction, heat energy is transferred by contact from a body with higher temperature (hotter body) to a body with lower temperature (cooler body).
When a person with body temperature of 36°C comes in contact with a cup of coffee with temperature of 90°C, heat is transferred from the cup to the hand because the cup is hotter.
Three materials, put them in order of what
light does when it hits them.
clay, shiny dimes, eyeglasses
Answers
Answer:
it's a
Explanation:
hope this helps!!!!!!
Si una bala de 122 g que viaja a 350 m/s golpea a un policía con chaleco antibalas el cual soporta 120 J de energía, ¿la bala atraviesa o no el chaleco? Explicar brevemente.
Answers
Answer:
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
Explanation:
Un chaleco antibalas soporta el disparo de una bala disipando la energía de esta última a través de su propio material. Si sabemos que el chaleco antibalas soporta 120 joules de energía, cabe saber si la energía cinética traslacional es igual o inferior a ese límite, significando que la bala no atravesaría el chaleco.
La energía cinética traslacional de la bala ([tex]K[/tex]), in joules, queda expresada con la siguiente fórmula:
[tex]K = \frac{1}{2}\cdot m\cdot v^{2}[/tex] (1)
Donde:
[tex]m[/tex] - Masa de la bala, en kilogramos.
[tex]v[/tex] - Rapidez de la bala, en metros por segundo.
Si sabemos que [tex]m = 0.122\,kg[/tex] y [tex]v = 350\,\frac{m}{s}[/tex], entonces la energía cinética traslacional de la bala es:
[tex]K = 7472.5\,J[/tex]
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
2. A car traveling 300 miles in 5 hours is an example of
a) Speed
b) Velocity
DC) Acceleration
d) Direction
Answers
5. Why are ceramics and plastics good insulators?
Answers
Answer:
Here
Explanation:
They don't have free electrons moving around (delocalised electrons) so they can't conduct heat and electricity which gives them a property of good insulators. The insulators stop us having an electric shock because they don't conduct electricity as we use them to insulate metal wires and other metallic things. can i have brainliest now pls!
Potential energy is related to the speed of an object.
True or False
Answers
Answer:
False
Explanation:
Potential energy is stored energy, so it is not in motion. Kinetic energy is the energy in motion.
what if you were a mother for a day boys and girls
Answers
Boom
To launch a ball, a pinball machine compress a spring 4.0 cm. The spring constant is 13 N/M. What is the force of the spring on the ball when the spring is released?
Answers
Answer:
0.52 N
Explanation:
k = 13 N/m
x = 0.04 m
Plug those values into Hooke's Law:
F = kx
F = (13 N/m)(0.04 m)
F = 0.52 N
The magnitude of spring force acting on the ball when the spring is released is 0.52 N.
What is meant by spring force ?When a spring is extended or compressed, it produces a restoring force known as the spring force. Its displacement from its relaxed length is proportional to and in the opposite direction of it.
Here,
Displacement of the spring, x = 4 cm = 4 x 10⁻² m
Spring constant of the spring, k = 13 N/m
The spring is moved from its equilibrium position when it is compressed by the pinball machine. As a result, it encounters a restoring force that usually causes the spring to restore back to its initial position.
The expression for the restoring spring force is given by,
F = -kx
the negative sign implies that the force is restoring and is acting opposite to the direction of displacement.
F = kx
F = 13 × 4 x 10⁻²
F = 0.52 N
Hence,
The magnitude of spring force acting on the ball when the spring is released is 0.52 N.
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After students complete a scientific investigation, why is it important for the class to discuss the results obtained by each lab group?
A. Discussion of an investigation allow students to change data so that it matches the initial hypothesis.
B. Discussion of an investigation allow students to better understand methods and conclusions.
C. Discussion of an investigation allow students to select the best data and discard the rest.
D. Discussion of an investigation allows students find errors and change results.
Answers
PLEASE HELP ASAP!! DUE IN AN HOUR :’))!!
Answers
Answer: The object moves with constant velocity
Explanation:
In this velocity vs time graph we're dealing with Ap physics or regents physics. If we look at the slope we can see it is constant or not changing. Even so lets check the other answers and prove them wrong
The objects speed increases: This is wrong because the line shows a steady 5m/s with no change
The object is in free fall: If the object was in freefall the speed would be increasing as a result of acceleration due to gravity
The object moves with a constant speed: This seems to be the case since the slope or line doesn't change at all
The object stays at rest: Can't be right because the object is at a speed of 5m/s so we know its moving at least
The objects speed decreases: Again the line isn't going up or down so we can't say speed increases or decreases
For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table shown above. Which of these best explains the student’s data?
A.
The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.
B.
The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity.
C.
The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
D.
The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.
