Answer:
C
Explanation:
The apparent motion is that Earth is rotating on its axis.
How sun appears to move across the sky during the day?The Sun appears to move across the sky during the day and disappears at the night. The Earth is spinning towards the east. The Earth spins or rotates about its own axis, an imaginary line that runs through the middle of the Earth between the two poles, i.e., North and South poles.In case of the Moon, the spin will gets changed.The main reason for the appearing and disappearing of Sun in the Earth is as Earth rotates in its own axis towards the east. It will not happen because of the Sun's and Earth size, or titled on its axis.
Thus, Option C - rotating on its axis is the correct answer.
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A pool ball moving 1.33 m/s strikes an identical ball at rest. Afterward, the first ball moves 0.814 m/s at a 33.3° angle. What is the x-component and y-component of the velocity of the second ball? pls help quick
Answer:
X - component = v2 = 0.650 m/s
Y - component = v2 = 0.447 m/s
Explanation:
Given that :
Conservation of momentum
m1u1 + m2u2 = m1v1 + m2v2
m = mass of pool ball ; u = initial velocity ; v = final velocity
Since the masses are identical
x - component
u1 + u2 = v1 + v2
u1 = 1.33 m/s
u2 = 0
Final speed of first ball = 0.814 m/s at an angle of 33.3° ;
v1 = 0.814*cos33.3 = 0.814 * 0.8358073 = 0.6803471 m/s
v2x = u1x + u2x - v1
v2x = 1.33 + 0 - 0.6803471
v2x = 0.6496529 m/s
v2x = 0.650 m/s
Y - component :
v1sinθ= 0.814*sin33.3 ; 0.814 * 0.5490228 = 0.4469045 m/s
v2y = 0.447 m/s
Answer:
the y component is -0.477
Explanation:
u1+u2=v1+v2
u1=1.33, u2=0, v1= 0.814sin(33.3)= 0.477, v2=?
so, 1.33+0=0.477+x =
-0.477
Joel inflates a balloon and ties it off. He then rubs the balloon against his hair, which makes his
hair stand up. He then places the balloon near the classroom wall and sticks it to the wall. Finally, he
pops the balloon with a pin. Which of these is an example of gaining a charge by friction in this example?
A. Rubbing the balloon against his hair
B. Placing the balloon near the classroom wall
C. Touching the balloon to the classroom wall
D. Popping the balloon with a pin
Answer: I Believe Its A. :)
When friction slows a sliding block___
A) the block's kinetic energy is transformed into internal energy
B) the block’s potential energy is transformed into internal energy
C) the block’s internal energy is transformed into kinetic energy
D) the block’s internal energy is transformed into potential energy
Answer:
A
Explanation:
When friction slows a sliding block, the kinetic energy of the block is transformed into internal energy .
The frictional movement of two surfaces over one another leads to the conversion of some of their kinetic energies to another energy - heat or thermal energy. Hence, the temperatures of the objects are raised in the process.
Therefore, when a sliding block is slowed down due to friction, some of the kinetic energy of the block would be transformed into internal energy in the form of heat.
The correct option is A.
after putting ice on top of the glass and submerging the glass at the bottom in how water,were you able to separate the glasses? what do you think happen on the molecules of theses glasses?
Answer:
Explanation:
The simultaneous expansion and contraction of the layers should nonstick even the most stubborn glassware!!
If two people are standing on the same scooter board and push off each other what happens? (Newton's 3rd law)
Answer:
The two people would fall down according to the laws of physics by Sir Issac Newton
Explanation:
Also write this (according to my unit I teach to my kids since I am a teacher but don't tell anyone): Just like if an apple were to fall, the tree would go upwards and the apple would fall. :)
Who would benefit from using a topographic map? Check all that apply
Military
Hikers
Geologists
Submarine divers
Cross Country runners
Airplane Pilots
A 6200kg African elephant charges at a speed of 10 m/s
What is the elephant kinetic energy
Answer:
310000
Explanation:
mass (m) = 6,200kg
speed (v) = 10m/s
kinetic energy = 1/2 × mass × speed 2
KE = 1/2 × m × v2
KE = 1/2 × 6200× (10)2
KE = 3,100 × 100
KE = 310,000 S
3) A 80Kg sled is being pulled with a force of 150N. The kinetic friction coefficient between the sled
and the snow is.125. What is the magnitude of Acceleration of the sled?
Answer:
[tex]a = 0.65\ m/s^2[/tex]
Explanation:
Net Force
There are four forces acting on the sled:
Its weight W directed down
The normal force N directed up
The applied force F directed left
The friction force, opposite to the motion, directed right.
The forces are shown in the free-body diagram of the figure below.
The body is in equilibrium in the vertical direction, thus:
N = W = m.g
N = 80 Kg . 9.8 [tex]m/s^2[/tex]
N = 784 Nw
In the horizontal direction, the sum of the force vectors is the net force:
Fn = F-Fr
It's assumed the left as positive.
The friction force is calculated as:
[tex]Fr =\mu_k . N[/tex]
Fr =0.125*784 Nw
Fr = 98 Nw
According to Newton's second law, the net force is equal to the mass by the acceleration:
F-Fr=m.a
The acceleration can be calculated by solving for a:
[tex]\displaystyle a=\frac{F-Fr}{m}[/tex]
[tex]\displaystyle a=\frac{150-98}{80}[/tex]
[tex]\mathbf{a = 0.65\ m/s^2}[/tex]
how does 1 horsepower compare to 1 watt power
Answer:
they both use power how much it has
Explanation:
i think
Answer:
1 horsepower is a unit of power equal to 746 watts 1 watt is a unit of power equal to 1 joule per second.
Explanation: Working on it for homework right now and using my textbook
Joey ran at a speed of 18 km/h for a total of 2 hours. How much distance did he
cover? -
Answer:
36km
Explanation:
In uniform circular motion, the factor that remains constant is.............
Answer:
When a body is in uniform circular motion, its speed remains constant but its velocity, angular acceleration, angular velocity changes due to change in its direction.
A 263 g ball of clay falls onto a vertical spring.
The spring constant k = 2.52 N/cm.
The clay sticks to the spring and as the spring compresses a distance of 11.8 cm the clay momentarily comes to rest.
Find the maximum compression of the spring, in [cm], if the initial speed of the clay doubled?
Answer:
d. According to the previous theorem:
(kh^2)/2-mgh-(m(2v)^2)/2=0,
126h^2-2.577h-8.236=0,
h=0.266 m.
Explanation:
The maximum compression of the spring should be 0.266 m.
Given that,
A 263 g ball of clay falls onto a vertical spring. The spring constant k = 2.52 N/cm. The clay sticks to the spring and as the spring compresses a distance of 11.8 cm the clay momentarily comes to rest.Based on the above information, the calculation is as follows:
[tex](kh^2)\div 2-mgh-(m(2v)^2)\div 2=0\\\\126h^2-2.577h-8.236=0,[/tex]
h=0.266 m
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1. Why is it dangerous to keep loose objects in the cabin
of your vehicle?
A. They will distract you from paying attention to the road.
B. They could be thrown into motion and injure someone in the
event of a sudden stop.
C. Your passengers could feel uncomfortable having them around.
Answer:
I would say A
Explanation:
I don't think it's B because depending on where it fell it might not go into motion and your passengers feeling uncomfortable isn't a danger
write the help of given diagram calculate the current through each resistor..
Answer:
[tex]i_A[/tex] = 3 A
[tex]i_B[/tex] = 1.8 A
[tex]i_C[/tex] = 1.2 A
Explanation:
Combined resistance of the resisters B and C,
[tex]\frac{1}{R'}=\frac{1}{R_1}+\frac{1}{R_2}[/tex] [Since [tex]R_1[/tex] and [tex]R_2[/tex] are attached in parallel]
[tex]\frac{1}{R'}=\frac{1}{4}+\frac{1}{6}[/tex]
[tex]\frac{1}{R'}=\frac{10}{24}[/tex]
R' = 2.4 Ω
Since, R' and resistor A are in series therefore, total resistance of both the resistors = 2 + 2.4
= 4.4 Ω
Now the current flowing in the circuit 'i' = [tex]\frac{E}{R+r}[/tex]
Here, E = E.M.F. of the cell
R = Total resistance of all resistors attached
r = Resistance of the cell
'i' = [tex]\frac{9}{2.4+0.6}[/tex]
i = 3 A
Current flowing in resistor A = 2 A
And Current in combined resistance of B and C = 3 A
Current flow in the resistors B and C will be in the ratio of C : B,
[tex]\frac{i_C}{i_B}=\frac{B}{C}[/tex]
[tex]\frac{i_C}{i_B}=\frac{4}{6}[/tex]
[tex]\frac{i_C}{i_B}=\frac{2}{3}[/tex]
Therefore, [tex]i_C[/tex] = [tex]\frac{2}{(2+3)}\times 3[/tex] = 1.2 A
[tex]i_B=\frac{3}{(2+3)}\times 3[/tex] = 1.8 A
The three elements of emotion are?
Answer: Physical component- state of physiological arousal triggered by autonomic nervous system
Behavioral component- outward expression of emotion, including facial expression and behavior
Cognitive component- appraisal of the situation determine which emotion we are experiencing and why.
Explanation:
hope that helps :)
The three elements of emotions are a subjective experience, a physiological response, and a behavioral or expressive response.
What are emotions?Emotions enable us to express our needs to others, such as when we are depressed and in need of assistance. They can also assist us in taking swift action when necessary.
For instance, panic causes you to jump back onto the curb when you're ready to cross the street, and you see a car approaching swiftly. Three components make up the “feeling” aspect of consciousness: a particular physical arousal, a particular conduct that communicates the feeling to others, and an internal awareness of the emotion.
Therefore, the elements of emotions are subjective experience, physiological response, and behavioral or expressive response.
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A car, initially traveling 10m/s, gains speed at a rate of 2m/s2 while traveling 56m. Find how long the car was traveling and the car’s final velocity.
Please show work very confused
Time travel = 4 s
The car’s final velocity : 18 m/s
Further explanationGiven
initial velocity=vo= 10 m/s
acceleration = a = 2 m/s²
distance=d = 56 m
Required
Time travel and the final velocity
Solution
time travel[tex]\tt d=vo.t+\dfrac{1}{2}at^2\\\\56=10.t+\dfrac{1}{2}.2.t^2\\\\56=10t+t^2\\\\t^2+10t-56=0\\\\(t-4)(t+14)=0\\\\t=4,t=-14\rightarrow take~a~positive~value~t=4~s[/tex]
the car’s final velocity.[tex]\tt v_f=v_i+at\\\\v_f=10+2.4\\\\V_f=18~m/s[/tex]
What are used for manufacturing paper along with wood and chemicals
Answer:
Paper and pulp are made from cellulosic fibers and other plant materials. Some synthetic materials may be used to impart special qualities to the finished product. Paper is made from wood fibers, but rags, flax, cotton linters, and bagasse are also used in some papers.
Why it is some times possible to loosen caps on screw
top bottles by dipping the cap briefly in hot water?
Answer:
Solids expand when they are heated.
Explanation:
It is possible to loosen caps on the screw top bottles by dipping the cap briefly in hot water due to the fact that whenever a solid is heated, it expands. This means that the size of the solid Screw cap (in this our case) increases as the temperature does.
This increase in size causes it to slide off easily from the mouth of the bottle when a little twisting effort is applied.
Which two statements explain reasons to use a computer program to encode
digital data?
A. Only authorized users can use these data.
B. The encoding makes digital data more secure.
C. It adds an extra step that takes more time.
n D. Encoded data can be changed by a computer virus.
Answer: A and B
Explanation: Because it makes the data you have secure and can only be authorized by you.
The computer program is encoded so that only authorized users can use these data and making digital data more secure. Therefore, option (A), (B) is correct.
What is encoding?Encoding and decoding can be used in communications, including computing, programming, data communications, digital electronics, and human communications. These two processes include converting the format of content for optimal transmission or storage.
In computers, encoding can be described as the process of putting a sequence of characters into a specialized format for efficient transmission or storage. Decoding can be described as the opposite process where the conversion of an encoded format back into the original pattern of characters.
The encoding process can be used in various patterns of digital signals on the transmission link. The common kinds of line encoding are Unipolar, Bipolar, Polar, and Manchester.
Encoding makes use of digital data more secure as only authorized users can use these data.
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Визначте ККД двигуна трактора (у відсотках), яким для виконання роботи 1,89∙106 Дж знадобилося 1,5 кг палива з питомою теплотою згоряння 4,2∙106 Дж/кг.
Відповідь:
30%
Пояснення:
Ефективність машини виражається за допомогою виразу:
Ефективність = Вихід / Робоча потужність × 100%
Результат роботи = 1,89 × 10 ^ 6 Джоулів
Вхідні дані = 1,5 × 4,2 × 10 ^ 6
Вхідні дані = 6,3 × 10 ^ 6
Підставимо у формулу:
Ефективність = (1,89 × 10 ^ 6) / (6,3 × 10 ^ 6) × 100%
Ефективність = 1,89 / 6,3 × 100
Ефективність = 189 / 6,3
Ефективність = 30%
Отже, ефективність двигуна трактора становить 30%
2.56x10-3 to m,cm,gm,mm and nm
Answer:
need help search it up
Explanation:
hehe..
I'm gonna need some help sorry :(
What is produced by converging trade winds?
easterlies
horse winds
trade winds
doldrums
Answer:
Doldrums
Explanation:
Trust me and need more to write to post answer
This is just a question so u can get points ʕ•ᴥ•ʔ
Answer:
Thank you so much!! for the points :)
oh tysm for z free points ʕ•ᴥ•ʔ
30 POINTS!!!
The engine of the "Slave 1" spaceship consumes 500 W of power in 10 s. If the craft travels 25 m, how much force is the engine using?
help! 50 points each and brainliest!!!
Atoms of iron (Fe) form metallic bonds with other iron atoms. How are the valence electrons of these atoms rearranged to form the bonds?
A few valence electrons are shared between the atoms.
Many valence electrons are shared between the atoms.
Electrons are transferred from the iron atoms to atoms in the air.
Electrons are transferred to the iron atoms from atoms in the air.
Answer:
Your answer is the following...
(b)"Many valence electrons are shared between the atoms"
Explanation:
Answer:
b
Explanation:
edge 2020
Explain why an electric discharge occurs
velocity of a body in circular or curved path is variable why give reason
only
Because "velocity" means the speed and direction of the motion.
In circular motion, or motion on any curved path, the direction is constantly changing. So even if the speed isn't changing, the velocity is.
If you count one by one till 100 in 1 minute, how long does it take to count till 1 billion? Convert your answer to seconds, hours, years.
Answer:
Probably like around 30 - 35 years, 100-250 days and 7-14 hours
Explanation:
On top of a 3 m tall shelf sits a lonely 4.5 kg toy snake. How much GPE does this snake have if the shelf is on Earth? (g = 9.8 m/s?
answer =
Answer:
GPE = Mgh = 132J
Explanation:
Mgh
4.5×9.8×3
132J
this is stupid but my brain isn't working right now so im counting on someone else
In the Arizona Desert, a sudden rainstorm washes sand and sediment into the Colorado River, which eventually deposits the sediments into the ocean. This process is called:
Answer:
Erosion and Transport
Explanation:
