Answer:
Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity on an object.
Explanation:
Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale.
Final answer:
Mass is a measure of the amount of matter an object contains and is constant regardless of location, while weight is the gravitational force acting on an object's mass and varies with location. The statement that mass measures weight is false.
Explanation:
Understanding Mass and Weight
The statement 'Mass is a measure of weight' is false. Mass is a measure of the amount of matter an object contains and is independent of its location. It is typically measured in kilograms. Weight, in contrast, is a measure of the force of gravity acting on an object, which can vary depending on where the object is in the universe. Weight is equal to the mass of an object multiplied by the local acceleration due to gravity, and it is measured in newtons or pounds.
Common misconceptions often stem from the interchangeable use of mass and weight in everyday language. However, it's important to recognize that mass is a scalar quantity, which does not change with location, while weight is a vector quantity that does change depending on the gravitational pull at a given location.
For instance, an individual's mass remains consistent whether they are on Earth, the moon, or floating in space, but their weight would differ significantly in each of these locations due to varying gravitational forces.
Scientists believe that during the Late Cretaceous period, many small seas dried up and new mountains began to rise. Which would MOST LIKELY cause them to believe the temperature decreased during this time?
A) The absence of fossils of warm-weather plants.
B) The absence of fossils of many species of fish.
C) The discovery of fossils of fish with small legs.
D) The discovery of fossils of warm-weather insects.
Answer:
A) The absence of fossils of warm-weather plants
Explanation:
During the later stages of the Cretaceous period, the climate started to change. From the predominantly warm, tropical and subtropical, the climate started to have more variations, with mountainous climates starting to develop, as well as temperate climate types. This was caused by the movement of the tectonic plates, as it cause lot of changes in the landscape, positions of the continents, movement of the ocean currents, movement of the air masses. One indicator that the climate cooled down is that the fossils of tropical plants are lacking in most of the planet, and they are only limited to the lowest latitudes, while fossils from plants that are much better suited to temperate climates and colder climate are dominating.
Answer:
The absence of fossils of warm-weather plants might cause them to believe that the Earth grew cooler during this time. Tropical plants would not survive in cold temperatures.
how high up is a 3kg object that has 300 joules of energy
Answer: 10m (assuming gravity is 10m/s^2)
Explanation:
Energy (gravitational potential) = mass x acceleration due to gravity x change in height
E = mg∆h
300 = 3 x 10 x ∆h
∆h = 10m
what Mathematical formula is used to calculate force?
Answer:
F = m × a
Explanation:
M= Mass
A= Acceleration
F= Force
Final answer:
The main formula for calculating force is F = ma, according to Newton's Second Law of Motion. For forces like gravity and tension, specific adaptations of this principle are applied. Other situations may use formulas derived from the basic principles, depending on the context, such as impulse or material properties.
Explanation:
The mathematical formula most commonly used to calculate force is derived from Newton's Second Law of Motion, which states that force is equal to mass times acceleration (F = ma). When calculating the force of gravity on a mass, the formula F = mg can be used, where 'g' represents the acceleration due to gravity. Additionally, when dealing with the force of tension, it must equal the force of gravity plus any force necessary to accelerate the mass. Note that for the calculation of normal force and tension force, if it is not given, Newton's 2nd Law should be applied.
Relativistic force considers force as the time derivative of momentum. The average force can also be computed using the concept of impulse, where average force equals the force time curve area divided by the time interval. Furthermore, when dealing with specific situations like the force on a cable, the force can be found using the formula F = (Y * A * ΔL) / L, where 'Y' is the Young's modulus of the material, 'A' is the cross-sectional area, 'ΔL' is the change in length, and 'L' is the original length.
Which of the following statements is true?
Question 13 options:
You are exposed to nuclear radiation every day.
Most of the nuclear radiation you are exposed to in the environment is man-made.
Naturally occurring nuclear radiation is called background decay.
