A 31 g block of ice is cooled to -76°C. It
is added to 592 g of water in an 75 g copper
calorimeter at a temperature of 21°C.
Find the final temperature. The specific
heat of copper is 387 J/kg • °C and of ice is
2090 J/kg . °C. The latent heat of fusion of
water is 3.33 x 10 J/kg and its specific heat
is 4186 J/kg °C.
Answer in units of °C.
Answers
Answer:
Final temperature is approximately 18.09⁰C
Explanation:
Solution is in the attached pictures
Related Questions
A steady increase in global temperature has been recorded between 1900 and today. Before concluding that this rise in temperature is the result of the increased burning of fossil fuels since that sametime, which of the following questions would have to be answered? *
A. What is the CO2 content in one metric ton of fossil fuels?
B. Which gases are released when burning fossil fuels?
C. What, if any, temperature rise was occurring prior to 1900?
D. None of these
Answers
The answer would be D. None of these
None of these questions can help support the reason that the temperature increase is based off of the burning fossil fuels.
Hope this helps!
Answer:
C is correct
Explanation:
what is kinetic energy
Answers
Answer:
energy which a body possesses by being in motion.
Explanation:
Which of the following describes how the current in a circuit can be increased? Select all that apply.
A.
increase the voltage and the resistance
B.
increase the voltage while keeping the resistance constant
C.
decrease the voltage and the resistance
D.
decrease the resistance while keeping the voltage constant
Answers
Answer:
B. and D. would be my best guess.
Explanation:
The reason why is because if you lower the resistance, the voltage will be higher, and if you higher the voltage, the resistance would be lower and the voltage would higher.
Based on the law of conservation of energy hiw can we reasonably improve a machines ability to do work
Answers
A boy throws a ball up into the air with a speed of 12.3 m/s. The ball has a
mass of 0.25 kg. How much gravitational potential energy will the ball have at
the top of its flight? (Assume there is no air resistance.)
A. 13,5 J
B. 20.23
C. 18.9 J
D. 12.13
Answers
This graph provides data on the amount of water needed to grow four different crops, each used to produce ethanol, a fuel. For each crop, the data shows how many liters of water are needed to produce one liter of ethanol fuel. Which of the following would require using the most water? *
Producing 100 L of ethanol from sugar cane
Producing 200 L of ethanol from sugar beet
Producing 300 L of ethanol from potatoes
Producing 400 L of ethanol from corn
Answers
Answer:
Producing 300 L of ethanol from potatoes
Explanation:
From the diagram, one liter of ethanol production from sugar cane requires 2000 liters of water. Hence, in order to produce 100 L of ethanol from sugar cane, 2000 x 100 = 200,000 L of water.
1000 liters of water is needed to produce 1 liter of ethanol from sugar beet. Hence, 200 x 1000 = 200,000 L of water will be needed to produce 200 liters of ethanol.
1000 liters of water is also required to produce 1 liter of ethanol from potatoes, hence, 300 x 1000 = 300,000 L of water would be required to produce 300 L of ethanol from the same material
About 500 liters of water is required to produce 1 liter of ethanol from corn, hence, 400 x 500 = 200,000 L of water would be needed to produce 400 L of ethanol from corn.
In conclusion, producing 300 L of ethanol from potatoes would require using the most water among all the options.
Scientists studying a region in southern Florida have noticed drastic changes in the availability of freshwater. Which of the following probably did NOT contribute to these changes? A. Several years of declining rainfall B. Decrease in the population of pond plants C. Building of new homes in the area D. Construction of a dam on the local river
Answers
Answer:
C. Building of new homes in the area
I'm not totally sure but I think this is the best answer.
In Charles Law, what is the measurement for temperature?
Answers
Answer:
The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius).
when an electric current runs through a wire a magnetic field is included where?
Answers
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw
based on this description?
The electric field points to the left because the force on a negative charge is opposite to the direction of the field,
The electric field points to the right because the force on a negative charge is in the same direction as the field,
No conclusion can be drawn because the sign of the charge creating the field is unknown,
No conclusion can be drawn because the amount of charge on the test charge is unknown.
