if you leave home at 1:00 and get to your friends house at 5:00, what was the average speed?
Which of the following statements is true? A. The Earth has evolved over time. B. The Earth's surface has not changed over time. C. The Earth is exactly the same as it was millions of years ago. D. The Earth's continents have not changed over time, but some islands have formed.
A. The Earth has evolved over time
how did napoleon raise soldiers for hi army
which of these would most likely change if the Earth's orbit around the sun becomes more rounded?
a) tilt of Earth
b) global climate
c) length of days
d) length
Answer:
b) global climate
Explanation:
Earth's orbit around the sun is elliptical. This means, in some part of the year, the earth is closer to sun than others. This effects the global climate. A difference of about 5 degree in temperature occurs when the earth is closest and farthest from the sun. If the orbit is more rounded, the global climate would most likely change. It become more uniform.
Waves transfer energy. What have you observed about light, sound, or water that could support this claim?
Light, sound, or water support the claim that waves transfer energy. The speed of light and sound is the same in some cases.
What is a wave?A wave is a phenomenon that flows across a material medium without leaving any lasting mark. Mechanical or electromagnetic waves can be used to classify them. Transverse and longitudinal are the two main forms.
Waves transfer energy by causing particles to vibrate, yet the particles themselves travel in a perpendicular direction to the wave's horizontal movement.
As the particles travel from rest to movement and back to rest, energy is changed between potential and kinetic energy.
Hence light, sound, or water support the claim that waves transfer energy.
To learn more about the wave refer to the link;
brainly.com/question/3004869
#SPJ3
What are sun spots??????????
The surface of the Sun has dark areas called sunspots. They are cooler than the hot, yellow areas. Sunspots were discovered by the astronomer Galileo Galilei. Some sunspots can last weeks or even months.
A student needs help completing an energy transfer diagram for a ceiling fan. Which BEST fills in the blanks labeled M and N to describe the transfer of energy?
A)N: Electrical and M: Potential energy B)N: Light energy and M: Electrical energy C)N: Electrical energy and M: Kinetic energy D)N: Mechanical energy and M: Electrical energy
Answer: C) N: Electrical energy and M: Kinetic energy
Explanation:
Why does green light slow down more than orange light does when passing through an object?
Answer:
Green light has smaller wavelength than that of orange light.
Explanation:
The wavelength of green light is 510 nm ,while that of orange light is 590 nm.
According to equation
v=f*λ
v∞λ
velocity or speed is directly proportional to wavelength,hence green slows more than orange light because wavelength of green light is smaller than that of orange light.
a wind blowing across the ocean will create a current in which direction? also not sure on the subject thing for this
Answer:
The water starts flowing in the same direction as the wind.
A 100 kg roller coaster car is located at the top of a hill where the height is 20 m. What is the velocity when it reaches the bottom of the hill? 5.5 m/s 11.2 m/s 16.7 m/s 19.8 m/s
Answer:
19.8 m/s
Explanation:
Assuming the car starts from rest, initially when it is at the top of the hill all the mechanical energy of the car is just potential energy, given by:
[tex]U=mgh[/tex]
where
m = 100 kg is the mass
g = 9.8 m/s^2 is the gravitational acceleration
h = 20 m is the height
Substituting,
[tex]U=(100 kg)(9.8 m/s^2)(20 m)=19,600 J[/tex]
At the bottom of the hill, all this energy has been converted into kinetic energy (because energy cannot be created or destroyed, but only transformed). Therefore, the kinetic energy of the car is:
[tex]K=\frac{1}{2}mv^2=19,600 J[/tex]
where
m = 100 kg is the mass of the car
v is the speed of the car at the bottom of the hill
Re-arranging this equation, we can find the value of v:
[tex]v=\sqrt{\frac{2K}{m}}=\sqrt{\frac{2(19,600 J)}{100 kg}}=19.8 m/s[/tex]
Which of these is true of an inelastic collision between two objects in a closed system but not of an elastic collision? Total momentum is conserved. Total kinetic energy is conserved. Kinetic energy is less after the collision. Total momentum is not conserved.
In an inelastic collision within a closed system, the kinetic energy is less after the collision whereas the total momentum remains conserved.
Explanation:The true statement about an inelastic collision between two objects in a closed system, but not of an elastic collision, is that kinetic energy is less after the collision. In an inelastic collision, kinetic energy is not conserved because some of the kinetic energy may be converted into other forms such as thermal energy or potential energy. However, total momentum is conserved in both elastic and inelastic collisions, as long as the net external force on the system is zero.
Learn more about Inelastic Collision here:https://brainly.com/question/24616147
#SPJ6
What is the relationship between wind and ocean waves
Explanation:
Wind waves are the surface waves that occurs on the free surface of water. They result from wind blowing over an area of the surface of water.
The energy is transferred from the wind in waves across the ocean.
Wave height of the ocean is affected by wind speed. If the speed of the wind is slow then only small waves will occur.
When wind moves at high speed then it transfers more energy to the water. It will result in stronger waves.
Answer:I think the answer is Wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.
Explanation: Because wind transfers energy to the ocean, if there are faster winds, more winds transfers more energy to the water.
A tiger started running when it saw a deer running at uniform velocity 2m/s at 15m far from it ..if the tiger ran at acceleration 2m/s^2..when and where did the tiger catch the deer?
which is an angiosperm. A.fern B.moss C.pine D.tulip
What energy transformations occur in a tv remote?
Ex: for a battery in a flashlight it's chemical energy to electrical energy to light energy
Pressing the button: Mechanical to electrical
Waste energy from this step: Mechanical to heat
Converting electrical signal to IR: electrical to electromagnetic (infrared rays)
Waste energy from this step: electrical to heat
Chemical energy from battery: chemical to electrical
Two negative charges that are both -3.0 C push each other apart with a force of 19.2 N. How far apart are the two charges ?
The distance between the two charges is approximately 64828.5 m (or about 64.8 km).
To find the distance between two charges that exert a given force on each other, we use Coulomb's Law, which states:
[tex]\[ F = k_e \frac{|q_1 q_2|}{r^2} \][/tex]
Where:
F is the force between the charges,
[tex]k_e[/tex] is Coulomb's constant [tex](\(8.99 \times 10^9 \, \text{N} \cdot \text{m}^2/\text{C}^2\))[/tex],
[tex]q_1[/tex] and [tex]q_2[/tex] are the magnitudes of the charges,
r is the distance between the charges.
Given data:
[tex]\( q_1 = q_2 = -3.0 \, \text{C} \)[/tex]
F = 19.2 N
We need to find (r).
1. Insert the known values into Coulomb's Law:
[tex]\[ 19.2 = \left(8.99 \times 10^9 \right) \frac{|-3.0 \times -3.0|}{r^2} \][/tex]
2. Simplify the charges:
[tex]\[ 19.2 = \left(8.99 \times 10^9 \right) \frac{9.0}{r^2} \][/tex]
[tex]\[ 19.2 = 8.99 \times 10^9 \times \frac{9.0}{r^2} \][/tex]
[tex]\[ 19.2 = 80.91 \times 10^9 \times \frac{1}{r^2} \][/tex]
[tex]\[ r^2 = \frac{80.91 \times 10^9}{19.2} \][/tex]
[tex]\[ r^2 = 4.21 \times 10^9 \][/tex]
[tex]\[ r = \sqrt{4.21 \times 10^9} \][/tex]
r = 64828.5 m or 64.8 km
Which term is defined as the change in the direction of light when it goes from one medium into a different medium? Question 2 options: Diffraction Absorption Reflection Refraction
Which diagram BEST represents the light waves of a bright red brake light on the left side to a dim violet night light on the right side?
A)
B)
C)
D)
Diagram-A does.
The left side has high amplitude (bright) and long wavelength (red).
The right side has low amplitude (dim) and short wavelength (violet).
Diagram-A does. The left side has high amplitude (bright) and long wavelength (red). and The right side has low amplitude (dim) and short wavelength (violet).
What are light waves?Waves of light emerge from a source. Both an electric and a magnetic component make up each wave. Because of this, light is also known as electromagnetic radiation.
Our brains interpret light waves by assigning different colors to the different wavelengths, but much of the light in the Universe travels with wavelengths too short or too long for the human eye to detect.
The longest wavelengths are the infrared, microwave, and radio portions of the spectrum. The shortest wavelengths of the spectrum are the ultraviolet, x-ray, and gamma radiation.
Therefore, Diagram-A does. The left side has high amplitude (bright) and long wavelength (red). and The right side has low amplitude (dim) and short wavelength (violet).
To learn more about Waves, refer to the link:
https://brainly.com/question/29334933
#SPJ2
true or false a 6 volt battery has a greater electric potential difference than a 1.5 volt battery
An igneous rock sample is about 250,000 years old. Would you use uranium-lead radiometric dating to find its age?
Which fact is NOT true about gravity?
A. Gravity depends on distance.
B. Gravity depends on weight.
C. Gravity depends on mass.
D .The force of gravity between two objects will never be 0.
Which of the following describes how the Mid-Atlantic Ridge formed on Earth at a divergent plate boundary?
Plates moved in closer
Plates slid past each other
Plates moved with each other in the same direction
Plates moved apart
Answer:
Plates moved apart
Explanation:
Answer: Plates moved apart
Explanation:
Its a divergent boundary and that's what happens at divergent boundaries
When is the net force on an object equal to zero?
Which of the following correctly describes the state of matter of one of the samples? A is a solid because its volume is equal to the volume of the containers. B is a gas because its volume is less than the volume of the containers. B is a solid because it contracts as the containers change. A is a gas because it contracts as the containers change.
Sample A could potentially be a solid since it has the same volume as the container, and solids have a definite volume. However, the volume of a gas can also equal the volume of its container because gases fill the space available to them, so B is not necessarily a gas just because its volume is less than that of its container. The behavior of the samples when the container changes are not specific properties of solids or gases.
Explanation:The question is asking about how to identify the states of matter of different samples based on their properties. In this case, the statements 'A is a solid because its volume is equal to the volume of the containers' and 'B is a gas because its volume is less than the volume of the containers' might be confused. Here is why: solids, liquids, and gases are different states of matter that exist. Solids have definite shape and volume, regardless of their containers. This means sample A could indeed be a solid if its volume equals the volume of the container. However, the volume of a gas is not necessarily less than the volume of its container.
Gases actually take the shape and volume of their containers, so a gas could fill the entire volume of its container if allowed. Neither of the statements 'B is a solid because it contracts as the containers change' and 'A is a gas because it contracts as the containers change' are necessarily true, as contracting is not a specific property of either solids or gases. Without more specific information about these samples, it's difficult to definitively identify their state of matter based on the provided descriptions.
Learn more about States of Matter here:https://brainly.com/question/29476563
#SPJ3
A rigid tank of air is cooled (temperature decreased). The volume has to remain constant because it is a rigid tank. The air pressure in the rigid tank
A. Increases B. Decreases C. Stays the same
The air pressure in the rigid tank Decreases.
Explanation:
A rigid tank is said to be a region where volume is always considered as a constant. During the process of cooling the rigid tank where the temperature is said to be decreased, the effect of air pressure in the tank also decreases.
Because, PV = RT, where P is the pressure, T is temperature, R is constant, V is the volume. Hence pressure is directly proportional to temperature.
HELP RIGHT NOW THE RIGHT ANSWER GETS BRAINLEST!!!
Match the term to its description.
Match Term Definition
Prominences A) Brief eruptions of intense high-energy radiation from the sun's surface
Solar flares B) The rise of hotter, less dense fluid and the sinking of cooler, denser fluid
Sunspots C) Streams of glowing gas that shoot out from the sun in an arch
Convection D) Dark spots appearing from time to time on the sun's surface
The sun stands at the center of the solar system and all other celestial bodies have their places around the sun.
What is the sun?The sun stands at the center of the solar system and all other celestial bodies have their places around the sun.
The following are the accurate matches of the descriptions as shown in the question.
Solar Flares: Streams of glowing gas that shoot out from the sun in an archProminences: Brief eruptions of intense high-energy radiation from the sun's surfaceSun Spots: Dark spots appearing from time to time on the sun's surfaceConvection: The rise of hotter, less dense fluid and the sinking of cooler, denser fluidLearn more about the sun:https://brainly.com/question/17376727
#SPJ2
Chemical properties of a base include...
Increases the concentration of hydroxide ions when added to water, feels slippery, and forms salt when added to an acid.
Increases the concentration of hydrogen ions when added to water, reacts with metal to form hydrogen gas, and forms salt when added to an acid.
Increases the concentration of hydroxide ions when added to water, reacts with many oils and fats, and forms salt when added to an acid.
Increases the concentration of hydroxide ions when added to water, reacts with many oils and fats, and tastes bitter.
Bases are substances that increase the concentration of hydroxide ions in water. They dissolve and dissociate to release hydroxide ions, and have properties such as feeling slippery and forming salts when added to acids.
Explanation:Bases are substances that increase the concentration of hydroxide ions (OH-) in water. They do not react chemically with water but dissolve and dissociate, releasing hydroxide ions into the solution. Bases can be identified by their properties, such as feeling slippery, forming salts when added to acids, and increasing the concentration of hydroxide ions in water.
For example, when sodium hydroxide (NaOH) dissociates in water, it releases Na+ and OH- ions:
NaOH(s) → Na+ (aq) + OH- (aq)This dissociation process is complete for ionic hydroxides like NaOH, making them strong bases.
As a transverse wave travels through a medium, it displaces the particles:
1. perpendicular to the motion of the wave.
2. vertically along the same plane as the wave.
3. parallel to the direction of the wave motion.
4.horizontally along the plane that the waves travels.
Question 2. As a longitudinal wave travels through a medium, it displaces the particles
1.parallel to the direction which the wave travels.
2.along the opposite plane of travel.
3.vertically along the direction that the wave travels.
4.perpendicular to the path of travel.
Answer:
Transverse wave: 1. perpendicular to the motion of the wave
Longitudinal wave: 1.parallel to the direction which the wave travels.
Explanation:
Waves are periodic oscillations that carry energy withouth transporting matter.
Depending on the direction of the oscillation, there are two types of waves:
- Transverse waves: in transverse waves, the direction of the oscillation is perpendicular to the direction of motion of the wave. Examples of transverse waves are electromagnetic waves (which consist of oscillating electric and magnetic fields that vibrate perpendicularly to the direction of motion of the wave)
- Longitudinal waves: in longitudinal waves, the direction of the oscillation is parallel to the direction of motion of the wave. Examples of longitudinal waves are sound waves (which consist of periodic vibrations of the particles of a medium, such as air. The vibrations create regions of higher density of particles, called compressions, and regions of lower density of particles, called rarefactions).
Answer:
Transverse wave : perpendicular to the motion of the wave.
Longitudinal wave : parallel to the direction which the wave travels.
Explanation:
(a) As a transverse wave travels through a medium, it displaces the particles perpendicular to the motion of the wave. It travels in the form of crest and trough. Electromagnetic wave is an example of transverse wave.
(b) As a longitudinal wave travels through a medium, it displaces the particles parallel to the direction which the wave travels. It travels in the form of compression and rarefaction. Sound wave is an example of longitudinal wave.
a physical anthropologist studies the of human remains
Answer:
True
Explanation:
They study human forms.
the particles of an object are packed tightly together and are vibrating. when the object is heated, the particles start to move faster and slide past each other. this is an examples of