All natural radiation is at a level low enough to be safe.
A. You are exposed to nuclear radiation every day.
Answer:
A. You are exposed to nuclear radiation every day.
The speed of a tennis ball that is served is 73.14 m/s. During a serve, the ball typically starts from rest and is in contact with the tennis racquet for 30 milliseconds. Assuming constant acceleration, what is the average force exerted on the tennis ball during the serve, expressed in terms of the ball’s weight w?
450w
150w
250w
350w
Answer: Third option
F = 250w
Explanation:
The impulse can be written as the product of force for the time interval in which it is applied.
[tex]I = F (t_2-t_1)[/tex]
You can also write impulse I as the change of the linear momentum of the ball
[tex]I = mv_2 -mv_1[/tex]
So:
[tex]F (t_2-t_1) = mv_2 -mv_1[/tex]
We want to find the force applied to the ball. We know that
[tex](t_2-t_1) = 30[/tex] milliseconds = 0.03 seconds
The initial velocity [tex]v_1[/tex] is zero.
The final speed [tex]v_2 = 73.14\ m / s[/tex]
So
[tex]F * 0.03 = 73.14m[/tex]
[tex]F * 0.03 = 73.14m\\\\F=\frac{73.14m}{0.03}\\\\F=2438m[/tex]
We must express the result of the force in terms of the weight of the ball.
We divide the expression between the acceleration of gravity
[tex]g = 9.8\ m / s ^ 2[/tex]
[tex]F=\frac{2438m*g}{g},\ \ m*g=w\\\\g=9.8\ m/s^2\\\\F=\frac{2438w}{9.8}\\\\F=249w[/tex]
The answer is the third option
The average force exerted on the tennis ball during the serve in terms of its weight is closest to 250w, calculated using the equations of motion and Newton's second law.
In this case, the initial velocity is 0 m/s, and the final velocity is 73.14 m/s, with the ball in contact with the racquet for 30 milliseconds (0.03 seconds). The ball's weight w is the product of its mass m and the acceleration due to gravity g (w = mg).
First, we calculate the acceleration a using the equation:
a = (v - u) / t
where v is the final velocity, u is the initial velocity, and t is the time. Substituting the known values, we get:
a = (73.14 m/s - 0 m/s) / 0.03 s = 2438 m/s2
Now, to find the force F exerted on the ball, we use Newton's second law F = ma. However, we want F in terms of the ball's weight w. We know w = mg and F = ma, and by substituting for m from w, we get:
F = (w/g)a
Substituting for a and the acceleration due to gravity (approximately 9.81 m/s2), we find:
F = (w/9.81 m/s2)(2438 m/s2) = 248.72w
Therefore, the average force exerted on the ball in terms of its weight is closest to 250w.
PLEASE HELP ASAP!!
Which of the following diagrams represents a complete series circuit?
your answer would be The one in the top right corner that looks a bit like this..
Diagrams B represents a complete series circuit. The two bulbs are connected with a series with a battery.
What is series circuit?In the series circuit, the amount of current flowing through any component in a series circuit is the same and the sum of the individual resistances equals the overall resistance of any series circuit.
The voltage in a series circuit, the supply voltage, is equal to the total of the individual voltage drops. The two bulbs are connected with a series with a battery.
Hence, diagrams B represents a complete series circuit.
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Match each rock with the correct description.
