Answer:
Explanation:
Why does the moon appear to change its shape as seen from Earth
Why are images reflected from a rough surface not as clear as those reflected from a smooth
surface?
Answer:
Just as images are reflected from the surface of a mirror, light reflected from a smooth water surface also produced a clear image. ... Consequently, the outgoing rays are reflected at many different angles and the image is disrupted. Reflection from such a rough surface is called diffuse reflection and appears matte.
Explanation:
hi po I hope it's help you
Some students found this information about an energy saving lamp and a filament lamp that give out almost the same amount of light.
Describe the advantages and disadvantages of each type of lamp.
Answer:
By replacing your home's five most frequently used light fixtures or bulbs with models that have earned the ENERGY STAR, you can save $75 each year.
Compared to traditional incandescents, energy-efficient lightbulbs such as halogen incandescents, compact fluorescent lamps (CFLs), and light emitting diodes (LEDs) have the following advantages:
Typically use about 25%-80% less energy than traditional incandescents, saving you money
Can last 3-25 times longer.
what type of particle carries an electric current through a wire
Skyscrapers are made of concrete and glass, concrete and glass are made of sand,so that makes skyscrapers giant sandcastles. Change my mind
Awnswer:
what are the answer chosices
Explanation:
Question 4 (1 point)
A golf ball is suspended by a cord held in a golfers hand. The reaction to the force of
gravity on the golf ball is the force exerted by
Answer:
The force of the golf ball on Earth!
Explanation:
Action/Reaction Pairs work like this:
Earth on Golfball, Golfball on Earth.
Use Gauss's Law to find the electric field produced by an infinite plane of uniformly distributed charge Q, with charge density σ. Draw the appropriate Gaussian Surface
Answer:
Explanation:
Consider an endless sheet of uniform charge thickness per unit area [tex]\sigma[/tex]
For a boundless sheet of charge, the electric field will be opposite to the surface. In this way, just the closures of a round and hollow Gaussian surface will add to the electric transition. For this situation, around and hollow Gaussian surface opposite to the charge sheet is utilized. The subsequent field is a large portion of that of a conductor at harmony with this surface charge thickness.
By balance, we expect the electric field on one or the other side of a plane to be an element of x just to be guided typical to the plane and to point away from/towards the plane contingent upon whether, [tex]\sigma[/tex] is positive/negative.
According to the law;
[tex]2EA = \dfrac{q_{enc}}{\varepsilon_o}[/tex]
[tex]where; \ q_{enc} = total \ enclosed charge = \sigma A \\ \\ thus; \\ \\ 2EA = \dfrac{\sigma A}{\varepsilon_o} \\ \\ E = \dfrac{\sigma}{2 \varepsilon _o}[/tex]
I need help on this question !
Answer:
A. Create habitats for coral, but not fish
Element Type of ion formed in a chemical reaction
Phase at room
temperature
Reactivity
W
positive
solid highly reactive
X
does not form ions
gas non-reactive
Y
negative
gas highly reactive
Z positive liquid
somewhat reactive
Using your knowledge of periodic properties and trends, how would these elements BEST be classified and why?
A.
Elements W and Z are nonmetals, Elements X and Y are metals, but Element Y is in Group 1 (alkali metal).
B.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element Y is in Group 18 (noble gas).
C.
Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas).
D.
Elements W and Z are nonmetals, but Element W is in Group 17 (halogen). Elements X and Y are metals.
Answer:C
Explanation:
After reading a book, Julio looks out of the window and sees clouds in the distance. Which change allows Julio to clearly see the clouds after looking at his book? His corneas become flatter. His lenses change shape. His optic nerves begin sending signals. His vitreous humor becomes denser.
Answer:
Lens change
Explanation:
by changing the shape of the lens the rays from the clouds will be able to refract correctly in the lens then create the correct upside-down image on the retina.
Hope it helped
PLS mark BRAINLIEST
Answer:
His lenses change shape.
