which of the following is an example of a main sequence star

Answer:

Many tree seedlings crowd the open space and attempt to grow in the sunlight.

Answer:

A

Explanation:

Many tree seedlings crowd the open space and attempt to grown in the sunlight.

Answer: gravity

Explanation:

The force of gravity causes comets to regularly return to the inner solar system after being gone for many years. The gravitational pull of sun is involved in the process.

To know more about gravity

https://brainly.com/question/940770

Conduction

Transfer of heat through soil by the movement of molecules Touching; direct contact

Convection

Warm air in atmosphere rises and is replaced by cooler air

Flow of heat energy through liquids and gases

Warm air circulates toward cooler polar regions.

Radiation

Electromagnetic waves transfer energy through space to Earth

Heat energy on Earth escapes into space

All

Heat energy transferred

Moves from warmer to cooler

Convection & Radiation

Responsible for weather patterns on Earth

Final answer:

Heat from the Sun to the Earth is transferred through space by radiation.

Explanation:

Heat from the Sun to the Earth is transferred through space by radiation. The space between Earth and the Sun is largely empty, so there is no possibility of heat transfer by convection or conduction. The Sun emits electromagnetic waves that are absorbed by the Earth, transferring heat energy.

Radiation is the only possibility for heat to reach Earth because of the distance between the Earth and the Sun. Since the Earth is far away from the Sun, Sun cannot conduct heat to the Earth and the only option is radiation.

All the other options are wrong as per the explaination above.

Answer:

0.7 Cm

Hope this helps you out!

Answer:

677.9 million cm is mars diameter in CM hope this helps

Answer:

The energy becomes 4 times greater.

Explanation:

We know that the energy of a wave is proportional to the square of its amplitude

E ∝ Amplitude^2

Since the original amplitude = 0.5 m

and the new amplitude becomes = 1 m

We are doubling the amplitude. This means that the new energy will be affected by a factor of 4

E_new  ∝ (2*Amplitude)^2  =

E_new ∝ 4*(Amplitude)^2  

E_new  = 4*E

Vibration is a periodic motion that an object makes about an equilibrium position. Objects such as a pendulum or a plucked guitar string demonstrate this. Systems vibrate at their natural frequency, which can be seen when they undergo free or forced vibration.

Vibration can be best described as a type of periodic motion where an object moves to and fro about an equilibrium position. This is prominent in many systems, such as a plucked guitar string or a pendulum swinging. The time to complete one cycle of motion, or one oscillation, is known as the period.

Systems often have a specific frequency at which they naturally oscillate, known as their natural frequency. This natural frequency can be noticed when a system is undergoing free vibration, force vibration, or forced vibrations with damping. An example of this natural frequency can be witnessed in a vibrating string or a pendulum.

Furthermore, much like how waves have fundamentals and overtones, vibrating systems also exhibit these properties. For example, resonances in atoms due to the wave-like nature of their electrons, or the vibrating strings, all show wave characteristics, underlining the applicability of the concept of vibration over a wide range of physical systems.

https://brainly.com/question/23881993

#SPJ11

Answer: C

Explanation:

Calculate EkA -kinetic energy of car A

m=1000kg

Va=16.66 m/s

EkA=m*Va²/2

Eka=(1000kg*277.556m²/s²)/2

Eka=138 777.8 J

Calculate kinetic energy of CarB:

m=2000 kg

Vb=8.33 m/s

Ekb=(m*Vb²)/2

Ekb=(2000kg*69.39m²/s²)/2

Ekb=69 388.9 J

compare Eka with EkB

Eka/Ekb=138 777.8 J/69 388.9

Eka/Ekb=2

The kinetic energy of car A is twice as much as that of car B. This is calculated using the formula for kinetic energy, which is 1/2 * mass * (velocity)^2.

To compare the kinetic energy of car A with that of car B, we first need to understand the mathematical formula for kinetic energy, which is 1/2 * mass * (velocity)^2.

Let's calculate for each car:

Therefore, car A has twice as much kinetic energy as car B.

https://brainly.com/question/26472013

#SPJ3

Answer:

the object of mass 20kg

Explanation:

because the force=massxacceleration

and there is a direct relation between force and mass so the more the mass of the object the greater force it will need to accelerate for example if you tried to push a bike it will be easier than trying to push a truck because of the difference between their masses as the objects of less masses require less forces to move

1) Mass is a measure of how much stuff there is. Weight is a measure of the gravitational force on mass

2) It means "a change in..."

Hope this helps :)

Answer:

c

Explanation:

Mineral water, water, and salt water are all liquid solutions, while oxygen is a gas. Gases are less dense than liquids.

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.