1. cools quickly on the earth's surface
metamorphic rock
2. cools slowly beneath the earth's surface
organic sedimentary rock
3. formed from the remains of living organisms
intrusive igneous rock
4. formed from pieces of other rocks cemented together
extrusive igneous rock
5. formed when dissolved minerals harden
clastic sedimentary rock
6. formed from heat and pressure
chemical sedimentary rock
Answer:
Explanation:
1. cools quickly on the earth's surface
Extrusive igneous rock
2. cools slowly beneath the earth's surface
Intrusive igneous rock
3. formed from the remains of living organisms
Organic sedimentary rocks
4. formed from pieces of other rocks cemented together
Clastic sedimentary rock
5. formed when dissolved minerals harden
Chemical sedimentary rock
6. formed from heat and pressure
Metamorphic rocks
Answer:
1- Extrusive igneous rock
2- Intrusive igneous rock
3- Organic sedimentary rocks
4- Clastic sedimentary rocks
5- Chemical sedimentary rock
6- Metamorphic rock
Explanation:
Extrusive igneous rock- This are the igneous rocks that are formed when magma ejects out to the surface and quickly solidifies. Since they comes out to the surface, so they are considered to be extrusive igneous rocks. This type of rocks are comprised of smaller crystals due to the faster rate of cooling. For example, basalt.
Intrusive igneous rock- This are the type of igneous rocks that are formed due to the crystallization of magma at a certain depth. This rocks are made up of coarser crystals due to the slow rate of cooling. For example, granite.
Organic sedimentary rocks- This are the type of sedimentary rocks that are comprised of fossil or organic compound. These fossils are trapped about millions of years back. This type of rocks containing fossils are important for determining the past environment, climate and food habitat of these fossil organisms. For example Limestone.
Clastic sedimentary rocks- This are the sedimentary rocks that are formed from the compaction and lithification of loose sediments or broken rock materials. For example, sandstone.
Chemical sedimentary rock- This are the type of sedimentary rocks that are formed from the minerals (crystals). This minerals are made up of the elements that undergoes dissolution in water. For example, oolitic limestone.
Metamorphic rock- This are the secondary rock, either derived from the igneous, sedimentary or other metamorphic rock. These rocks are formed due to the extreme pressure, temperature condition. They are also known as the secondary rocks. For example, Quartzite.
What is a temporary magnet
A piece of iron that behaves like a magnet when it is touching a permanent magnet.
Satellite communication is only possible using
A) analog transmission.
B) digital transmission.
C) sound waves to transmit signal.
D) cellular devices such as phones.
Answer:
its b
Explanation:
Answer:
B) digital transmition
Explanation:
using radio waves to transmit the information.
Which model is most similar to that of Aristarchus?
Answer:The first one , option a
Explanation:
Answer:
A. First one with Sun at the center.
Explanation:
Aristarchus was a Greek scientist who proposed the theory that its not Earth which is fixed, its the Sun that has a fixed position and is placed at center where are all other planets are located at some distance from it and revolve around it.
This theory is referred as "Heliocentric". His theories were even attributed by Nicolaus Copernicus and was even know as Copernicus heliocentrism.
Two soccer players kick the same 1-kg ball at the same time in opposite directions. One kicks with a force of 25N the other kicks with a force of 10N . What is the resulting acceleration of the ball in m/s^2
Answer:
15
Explanation:
A wave has a wavelength of 2.30 m and a frequency of 370.0 Hz. What is the speed of the wave?
Answer:
Speed =
Explanation:
Speed = wavelength × frequency
Speed = 370 × 2.30 = 851m/s
Answer:
851 m/s
Explanation:
just got it right on edge
Laws that implemented the consumers' right to be informed forbid __________.
A.
informative advertising
B.
competitive advertising
C.
misleading advertising
D.
consumer advertising
Laws that implemented the consumers' right to be informed forbid misleading advertising.
Answer is C.
Laws that implemented the consumers' right to be informed forbid misleading advertising.
Answer: Option C
Explanation:
The laws that are implemented to protect consumer’s rights include the things discussed below.
The advertisements about any product should be informative. It should provide valid advertisements about that product. It prohibits the act of advertising falsified information about the product.
Business sellers usually advertise their product with false information to cheat the customers and make them buy their product just to attain profit. They usually aim to sell the product without any advertised usage. So, this kind of act is highly prohibited by the laws of Consumer’s rights.
Which of the following statements is true of sound transmission through various mediums?
