Answer: They know that while the cake is in the oven, a chemical change that involves energy occurs.
Explanation:
The total amount of energy stays the same, but it changes from one form to another. The correct option is D.
What is law of conservation of energy?According to the rule of conservation of energy, energy can only be transformed from one form of energy to another and cannot be created or destroyed.
This indicates that unless energy is added from the outside, a system always has the same quantity of energy.
The law of conservation of energy, which is found in physics and chemistry, stipulates that the total energy of an isolated system stays constant over time.
Greg and Valerie want to make a cake. They prepare the oven and mix the cake mixture. They are aware that a chemical shift involving energy takes place while the cake is baking.
Energy shifts from one form to another, yet its overall amount remains constant.
Thus, the correct option is D.
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A. The total amount of energy will either increase or decrease, depending on how much cake batter there is.
B. The total amount of energy increases because the oven gets very hot.
C. The total amount of energy decreases because it changes into matter.
D. The total amount of energy stays the same, but it changes from one form to another.
A 1 kg water bottle have 0.15m above your head How much GPE does it have
Answer:
GPE = 1.47 Joules.
Explanation:
Given the following data;
Mass = 1kg
Height = 0.15m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
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;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E 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;
GPE = 1*9.8*0.15
GPE = 1.47 Joules.
Two waves are traveling through a tube. Wave X has an amplitude of 1 cm, and wave Y has twice the amplitude of wave X. The energy of wave Y is
A.
four times that of wave X.
B.
two times that of wave X.
C.
one-fourth times that of wave X.
D.
half times that of wave X.
Answer:
it is A
Explanation:
i had the question
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Radioactivity is a part of our earth - it has existed all along. Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the food we eat and drink. There are radioactive gases in the air we breathe. Our own bodies - muscles, bones, and tissue - contain naturally occurring radioactive elements.
City A is much larger than city B, but they are located at the same latitude and elevation. However, city A is receiving more rainfall than city B. Given this information, which statement most likely explains why?
Answer:
City A has more large buildings than city B, which force more air upward into the atmosphere.
Explanation:
The statement which most likely explains why city A is receiving more rainfall than city B despite its larger area is because "City A has more large buildings than city B, which force more air upward into the atmosphere."
This is evident in the fact that city A's large buildings contribute a stream of lift to raise warm, moist, surface air into the humid air right over the area, where it then transformed into rain clouds.
Brainliest if right.
Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
Answer:
Explanation:
Remark
This is a conservation problem.
The momentum before impact = momentum after impact
momentum before
m = 0.04 kg
v = 300 m/s
momentum after
m = 0.5 kg + 0.04kg That's the mass of the block and bullet
v = ?
Solution
0.04 * 300 = 0.54 * x
12 kg m/s = 0.54 kg * x
12 / 0.54 = x
x = 22.22 m/s
According to Jean Piaget, in what stage of cognitive development are children able to understand conservation tasks?
Answer:
Preoperational
Explanation:
According to Piaget's theory of cognitive development, the preoperational stage is the second stage. This stage includes children between the age group of 2 to 7 years. Children can understand conservation tasks and learn to manipulate various symbols during this stage.
So, the answer is the preoperational stage.
Answer:
B Preoperational
Explanation:
This is the answer the person above is correct!
This is for edge 2021/2022
Hope this helps!!
How do airplanes stay in air?
Answer:
A plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky. The wings force the air downward and that pushes the plane upward.
Explanation:
planes stay in air because of 2 reasons :
Power of thier enginesAerodynamicsPlane's wings are designed to push the air downwards and letting the plane to lift off and stay in air..
Two lamps, each having reisistance of 3 Ohms, connect in a series. What current will flow if a voltage source of 5 V is connected at input?
The current across the circuit is equal to 0.833A if a voltage source of 5 V is connected at the input.
What is Ohm's law?Ohm’s law states that the potential difference across a circuit is directly proportional to the current flowing through it. Assuming temperature and all other physical conditions remain constant. Resistance's S.I. unit is rho (Ω), and the current raises the temperature.
The mathematical expression of potential difference provided by Ohm/s law is:
V = IR
Where V is the voltage difference and R is the resistance and I the current flowing.
Given, the resistances in a series circuit, R = 3 + 3 = 6 ohm
The voltage difference across the circuit, V = 5 V
The current flowing through the circuit will be:
V = I × R
I = V/R
I = 5/6
I = 0.833 A
Therefore, the current across the circuit is equal to 0.833 A.
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help please help!!!!!!!!
1. Electron
2. Neutron
3. Nucleus
4. Atom
5. Molecule
A 2 kg object is falling at 3 m/s at what rate is gravity working on the object
Answer:
6kgm/s
Explanation:
Let the rate of gravity be the momentum of the body
Momentum = mass * velocity
Given
Mass = 2kg
velocity = 3m/s
Momentum = 2 * 3
Momentum = 6kgm/s
Hence the rate at which the gravity is working is 6kgm/s
Help someone :(((((((((((((((
Wave Speed (M/s) = Frequency (Hz) x Wavelength (M)
Wave Speed = 3500Hz x 2.8M = 9800M/s
Answer = Top one
Answer:
A
Explanation:
3500Hz*2.5m=9800m/s
Give Brillienst please!!!!
The specific heat of oxygen is 3.47 J/gºC. If 750 J of heat is added to a 24.4 g
sample of oxygen at 295 K, what is the final temperature of oxygen? (Round
off the answer to nearest whole number)
Answer:
304 K
Explanation:
What property of the wave is labeled F?
amplitude
crest
trough
wavelength
A wave has a frequency of 875 hz and a wavelength of 352 m. At what speed is this wave traveling 
Answer:
308,000 or 30.8×10^3
Explanation:
v=f×lamda
v is ?, f is 875Hz, lamda is 352m
v=875×352
v=308,000
v=30.8×10^3 m/s
At the base of a hill, a 90 kg cart drives at 13 m/s toward it then lifts off the accelerator pedal). If the cart just barely makes it to the top of this hill and stops, how high must the hill be?
Answer:
the height of the hill is 8.622 m.
Explanation:
Given;
mass of the cart, m = 90 kg
speed of the cart at the base, v = 13 m/s
Let the height of the hill = h
Apply the principle of conservation of energy, to determine the height of the hill.
¹/₂mv² = mgh
¹/₂v² = gh
[tex]h= \frac{1}{2} \times \frac{v^2}{g} \\\\h = \frac{1}{2} \times \frac{13^2}{9.8} \\\\h = 8.622 \ m[/tex]
Therefore, the height of the hill is 8.622 m.
Please help.....Which of the following is most likely the distance between the Milky Way and another galaxy?
22,926 miles
30 million kilometers
10.8 billion light years
19.2 astronomical units
Answer:
The answer would be 10.8 billion light years
Answer:
10.8 billion light years is most likely the distance between the Milky Way and another galaxy.
Hope this helps :)
A runner starts a race at rest and reaches her top speed of 8.6m/s in 19.0s. What is the average acceleration?
Answer:
Average acceleration = 0.45 m/s²
Explanation:
Given the following data;
Initial velocity, u = 0m/s
Final velocity, v = 8.6 m/s
Time, t= 19 seconds
To find the average acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.
Mathematically, acceleration is given by the formula;
[tex]Acceleration = \frac{initial speed - final speed}{time}[/tex]
Substituting into the formula, we have;
Acceleration = (8.6 - 0)/19
Acceleration = 8.6/19
Average acceleration = 0.45 m/s²
On her trips from home to school, karla drives along the streets after exiting the driveway. She drives 1.85 miles south, 2.43 miles east and 0.35 miles north. determine the magnitude of karla's resultant displacment.
If a car is moving with a speed of 5 km/h on a highway. Find the distance travelled by the car in 2 hours?.
Answer:
Distance = 10 kilometers.
Explanation:
Given the following data;
Speed = 5km/h
Time = 2 hours
To find the distance traveled;
Distance = speed * time
Distance = 5 * 2
Distance = 10 kilometers
Therefore, the distance travelled by the car is 10 kilometers.
What information is needed to calculate the speed of a falling object?
A. Height that it was dropped from
B. All of these are needed to calculate the velocity
C. Volume of the object
D. Mass of the object
The drawing on the right shows a man (mass = 70kg) and the child (mass = 35 kg) push each other apart. The man moves away with a speed of 0.3 m/s relative to the ice.
Calculate the velocity of the child relative to the ice.
LET MOMENTUM EQUATION GUIDE YOUR THINKING...
SHOW YOUR WORK - INCLUDE UNITS
Answer:
Hope it would help you.Refer to the attachment..
Need help with these 2 questions ??????!!!!! Hurry this is due soon
Answer: The first one is A and C
Explanation:
Answer:
2 is A
3 is C
Explanation:
The reason why two is a is think of it like this. atoms have to be combined together to make a molecule. So in other words you need letters to create a word.
3 is c because in a recipe you have to have the right proportions. Just like you have to have the right proportions of atoms to create a molecule.
Which quantity is most closely related to the speed of gas particles? (2 points)
A The temperature of the gas
B The number of molecules in the gas
C The density of the gas
D The total volume of the gas
Quantity is most closely related to the speed of gas particles is the temperature of the gas.
Specifically, the speed of the molecules in a gas is dependent on its temperature (the higher the temperature the faster the gas molecules move). Another way to think of it is that the temperature of a gas is a measure of the average kinetic energy of that gas.
What is temperature ?"Temperature is the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius. Temperature indicates the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature)."
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A printer has a power of 100 W. It takes 30 seconds to print out a document. How much energy will it
have used?
100W translates to 100 watts consumed in 1 hour. Assuming the printer consumes electrical energy at a steady rate, then: 100 ÷ 60 = 1.6667 watts per minute. 1.6667 ÷ 2 = 0.8333 watts consumed in 30 seconds.
A printer has power of 100 W, and it takes time of 30 seconds to print out the document, then the power consumed in 30 seconds will be 0.8333 W.
What is Power?The quantity of energy moved or changed per unit of time is termed as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in historical texts. A scalar quantity is power.
Power is connected to other factors; for instance, the power required to move a land vehicle is equivalent to the sum of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.
Assuming the printer consumes electrical energy at a steady rate, then:
100 ÷ 60 = 1.6667 watts per minute.
Now, calculate the power consumed in 30 seconds,
1.6667 ÷ 2 = 0.8333 watts.
Therefore, the power consumed in 30 seconds will be 0.8333 watts.
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how much energy is needed to melt 1.25 kg of water at its melting point?
2830 kj
5.23 kj
0 kj
416 kj
Answer:
416 kj
Explanation:
hope it helps
Answer:
416 kj
Explanation:
For this particular problem, we are not dealing with a temperature change, rather, we are dealing with a scenario in which we are melting ice. Hence, we need to use the delta H fusion equation:
q=m⋅ΔHfus
Hope that I could help.
PLWASE HELP ILL DO ANYTHING
A stone at rest is dropped from a cliff, and the stone hits the ground after a time of 3 s. What is the stone's velocity when it hits the ground? O
2.94 m/s
3.3 m/s
323 m/s
29.4 m/s
Answer:
The stone is accelerating at 9.8 m/s². If we multiply that by three seconds, we get 29.4 m/s.
(ii) Calculate the force required to accelerate a mass of 60 kg at 2.5m/s2
force =
[2]
Answer:
Force = 150 Newton.
Explanation:
Given the following data;
Mass = 60kg
Acceleration = 2.5m/s²
To find the force;
Force = mass * acceleration
Force = 60 * 2.5
Force = 150 Newton.
Therefore, the force required to accelerate this mass is 150 Newton.
How are the ingredients in a mixture of iron filings and sand affected by being combined?
answer choices
1. Both the iron filings and the sand maintain their original physical properties when combined.
2. The physical properties of the sand change but those of the iron filings do not.
3. Neither the iron filings nor the sand maintain their original physical properties when combined.
4. The physical properties of the iron filings change but those of the sand do not.
Answer: Its A. Both the iron filings and the sand maintain their original physical properties when combined.
Explanation:
An inclined plane of length 4.5m and vertical height 1.5m is use to lift the load of 100N. what effort is required if the efficiency is 80%?
Answer:
Answer is efficiency = 50%
write the relation between horsepower and Watt?
Explanation:
Horsepower is related to watt as: 1 horsepower = 746 W = 750 W approximately. 1 horsepower (HP) = 750 watt (approx.) The power is one watt when one joule of work is done in one second.
Answer:
1HP = 746 watts
Explanation:
The relation between Horsepower and watt is that One Horse Power is equal to 746 Watts .
[tex]\large{\boxed{ \sf 1 HP = 746 Watts = 0.746 kW }}[/tex]