Answer:

C

Explanation:

A good trend line does not connect all the data points (dot-to-dot) but is a best-fit line that represents the overall pattern of the data and can be used for making predictions.

The question asks which of the listed options a good trend line does NOT do. The correct answer is C.) connects all the data points (dot-to-dot). A good trend line is a best-fit line that balances the number of points above and below it, representing the overall pattern of the data points without necessarily passing through all of them. It is used to approximate the average of those points and can be used to make predictions about the data. Connecting all the data points directly, or dot-to-dot, is not a characteristic of a good trend line, as it fails to represent the general trend or pattern in the data accurately.

Answer:(C) is your answer

Explanation: when you swing something back and forth it will eveuntally stopbecause it needs some type of external enegy source or basiclly a push.

I really hope this helps you out if you ever need anything else just friend me or email me :) a brainlist would be greatly appreciated :)

The pendulum bob swings back and forth, but eventually, it stops because there cannot be continued motion without an external energy source. The correct option is C).

The pendulum is a body that is suspended from a fixed point and moves back and forth as a result of gravity. Pendulums are employed to control clock movement because the period—the amount of time between each full oscillation—is constant.

Something that is being swung back and forth eventually comes to a stop because it requires an external energy source, or more simply, a push.

A pendulum is a straightforward illustration of energy transfer since it repeatedly transforms potential energy into kinetic energy until it comes to rest due to the minimal amount of energy lost to heat and air resistance.

Therefore, the correct option is C) There cannot be continued motion without an external energy source.

To learn more about the pendulum, refer to the link:

https://brainly.com/question/14798353

#SPJ2

Answer:

[tex]2.5\cdot 10^{-5}N[/tex]

Explanation:

The force per unit length between two current-carrying wires is given by:

[tex]\frac{F}{L}=\frac{\mu_0 I_1 I_2}{2\pi r}[/tex]

where

[tex]\mu_0[/tex] is the vacuum permeability

[tex]I_1, I_2[/tex] are the two currents

r is the separation between the wires

In this problem, we have

[tex]I_1 =3.55 A[/tex] is the current in the first wire

[tex]I_2 = 2.75 A[/tex] is the current in the second wire

[tex]r=78 mm=0.078 m[/tex] is the separation between the wires

Substituting into the equation, we find

[tex]\frac{F}{L}=\frac{(4\pi \cdot 10^{-7} H/m)(3.55 A)(2.75 A)}{2\pi (0.078 m)}=2.5\cdot 10^{-5}N[/tex]

Answer:

the answer is B

Explanation:

The mass and weight of that object on Mars is .The correct option is

B.

The object experiencing an attraction force towards the another body when placed still on any planet.
The mass of an object is constant on any planet.

Mass of the object on earth = mass of the object on mars = 71kg

The weight is the product of the mass and its acceleration due to gravity.

W=m x g

The acceleration due to gravity on Earth is 10m/s², then the acceleration due to  gravity on Mars is

0.38 x 10 = 3.8m/s²

The weight of that object on Mars is

W =71 x 3.8

W = 269.8 Newtons

The weight is approximately 270 N.

Thus, The mass and weight of that object on Mars is 71 kg and 270 N. The correct option is B.

Learn more about force on gravity.

https://brainly.com/question/13634821

#SPJ2

Answer: Gamma rays

Explanation:

Answer:

Gamma rays are the most powerful

GAMMA RAYS

Gamma-rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Gamma-rays can be used to treat cancer, and gamma-ray bursts are studied by astronomers.

Electromagnetic (EM) radiation is transmitted in waves or particles at different wavelengths and frequencies. This broad range of wavelengths is known as the electromagnetic spectrum. The spectrum is generally divided into seven regions in order of decreasing wavelength and increasing energy and frequency. The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma-rays.

Gamma-rays fall in the range of the EM spectrum above soft X-rays. Gamma-rays have frequencies greater than about 1,018 cycles per second, or hertz (Hz), and wavelengths of less than 100 picometers (pm), or 4 x 10^9 inches. (A picometer is one-trillionth of a meter.)

Gamma-rays and hard X-rays overlap in the EM spectrum, which can make it hard to differentiate them. In some fields, such as astrophysics, an arbitrary line is drawn in the spectrum where rays above a certain wavelength are classified as X-rays and rays with shorter wavelengths are classified as gamma-rays. Both gamma-rays and X-rays have enough energy to cause damage to living tissue, but almost all cosmic gamma-rays are blocked by Earth's atmosphere.

The answer is:

The kinetic energy of the object is equal to 85 J.

The kinetic energy involves the speed and the mass of an object in motion. We can calculate the following the work needed to speed an object (kinetic energy) using the equation:

[tex]KineticEnergy=\frac{1}{2}mv^{2}[/tex]

Where,

m, is the mas of the object

v, is the speed of the object.

Now, we are given:

[tex]mass=m=6.8kg\\speed=v=5\frac{m}{s}[/tex]

So, substituting and calculating the kinetic energy of the object, we have:

[tex]KineticEnergy=\frac{1}{2}*6.8kg*(5\frac{m}{s})^{2}[/tex]

[tex]KineticEnergy=\frac{1}{2}*6.8kg*(25\frac{m^{2}}{s^{2}})[/tex]

[tex]KineticEnergy=\frac{1}{2}*170kg\frac{m^{2}}{s^{2}}[/tex]

[tex]KineticEnergy=85kg\frac{m^{2}}{s^{2}}=85J[/tex]

We have that the kinetic energy of the object is equal to 85 J.

Have a nice day!

Answer:

its 85j

Explanation:

just took the test

Answer:

the answer will be C.  4 degrees C

Explanation:

you subtract base meters from peak meters to get 4 meters; then Multiply 6.5 by 4.

Then subtract that total from 30 degrees C

***as altitude increases, temperature decreases***

To find the temperature at the peak 7,000 meters high when starting from 3,000 meters, multiply the altitude change (4 km) by the lapse rate (6.5 degrees C) to get a temperature decrease of 26 degrees C. Subtract that from the starting temperature (30 degrees C) to get 4 degrees C as the temperature at the peak.

To calculate the air temperature at the peak of a mountain when you ascend from 3,000 meters to 7,000 meters, use the standard lapse rate. The lapse rate is the rate of temperature decrease with altitude, typically around 6.5 degrees C for every 1,000 meters. Since you are ascending 4,000 meters (7,000 - 3,000 meters), multiply the lapse rate by the number of kilometers:

Lapse Rate: 6.5 degrees C/km
Altitude Change: 4 km (4,000 meters / 1,000 meters per km)

Multiply the lapse rate by the altitude change:
6.5 degrees C/km * 4 km = 26 degrees C

Now, subtract this number from the starting temperature at 3,000 meters:

Starting Temperature: 30 degrees C
Temperature Decrease: 26 degrees C
30 degrees C - 26 degrees C = 4 degrees C

Therefore, the air temperature at the peak, 7,000 meters, would be 4 degrees C.

Answer: 94%

Explanation: If the work put into a lever is 930 joules and the work accomplished is 870 joules, the efficiency of the lever is 94%.

870/930=93.5

And rounded you get 94.

If the work put into a lever is 930 joules and the work accomplished is 870 joules, the efficiency of the lever is 94%.

Explanation:

The work put into the lever, input power of the lever = 930 joules

Work accomplished, output power of the lever = 870 joules.

Efficiency = output power / input power in terms of percentage.

Efficiency = 870 / 930 = 0.935.

Efficiency in terms of percentage = 0.935 * 100 = 94%

Therefore, efficiency of the lever = 94%.

Usually just the lower-case Greek letter alpha.

I'll type it here, and hope Brainly can handle it:

Small Greek Alpha ==> α

α is the  symbol represents an alpha particle in nuclear equations

Nuclear equations represent the reactants and products in radioactive decay, nuclear fission, or nuclear fusion.

Alpha particle in nuclear equation

42 He 24He or 42α

so the symbol of alpha particle in nuclear equations is

α

learn more about  nuclear equations:

https://brainly.com/question/19752321?referrer=searchResults

#SPJ2

Answer:

The correct answer is 0,2 rems

Explanation:

People are exposed to natural sources of radiation all the time. According to recent estimates, the average person in the United States receives an effective dose of approximately 3 mSv per year of natural radiation, which is equivalent to 0.3 rems. This amount includes cosmic radiation from outer space and is average because it varies depending on the region people are in.

The amount of radiation for a chest x-ray of an adult (0.01 rems) is approximately equal to 10 days of natural radiation to which we are all exposed every day.

Have a nice day!

Answer: 0.2 rems

Explanation:

Answer:

If the force remains the same, the acceleration would decrease

Explanation:

According to Newton's second law, the acceleration of an object is given by

[tex]a=\frac{F}{m}[/tex]

where

F is the force applied to the object

m is the mass of the object

As we see from the formula, the acceleration a is inversely proportional to the mass, m. Therefore, if the force F remains constant, this means that if the mass of the skateboarder increases, then the acceleration will decrease.

Answer: His acceleration would decrease

Explanation:

ur answer is A or also known as

When you push a child on a swing, you are doing work on the child because  you are pushing against the force of gravity

hope this helps :)

Thinking it’s A! Sorry if I’m wrong! :)

Answer:

600Hz

Explanation:

In electrical systems of alternating current, the harmonics are, as in acoustics, frequencies multiples of the fundamental working frequency of the system and whose amplitude decreases as the multiple increases. For example, if we have systems fed by the 50 Hz network, harmonics of 100, 150, 200, etc. may appear.

In our case having a fundamental wave of 100Hz, I can have harmonics of 200,300,400, ..., 600Hz

600 meters / second squared

To calculate the acceleration of the projectile that goes from 0 to 300 m/s in 0.5 seconds, we can use the formula for acceleration (a) which is the change in velocity (Δv) divided by the time (Δt) it takes for that change:

a = Δv / Δt
Here, Δv = final velocity - initial velocity
         Δv = 300 m/s - 0 m/s = 300 m/s, and
         Δt = 0.5 seconds.

So, the acceleration of the projectile would be:
a = 300 m/s / 0.5 s = 600 m/s2

Thus, the projectile is accelerated at a rate of 600 meters per second squared.

The most likely names of the plant groups are seed producers and spore producers, corresponding to gymnosperms and angiosperms. These categories reflect the major divisions of vascular plants based on their reproductive strategies, with gymnosperms producing seeds in cones and angiosperms producing seeds in flowers.

The most likely names of the groups into which a scientist classifies some plants are seed producers and spore producers. This categorization aligns with the major division of plants into nonvascular and vascular plants, where vascular plants are further divided into seedless and seed plants. Seed plants are subsequently categorized into gymnosperms, which produce seeds in cones and include conifers, and angiosperms, which produce seeds in the ovaries of flowers and include a wide range of flowering plants.

Gymnosperms, like pines, firs, and spruces, are characterized by their needle-like leaves and cone production, whereas angiosperms encompass a broad variety of plants including broadleaved trees, vegetables, grasses, and floral species admired for their blossoms. The distinction between these two groups lies in their reproductive strategies—the presence of cones in gymnosperms and the production of flowers and encased seeds in angiosperms.

Answer:

14108 J

Explanation:

The heat that has to be removed from the water is given by

[tex]Q=m C_s \Delta T[/tex]

where

m = 225 g is the water mass

[tex]C_s = 4.18 J/gC[/tex] is the specific heat capacity of the water

[tex]\Delta T=10.0 C-25.0 C=-15.0 C[/tex] is the charge in temperature of the water

Substituting into the equation, we find

[tex]Q=(225 g) (4.18 J/gC) (-15.0 C)=-14,108 J[/tex]

and the negative sign means the heat is removed from the system.

Answer:

I think jupiter is a gas giant

Explanation:

Jupiter, a gas giant in the outer planets, is not a terrestrial planet. Because of their solid, rocky surfaces, Mercury, Venus, Earth, and Mars are terrestrial planets.

Third option is correct.

Terrene planets are those that are closer to the sun and have solid, stony surfaces on their surfaces. They are primarily made up of rocks that are composed of silicates and metals. Mercury, Venus, Earth, and Mars are the four planets that make up our solar system that are classified as terrestrial.

On the other hand, Jupiter is a gas giant and is classified as one of the outer planets, which are also referred to as the Jovian planets. It is almost entirely made up of hydrogen and helium, and it does not have a surface that is solid. Jupiter is not like any of the planets that are found in our solar system because of its enormous size and mass.

Jupiter's Great Red Spot, a massive storm that has raged for aeons, is a famous feature. It has many moons and a complicated ring system. Jupiter resembles Saturn, Uranus, and Neptune due to its large size and gaseous composition. Terrestrial planets are tiny and made of stone.

To know more about solar system

https://brainly.com/question/28430876

#SPJ6

Answer:

A medium with a frequency of 3 Hz and a wavelength of 5 m

Explanation:

The velocity of a wave can be found by using the formula:

[tex]v=f\lambda[/tex]

where

f is the frequency

[tex]\lambda[/tex] is the wavelength

Let's apply this formula to calculate the velocity of each wave:

A medium with a frequency of 4 Hz and a wavelength of 3.5 m:

[tex]v=(4 Hz)(3.5 m)=14 m/s[/tex]

A medium with a frequency of 3 Hz and a wavelength of 5 m :

[tex]v=(3 Hz)(5 m)=15 m/s[/tex]

A medium with a frequency of 4 Hz and a wavelength of 3 m :

[tex]v=(4 Hz)(3 m)=12 m/s[/tex]

A medium with a frequency of 5 Hz and a wavelength of 2 m:

[tex]v=(5 Hz)(2 m)=10 m/s[/tex]

So, we see that the wave with the greatest velocity is the 2nd one.

Hello There!

It's a Property of matter where atoms in an object are aligned into domains