Answers
Answer: it’s c
Explanation:I put that as my answer for an assignment and got it right
The correct option is the speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
What is force?The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Given that in the question there is a child who is doing experiment for an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table given in question we see that speed increases as cart goes down.
The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
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a rock on the moon has a mass of 17kg, what is the mass if this same rock on earth?
Answers
Mass is an intrinsic property of the rock. The mass doesn't care where it is, and it makes no difference where the rock happens to be at the moment ... its mass doesn't change.
17kg of mass is 17kg . If it's 17kg on the moon, it's 17kg on Earth.
How common are elastic collisions in the real world?
Answers
Answer:
Perfectly elastic collisions can happen only with subatomic particles. Everyday observable examples of perfectly elastic collisions don't exist—some kinetic energy is always lost, as it is converted into heat transfer due to friction.
what us the motion? and what type of force did it experienced
Answers
Answer:
hi
Explanation:
How many months does it take for the sun to go around earth?
Answers
Answer:
Well, 365 days is about how long it takes for Earth to orbit all the way around the Sun one time.
Help a girl out ?! Plz ill give brainlest
Answers
Answer: A.
Explanation: If you move it from A to D look closely its a straight line.
What would likely happen first to the carbon in the deer carcass as it lies on the forest floor after the mountain lion has finished feeding on it?
a.
It would be incorporated into other organisms.
b.
It would be released back into the atmosphere.
c.
It would be turned into coal.
d.
It would be incorporated into the soil.
Answers
Answer:
B: It would be released back into the atmosphere.
Explanation:
Many sources of energy such as nuclear, coal, and oil use a fuel source to turn water into steam. The steam is then used to turn a turbine and generate electricity. Why are these sources not very efficient?
Answers
Coal, and oil are fossil fuels they are non - renewable. Nuclear sources are alo non renewable energy since they are unstable and hazardous to the environment and thus are difficult to manage for an efficient energy generation.
What are renewable energy sources?Renewable energy sources are those which can reproduced and will be long lasting over time. Whereas non renewable resources like fossil fuels and nuclear sources are not at all recycled. Moreover they causes harmful effects to the environment.
Waste from coal or natural gas production necessitates the use of surplus energy and environmental mitigation. Considering these variables, it is evident that coal's overall usable energy efficiency is just 29% of its initial energy value.
Solar energy is the better alternative as a renewable energy source.Wind, on the other hand, rates at 50% efficiency. Wind energy sometimes has a higher efficiency than this %. And using wind energy doesn't produce any pollution as solar energy.
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ist Law of Thermodynamics
Question 2 of 10
What is the change in internal energy if 20 J of heat is released from a system
and the system does 50 J of work on the surroundings?
Use AU = Q-W.
A. 30 J
B. 70 J
C. 30 J
D. -70J
Answers
Answer:
Change in heat energy = -30 J
Explanation:
Given:
AU = Q-W
Heat energy Q = 20 J
Work done W = 50 J
Find:
Change in heat energy
Computation:
Change in heat energy = 20 J - 50 J
Change in heat energy = -30 J
you can find the power of an electric appliance by measuring the energy it transfers in a certain what?
Answers
The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where:
1 W = 1 J/s (joule/second).
How is energy transfer measured?
Power is the rate of transfer of energy between energy stores.
One watt (W) is equal to one joule per second (J/s).
Energy transferred-
power is measured in watts (W)energy is measured in joules (J)time is measured in seconds (s)Learn more about the power of an electric appliance here: https://brainly.com/question/2288373
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In typical game play situation, (with no overtime), when is a game over?
A. When both teams score
B. When there is a tie
C. When the time runs out
D. When the referee decides the game is over
Answers
Answer:
C
Explanation:
Got it right on the test :)
Please mark brainliest!! <3
What kind of friction exists between solid objects moving In water?
static friction
sliding friction
rolling friction
drag
Answers
Answer:
The answer is drag.
Explanation:
Hope this helped Mark BRAINLEST!!!!!
Answer: D. Drag
Explanation:
Drag friction exists between solid objects moving in the water.
What was the change in height of an object if the system gains 50 J of gravitational potential energy from the movement of a 10 kg object?
Answers
Answer:
Height, h = 0.51m
Explanation:
Given the following data;
Mass = 10kg
Gravitational potential energy = 50 Joules
To find the change in height;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
Gpe = mgh
Where,
Gpe represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Substituting into the formula, we have;
50 = 10*9.8*h
50 = 98h
h = 50/98
h = 0.51m
Which element is always found in bioclastic sedimentary rocks?
Answers
The element which is always found in bioclastic sedimentary rocks is carbon.
What are sedimentary rocks?They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.
The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.
They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.
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Can you give me an example of how sound passes through a solid?please help
Answers
Answer:
sound travels through steel about 15 times faster than through air.
Explanation: