investigations allow for the control of variables.
The properties of a rectangular prism are listed below:
Density = 120 g/cm3
Length = 4 cm
Width = 2 cm
Height = 1 cm
What is the mass of the rectangular prism?
15 g
45 g
960 g
980 g
First calculate the volume of the rectangular prism by multiplying its length, width and height. The volume of the prism is 8 cm^3. Since density is known to be mass over volume, just multiply the given density with the volume. The mass of the prism then is 960 grams.
and Since density is the ratio of the substance's mass to its volume,Answer:
mass = 960 g
Explanation:
The rectangular prism have a density, length , width and height. We are asked to calculate the mass of the rectangular prism from the data given above.
The density of an object measures the mass of the object to it volume. Mathematically, density is the mass of an object divided by it volume. It is represented as follows;
density = mass/volume
The density of the prism is known from the data given but the volume is not given . Base on the data given, one could compute volume of the rectangular prism.
volume of a rectangular prism = Length × width × height
length = 4cm
width = 2cm
height = 1cm
volume of a rectangular prism = 4 × 2 × 1
volume of a rectangular prism = 8cm³
Since the volume is known the mass can be computed from the density formula.
density = mass/volume
mass = density × volume
density = 120 g/cm³
volume = 8cm³
mass = 120 × 8
mass = 960 g
How can the rate of a reaction be increased?
-Rate of reaction is the speed at which the reactants are converted to products.
-Rate of reactions depends on a number of factors which includes;
Concentration of reactants; increasing the concentration of reactants increases the rate of reaction. Temperature; An increase in temperature results to an increased rate of reaction. Increase in temperature increases the kinetic energy of molecules thus the collision per unit time also increases and hence the rate of reaction increases.Decreasing the size of particles of solid reactants also increases the rate of reaction. This is because smaller particles increases the surface area on which more collisions can occur thus a faster rate of reaction.Adding a catalyst also increases the rate of reaction. This is because catalysts lower the activation energy of reactants, minimum energy require by reactants for the reaction to take place. This thus increases the rate of reaction.Explanation:
There are many factors that are responsible for increasing the rate of reaction.
(1) Temperature: If the temperature increases, the kinetic energy of the molecules also increases. Hence, the collisions and ultimately the rate of reaction increases.
(2) The concentration of reactants: Higher the concentration, more will be the collision and hence more will be the rate of reaction.
(3) Pressure: Pressure is also directly proportional to the rate of reaction.
(4) Catalyst: Adding a catalyst increase the rate of reaction. Because it decreases the activation energy of the reactants. Hence, a small amount of energy is required by the reactants.
Hence, the above factors increases the rate of reaction.
A person drives 20 miles north and 45 miles east. What is the angle of the resultant straight to their destination?
a ____ agrees to help an immigrant become a citizen
Which is not a disadvantage of the use of solar energy. *
compare the relationship between kinetic energy and mass with that of kinetic energy and speed.
how does geosphere interact with biosphere
what speeds up condensation
answer these questions "type of heat transfer that occurs between the sun and venus" "measure of the average value of the kinetic energy of the molecules in a substance" "materials like aluminium pans and metal spoons that easily transfer heat" "measure of how well a substance absorbs heat" "type of energy that depends on how fast the molecules in a substance are moving" " temperature scale in which a reading of 0 equals the freezing point of water" "what does a doctor use to measure the average kinetic energy of the molecules in your body"
please please answer all of them and go in order
Heat transfer from the Sun to Venus occurs via radiation, and the measure of molecular kinetic energy in a substance is temperature. Conductors like aluminium transfer heat efficiently, specific heat denotes a substance's heat absorption capacity, thermal energy depends on molecular motion, and a thermometer is used by doctors to measure body temperature.
The type of heat transfer that occurs between the Sun and Venus is known as radiation. This is the transfer of energy by electromagnetic waves, which does not require a medium to travel through space.
The measure of the average value of the kinetic energy of the molecules in a substance is called temperature. Higher temperatures correspond to higher average kinetic energy among the molecules of a substance.
Materials like aluminium pans and metal spoons that easily transfer heat are called conductors. These materials are efficient in transferring thermal energy through direct contact.
The measure of how well a substance absorbs heat is known as its specific heat. It is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
The type of energy that depends on how fast the molecules in a substance are moving is called thermal energy. Higher speeds of molecular motion correlate with higher thermal energy.
The temperature scale is which a reading of 0 equals the freezing point of water is the Celsius scale, also known as Centigrade.
To measure the average kinetic energy of the molecules in your body, a doctor would use a thermometer. The reading is a direct indication of your body's temperature.
Which of the following best explains why mutations cannot cause evolution?
what is the answer to this problem
If a 65 kg student exerts a force with a magnitude of 100 N on a 100 kg desk The magnitude of the force that the desk exerts on him is
Answer:
100
Explanation: Answer for CK-12
When sugar is added to water, the sugar dissolves and the resulting liquid is clear. Have the combined sugar and water formed a pure substance or a mixture? Explain your a answer.
Is the star with the longest total lifetime Also the farthest from earth? Explain.
Stars with the longest lifetimes are not always the farthest from Earth, as factors like mass and luminosity influence a star's lifetime independently of its distance from Earth.
No, the star with the longest total lifetime is not necessarily the farthest from Earth. Stars can have different lifetimes based on their mass and luminosity, which affect how fast they burn their fuel. Distance from Earth is independent of a star's lifetime, and factors like apparent brightness and luminosity can play a role in how we perceive a star's distance.
is one liter about an ounce a pint a quart or a gallon
Answer:
A quart
Explanation:
The conversion of different units in litres is defined below:
The value of 1 gallon is equal to 3.78541 litres.The value of 1 pint is equal to 0.473176 litre.The value of 1 ounce is equal to 0.0295735 litre.The value of 1 quart is equal to 0.94635 litre.Therefore, by seeing the above point the 1 quart is approximately equal to 1 litre.
Which of the following statements correctly compares ultraviolet and visible light?
A. UV light has more energy than visible light
B. UV light has lower frequency than visible light
C. UV light has a longer wavelength than visible light
D. UV light has a smaller amplitude than visible light
Final answer:
UV light has shorter wavelengths and higher frequencies than visible light, resulting in more energy, which is why statement A is correct.
Explanation:
The question asks which statement correctly compares ultraviolet (UV) and visible light. The correct answer is A, which states that UV light has more energy than visible light. This statement is accurate because in the electromagnetic spectrum, UV light has shorter wavelengths and higher frequencies than visible light, both of which contribute to its higher energy levels. Unlike visible light, the higher energy of UV light can be enough to break chemical bonds, such as those in DNA, which can lead to cellular damage and is why it is often blocked by sunscreen and sunglasses.
a 10 kg rock is suspended 320 m above the ground calculate the speed in which the rock hits the ground
The initial ___________ energy is equal to zero because the starting point is set at zero height to make things easier.
kinetic
potential
Answer: Potential energy
Explanation:
The initial potential energy is equal to zero. Potential energy is energy possessed by a body by virtue of its position. A body that is not moving is said to be in position and a body in position will have a zero velocity.
You and two of your friends go to the movies. Each ticket cost $7.50. You share the cost of the popcorn. If each person pays $9.05, how much was the popcorn?
What is the best explanation of the importance of the Eighth Amendment?
A. If people cannot talk about policies, they cannot change them.
B. People in the military should have the right to vote in elections.
C. People accused of a crime need to be treated fairly to preserve justice.
D. People need to have the ability to protect themselves and their homes.
Answer:
D
Explanation:
Hope it helps!
Which theory was revised to obtain the theory of plate tectonics?
Continental Drift Theory
Mid-Atlantic Ridge Theory
Pangea Theory
Seafloor Spreading Theory
Answer:
Explanation:
Continental Drift Theoryin your opinion, what is the greatest environmental concern? what should be done about this?
Which of the following is a characteristic of the sun energy arrive on Earth A.it cannot travel through the air B.It cannot travel through space C.It is made up of rays of varying frequencies. D.It is made up of rays of the same wavelength
Answer:
C-it is made up of rays of different wavelengths
Explanation:
It is because the sun produces rays of different wavelengths
i
What is acceleration?
a) the change of velocity over distance
b) the change of inertia over time
c) the change of velocity over time
d) the change of speed over time
C) The change of velocity over time
Final answer:
Acceleration is the rate of change of velocity over time. It is a vector quantity that can signify speeding up or slowing down and is measured in meters per second squared. So the correct option is c.
Explanation:
Acceleration is the rate at which velocity changes over time and can involve a change in speed, direction, or both. The formula for average acceleration is given by the change in velocity (∆v) divided by the time interval (∆t) over which this change occurs. It is important to note that acceleration is a vector quantity, meaning it has both magnitude and direction. Thus, acceleration can be positive (speeding up) or negative (slowing down, also known as deceleration). The SI unit for acceleration is meters per second squared (m/s2).
Therefore, the correct answer to the question 'What is acceleration?' is c) the change of velocity over time.
2. Which of the following is Not true about the noble gases? a. They have completely filled energy levels. b. They have weak intermolecular forces. c. They do not bond with other elements in nature. d. They have boiling points above room temperature.
The statement that is NOT true about noble gases is 'They have boiling points above room temperature.' Noble gases have low boiling and melting points due to weak London dispersion forces, they have filled energy levels, and they do not generally bond with other elements because of their stability.
Explanation:The statement that is NOT true about noble gases is 'd. They have boiling points above room temperature.' Noble gases, such as helium, neon, argon, krypton, xenon, and radon, have very low melting and boiling points.
This is due to the weak London dispersion forces that exist between the individual atoms. These weak forces can barely hold the atoms together which results in the low boiling and melting points.
Additionally, noble gases have completely filled energy levels and are stable, leading to the fact they rarely bond with other elements in nature. This stability is responsible for their name 'noble' as they are 'above' interacting with others, similar to nobility. So, the statements 'a. They have completely filled energy levels', 'b. They have weak intermolecular forces', and 'c. They do not bond with other elements in nature' are all accurate.
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explain why a car with a large mass might use more fuel than a car with a smaller mass. Assume both cars drive the same distance.
Which statement is accurate for these two sub-atomic particles. A) They both have a neutral charge. B) They both have a positive charge. C) They are both located in the nucleus. D) They are both located outside the nucleus
Answer:
C!Explanation:
The mass of an object is equal to its weight true or false?
It is false that the mass of an object is equal to its weight, as it is never the same.
What is mass?In physics, mass is a quantitative measure of inertia, which is a foundational element of all matter.
It is, in effect, the opposition that a body of material provides to a change in its pace or position when a force is applied to it.
The smaller the change generated by an applied force, the greater the mass of the body.
The mass of an object is a fundamental quantification of its matter content.
Weight is a measurement of an object's gravitational force. It is determined not only by the mass of the object, but also by its location. As a result, weight is a measure of force.
A balance is used to measure mass. Mass can be measured in the lab using a triple beam balance or an analytical balance.
Thus, the given statement is false.
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Why is there diversity of life on Earth? A. so that young organisms can recognize their parents B. so that living organisms can survive and reproduce C. so that organisms create unique homes D. to encourage organisms to compete with each other