Answers
Answer:a
Explanation:
Answer: ( A )
Explanation: the answer is a
In a landfill, old biodegradable materials are breaking down while at the same time, new trash is being added daily. Which statement describes the relationship between a landfill and the mass of the Earth?
A.) The mass of the Earth increases and decreases depending on the amount of trash added to the landfill.
B.) The mass of the Earth decreases due to materials breaking down in the landfill.
C.) The mass of the Earth increases due to trash being added to the landfill.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
Answers
Answer:
Ok, first, what is trash?
Trash can be different things, like organic stuff (remains of fruit or wood) or not-organic (like plastic)
Naturally, those things come from Earth, meaning that that:
The fruit is on Earth.
Someone eats the fruit
the rest is trowed in the trash
the trash is returned to some location on the Earth.
So the mass of the fruit is always in the Earth, this means that the mass of the Earth does not change by this process.
Now in the process of materials breaking down, those materials are being "absorbed" by the land, so the mass remains on the planet, this process also does not change the mass of the Earth.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
What does the term “retroperitoneal” mean in the terms of the location of the kidneys ?
Answers
Answer:
"Retroperitoneal" refers to the back of the peritoneum, the membrane that lines the anatomical space in the abdominal cavity. Kidney stones may cause pain to the organs within the retroperitoneal space. A diagram of the aorta, a retroperitoneal structure.
Explanation:
how does force do positive work on an object?
Answers
Answer:
It can do work on an object by moving it or changing it.
Explanation:
Brainliest?
Answer:
If you push on an object, thats positive work but if you pull on the object, thats negative work
Explanation:
Which of these forces pull or push upward, and which pull or push downward? Explain.
Answers
Answer:
A force is a push or pull that acts upon an object as a result of that objects interactions
Explanation:
HEELLLPPPPP !
Match the property with the correct type of metal.
Soft
(Alkali Metals)
(Alkaline Earth Metals)
Extremely reactive
1 valence electron
2 valence electrons
Harder, more dense
Answers
Answer: Alkali metals
Soft, Extremely reactive, 1 valence electron
Alkaline earth metals
Harder, more dense, 2 valence electrons
Answer:Alkali metals
Soft, Extremely reactive, 1 valence electron
Alkaline earth metals
Harder, more dense, 2 valence electrons
Explanation:
THE PERSON ABOVE ME IS CORRECT IM JUST PUTTING THIS HERE SO YOU KNOW I GOT 100% BECAUSE OF THAT PERSON THANK YOU
how are magnetic field lines like electric field lines?
A. they always point away from the north pole
B. they never connect
C. they always point toward a negative pole
D. they never cross
Answers
Answer:
I think maybe D
Explanation:
A is wrong, it has to be reversed
B is wrong cause they connect at the poles
C is wrong cause they always point north (that's how compases work)
D is the only one that could be possible
Hope this helped! :D
3. If you increase the distance between
two objects, the gravitational force
between the two objects
A)increases
B)decreases
Answers
Answer:
B
Explanation:
Fish are able to acquire the oxygen needed for respiration under water using gills. This is an example of which type of adaptation?
Answers
Answer:
Structural
Explanation:
Structural adaptations are a change to a organism's body, gills are part of the fish's body which would be why this is a structural adaptation!
Hope this helped! Stay safe have a good day or night!
50W of power is generated using 100J of work to move a box onto a shelf. How long did it take to move the box from the floor to the shelf?
Answers
Answer: time t = 2 seconds
Explanation:
Given that
Power P = 50W
Energy E = 100J
How long did it take to move the box from the floor to the shelf ? This implies time taken.
Power is defined as the rate at which work is done. I.e
P = W.D/t
Where work done = energy
50 = 100/t
Make t the subject of formula
t = 100/50
t = 2 second
A boy of 65 kg is skating around a circle with radius 3.8
meters. If he is moving at 4.25 m/s, what is his angular
momentum? (Round to the nearest hundredth).
A 1049.75 Nms
B 27.63 Nms
C 276.25 Nms
D 10.50 Nms
E 104.98 Nms
Answers
Answer:
A 1049.75
Explanation:
notice that a Nms is equal to a kg(m^2)/s which is what you get if multiply all three given values.
the formula is angular momentum = (mass)(velo)(radius)
therefore
65(3.8)(4.25) = the answer
= 1049.75
Work is the product of force and an object's
A. time
B. momentum
C. displacement
D. space
Answers
Answer:
C. displacement
Explanation:
Work is the product of force and an object's displacement. The correct answer is displacement and the correct option is option (C).
The result of a force and an object's displacement is called work. Work (W) is represented mathematically by the equation:
W = F × d
In the International System of Units (SI), the unit of work is the joule (J). When a force is applied to an object and it moves over a predetermined distance in the force's direction, work has been done.
No work is done if the item stays still or if the force and displacement are parallel to one another.
Therefore, Work is the product of force and an object's displacement and the correct option is option (C).
To know more about the work done:
https://brainly.com/question/32263955
#SPJ6
Which best describes a concave lens?
It is thinnest at its center and thickest at its outer edges.
It is curved outward at the center and thinnest at its outer edges.
It is curved inward in the center and thickest at its outer edge.
Answers
Answer:
Explanation:
Concave lens also called as diverging lens i.e. it diverges ray of light coming towards it.
Concave lens is thicker at the edges and thinner at the center.
Concave lens formed the virtual image of the object i.e. it cannot be trace on screen. This lens is used to treat the nearsightedness or myopia in which a person is unable to see the far object clearly.
Answer:
It is thinnest at its center and thickest at its outer edges.
Explanation:
graddy
What is the potential difference if a resistance of 20 ohms produces a current of 10 amperes?
Answers
Answer:
200 Volts
Explanation:
V= IR
V = 20 Ohm * 10 A = 200Volt
Potential difference V is 200 volt
Given that;Resistance R = 20 ohms
Current I = 10 Amp.
Find:Potential difference V
Computation:Potential difference V = IR
Potential difference V = 20(10)
Potential difference V = 200 volt
Learn more:https://brainly.com/question/21808222?referrer=searchResults
Which of the following terms is NOT part of a major chord?
A) Tonic
B) Platonic
C) Dominant
Answers
Answer: Option B.
Explanation:
In the major chord, the tonic is the "rest" note, this is the root of the chord, for example, in E major, E is the tonic.
Dominant is the note with more "strength" in the chord, is the fifth degree in the chord, for example in the C major chord, the dominant will be G.
Then the correct option is B, platonic.
Which is a true statement?
A.
Valence electrons play a key role in chemical reactions.
B.
The properties of elements in a group are identical.
C.
Hydrogen contains multiple valence electrons.
Answers
Answer:
C
Explanation:
how do electric and magnetic fields interact to create electromagnets?
Answers
Answer:
8548458
Explanation:
95895
As a liquid the refrigerant transfers thermal energy to the
outside air
TRUE
FALSE
Answers
Answer:
True
Explanation:
As a liquid, the refrigerant absorbs thermal energy from the cool air inside the refrigerator and changes to a gas. As a gas, it transfers thermal energy to the warm air outside the refrigerator and changes back to a liquid.
Someone HELPPPPPPPPP
MARKING BRAINLIST JUST CHECK WORK
(15 points)
Answers
Answer: I'm pretty sure you're right. Believe in yourself!
Explanation:
Which term is defined as the force applied to the object divided by the mass of the object?
speed
velocity
mass
acceleration
Answers
Answer:
acceleration
Explanation:
From the question: "FORCE... divided by the MASS..." is translated to a math equation as "F / m", where "F" is the force and "m" is the mass.
Now, the second Newton's law says "F = m . a ", where a is acceleration.
If you move m to the left side, clearly you have "F / m", and "a" is alone to the right. Math equation:
a = F / m
acceleration = force / mass
Question attached i need answers quick
