Physical changes are not represented by equations because it does not involve rearrangement of atoms.
WHAT IS A PHYSICAL CHANGE:A physical change is a change that does not involve formation of new substances. Since no new substances are formed, this means that the atoms of the substance is not broken or rearranged. Unlike chemical changes, physical changes involves a change in state of matter.Therefore, physical changes are not represented by equations because it does not involve rearrangement of atoms.
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A rocket initially at rest on the ground lifts off vertically with a constant acceleration of 20m/s^2. How long will it take the rocket to reach an altitude of 16km
16 km = 1/2 (20 m/s²) t ²
t ² = (32 km) / (20 m/s²)
t ² = (32,000 m) / (20 m/s²)
t = √(1600 s²)
t = 40 s
Fiber is not easily digested by the body.
True
False
Answer:
true
Explanation:
Answer:
Is Falseeee
Explanation:
Hope it helps
The purpose of concept-mapping is to
a. Identify sequence
b. Identify vocabulary
c. Identify relationships
d. Identify questions
Please select the best answer from the choices provided
Ο Α
OB
ОС
OD
Answer:
c. Identify relationships
Explanation:
One of the most important feature of concept-mapping is to identify relationships between the phenomenon being mapped.
Concept map is the process of using shapes, colors and lines to represent a person's thought process. Concept maps are very useful study aids. They present the relationship between different part of a study.Answer:
its a... i have seen one for every letter lol
Explanation:
pls help i’m begging you
Answer:
true,true,false,true
Explanation:
If F applied is 17 Newtons to the right, what is the magnitude and direction of the friction force, if the object is traveling with the constant velocity?
Find friction force and its direction
There's some missing context here, but I would guess you're talking about a box or something with some mass m being pushed over a flat surface. Since it's moving with constant velocity, there is no acceleration and so the box is in equilibrium. In particular, the horizontal forces cancel each other. If f is the magnitude of the friction force, then
17 N + (-f ) = 0
f = 17 N
and this force points opposite the direction of motion.
What is the force due to gravity of a 38 kg student?
Answer:
F_g = 372.78 N
Explanation:
Formula for force of gravity is;
F_g = mg
Where;
m is mass
g is acceleration due to gravity
We are given;
Mass = 38 kg
Acceleration due to gravity has a constant value of 9.81 m/s²
Thus;
F_g = 38 × 9.81
F_g = 372.78 N
Please help!1!!1111!!1!!!
what are all 7 parts of the eye?
Answer:
The Sclera, Cornea, Iris/Pupil, Lens, Retina, Ciliary Muscle, and Optic Nerve
Diagram:
Answer:
Sclera. The sclera is the white of the eye. ...
The Cornea. The cornea is the clear bulging surface in front of the eye. ...
Anterior & Posterior Chambers. The anterior chamber is between the cornea and the iris. ...
Iris/Pupil. ...
Lens. ...
Vitreous Humor. ...
Retina.
Explanation:
Sclera. The sclera is the white of the eye. ...
The Cornea. The cornea is the clear bulging surface in front of the eye. ...
Anterior & Posterior Chambers. The anterior chamber is between the cornea and the iris. ...
Iris/Pupil. ...
Lens. ...
Vitreous Humor. ...
Retina.
A toy car is tied to a post with string, causing it to drive in a tight circle. This is
shown in the picture below.
In which direction will the toy car go if the string breaks?
Answer:the answer is direction b
Explanation:
If the string breaks, the toy car go on path B. The correct option is D.
What is centrifugal force?The pseudo force which acts when the centripetal force ceases to act on the particle moving in the circular path. While moving, the centripetal force acts towards the center of the circular path.
A toy car is tied to a post with string, causing it to drive in a tight circle. If the string breaks, the toy car is thrown out of the track.
The centrifugal force acts away from the center. But the velocity of motion will be tangential to the circular path. So, when string breaks, the toy car will follow the path B.
Thus, the correct option is D.
Learn more about centrifugal force.
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Newton's first law states that objects do not change their motion unless acted upon by a net force. What does the word "net" mean in this context?
A A woven net, such as a fishing net or basketball net
B To catch or ensnare
C Remaining or left over after everything has been accounted for
D To cover, such as with mosquito netting
Answer:
Explanation:
C Remaining or left over after everything has been accounted for.
You can have as many forces as you can define as long as there is an opposing force that cancels it out. If there is just 1 more force that cannot be cancelled, then it is a remaining force and it determines what happens to the object.
The rest have to do with something that resembles a fisherman's net.
Answer:
C
Explanation:
Only reasonable answer.
During exercise, the supply of oxygen and __________ to muscles increases. What one word completes the sentence?
Answer:
Glucose
Explanation:
During exercise, muscles need more energy. They get this energy by aerobic respiration, which uses oxygen and glucose to release energy.
Note: If the body fails to supply oxygen to the muscles fast enough, the muscles will produce energy by anaerobic respiration, which is not as effective as aerobic respiration in addition to producing lactic acid.
During exercise, the supply of oxygen and glucose to muscles increases. During exercise, muscles need more energy.
What happens during exercise?They get this energy by high-impact breath, which utilizes oxygen and glucose to deliver energy.
During exercise, your muscles are working diligently. Your breathing and pulse increment, maneuvering more oxygen into the circulation system. As you work out, the oxygen that arrives at your muscles changes over accessible glucose into ATP, furnishing your body with the energy it requires to finish your exercise.
Find more information about Exercise here:
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I am unsure about what I'm suppose to do
Answer:
1st box: increase
supporting evidence: As the girl swings downward she will gain more height due to the increasing force pushing her
2nd box: increase
supporting evidence: the magnetic force of the earth will increase the kinetic energy of the girl when she goes downward slightly as she swings forward
3rd box :increase
supporting evidence:As the girl swings downward she will gain more speed due to the gravitational pull
Explanation:
Sandy wanted to find out
Answer:
I prefer to write the full question.....I think you should too.....or this is just free points?
if your smart in science please help me, thank u
Answer:
Air steel water
Explanation:
which action will decrease the gravitational force between two objects ?
Answer:
c
Explanation:
moving the mass of each object
Answer:C. Moving the objects farther apart
Explanation:
30 PT Pweese help one more timeeee
pweese look at the image below
Answer:
A
Explanation:
X Is going vertical while the other is horizontal
Answer:
(I dont know why my answer was deleted but here it is again)
A) slowing down in the negative direction
Explanation:
{Reason why is because it is slowing down, negative wise (it said i have to give a an explanation so you don't have to mind this parenthesis lololol)}
Hope this helps!!
God Bless!!
~DuffyDuck~
(Btw it said you gave me brainliest so thank you, even though it was deleted lol. You are awesome haha)
Select all that apply.
Which of the following is a valid reason why females are underrepresented in STEM jobs?
Females like technology and science, but they are not confident in their mathematics abilities.
Females are more likely to pursue STEM education in societies where females have STEM jobs.
Females like to study STEM subjects, but they do not want to work in STEM jobs.
Females are not as competent as males in mathematics, science, and technology.
Answer:
Its most likely answer number 2
Answer:
Females like technology and science, but they are not confident in their mathematics abilities.
and
Females are more likely to pursue STEM education in societies where females have STEM jobs.
Im doing this assignment right now
If there was a ball falling from a tree and there was a guy under the tree, the balls was falling 12 mph and the guy under the tree has 2 seconds to escape. Did the ball land in his head or did he dodge it?
Answer:
He dodged it.
Explanation:
If you drop a rock from 490 meters high, how long will it take the hit the ground? (Remember to make height negative when solving because it is falling)
A. 12.88 Seconds
B. 7.88 Seconds
C. 5 Seconds
D. 10 Seconds
Answer:
C
Explanation:
Which of the following describes air temperature and air pressure at higher altitudes?
Group of answer choices:
Air temperature increase while air pressure decreases
Air temperature and air pressure both decrease
Air temperature and air pressure both increase
Air temperature decreases while air pressure increases
Answer:
Air temperature and air pressure both decreases
Answer: A
Explanation:
THIS IS DUE TOMORROW! WILL GIVE BRAINLIEST!!
6. How does sea-floor spreading explain why the youngest rocks are found near the mid-Atlantic ridge?
Answer:
With distance from the ridge crest, the sediments and crust get thicker. This also supports the idea that the youngest rocks are on the ridge axis and that the rocks get older with distance away from the ridge (Figure below). Something causes the seafloor to be created at the ridge crest.
Answer: With distance from the ridge crest, the sediments and crust get thicker. This also supports the idea that the youngest rocks are on the ridge axis and that the rocks get older with distance away from the ridge (Figure below). Something causes the seafloor to be created at the ridge crest
Explanation:
New rock is formed near the mid-oceanic ridge as oceanic plates diverge or separate from each other. Hot rocks rising from the asthenosphere melt from decompression as they rise, filling the fault and forming new basaltic oceanic crust. As new crust is added, older crust is pushed away. Therefore, the further away from the mid-oceanic ridge, the older the rocks.
A repelling force occurs between two charged objects when the charges are of Equal magnitude. Equal magnitude. a Unequal magnitude.b Unequal magnitude. c Like/same signs.d Like/same signs. e Unlike signs. help plz
Answer:
c Like/same signs
Explanation:
A repelling force occurs between two or more charged objects with the charges are of like or same sign.
According to Coulombs law, like charges repel on another, unlike charges attracts on another. If a positive charge comes into the vicinity of another positive charge, there will be repulsion. When oppositely charge species are brought near each other, there is an attraction.Therefore, repulsion occurs when like charges are brought close to each other.
An object with a mass of 5kg accelerates 20m/s" when an unknown force is applied. What is the amount of force?
please help!!
Answer:
100 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 5 × 20
We have the final answer as
100 NHope this helps you
A beach ball, moving with a velocity of 2 m/s, rolls off a pier and hits the water 0.5 m from the end of the pier. It strikes the water 0.25 seconds later. How high is the pier above the water? Disregard air resistance. 1.23 m 0.31 m 0.61 m 2.45 m
Answer:
0.31 m
Explanation:
The following data were obtained from the question:
Horizontal distance (s) = 0.5 m
Horizontal velocity (u) = 2 m/s
Time (t) = 0.25 s
Height (h) of the pier =.?
The height of the pier can be obtained as illustrated below:
Time (t) = 0.25 s
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) of the pier =.?
h = ½gt²
h = ½ × 9.8 × 0.25²
h = 4.9 × 0.0625
h = 0.31 m
The, the height of the pier is 0.31 m
Calculate how much steam from water boiling at 100 C will just melt 50 gm of wax at 20 C. (Melting point of wax=55 C, sp. heat capacity of wax=0.7cal/g C, sp. latent heat of fusion of wax=35cal/g)
Answer:
m₁ = 5.507 x 10⁻³ kg = 5.507 g
Explanation:
The heat released by the steam must be absorbed by the melting wax, according to the law of conservation of energy:
Heat Released by Steam = Heat Absorbed by Wax
Latent Heat of Fusion of Steam = Heat Absorbed by Wax + Latent Heat of Fusion of Wax
m₁H₁ = m₂CΔT₂ + m₂H₂
where,
m₁ = mass of water = ?
H₁ = Latent Heat of Fusion of Water = 2260 KJ/kg = 2.26 x 10⁶ J/kg
m₂ = mass of wax = 50 g = 0.05 kg
C = specific heat capacity of wax = (0.7 cal/g°C)(1000 g/1 kg)(4.184 J/1 Cal)
C = 2928.8 J/kg.°C
ΔT₂ = Change in Temperature of Wax = 55°C - 20°C = 35°C
H₂ = Latent Heat of Fusion of Wax = (35 cal/g)(1000 g/1 kg)(4.184 J/1 Cal)
H₂ = 146440 J/kg
Therefore,
m₁(2.26 x 10⁶ J/kg) = (0.05 kg)(2928.8 J/kg.°C)(35°C) + (0.05 kg)(146440 J/kg)
m₁ = (5125.4 J + 7322 J)/2.26 x 10⁶ J/kg
m₁ = 5.507 x 10⁻³ kg = 5.507 g
Question 4 What is the standard Hz rate (cycles per second) in the US? 60 Hz 20 Hz 50 Hz 80 Hz
The standard in the United States is 120-volt and 60Hz AC electricity.
Answer:
120-volt and 60Hz AC electricity.
Explanation:
Find the mass of the car.
[tex]\huge\boxed{770.8\overline{3}\ \text{kg}}[/tex]
We know that force equals mass times acceleration, so substitute in the known values and solve.
[tex]\begin{aligned}F&=ma\\1850&=m*2.4\\1850\div2.4&=m*2.4\div2.4\\\boxed{770.8\overline{3}}&=m\end{aligned}[/tex]
PLS HURRY Give two ways that citizens can influence the technology that affects
them. *
Answer:
They can use it to help them get a job, for example, tech typically have apps to help aid the citizen.
They can use their technology to try and make their life style easier for example, Google Home.
Cody lives in Florida along the eastern coast. The kind of air mass likely to occur
over his region would be
Choose...
. It would develop here because
Choose...
.
Near Earth's surface, the acceleration due to gravity is __________ and directed __________.
Answer:
gravity can help us walk
Explanation:
i know cuz we are able to walk
The other name for 'net force' is 'unbalanced force'. What is the name of the force that could be applied to an object that would balance a net force and create a state of equilibrium?
Answer:
Since these two forces are of equal magnitude and in opposite directions, they balance each other. The book is said to be at equilibrium. There is no unbalanced force acting upon the book and thus the book maintains its state of motion. When all the forces acting upon an object balance each other, the object will be at equilibrium; it will not accelerate.
Explanation:
