An actual velocity is measured directly from an object's displacement-time graph while a theoretical velocity is calculated by using a mathematical equation or scientific theory.
Velocity refers to the rate of change in displacement (distance) of an object with respect to time.
Also, velocity is a vector quantity and this simply means that, it has both magnitude (speed) and direction.
Mathematically, velocity is given by the formula;
[tex]Velocity =\frac{displacement}{time}[/tex]
In an experiment, there are two (2) main types of velocity used and these include:
Actual velocity: it is a velocity that is measured directly from a displacement-time graph and it represents the true velocity of an object or physical body.Theoretical velocity: this is a type of velocity that is taken as an accepted (known) value of velocity because it is determined by using a mathematical equation or scientific theory.In conclusion, an actual velocity is measured directly from an object's displacement-time graph while a theoretical velocity is calculated by using a mathematical equation or scientific theory.
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I need help and I don't understand if you can help me but let it be before 6:00
Answer:
balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree
unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground
Explanation:
all the balanced ones are either moving at a constant speed or are skill
all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah
can you help me with this??
Answer:
i want to say flip the coins but im not really sure sry
Explanation:
the first thing you should always do when you're solving a problem is draw whats known as a?
A car speeds up from 0.00 m/s to 60.0
m/s in 8.53 s.
The acceleration of the car is:
A. 512 m/s2
B. 8.53 m/s2
C. 68.5 m/s2
D. 7.03 m/s2
A boy threw a small bundle toward his girlfriend on a balcony 10.0 meters above him.the bundle stooped rising in 1.5 seconds.how did the bundle travel ?
please help!!!!!!!!!!!!!!!!!!!!!!
Answer: I'm sure the answer is a.
Explanation: I hope that helped you.
Answer:
Precipitate
Explanation:
Which of the following is a location with a high probability of containing an electron?
O orbital
O proton
O Bohr
Answer:
The answer is orbitial! :))
Answer:
it's orbitial
Explanation:
Choose the best description of the attraction between you and your classmate.
A. There is no attractive force
B. It was large enough to feel the attraction
C. extremely small (1.8 x 10-8 N)
D. There is not enough information to answer this question
Answer:
The correct option is;
D. There is not enough information to answer this question
Explanation:
The universal gravitational constant = 6.67408 × 10⁻¹¹ 3³/(kg·s²)
For an in between distance of 1 m and equal masses of 60 kg, we have;
[tex]F = G \times \dfrac{m_{1} \times m_{2}}{r^{2}} = 6.67408 \times 10^{-11} \times \dfrac{60 \times 60}{1^{2}} \approx 2.403 \times 10^{-7} N[/tex]
The gravitational attraction ≈ 2.403 × 10⁻⁷ N, which does not correspond with the answers, therefore, the best option is that there is not enough information to answer this question.
The evaporation of the oceans surface water as part of the water cycle is a process caused by A) Magnetism B) axial tilt C) solar radiation D) Earth's gravity
Answer:
(C) Solar radiation
Explanation:
The water cycle is driven by solar energy that produces solar radiation and this drives water from ocean surface , rivers, lakes, soil and plants through transpiration , which then forms clouds and water falls back on earth as precipitation.
Answer:
c i took the test
Explanation:
A student tries to measure the period of a pendulum that is already swinging
left and right. At the moment when the pendulum is fully to the left, she
counts 'One' and starts a stopwatch. She counts successive swings each time
that the pendulum returns to the left. When she counts ‘Ten' she stops the
stopwatch, and sees that it reads 12.0 s.
a. What was her mistake?
______________________________________________________________
b. What is the period of swing of this pendulum?
______________________________________________________________
c. In this particular experiment, explain the likely effect of her reaction time
on her answer.
Answer:
a. The student's mistake was that the student did not swing the pendulum and start the watch at the same time.
b. 1.2 s per swing.
c. The likely effect of her reaction time is that they will should subtract two seconds off the time.
Explanation:
The pupil made the error of not simultaneously starting the watch and swinging the pendulum.
What is pendulum?Pendulum is defined as a body that is suspended from a fixed point and moves back and forth while being pulled by gravity. The pendulum is used to gauge the gravitational pull because the force of gravity causes it to swing back toward its average position. A pendulum's time period can be used to tell the time because it is constant.
