Answer:
The correct answer is option C.
Explanation:
The layer below the lithosphere , the upper layer of the mantle of the earth with high heat pressure .It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks.This is because in some regions there can be presence of molten rocks.
Answer:
C.
Explanation:
A scientist classifies some plants into two groups
Which are MOST LIKELY the names of the groups?
A. trees, ferns
B. seed producers, spore producers
C. deciduous trees, coniferous trees
D. flowering plants, coniferous trees
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.
Explanation: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.
Why are plane mirrors and convex mirrors unable to form real images?
A. They cannot reflect light.
B. They cannot make light rays converge.
C. They both show only small views of images.
Answer:
B. They cannot make light rays converge.
Explanation:
Real images are defined as the image in which light rays will converge at a point after reflection through the mirror
if the light rays converge and meet at a point in front of mirror then the point of convergence is known as real image
while if the light rays will not converge and the light will diverge after reflection through the mirror then it will appear to meet at a point behind the mirror
this imaginary point is known virtual image
so here in case of plane mirror and convex mirror the light rays will not converge at a point after reflection through the mirror
so it can not form real images
so correct answer will be
B. They cannot make light rays converge.
A good trend line does NOT do which of the following
A.) is a best-fit line (through the center of the data points)
B.) represents the overall pattern of the data points
C.) connects all the data points (dot-to-dot)
D.) can be used to make predictions
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.
Each year, an average person in the United States is exposed to a radiation level of _____.
2 rems
200 rems
0.2 rems
20 rems
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:
Mars Scaled Diameter of planets (cm)
Answer:
0.7 Cm
Hope this helps you out!
Answer:
677.9 million cm is mars diameter in CM hope this helps
A person with a mass of 15kg is walking uphill at a velocity of2m/s. What is the walker's momentum?
Answer:
30 kgm/s
Explanation:
The momentum of a body is given by the product of mass and its velocity.
∴ momentum = mv
= 15 × 2
= 30 kgm/s
The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume. Together these two gases make up approximately 99% of the dry atmosphere. Why are these gases important?
A) They are essential to life on Earth.
B) They have a great influence on climate.
C) They absorb ultraviolet radiation from the sun.
D) They increased over time causing global warming.
Answer:
the answer is A. they are essential to life on Earth
Explanation:
Answer: the answer is a
Explanation:
because that is how we live
Two long straight wires are parallel to each other and are separated by 78 mm. The current in wire 1 is 3.55 A and the current in wire 2 is 2.75 A. What is the force per unit length between the two wires?
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]
The electromagnetic wave that CT scans are based on is called
Answer:
X-rays
Explanation:
Electromagnetic waves are wave that do not require a material medium for transmission and they travel with a speed of light,Electromagnetic waves have a wide range of applications in medicine, for example use of x-rays in medicine in CT scans.CT scans uses X-rays to produce a cross-sectional image of the body or the part of the tissue being studied using x-rays and a computer.in 0.5 seconds,a projectile goes from 0 to 300m/s what is the acceleration of the projectile
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.
in which object more force has to be applied to move in between two object of mass 20 kg and other of mass 2 kg placed at rest at the same time?why?
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
An ecologist studies a forest area for evidence of competition among organisms. She chooses a specific location where a tree was struck by lightning. The lightning strike caused the tree to fall over, leaving a space in the tree canopy for light to pass through. Which of these observations provides the best evidence of competition?
Many tree seedlings crowd the open space and attempt to grow in the sunlight.
Snakes come into the open space and eat small rodents that can easily be spotted in the sunlight.
Termites, with microorganisms in their stomachs to help them digest wood, are found on the fallen tree.
A type of plant, called a bromeliad, grows in the branches of the fallen tree and continues to survive even though the tree has fallen
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.
What is the resultant acceleration?
A option is the right option
Answer: The sum of all the acceleration vectors. Hope this helps. :)
Explanation:
As you climb a mountain, you can expect the air temperature to decrease by 6.5 degrees C for every 1000 meters you ascend. This is called the standard (average) lapse rate. If your went hiking and started out at 3,000 meters, with the air temperature at 30 degrees C; what would the air temperature be like at the peak- 7,000 meters?
a. -4 degrees C
b. 0 degrees C
c. 4 degrees C
d. 6.5 degrees C
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.
In which medium do the waves travel with the greatest velocity? *
A medium with a frequency of 4 Hz and a wavelength of 3.5 m
A medium with a frequency of 3 Hz and a wavelength of 5 m
A medium with a frequency of 4 Hz and a wavelength of 3 m
A medium with a frequency of 5 Hz and a wavelength of 2 m
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.
A positive charge of +0.300 c moves horizontally due +x at speed of 250 m/s. It entered a magnetic field direction of -y with a magnitude of 0.400 T. What is the magnitude and direction of the force on the charge?
Answer: The direction of the magnetic field of a large magnet is toward you. ... Q: 650 kg cart is moving along a roller coaster track at 3.50 m/s at ... Q: Lab 8- Magnetic Fields: solenoids, forces on charged particles and ..... Q: Problem 7 A uniform magnetic field of magnitude 0.173 T is directed along the positive x axis.
Explanation:
The magnitude and direction of the force on the charge will be 30 N towards the +x direction.
What is Lorentz force?Lorentz's force is defined as the force acting on a point charge when it is moving in an electric and magnetic field. Under the electric and magnetic field, a force is to act on the charge, known as the Lorentz force.
The given data in the problem is ;
q is the value of charge = +0.300 c
B is the magnetic field strength = 0.400 T.
v is the velocity of moving charge = 250 m/s.
Mathematically, the Lorentz force is given by;
[tex]\rm F=qvB \\\\ F= 0.300 \times 250 \times 0.400 \\\\ F= 30 \ N[/tex]
Hence, the magnitude and direction of the force on the charge will be 30 N towards the +x direction.
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What is a satellite
Answer:
an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
Explanation:
Look it up on google
Answer:
A satellite is an artificial body put in orbit around the earth or another planet in order to collect information or for communication.
A satellite could also be a celestial body orbiting the Earth or another planet.
What is the difference between three types of mechanical waves?
Answer:
In longitudinal waves, particles travel in the direction parallel to that of the wave motion where as in transverse waves, particles move perpendicular to the direction of the wave motion and in surface waves, particles in the medium move in a circular motion.A good example of longitudinal waves is sound waves. Vibrating a string on the ground can serve as an example of transverse wave.For surface waves, the ocean waves travelling on the surface can illustrate the cicular movement of particles in the water.
Answer:
There are three kinds of mechanical waves depending upon the direction in which they travel or propagate through the medium.
(i) Longitudinal waves
(ii) Transverse waves
(iii) Surface waves
In transverse waves, the particles tend to move in a direction at right angles to the waves whereas in longitudinal waves, they move in parallel direction to each other. When it comes to surface waves they lie in circular motion.
The pendulum bob is dropped from point A and swings to point C. The pendulum bob swings back and forth but eventually it stops. Why?
A) All the potential energy is converted to kinetic energy.
B) The external energy source is less than the friction force.
C) There cannot be continued motion without an external energy source.
D) All the kinetic energy is converted to potential energy or energy of position.
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).
What is a pendulum?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.
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A skateboarder is accelerating forward. How would his acceleration change if he had more mass?
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:
Which symbol represents an alpha particle in nuclear equations?
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
What is a nuclear equation ?
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
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Which of the following substances is a compound?
A.
solid bronze (an alloy of copper and tin)
B.
a salt water solution
C.
solid iron metal (Fe)
D.
hydrogen sulfide gas (H2S)
Answer:
D. hydrogen sulfide gas (H2S)
Explanation:
A compound is composed of two or more elements chemically bound together.
In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.
Answer:
D. hydrogen sulfide gas (H2S)
Explanation:
A compound is composed of two or more elements chemically bound together.
In this case, hydrogen is chemically bounded with sulfur to form a gaseous compound called hydrogen sulfide.
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Explanation:
A missile is fired from a jet flying horizontally at Mach 2 (2200 ft/s). The missile has a horizontal acceleration of 1000 ft/s2. Calculate its horizontal velocity at 10.0 seconds after it is fired. (Assume constant acceleration of the missile throughout its flight.) 12,200 ft/s 10,000 ft/s 2300 ft/s 7800 ft/s
Answer:
12200 ft/s
Explanation:
The question is on constant acceleration
→Uniform acceleration motion is given by⇒⇒⇒ Vf=Vo+ at..............(a)
→Where Vf= final velocity=?
Vo=initial velocity =2200 ft/s
a= acceleration= 1000ft/s²
t= 10.0 sec
Substitute values in (a) above
Vf=Vo+ at
Vf= 2200 + ( 1000×10) = 12200 ft/s
Answer:
12,200
Explanation:
got it right on odessyware
Which of the following forces causes comets to regularly return to the inner solar system after being gone for many years? A. friction B. electromagnetic force C. magnetism D. gravity
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.
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Which best describes vibration
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.
Explanation: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.
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Select the temperature scale that matches each boiling point for water. Water boils at 373 . Water boils at 100 . Water boils at 212
degrees Celsius
Degree Fahrenheit
Kelvins
Answer:
100 degree Celsius
373 Kelvin
212 Fahrenheit
Explanation:
The boiling point of water on celsius scale is 100 degree C.
Convert 100 degree C into kelvin
C = K - 273
100 degree C = 100 + 273 = 373 K
Convert 100 degree C into degree F
C = 5 / 9 ( F - 32)
F = 9 / 5 x 100 + 32 = 212
Water boils at 373
✔ kelvins
.
Water boils at 100
✔ degrees Celsius
.
Water boils at 212
✔ degrees Fahrenheit
.
f the work put into a lever is 930 joules and the work accomplished is 870 joules, the efficiency of the lever is _____
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%.
How does the heat move through the space between the Sun and the Earth? Match the heat transfer mechanisms in space and on Earth with the correct description.
the choices are
1. electromagnetic waves transfer energy through space to Earth
2. heat energy on Earth escapes into space
3. moves from warmer to cooler
4. touching, direct contact
5. warm air circulates towards cooler polar regions
6. flow of heat energy through liquids and gases
7. heat energy transferred
8. responsible for weather patterns on Earth
9. transfer of heat through soil by the movement of molecules
10. warm air in atmosphere rises and is replaced by cooler air
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.
Which is not a terrestrial planet? Mars Earth Jupiter Mercury
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.
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When you push a child on a swing, you are doing work on the child because _____.
A. you are pushing against the force of gravity
B. you are allowing the child to continue swinging
C. the child is moving at a constant velocity
D. the child is moving in the direction you are pushing
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! :)