Answer:
C
Hope This Helps! Have A Nice Day!!
The statements ‘Sound insulators prevent sound from being transmitted better than elastic solids' is true of sound transmission through various mediums.
Answer: Option C
Explanation:
The sound insulators are the better way to prevent sound from being transmitted than elastic solids as they have a higher tendency to absorb sound waves than the elastic solids. A good sound insulation is considered in the range of 45 dB.
Mineral wool, rock wool, fibreglass etc are the best to be fit in between the studs of the walls. They absorb the sound waves and help reducing the transmission of sound from the walls, windows, fences, etc.
35 points! “Come up with a word that does not change appearance in a mirror”
Answer:00000000000
Explanation:00000000000 will never change sides cause it looks the same
All of the planets in Earth's solar system must follow the same plane of motion. What's this plane called? A. Plane of the ecliptic B. Plane of spherical motion C. Plane of triangulation D. Plane of orbital rotation
Answer:
D. Plane of orbital rotation
Explanation:
The orbital plane of an object orbiting around another is the geometric plane that contains the orbit in question.
By definition, the inclination of a planet in the solar system is the angle between the orbital plane of the solar system and the orbital plane of the Earth.
Final answer:
The plane that all the planets in Earth's solar system must follow is known as the plane of the ecliptic (option A), which is approximately the same plane as Earth's orbit around the Sun.
Explanation:
The plane that all the planets in Earth's solar system must follow is called the plane of the ecliptic. This plane extends through the center of the Sun and the orbit of the Earth. All the planets revolve around the Sun approximately in this plane, and the Earth's axis of rotation is tilted at about 23.5° from being perpendicular to the ecliptic plane. As a result, Earth's rotational axis remains parallel to its previous position as it orbits around the Sun. Conversely, the so-called invariable plane, as discovered by La Place in 1784, is one where the angular momentum vector of the solar system remains constant and is not influenced by the planetary motions. However, for practical purposes, as observed from Earth, the ecliptic is the apparent path of the Sun and planets across the sky.
25 POINTS ------------------ (usatestprep)
Two iron balls of different mass are heated to 100°C and dropped in water. If the same amount of heat is lost by the two balls to water, what can be said about the final temperatures of the two balls? (Heat lost = mCpΔT, where m = mass of the object, Cp = specific heat capacity of the material, and ΔT = change in temperature).
A) Both balls will have the same temperature as the heat lost by both balls is the same.
B) Both balls will have the same temperature as the specific heat capacities of both balls are the same.
C) The lighter ball will have a higher temperature because the change of temperature is directly proportional to mass.
D) The heavier ball will have a higher temperature because the change of temperature is inversely proportional to mass.
Answer:
D) The heavier ball will have a higher temperature because the change of temperature is inversely proportional to mass.
Explanation:
As stated in the problem, the amount of heat released by each ball is
[tex]Q=mC_p \Delta T[/tex]
where
m is the mass of the ball
Cp is the specific heat of iron (so, it is equal for both balls)
[tex]\Delta T[/tex] is the change in temperature of each ball
In this problem, we are said that the amount of heat released by the two balls, Q, is the same. Cp is also the same: this means that the product [tex]m\Delta T[/tex] must be the same for the two balls. So, the mass and the change in temperature are inversely proportional: therefore, the heavier ball will have a smaller change in temperature. And since both balls starts from the same temperature, 100 C, this means that the heavier ball will reach a higher temperature than the lighter ball.
2. A rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of The acceleration due to gravity at the surface of the moon is What is the maximum height of the rock above the surface?
278 m
125 m
245 m
115 m
202 m
Answer:
278m
Explanation:
A rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of The acceleration due to gravity at the surface of the moon is What is the maximum height of the rock above the surface?
What type of season does Daytona Beach, FL most likely have?
very cold winters
mild winters
very hot summers
no winters
i believe its mild winters
Answer:
Very hot summers.