The swing of the pendulum is 1.2 sec. per swing. They should take two seconds off the timing due to her presumably slow reaction time. A pendulum's total time should be divided by the quantity of oscillations in order to determine its time period. When compared to a pendulum with a shorter string, the one back and forth cycle of a longer-stringed pendulum requires more time to complete.
Thus, the pupil made the error of not simultaneously starting the watch and swinging the pendulum.
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why are people so rude/
Answer:
Some people have went through some things, but people will be people. I've heard people are born neutral, but are affected by the environment they live in.
Explanation:
I need help asappp!!! Help b trcrcrhhvvcc
Answer:
the answer is c. hope this help you out
How could sound waves damage solid objects like a spacecraft?
Can I have help please , ASAP?
Could someone help me? A cannon is fired with an initial horizontal velocity of 20 m/s and initial vertical velocity of 25 m/s . After 3s in the air, the canon hits its target. How far away was the canon from its target?
A high jumper leaves the ground with an initial velocity of 10 m/s rightward at an angle of 15 degrees . What is the high jumper's initial horizontal velocity?
11. Which of the following is a proper unit of
acceleration?
A) s/km2
C) m/s2
B) km/h
D) cm/s
Answer:
I'm pretty sure it's c. I remember seeing a question like this and I think it was C
Explanation:
A dryer runs on 240 V with a resistance of 30.0 Ω. What is the current of the dryer?
Answer:
Current, I = 8 Amps
Explanation:
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
Given the following data;
Resistance, R = 30 ohms
Voltage, V = 240V
To find the current;
[tex] I = \frac {V}{R} [/tex]
[tex] I = \frac {240}{30} [/tex]
Current, I = 8 Amps
Therefore, the current of the dryer is 8 Amperes.
Students in a science class were provided with this image and asked to identify which color of light would refract the most if white light was passed through a prism?which student below identified the correct color of light with the proper justification?
The identification of the correct color of the light with the proper justification would be by student 4: violet, because it has the highest frequency, therefore the correct answer is option D.
What is Wavelength?It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
As given in the problem, students in a science class were provided with this image and asked to identify which color of light would refract the most if white light was passed through a prism.
Student 4 would correctly identify and justify violet as the appropriate hue of the light since it has the greatest frequency, making option D the right response.
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A block of cheese Bhangs from the ceiling by rope 1 A wheel of cheese Whangs from the block of
cheese by rope 2
What is the correct free body diagram for the block of cheese B?
URGENT
Answer:
Explanation:
KHAN ACADEMY
The correct free body diagram is option (B). There will only be two forces acting on cheese B.
Given that Cheese B hangs on rope 1. The weight of the cheese is balanced by the tension force on the rope. That is, the cheese experiences a force in the upward direction due to the tension on rope 1.Similarly, a wheel of cheese W hangs from block B by a rope 2. This rope has a tensional force that is balanced by the weight of the cheese W. This causes a downward pull on block B due to the tension on rope 2.By representing the tensional forces by the ropes 1 and 2 as [tex]F_{T1}[/tex] and [tex]F_{T2}[/tex] respectively, the correct free body diagram will be option B.
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A large truck of mass 5000 kg is travelling at 5.0 m/s.
A motorbike has a mass of 200 kg. Both the truck and the motor bike have the same kinetic energy
What is the speed of the motorbike?
A 25 m/s
B 10 m/s
C 125m/s
D 2.5 m/s
Answer:
A - 25m/s
Explanation:
The velocity of the motorbike will be 25 m/s in order to ensure that the truck and the motor bike have the same kinetic energy.
What is Kinetic Energy?The kinetic energy of the body is by the virtue of its motion.
Given is a large truck of mass 5000 kg which is travelling at 5.0 m/s and a motorbike that has a mass of 200 kg. Both the truck and the motor bike have the same kinetic energy.
The Kinetic energy of the truck will be -
E[T] = 1/2 mv² = 1/2 x 5000 x 25 = 2500 x 25 = 62500 joules
Then Kinetic energy of the motorbike will be -
E[M] = 1/2 x 200 x v²
E[M] = 100v² joules
Now-
E[T] = E[M]
100v² = 62500
v² = 625
v = 25 m/s
Therefore, the velocity of the motorbike will be 25 m/s in order to ensure that the truck and the motor bike have the same kinetic energy.
