Answer:
d
Explanation:
Answer:
D.)
Parent cells create copies of their components.
Explanation:
edge2021
How are ultraviolet waves used for communication
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. Which statement
correctly describes the momentum of the rubber ball?
a. Its magnitude increased and its direction changed.
b. Its magnitude increased but its direction remained the same.
c. Its magnitude remained the same but its direction changed.
d. Its magnitude and its direction both remained the same.
Answer:
d. Its magnitude and its direction both remained the same.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.
This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.
In this scenario, a rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. Thus, the statement which correctly describes the momentum of the rubber ball is that its magnitude and its direction both remained the same because its velocity didn't change while returning to the thrower.
The correct statement should be "Its magnitude remained the same but its direction changed". Option C is correct.
Given information:
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s.
Now, the mass of the ball doesn't change and the magnitude of the velocity is also the same.
Momentum can be defined as the product of mass and velocity. It is a vector quantity because velocity is also a vector quantity, and it has magnitude and direction.
Now, the magnitude of momentum will be the same because mass and velocity don't change in magnitude.
The direction of velocity will be reversed. So, the direction of momentum will also be reversed.
Therefore, the correct statement should be "Its magnitude remained the same but its direction changed". Option C is correct.
For more details about momentum, refer to the link:
https://brainly.com/question/4956182
What can scan tiny details inside the human body by using principles of electromagnetism.
Answer:
magnetic resonance imaging (MRI)
Тесты имеют различные нормы-шкалы значений: социальные, возрастные и т.П. Индивидуальный показатель теста соотносится с его нормой. Норма теста обычно определяется в результате тестирования большой выборки испытуемых определенного возраста и пола и усреднения полученных оценок с их последующей дифференциацией по возрасту, полу и ряду других показателей. Норма теста - это средний уровень развития большой совокупности людей, похожих на данного испытуемого по ряду социально-демографических характеристик. То есть, это средний диапазон значений на шкале измеряемого свойства.
A layer of ethyl alcohol (n= 1.361) is on top of the water ( n=1.333) . At what angle relative to the normal to the interface of the two liquids is light totally reflected
Answer:
78.35°
Explanation:
THIS IS THE COMPLETE QUESTION BELOW;
A layer of ethyl alcohol (n = 1.361) is on top of water (n = 1.333). To the nearest degree, at what angle relative to the normal to the interface of the two liquids is light totally reflected?
From Snell's Law,
(ni)/(nr) = Sin (θr) / Sin (θi)
Where
θi = Angle of Incidence
θr = Angle of refraction
ni = Refractive index given for ethyl alcohol
nr = Refractive index of medium from which light is refracted
ni = 1.361
nr = 1.333
, θr = 90° ( Critical Angle is reffered to as Angle of Incidence at refracted angle of 90°) (θi = θc)
(ni)/(nr) = Sin (θr) / Sin (θi)
1.361/ 1.333 = Sin (90°)/ Sin( θc)
1.021= 0.894/ Sin( θc)
Sin( θc)= (0.9794
θc = Sin⁻¹ 0.9794)
θc = 78.35°
A 12 kg object is moving at 10 m/s to the right. It collides with a 20 kg object moving at 7
m/s to the right. What speed will the objects move together after they collide and stick
together?*
a) 5.27 m/s
b) 08.13 m/s
c) 3 m/s
d) 17.23 m/s
Answer:
Change in velocity
−2−10=−12
Time required is 4 seconds
a=Δv/t
=−12/4
=−3m/s²
Hence,
option C is correct answer.
What does it mean with the car accelerates but in the opposite direction of the car?
Answer:
When an object slows down, its acceleration is opposite to the direction of its motion. This is known as deceleration.
Explanation:
Your personal hygiene is more important to avoid you becoming ill, more so than spreading germs.
True
False
An optical device that reflects light ?
Answer:
Mirror
Explanation:
How are gamma rays used for communication?
Answer:
No
Explanation:
Electromagnetic radiation is used for communications and transmission of information. The waves that are used in this way are radio waves, microwaves, infrared radiation and light.
What is the net force acting on a jet that has a mass of 130,000kg and it accelerates at a rate of 6m/s as it takes off
Carbon (C) is an element found in living organisms. How would carbon be classified in the hierarchy of organisms?
Answer:
Explanation:
A cell
What determines the speed of a wind?
o The difference in air pressure between air masses.
O The moisture content of air over land.
O The altitude of the warmer air mass.
The moisture content of air over water.
Answer:
Answer: The difference in air pressure between air masses.
Answer:
The difference in air pressure between air masses.
Explanation:
The difference in air pressure, just like letting the higher-pressure air out of a balloon, determines the speed of the wind.
Correct the following statement:
Wind is caused by the revolution of the Earth around the Sun.
O Wind is caused by the rotation of the Earth.
O Wind is caused by the differences in air pressure on Earth's surface.
This statement is already correct.
O Wind is caused by the greenhouse effect.
Answer:
It's the 3rd option
Explanation:
Wind is caused by the differences in air pressure on Earth's surface.
A body moves with constant speed but has an acceleration. This is possible if it
Answer:
This is possible if it moves in a circle.
Explanation:
hope this helps and is right :)
p.s. i really need brainliest
There is a small hole of radius r in a hollow sphere, which is immersed in a liquid. Upto what maximum depth it can be immersed so that liquid may not enter in it? Density of liquid is d and surface tension is T.
Answer:
h = 4T/dgr
Explanation:
Using Laplace law for spherical bubble, the pressure difference P'- P = 4T/r where T = surface tension and r = radius of sphere.
Now, the pressure difference on the hollow sphere P' - P = dgh where d = density of liquid, g = acceleration due to gravity and h = maximum depth to which sphere must be immersed.
So dgh = 4T/r
h = 4T/dgr
what's the difference between work and power
Work is defined as the process of energy transfer to the motion of an object through the application of force. ... Power is defined as the amount of energy transferred in unit time. The SI unit of power is the watt.
You need to have power or energy, to be able to work. When you reach another lesson, you will learn about time, which is the flow of work you have done. You need more work than time for your work to count.
If you need more help, don't hesitate to ask!
May I please have brainliest?
WORK is the amount of energy used to get something done.
POWER is the RATE at which the energy is used and the work is done.
Hurry up i need help.
The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be __________.
Question 1 options:
Different
The same
Not equivilent
With in 500 degrees of eachother
Answer:
The answer would be B) The Same
Explanation:
Not gonna lie I checked my class notes but I figured this would help :)
Good luck!!!
What has more kinetic energy 15 kg ball rolling north at 15 m/s or a 15 kg ball rolling backwards at 7m/s
Answer:
15 kg ball
Explanation:
A liquid has a specific heat of 9 J/g • °C and a solid has a specific heat of 3 J/g • °C. Which
substance, the solid or liquid will heat up faster? Which will cool down faster?
Explanation:
substances have been in direct sunlight for up to 60 minutes. ... cool the fastest? ... 0.60 J/g °C. Match & then label each substance with its specific heat capacity ...
DUE IN 4 HOURS! HELP! WILL MARK BRAINLIEST IF DONE WITHIN THE HOUR!
Maisey is running 12mph and comes to an abrupt stop in 3 seconds when she hears her name called. What is her acceleration?
Answer:
~ 0.001 m/s^2
Explanation:
If you convert 12 miles per hour to, miles per second, it makes this easier to calculate, so do that first
12m/ 1 hour * 1 hour/ 60 mins * 1 min/ 60 sec = ~0.003333 miles per second.
Next remember that acceleration = velocity/time
So our new velocity: 0.003333 over time: 3 seconds = the acceleration.
0.003333/3 = 0.001 m/s^2
PLEASE HELP ASAP!!
Select the correct answer.
According to this map, which county in Florida is most in need of safe rooms and hurricane ties?
A.
Hillsborough
B.
Jefferson
C.
Palm Beach
D.
Miami-Dade
Answer:
I think it's Miami-Dade
Explanation:
i hope this helps
Answer:
it is miami-dade!
Explanation:
what determines the color of light?
1. wavelength
2. wave height
3. wave speed
4. wave amplitude
Answer:
wave length
Explanation:
what is the physical properties of radon
Answer:
1) Radon is colorless at standard temperature and pressure and it is the most dense gas known. At temperature below it's freezing point is has a brilliant yellow phosphorescence. It is chemically unreactive, it is highly radioactive and has a short half life.2) 7.5 times heavier than air and more than 100 times heavier than hydrogen. The gas liquefies at −61.8 °C (−79.2 °F) and freezes at −71 °C (−96 °F). On further cooling, solid radon glows with a soft yellow light that becomes orange-red at the temperature of liquid air (−195 °C [−319 °F]).Explanation:
I think this much is enough , as more information is given in other answer if more is needed just comment me I will answer you there only.Why do some organisms never turn into fossils?
A. They are far too large to be buried in the ground.
B. They are made mostly of soft tissues.
C. They contain too much protein to be preserved.
D. They contain chemicals that prevent the hardening of their bodies.
Answer:
The answer is B.
Explanation:
Since they are made up of soft tissues, they decompose become they become fossils.
Speed = Distance Time Velocity = 1. Find the velocity of a truck that travels 75miles north in 2.5 hours? List: Equation: Substitution: Answer with units:
Answer:
187.5 m/s (i think)
Explanation:
If you use the formula V= T times displacement you can find this out by doing the following-
Displacement equals 75 m
T equals 2.5 hrs
75x2.5= 187.5
and since velocity is measured in m/s, it becomes
187.5 m/s
Classify each substance as either a conductor or insulator.
A sample of mercury:
✔ conductor
A piece of glass:
✔ insulator
A rubber hose:
✔ insulator
A negatively ionized lithium paste:
✔ conductor
The correct classification of each substance is as follows:
A sample of mercury: conductorA piece of glass: insulatorA rubber hose: insulatorA negatively ionized lithium paste: conductorWhat are conductors and insulators?A conductor is a substance that can transmit electricity, heat, light or sound while an insulator is a substance that does not transmit heat, sound or electricity.
Conductors are usually metals while insulators are usually non-metals. Examples of conductors include;
IronAluminumCopperExamples of insulators include;
GlassPaperWoodSilkTherefore, the correct classification of each substance is as follows:
A sample of mercury: conductorA piece of glass: insulatorA rubber hose: insulatorA negatively ionized lithium paste: conductorLearn more about conduction at: https://brainly.com/question/18084972
#SPJ1
Answer:
Explanation:
E2020
A food has 2 grams of protein, 2 grams of carbs, and 2 grams of fat. How many total calories does this food have? HELP
Answer: 6 grams
Explanation:
Cause 2+2+2=6
How many significant figures does 1740200 have?
2. The weights of four objects with different masses have been calculated to show how much each object would weigh on four different planets.Based on the table, which object would have the largest mass and greatest weight on Earth?
Weights of Four Objects on Four Planets
Planet 1
B 10 N
C 1 N
D 20 N
Planet 2
A 10N
C 0.2 N
D 4 N
Planet 3
A 100 N
B 20 N
D 40 N
Planet 4
A 5 N
B 1N
C 0.1 N
Answer:
d
Explanation: