Answer:
observation
hypothesis
theory
matter
agent
experimental group
control group
temperature
particle
criteria
Explanation:
what’s the frequency of the wave?
are you in kindergarten
Explain how competition between organisms affects the availability of resources in an area.
please help!
Answer:
Completion between two organism is when they fight over resources inadvertently causing the use and destruction of recourses making it more scares. if they don't adapt they die out.
Answer:Sample Response: In any ecosystem, the availability of resources is often limited due to competition. Competition results when two organisms require the same limited resource, such as food, water, shelter, or sunlight.
Explanation:
Go with this
A constant force of 20 N is exerted for 10 s on
a 40 kg object initially at rest. The change in
speed of this object will be:
Calculate the number of moles in 44 g of iron sulfide.
Relative atomic masses
(4): Fe = 56, S = 32
Answer:
2 moles
Explanation:
please mark me as brainlest
The mass of one mole of iron sulphide is 88 g. Then the number of moles in 44 g is 0.5 moles.
What is one mole ?One mole of a substance is its amount which contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every element contains Avogadro number of atoms.
Similarly one mole of every compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.
Atomic mass of Fe = 56 g/mol
atomic mass o S = 32 g/mol
molar mass of FeS = 56 + 32 = 88 g/mol
Mass of one mole of iron sulphide (FeS) is 88 g. Hence number of moles in 44 g is :
no.of moles = given weight/molar mass
= 44 g /88 g/mol = 0.5 mol
Therefore, the number of moles of FeS in 44 g is 0.5.
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True or False:
Solids always
have a higher density than
liquids and gases.
Answer:
False I hoped this helpful for you....Thank you ☺️☺️
Answer:
True.
Explanation:
This is because the solid particles are very close to each other due to strong intermolecular force attraction between them.
How can a person increase the momentum of an object?
A. by decreasing its velocity
B. by increasing its mass
C. by increasing its friction
D. by decreasing its acceleration
Answer: B
Explanation:
Classical momentum is defined to be the product of mass and velocity. Increasing the objects total mass or their velocity would also increase the momentum. The only applicable answer is B, increasing the mass of the object.
[tex]p=mv[/tex]
Answer:
B. By increasing its mass
Explanation:
Momentum of an object is directly proportional to its mass and velocity
PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1. _____ - a line connecting the North Pole to the South Pole.
Full Moon
Crescent
First Quarter
Axis
2. _____ - Moon phase in which less than half of the Moon appears to be illuminated.
First Quarter
Axis
Full Moon
Cressent
3. _____ - Moon phase in which exactly half of the Moon appears to be illuminated
Cressent
Full Moon
First Quarter
Axis
4. _____ - Moon phase in which all of the Moon appears to be illuminated.
Axis
Cressent
Full Moon
First Quarter
Answer:
D
D
C
C
Explanation: BRAINLIEST ME
As a block falls through the air by 40m it does work equal to-1800. Determine the mass ofthe block
Answer:
don't
Explanation:
The mass of the block is 4.5 kg that falls by 40m and work done is -1800J.
What is work done?The work done is defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object's displacement.
w=f × s
-1800=f×40
f=45 N
by Newton's 2nd law
F=ma
45=m×(10)
m=45÷10=4.5 kg
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Jim and Harry are having a race to get to Cindy's house. Cindy's house is 600 meters away. Jim runs as hard as he can with a speed of 5.3 m/s and Harry jogs with a speed of 8.2 m/s. How long will Harry have to wait for Jim when he gets to Cindy's house?
Given :
Cindy's house is 600 meters away. Jim runs as hard as he can with a speed of 5.3 m/s and Harry jogs with a speed of 8.2 m/s.
To Find :
How long will Harry have to wait for Jim when he gets to Cindy's house.
Solution :
Time taken by Harry to reach Cindy's house :
[tex]t_1=\dfrac{600}{8.2}\ s= 73.17\ s[/tex]
Time taken by Jim to reach Cindy's house :
[tex]t_2=\dfrac{600}{5.3}\ s=113.21\ s[/tex]
Time taken by Harry to wait for Jim is :
T = [tex]t_2-t_1[/tex] = 113.21 - 73.17 s = 40.04 s
Hence, this is the required solution.
a car is moving at 30.0 km/h when it accelerates at 2.0 m/s for 3.6 s. what is the car final speed?
Answer:
wrong question
Explanation:
unit of acceleration is written in m/s which is wrong
The final velocity of the car which is moving with the initial velocity of 30km/h is 15.53m/s.
What is Acceleration?Acceleration of an object is the rate of change in the velocity of an object. It depends upon the initial and final velocity of an object. It is a vector quantity because it has both magnitude and direction. The SI unit of acceleration is meter per second square.
a = (v-u)/ t
v = u + at
u = 30 × 1000/ 3600 = 8.33m/s
a = 2.0m/s²
t = 3.6 seconds
v = u + at
v = 8.33 + 2.0 × 3.6
v = 8.33 + 7.2
v = 15.53m/s
Therefore, the final velocity of the car is 15.53m/s.
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Which force is responsible for determining the shapes of galaxies?.
Answer:
Gravity
Explanation:
Gravity is what causes stars to form. During accretion, gravity pulls matter into a core, which can be a star, planet or black hole.
(b) A teacher uses a 2200 W kettle to heat water.
The kettle is switched on for 2 minutes.
(i) Calculate the energy transferred by the kettle.
The amount of energy transferred by the kettle in the given time is 264000J
Given the data in the question;
Power of electric kettle; [tex]P = 2200W[/tex]Time elapsed; [tex]t = 2min = 120s[/tex]Energy transferred by the kettle; [tex]E = \ ?[/tex]
Energy and PowerElectrical energy is energy gotten due to the movement of particles that are electrically charged .
Power is the quantity of energy transferred per unit time. It can be expressed as;
[tex]Power = \frac{Energy }{time}[/tex]
To determine the energy transferred by the kettle, we substitute our given values into the expression above.
[tex]Power = \frac{Energy}{time} \\\\2200W = \frac{E}{120s}\\ \\E = 2200W * 120s\\\\E = 264000J[/tex]
Therefore, the amount of energy transferred by the kettle in the given time is 264000J.
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In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom. He plans to heat the beaker over low heat and make more observations.Which statement is most likely correct? A physical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids. A physical change occurred, so even if Cash heats it, the white solid will remain. A chemical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids. A chemical change occurred, so even if Cash heats it, the white solid will remain.
Answer:
A chemical change occurred, so even if Cash heats it, the white solid will remain
Explanation:
There are two types of changes that occur in Chemistry viz; physical change and chemical change. Physical changes are those changes do not involve any change in the chemical composition of the substances involved while a chemical change involves a change in chemical composition.
In a chemical change, there are characteristics signs such as formation of gaseous bubbles, solid precipitates etc. as the information in this question depicts. According to this question, Cash mixes two clear liquids together which results in the formation of bubbles and a white solid that settles at the bottom. Hence, THIS REPRESENTS A CHEMICAL CHANGE
Most chemical changes are usually irreversible i.e. they don't return to their original form. Hence, even if Cash heats it, the white solid will remain.
Answer:
A chemical change occurred, so even if Cash heats it, the white solid will remain
A student adds a tablespoon of sugar to a glass containing
tea and ice cubes. The mixture is then stirred until all the
sugar dissolves.
Which observation is a clue that the student's final mixture is heterogeneous?
A. Some ice cubes are floating in the tea.
B. Some water droplets form on the outside of the glass.
C. The mixture looks the same throughout.
D. The sugar crystals are no longer visible in the tea.
Answer:
[tex]\huge\boxed{\sf Option \ A}[/tex]
Explanation:
When we stir the solution such that it forms a mixture and the sugar is completely dissolved, we still find some ice cubes floating in the tea which shows that it is a heterogeneous mixture.
A Heterogeneous Mixture:
It is a mixture which has two or more phases that can be separated by physical means.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807Answer: Some ice cubes are floating in the tea.
Explanation:
A. Some ice cubes are floating in the tea.
B. Some water droplets form on the outside of the glass.
C. The mixture looks the same throughout.
D. The sugar crystals are no longer visible in the tea.
When a substance goes directly from a solid state to a gas state, as dry ice
does, ___
A. it's called deposition.
B. the line on the energy-vs. temperature graph is horizontal.
C. it's called sublimation.
D. it's undergoing a phase change.
E.it's called fusion.
it's called sublimation
Explanation:
it's called sublimation.
An object of mass 2 kg rests on the floor, as shown in the picture. A force of 45 N, making an angle of 60° to the vertical, is applied
to move the object. What is the acceleration of the object in the horizontal direction?
Answer:B
Explanation:
I just did that
The bicep muscle has an attachment point at the shoulder and one in the upper forearm. Look at these images of the bones of the arm. Imagine that the point of the arrow is where the force of the biceps muscle is applied to the bone. 4 images of the bones of the arm are shown. In image A, the bicep pulls the forearm upwards. In image B, the forearm pushes the bicep upwards. In image c, the forearm pulls to the right. In image D, the forearm pushes to the left. Which image would result in the biceps muscle contracting and the forearm being lifted? A B C D.
Option A is correct. The biceps is the muscle that runs down the front of the upper arm. The biceps consists of a single muscle with a "short head" and a "long head'.
What is a bicep muscle?
The biceps is the muscle that runs down the front of the upper arm. The biceps consists of a single muscle with a "short head" and a "long head."
Tough connective fibers called tendons link the biceps to the arm bones. Because the insertion of the bicep muscle is in the forearm, when it contracts, it raises the forearm.
Hence Option A is correct.
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Which of the following is true about metabolism
Your metabolism speeds up naturally as you get older
You can never speed up or slow down your body’s metabolism
Your basal metabolism is the amount of energy (calories) your body uses just to keep you living
Your metabolism is not affected your heredity, age and maturation
find the force required to produce iacceleration of 2 metre per second square on a body of mass 10 kg what will be its acceleration if a force is double
The wording of the problem leaves much to be desired. It does not indicate in which direction is the object’s acceleration. It also fails to mention the presence or absence of friction. In order to cover all conditions, the answer must be a range of values, with the direction changing from zero to ninety degrees.
The range would be: 20 N to 120 N (100 + 20 = 120) starting from zero all the way up to ninety degrees.
Hope it Helps❤A box falls off of a tailgate and slides along the street for a distance of 62.5 m. Friction slows the box at –5.0 m/s2. At what speed was the truck traveling when the box fell?
Answer:
25 m/s
Explanation:
This question can be solved using equation of motion
[tex]v^2 = u^2 + 2as[/tex]
where
v is the final velocity
u is the initial velocity
s is the distance covered while moving from initial to final velocity
a is the acceleration
_____________________________________________
Given
box moved for distance of 62.5 m
Friction slows the box at –5.0 m/s2----> this statement means that there is deceleration , speed of truck decreases by 5 m/s in every second until the box comes to rest. Friction causes this deceleration.
thus in this problem
a = -5.0 m/s2
V = 0 as body came to rest due to friction deceleration
u the initial velocity we have to find
the initial velocity of box will be the same as speed of truck, as the box was in the truck and hence box will pick the speed of truck.
so if we find speed of box, we will be able get sped of truck as well.
using equation of motion
[tex]v^2 = u^2 + 2as\\0^2 = u^2 + 2*-5* 62.5\\0 = u^2 - 625\\u^2 = 625\\\sqrt{u^2} = \sqrt{625} \\u = 25[/tex]
Thus, initial speed with the truck was travelling was 25 m/s.
Which of the following is not a type of friction
a
static
b
sliding
c
rolling
d
fluid
e
gravitational
Answer:
Fluid (d).
Explanation:
When there is fluid, there can't be friction.
Phenomena that Occur on the Surface of the Sun
please help me asap. and please label it. thank youuu !
Answer:
solar wind
radio wave plux
solar flares
coronal mass ejections
coronal heating
Which characteristics describe herbaceous stems? (Select all that apply. )
thin
stiff
thick
pliable
The characteristics that describes an herbaceous stem is thin.
What is an herb?Herb is form of a plant that posseses a non-woody stem.
Herbs are one of the three forms in which plants can exist. The other two are:
TreesShrubsSince herbaceous plants are non-woody, this means that their stems will be thin.
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Answer: thin and pliable
Explanation:
Is cereal soup? Why or why not? Pls HELP ASAP
Answer:
yes
Explanation:
by definition, yes. soup is defined as "a liquid dish, typically made by boiling meat, fish, or vegetables, etc., in stock or water.", so a liquid dish prepared by boiling and extracting flavor. so technically, a bowl of cereal would be a wheat-milk soup.
help in my home work!
convert 80°c to fahrenheit?
Answer:
176 degrees fahrenheit
Explanation:
80°C × 9/5) + 32 = 176°F
Mark me brainliest!!
80 °C
to find:80 °C as Fahrenheit
solution:[tex]f = (c \times \frac{9}{5} ) + 32[/tex]
[tex]f = (80 \times \frac{9}{5} ) + 32[/tex]
[tex]f = 176 \: fahrenheit[/tex]
hence, 80°C converted to Fahrenheit is 176°F
A block is at rest on a frictionless ramp that is elevated 22.0 degrees above the horizontal.
a)Determine the acceleration of the block as it slides down the ramp.
Answer:
3.67 m/s²
Explanation:
Draw a free body diagram. There are two forces on the object:
Weight force mg pulling straight down,
and normal force N pushing perpendicular to the plane.
Sum the forces in the parallel direction.
∑F = ma
mg sin θ = ma
a = g sin θ
a = (9.8 m/s²) (sin 22.0°)
a = 3.67 m/s²
What is the density of a box
that has a mass of 35 g and
a volume of 17cm3? squared
No one has answered.....
Astronomy is the study of the stars, planets, and other objects that make up the universe.
True
False
Answer:
Truth all the way
Explanation:
:) hope this helps
An airplane accelerates with a constant rate of 3.0 m/s2 starting at a velocity of 21 m/s. If the distance traveled during this acceleration was 535 m, what is the final velocity?
Answer:
60.42 m/s.
Explanation:
This problem can be solved using equation of motion
[tex]V^2 = u^2 + 2as[/tex]
where v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance moved by the body to reach final velocity v from initial velocity u.
___________________________________________________
given
u = 21m/s
a = 3.0 m/s2
s = 535 m
v, the final velocity we have to find
using the equation of motion
[tex]V^2 = u^2 + 2as\\V^2 = 21^2 + 2*3*535\\V^2 = 441 + 3210 = 3651\\\sqrt{v^2} = \sqrt{3651} \\v = 60.42[/tex]
Thus, the final velocity of airplane is 60.42 m/s.
The final velocity is 60.42 m/s
The parameters given in the question are;
initial velocity(u)= 21 m/s
acceleration(a)= 3.0 m/s²
distance(s)= 535 meters
final velocity(v)= ?
The final velocity can be calculated as follows
v²= u² +2as
v²= 21² + 2(3)(535)
v²= 441 + 3210
v²= 3651
v= √3651
v= 60.42
Hence the final velocity is 60.42 m/s
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Two identical springs are dangling from the ceiling. The first spring is pushed upward with a
force of magnitude 188 N, compressing the spring by 21.8 cm. A box of weight 38 N is
attached to the end of the second spring. What distance is the second spring stretched?