Explanation:
just took the quiz
Explain What is electrical energy and why do we need this energy
Answer:
WHAT IS ELECTRICAL ENERGY?Electrical energy is the most convenient form of energy for most human uses. Electrical energy is easy use and move from one location to another, but it is almost impossible to store in any large quantity. It can be used for running computers and most appliances, home heating, and even transportation.ELECTRICITY is used by industry, households, and businesses—accounting for 18% of end use energy worldwide.Electrical energy is very convenient, and as a result more and more of the energy used by a high energy society is in the form of electricity, see figure 1. The rate of electrical energy use is growing faster than the rate of electricity use, see figure 2.WHY DO WE NEED ELECTRICAL ENERGY?Electrical energy is used throughout the world to power devices, appliances and methods of transportation utilized in daily life. To make things operate, electrical energy must be emitted from energy sources such as power plants, to enable an object to consume the power it needs to function.9. True or false. Training at high altitudes can also increase the amount of
oxygen that can be carried by the circulatory system. *
i need help in (a) and (c)
please at least try
I don't know please mark as brilliant
plaque contains billions of bacteria true or false
Answer:
true
Explanation:
Answer: True
Explanation:
The first mineral to melt from a rock is
Answer:
Quartz
Explanation:
Answer:
Quartz
Explanation:
The temperature must be high enough to melt at least some minerals in the rock. The first mineral to melt from a rock will be quartz
PLEASE HELPPPPP!!!!! ILL GIVE CROWN
Denver, Colorado is located near the rocky mountains. Which list of controls below would have the strongest influence on the weather in Denver.
A ) Ocean currents, distance from large bodies of water, and altitudes
B ) Altitude, topography, and ocean currents.
C ) Latitude, altitude, and topography
D ) Topography, ocean currents, and latitude.
Answer:To understand the regional and local climates of Colorado, you must begin with a basic knowledge of Colorado's topography. Colorado lies astride the highest mountains of the Continental Divide. Nearly rectangular, its north and south boundaries are the 41° and 37° N. parallels, and the east and went boundaries are the 102° and 109° W. meridians. It is eighth in size among the 50 states, with an area of over 104,000 square miles. Although known for its mountains, nearly 40 percent of its area is taken up by the eastern high plains.
Of particular importance to the climate are Colorado's interior continental location in the middle latitudes, the high elevation of the entire region, and the mountains and ranges extending north and south approximately through the middle of the State. With an average altitude of about 6,800 feet above sea level, Colorado is the highest contiguous State in the Union. Roughly three-quarters of the Nation's land above 10,000 feet altitude lies within its borders. The State has 59 mountains 14,000 feet or higher, and about 830 mountains between 11,000 and 14,000 feet in elevation.
Explanation:
Answer:
D
Explanation:
Hope this helps :)
Explain how you can locate the Pole Star with the help of Ursa Major?
Answer: Pole star can be located using Ursa Major by extending an imaginary line from the last two stars towards the North direction.
Explanation:
Answer:
The pole star can be located using the Ursa Major constellation, by imagining a line towards the Northern direction connecting two stars present at the end of the bowl, This imaginary line meets Pole Star. The length of the imaginary line from the bowl is about five times the distance between the two stars of the bowl.
Explanation:
A canoe moving down the river with a kinetic energy of 5J and a speed of 0.5m/s. What’s the mass of the canoe
PLS HELPPP!! ITS DUE TODAY!
I will make brainliest!
Answer the following question:
Which process is an example of a physical change?
a. carrots are cut into small pieces and mixed into a salad
b. a peanut butter sandwich is eaten and broken down by enzymes in the stomach
c. sodium metal and chlorine gas are combined to form a sodium chloride, or table salt
d. sodium metal and water are combined to form a basic compound and a flammable gas
Your student desk has been in the room for many hours, it is at thermal equilibrium with the room?
Which part of your desk is colder: the wood or the metal? Why?
Answer:
metal because A: In general, metals feel colder or hotter to the touch than other materials at the same temperature because they're good thermal conductors. This means they easily transfer heat to colder objects or absorb heat from warmer objects. Thermal insulators like plastic and wood don't transfer heat as easily.
Explanation:
testing related to criteria
Answer: Test criteria offers assistance the analyzer(s) to compose the test prepare. They ought to be chosen in understanding with the accessible test exertion. Test scope measures are characterized as a proportion between the test cases required for fulfilling the criteria and those of these which have been executed
Answer 7575
Explanation: the numbers are cool
PLEASE HELP ASAP!!!!!
Answer:
MOSE
Explanation:
Shrill sound is of -------------- *
Higher frequency
Lower frequency
Higher amplitude
Lower amplitude
Answer:
Higher frequency.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.
Mathematically, the speed of a sound is given by the formula:
[tex] Speed = wavelength * frequency [/tex]
Generally, the frequency of a sound wave determines the pitch of the sound that would be heard.
A shrill sound refers to a type of sound that is typically sharp, high pitched and as such has higher frequency.
Hence, shrill sound is of higher frequency.
Warm air rises because it has less ___________.
