A system releases 7.9kj of heat while 6.5kj work is done on it. Calculate
A system releases 7.9kj of heat while 6.5kj work is done on it. Calculate the total change in internal energy during these operations in kJ.
Answer:14.4kJ
Explanation:
The first law of thermodynamics which states that the total change in internal energy (ΔU) of a system is the sum of the total heat (Q) released by the system to its surroundings and the total work done (W) on the system by its surrounding, can be expressed mathematically as follows:
ΔU = Q + W -------------------(i)
From the question;
Q = 7.9kJ
W = 6.5kJ
Substitute these values into equation(i) as follows;
ΔU = 7.9kJ + 6.5kJ
ΔU = 14.4kJ
Therefore, the change in internal energy is 14.4kJ
can someone help me plzzzz
Answer:
D I studied it in geography
Tell in your own words:
Why is it called a Solar System?
Activity 2: Compare and contrast a fungus and a plant.
Saccharomyces cerevisiac
Species
Tillandsia fasciculata
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
Answer:
Because of the gravity of the earth and its existence is a continuous point of the gravity of the earth and its existence is a continuous point of the gravity of the gravity of the gravity of the gravity of the gravity of the gravity of the gravity of its nature as a matter is a continuous improvement from our current property management policy
Explanation:
Uv6 fd t xr r r the following questions below are the differences between literary non-fiction text and the first one
During ______, the gravitational forces of the sun and moon pull on the Earth from the same direction, or opposite dire
Answer:
Spring Tides.
Explanation:
Tides can be defined as the rise and fall of water level in water bodies such as lakes and oceans due to the gravitational force of attraction exerted by the moon on earth. The side closest to the moon creates a bulge of water known as high tide. Low tides are generally experienced when a sea level is not within the bulge.
Generally, the gravitational pull of the Moon cause visible changes on planet Earth's surface.
This ultimately implies that, the pull of the Moon's gravity causes high and low tides on planet Earth's surface.
The various types of ocean tides based on the position of the Earth, Moon and the Sun are;
I. Neap tides.
II. Spring tides.
III. Low tide.
IV. High tide.
V. Brown tide.
VI. Rip tide.
VII. Red tide.
please help its urgent. 100 points
Answer:
1. Watson and Crick
2. Franklin and Wilkins
3. amount of base pairs
4. double helix
5. pyrimidine
6. purine
7. replication
8. DNA polymerases
9. nitrogen base
10. five-carbon sugar
11. phosphate group
Explanation:
I hope this was helpful, good luck!
1. Watson and Crick
2. Franklin and Wilkins
3. amount of base pairs
4. double helix
5. pyrimidine
6. purine
7. replication
8. DNA polymerases
9. nitrogen base
10. five-carbon sugar
11. phosphate group
What is a nebula?
the core of a massive star
a cloud of gas and dust in space
a swirling disk with a lot of gravity
the debris remaining after a supernova
A nebula can be defined as: B. a cloud of gas and dust in space.
What is a nebula?A nebula can be defined as a cloud of gas and dust in space.
This ultimately implies that, a nebula is a low-density cloud of interstellar hot gas and dust such as:
HeliumHydrogenBasically, a nebula is needed for the creation or formation of a star as follows:
An increase in the temperature at the center of a nebula causes the small nuclei of atoms to fuse.The nebula gets hotter and brighter as the nuclear fusion sets off a chain reaction while providing enough energy to turn the nebula into a star.Read more on nebula here: https://brainly.com/question/19530940
What is the process by which individuals that are better adapted to their environment survive and reproduce more successfully than others do?
I NEEEEDDD HELP PLEASE
Answer:
Digestive, excretory, circulatory, lymphatic, respiratory
Explanation:
digestive is your stomach
excretory is your colon
circulatory is your heart
lymphatic is your white blood cells and others
respiratory is your lungs
I'll go more in-depth in the comments but I think you need answers now
good morning.
what is photosynthesis?
Answer:
is the process by which plants use sunlight water and carbon dioxide to create oxygen and energy in form of sugar
In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its [ Select ] , a nerve cell will shuttle the message down its own axon and to the next neuron via its [ Select ] . This impulse will cause the cell to become [ Select ] and will effectively change the charge of the neuron to a [ Select ] charge. After sodium rushes into the cell, the potassium will rush out in order to [ Select ] . Once the impulse reaches the axon terminal, it is [ Select ] that stimulates a [ Select ] to continue the message to the next neuron. The neuron then undergoes a [ Select ] when all ions are repositioned with help of the
Answer:
The process of nerve impulse transmission by means of an action potential involves the processes of depolarization, repolarization, hyperpolarization and restoration of resting memebrane potential.
Explanation:
In order for a neuron to receive and transmit a message it must be in a polarized state. While in this rest state there are more sodium ions outside the cell membrane while potassium is prevalent inside the cell. This causes the neuron to maintain a neutral charge. Once the action potential arrives at its dendrites, a nerve cell will shuttle the message down its own axon and to the next neuron via its axon terminal. This impulse will cause the cell to become depolarized and will effectively change the charge of the neuron to a poositive charge. After sodium rushes into the cell, the potassium will rush out in order to restore its resting memebrane potential. Once the impulse reaches the axon terminal, it is used to open voltage- gated calcium channels releasing calcium ions that stimulates a neurotransmitter to continue the message to the next neuron. The neuron then undergoes a repolarisation when all ions are repositioned with help of the voltage-gated ion channels.