Explanation:
The temperature of the Daytona Beach of FL is mostly varies within the range of 50° F to 89° F and this temperature is rarely go below 36°F and rarely go above 93°F.
The summers of the Daytona Beach is very long, and the days are very cloudy and hot.
And the winters are very short and the are partly cloudy and warm.
what happens when the temperature of an object decreases
The molecules become more stiff and move slowly
PLEASE HELP ASAP!!
Which of the following diagrams represents a complete parallel circuit?
Answer:
Explanation:bottom left is the answer just did this and the other answer is wrong
Answer:
bottom left
Explanation:
Part 1: What are the two groups of planets based on composition?
Part 2: Describe the composition of each group.
The two groups of planets based on their composition are the terrestrial planets, and the jovian planets. The terrestrial planets are small, and their composition is different than that of the jovian planets. The terrestrial planets have a solid iron inner core, liquid iron outer core, silicate mantle, and silicate crust. The jovian planets are also called gas giants because they are much larger and are gassy, not hard as the terrestrial planets. These planets have a silicate inner core, ice outer core, liquid metallic hydrogen layer, liquid hydrogen layer, and on the top gaseous hydrogen.
Answer:
Part 1: The Terrestrial and the Jovian.
Part 2: Terrestrial are hard, rocky and solid while Jovian are composed of gases and have no solid surface.
Explanation:
According to the concept of length contraction, what happens to the length of an object as it approaches the speed of ligh and then slows down, eventually coming to a stop? O It is always observed as contracting It is always observed as the same length O It is observed as expanding and then contracting back to its original length O It is observed as contracting and then expanding back to its original length
Length contraction causes an object moving at a significant fraction of the speed of light to appear shorter along its direction of motion to an outside observer, and when the object stops, it returns to its original length.
According to the concept of length contraction, the length of an object as it approaches the speed of light, observed by someone in a different rest frame, contracts or shortens in the direction of motion. When the object slows down and eventually comes to a stop, it is observed to expand back to its original length. The correct phenomenon that occurs is that it is observed as contracting and then expanding back to its original length.
How much heat is needed to raise the temperature of 50.0 g of water from 277 K to 315 K?
Answer:
You will need 7.953 kJ heat energy to raise the temperature of water from 277K to 315K.
Explanation:
To calculate how much heat is needed to raise the temperature of any substance, you need:
The mass of the substance, m, which for you is 50.0 g
The temperature change that occurs, ΔT, which for you is:
Δ[tex]T=(315-277)K=38K[/tex]
The specific heat capacity of the substance, c,
For water, the value of c is 4.186J/gK
Then, this is the equation you need:
[tex]Q=mc[/tex]ΔT
Where Q is the heat needed
So,
[tex]Q=(50.0g)(4.186J/gK)(38K)=7953.4J=7.9534kJ[/tex]
You need 7.953 kJ to raise the temperature of water from 277K to 315K.
The heat required to raise the temperature of 50.0 g of water from 277 K to 315 K is 7964 joules, using the specific heat capacity of water, which is 4.18 J/g°C and the formula Q = mcΔT.
To calculate the amount of heat required to raise the temperature of water, we use the specific heat capacity of water, which is 4.18 J/g°C. The formula we'll use is Q = mcΔT, where Q is the heat energy, m is the mass of the water, c is the specific heat capacity, and ΔT is the change in temperature.
For 50.0 g of water being heated from 277 K to 315 K, the change in temperature (ΔT) is (315 K - 277 K) = 38 K. Since the Kelvin and Celsius scales are offset by a constant but rise at the same rate, an increase of 1 K is equivalent to an increase of 1 °C. Therefore, the heat energy required can be calculated as follows:
Q = mcΔT
Q = (50.0 g) × (4.18 J/g°C) × (38 °C)
Q = 7964 J
Therefore, 7964 joules of heat energy is needed to raise the temperature of 50.0 g of water from 277 K to 315 K.
What are the complementary colors of magenta? Blue? And cyan?
Answer:
Magneta is a mix of blue and red and is a secondary colour.
Explanation:
As we can see green is the complementary colour of Magneta.Complementary colours are the pairs of colours which when combined cancel each other out. This means that when combined they produce a grayscale colour like white or black .
The complementary colors are opposite on the color wheel, with green being the complement of magenta, yellow the complement of blue, and red the complement of cyan.
The complementary colors on a color wheel are those that are directly opposite to each other. When combined in the additive color system, they produce white light. The complementary color of magenta is green, as magenta is a mixture of blue and red, and green is the opposite of that combination on the color wheel. The complementary color of blue is yellow, which is a mixture of red and green. Lastly, the complementary color of cyan, which is a mixture of blue and green, is red.
which of the following solids will have the highest wave speed? one that has a high level of stiffness combines with low density - one that has a low level of stiffness combined with a low-density - one that has high level of stiffness combined with a high density - one that has low level of stiffness combined with a high density.
Answer: The first option (ONE THAT HAS A HIGH LEVEL OF STIFFNESS COMBINED WITH LOW DENSITY)
Explanation: Low density means volume is high compare to mass and stiffness is about hardness
Answer:
One that has a high level of stiffness combined with low density.
Explanation:
Velocity of wave in a solid = √ Y/σ ; Y is young's modulus of elasticity, or stiffness and σ is the density of the solid medium.
immature forms of many animals, like Guinea worms, before they morph into adults
Answer:
True
Explanation: If this is a true or false question it is *T*
The immature forms of animals which they are before metamorphosis are the larva.
Explanation:
The larva in plural form is known as the larvae. The eggs are hatch into the form of larva. These larvae grow in different stages which are marked according to the stages as I or II and so on.
After the larval development, when they are ready to be converted into adults, metamorphosis occurs. This process changes the larva into adults. Here the immature form gets converted into mature adult form.
What organs are involved in caring out these functions?
The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones. It is responsible for our thoughts, feelings, memory storage and general perception of the world.
The human heart is a responsible for pumping blood throughout our body.
The job of the kidneys is to remove waste and extra fluid from the blood. The kidneys take urea out of the blood and combine it with water and other substances to make urine.
The liver has many functions, including detoxifying of harmful chemicals, breakdown of drugs, filtering of blood, secretion of bile and production of blood-clotting proteins.
The lungs are responsible for removing oxygen from the air we breathe and transferring it to our blood where it can be sent to our cells. The lungs also remove carbon dioxide, which we exhale.
Skin is important in creating a physical barrier to protect the body from pathogens.
FOOD PIPE, STOMACH.INTESTINES,ETC..
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An object of mass 80kg moves with a velocity of 4m/s .calculate the kinetic energy of the object
The kinetic energy of an 80kg object moving at a velocity of 4m/s is 640 Joules. This can be calculated using the formula for kinetic energy, which is K = 0.5 × m × v².
Explanation:The kinetic energy of an object can be calculated using the formula K = 0.5 × m × v², where 'K' is the kinetic energy, 'm' is the mass of the object, and 'v' is the velocity of the object. Substituting the provided values into the formula, we have K = 0.5 × 80kg × (4m/s)² = 0.5 × 80kg × 16m²/s² = 640 Joules. Therefore, the kinetic energy of the object is 640 Joules.
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What causes a bolt of lightning
Answer:
The friction between two or more clouds cause them to heat up then it turns to static electricty and then hits the ground i hope you are happy anfd i hope this is correct :)
-Hello There-
This Is A Great Question That You Asked!
Lightning Is Caused When The Upper Clouds Have A Positive Charge And The Lower Clouds Have A Negative Charge. So When The Negative Charge And Positive Charge Meet That Means Lightning Happens Also When This Happens, The Air Separates Into Ions And Electrons.
Have A Great Day!