Answer:
because it is less dense than the surrounding air
Explanation:
How do you get on the cheer squad?!
Answer:
you don't cuz cheerleaders only get in the way of the football game
how are electromagnetic waves produced
Answer:
Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave.
Answer: Electromagnetic waves are the combination of electric and magnetic field waves produced by moving charges.
The creation of all electromagnetic waves begins with a charged particle. This charged particle creates an electric field (which can exert a force on other nearby charged particles). When it accelerates as part of an oscillatory motion, the charged particle creates ripples, or oscillations, in its electric field, and also produces a magnetic field (as predicted by Maxwell’s equations).
Once in motion, the electric and magnetic fields created by a charged particle are self-perpetuating—time-dependent changes in one field (electric or magnetic) produce the other. Both electric and magnetic fields in an electromagnetic wave will fluctuate in time, one causing the other to change.
Electromagnetic waves (photons) are produced anytime a charged particle experiences a change in velocity.. The electromagnetic wave (radiation) that is produced when the charge particle changes it’s velocity is how energy is conserved. This energy is light.
Hope this helps have a awesome day/night❤️✨
Explanation:
How long will it take for a basketball spinning on someone’s finger to stop if it undergoes and angular acceleration of -0.15 rad/s and is traveling at 27 rad/s initially? How many revolutions will it make?
The basketball's angular velocity ω at time t is
ω = 27 rad/s + (-0.15 rad/s²) t
It comes to a stop when ω = 0, which happens for
0 = 27 rad/s - (0.15 rad/s²) t
t = (27 rad/s) / (0.15 rad/s²)
t = 180 s
In this time, the ball would undergoes an angular displacement θ of
θ = (27 rad/s) t + 1/2 (-0.15 rad/s²) t ²
Plug in t = 180 s and solve for θ :
θ = (27 rad/s) (180 s) - 1/2 (0.15 rad/s²) (180 s)² = 2430 rad
One complete revolution corresponds to a turn of 2π rad, so the ball makes
(2430 rad) / (2π rad/rev) ≈ 386.747 rev
or about 387 revolutions as it slows down.
Narcotics are highly addictive and affect the driver's
Oa) decision making
Ob) vision
Oc) motor skills
Od) all of the above
Answer:
D
that's should be the answer
KE=0.5.m.v2 or PE=m.g.h
kinetic and potential energy practice problems solve and show your work
1. When a golf ball is hit, it travels at 41 meters per second. The mass of a golf ball is 0.045 kg. What is the kinetic energy of the golf ball?
2. the newly developed F-22 Raptor jet fighter weighs approximately 100,000kg and can travel up to 600 meters per second what is the kinetic energy of the F-22 jet fighter at this speed
3. if the jet fighter in #2 is traveling at a height of 10,000 meters, what would the potential energy be
(1) The kinetic energy of the golf ball is 37.82 Joules,
(2) The kinetic energy of the F-22 jet fighter is 1.8 × 10¹⁰ Joules.
(3) The potential energy of the F-22 jet fighter is 9.8 × 10⁹ Joules .
What is kinetic energy?Kinetic energy is a type of power that a moving object or particle possesses. When an object undergoes work, which involves the transfer of energy, by exerting a net force, the object accelerates and consequently obtains kinetic energy.
Given:
The velocity of the ball, v = 41 m / s,
The mass of the golf ball, m = 0.045 kg,
(1) Calculate the kinetic energy as shown below,
KE = 1 / 2 × 0.045 × 41²
KE = 37.82 Joules
(2) Calculate the kinetic energy of the F-22 jet fighter as shown below,
KE = 1 / 2 × 600² × 100000
KE = 1.8 × 10¹⁰ Joules
(3) Calculate the potential energy of the jet as shown below,
PE = 100000 × 9.8 × 10000
PE = 9.8 × 10⁹ Joules
To know more about Kinetic energy:
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How do the particles in a Longitudinal Wave move?
A) Parallel to the direction of the wave
B) Perpendicular to the direction of the wave
C) Particles do not move
D) The particle is the wave (wave packet)
Explanation:
In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. The particles do not move down the tube with the wave; they simply oscillate back and forth about their individual equilibrium positions. Pick a single particle and watch its motion.
Does California have enough water?
Answer:
As the world's largest, most productive, and most controversial water system, it manages over 40 million acre feet (49 km3) of water per year. Water and water rights are among the state's divisive political issues. Due to the lack of reliable dry season rainfall, water is limited in the most populous U.S. state.