What is responsible for speeding up reactions in your body? (choose all that apply)
A. substrates
B. proteins
C. enzymes
Answer:
C
Explanation:
enzymes are catalytic protein that speed up reactions in the body
what is the water intake of gymnosperms
Answer:
Check down
Explanation:
Gymnosperms, like angiosperms (the flowering plants), differ from seedless plants (like mosses and ferns) in not requiring water for sperm to swim in to reach the egg. This means that the movement of pollen (male gamete) to ovule (female gamete) in seed plants relies on airborne transport, not water transport.
Which of the following cell components are most involved in determining an organisms traits
Answer:
chromosomes because they carry the DNA.
Explanation:
Look at image please
Answer:
This is easy: 2 Hydrogen and 1 Oxygen!
Explanation:
H20 means 2 H and 1 O
Answer:
Explanation:
She is confident, her idea is strong and connective Her voice is clear and enough for listening
Answer:
Explanation:
This should be you lol
Which of the following is a true statement about mitosis and meiosis?
Group of answer choices
A.Mitosis produces haploid cells, but meiosis produces polypoidy cells.
B.Mitosis produces haploid cells, but meiosis produces diploid cells.
C.Mitosis produces diploid cells, but meiosis produces haploid cells.
D.Mitosis produces monoploid cells, but meiosis produces haploid cells.
Answer:
C. Mitosis produces diploid cells, but meiosis produces haploid cells.
Explanation:
Mitosis produces 2 diploid cells that are identical to each other, and meiosis produces four haploid gametes (sex cells) that are different from one another.
state two differences between tastic and nastic movement in plants
Answer:
Explanation:
Tactic movement;
Movement is directly towards/away from stimulus
Stimuli consist of light/heat/chemical
Nastic movement;
non-directional movement
stimulus is touch/tugor pressure.
Explanation:
1.Movement is directly towards/away from stimulus
2.Stimuli consist of light/heat/chemical
for tastic movement
How long does it take a 100.0 g sample of As-81 to decay to 6.25g?
How long does it take a180 g sample of Au-198 to decay to 1/8 its original mass?
What is the half-life of a radioactive isotope if a 500 g sample decays to 62.5g in 24.3 hours?
How old is a bone if it presently contains 0.3125 g of C-14, but it was estimated to have originally contained 80.0 g of C-14?
Thallium-208 has a half-life of 3.053 minutes. How long will it take for 120.0 grams to decay to 7.50 grams?
Answer:
1. Total Time: (34s)*(4) = 132s
2. 2.69 days
3. 8.10 hours
4. 5730 years*8 half lives = 45,840 years
5. 12.21
What 3 ions does a muscle have to be missing to create muscle fatigue?
Answer:
nerves, muscle tissue,
DNA: TTCGCTTTCT mRNA: Amino acid:
Answer:
mRNA: AAGCGAAAGA
Explanation:
amino acid: lysine , arginine
this is not biology by the way its Science.
Question:Low viscosity lava is?
a.less runny.
b.more runny.
c.of more density.
d.of less density.
Please Help Me Figure it Out
Answer:
b
Explanation:
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
d. of less density
I'm quite sure it correct...
20. The five recognized periods of mass extinction have- *
Answer:
1. Ordovician Mass Extinction (about 44o million years ago)
2. Devonian Mass Extinction (about 375 million years ago)
3. Permian Mass Extinction (about 250 million years ago)
4. Triassic-Jurassic Mass Extinction (about 200 million years ago)
5. Cretaceous-Tertiary Mass Extinction (about 65 million years ago)
Explanation:
Which of the following terms signals the reader that
one event or factor caused another?
A. Meanwhile
B. In order to
C. Finally
D. Hence
SUBMIT
contains the ovary, which contains the ovules where the
cells are
The
produced.
Answer:
Flowers not only look pretty but, in fact, are important in making seeds. Flowers have some basic parts. The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil. It is attached to the long, tubelike structure called the style. The style leads to the ovary that contains the female egg cells called ovules.
Construct an argument based on data about the risks and benefits of renewable and nonrenewable energy resources.
Argument should consist of at least 100 words.
Which best describes an experiment?
In a lab a scientist measures the height of roses that received different fertilizers.
A scientist measures the speed at which a cheetah travels while it is hunting.
A scientist measures the rate at which a population of wild geese reproduces.
A scientist measures the width of a certain type of maple leaf throughout a forest.
Humans are in the group of living organisms that has the highest percentage of
species.
A. True
B. False
Thank you!
Answer:
The answer would be B. False.
Explanation:
Insects actually have moe than 1 million species, and that's only the ones that have been discovered so far, so that means it's false to say humans have the most.
WILL GIVE BRAINLIEST IF CORRECT
At one time, farmers had to spray insecticides on their fields to protect their crops from insects. Today, farmers can buy seeds that produce plants that are resistant to many insects. Which process contributed to the development of these seeds?
a. Cloning
b. Artificial Selection
c. Genetic Engineering
d. Asexual Reproduction
Answer:
C
Explanation:
Genetic Engineering is the largest contributor, but there's an argument to be made for artificial selection.
Answer:
The Answer Is C!!
Explanation:
once again, wassup yostos from bms Mrs hees 4th pd
Please help me. no links I will report you
Please answer fast for the 20 points.
Answer:
Request a refund for recent purchases · It's less than 48 hours since you bought an app or made an in-app purchase,
Answer:
D. several million years
Explanation:
find the velocity of the spacecraft:
6 ÷ 2 = 3 AU per year
the time for the spacecraft to travel to Wolf 359:
492,000,000 ÷ 3 = 164,000,000 = several million years