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*
4. True/False: At the aphelion there is the STRONGEST gravitational pull.
10 points
True
False
i think the answer is true i hope u get it correct
Lorries sometimes have a curved metal sheet fitted on top of the cab. Explain why as fully as you can ?.
Explanation:
A vehicle frame, also known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.
Until the 1930s, virtually every car had a structural frame separate from its body. This construction design is known as body-on-frame. Over time, nearly all passenger cars have migrated to unibody construction, meaning their chassis and bodywork have been integrated into one another.
Nearly all trucks, buses, and most pickups continue to use a separate frame as their chassis
How can damage to living things occur from exposure to X-rays or gamma
rays?
A. The human body can overheat.
B. The human body can give off thermal energy,
C. Atoms and molecules in the body can be ionized.
D. Bad cases of sunburn can occur.
Answer:
C. Atoms and molecules in the body can be ionized.
Explanation:
The exposure to X-rays or gamma rays can ionized the atoms and molecules present in the living things like humans.
What is X-rays?X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates pictures of the inside of your body.
What is gamma rays?A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.
Gamma rays can pass completely through the human body; as they pass through, they can cause ionizations that damage tissue and DNA.
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A balloon is rubbed on someone's hair, then placed next to a stream of water. The balloon has an overall negative charge. The water has a neutral charge. What happens to the water
It bends away from the balloon due to induction
It moves away from the balloon due to induction
It moves toward the balloon due
It bends toward the balloon due to induction
Answer:
If I'm right it bends away
Explanation:
I learned this in class before it was fun to me
The car travels 25 miles in the first 0.5 hours
of the journey. Calculate its mean speed for
this part of the journey.
Answer:
[tex]\huge\boxed{\sf v = 50\ miles / hr}[/tex]
Explanation:
Given Data:
Distance = S = 25 miles
Time = t = 0.5 hours
Required:
Speed = v = ?
Formula:
v = S/t
Solution:
v = 25 / 0.5
v = 50 miles / hr
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807
HELP ASAP!!! PLEASE!!!
Which of the following is NOT a requirement of a good test?
A) Heritability
B) Validity
C) Standardization
D) Reliability
I could not find the answer online because it is saying an answer choice that is not there please help!!
A) Heritability is NOT a requirement of a good test. Option A is correct.
What is a requirement of a good test?Validity, Standardization, and Reliability are commonly considered requirements of a good test.
A) Heritability refers to the proportion of variability in a trait that can be explained by genetic factors. It is a statistical concept used in the field of genetics and is not a requirement for a good test.
B) Validity refers to the extent to which a test measures what it is intended to measure.
C) Standardization refers to the process of administering a test in a standardized manner to ensure that the results are comparable across different people or groups.
D) Reliability refers to the consistency of the results obtained from a test, i.e., the extent to which a test gives consistent results when repeated under the same conditions.
These three (B, C, and D) are commonly considered requirements of a good test.
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Q2 ) Starting from rest on a level road a girl can reach a speed of 5m/s in 10 s on her bicycle, find
A) the acceleration
Answer:
0.5m/s²
Explanation:
Given parameters:
Initial velocity = 0m/s
Final velocity = 5m/s
Time taken = 10s
Unknown:
Acceleration of the bicycle = ?
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Insert the parameters and solve;
Acceleration = [tex]\frac{5-0}{10}[/tex] = 0.5m/s²
An aeroplane accelerates from rest at a rate
of 25m/s² for 3 s .calculate final velocity
Answer:
The final speed is 75 m/s
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes uniformly in time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at[/tex]
The airplane comes from rest (vo=0) accelerating at a=25 m/s^2 for t=3 s.
The final speed is:
[tex]v_f=0+25~m/s^2\cdot 3~s[/tex]
[tex]v_f=75~m/s[/tex]
The final speed is 75 m/s
What can cause the formation of a magnetic domain?
A. The magnetic fields of nearby atoms being aligned with each
other
B. Magnetic field lines passing through the center of a magnet
C. A metal being attracted to the pole of a magnet
O D. A magnet being cut in half many times to form many smaller
magnets
Answer:
The magnetic fields of nearby atoms being aligned with each other
Explanation:
took the quiz c:
For a magnetic domain to be formed in a molecule, it follows that the magnetic fields of nearby atoms are being aligned with each other.
What is a magnetic domain?The term magnetic domain refers to the arragement in the magnetic material which allows the material to be magnetic in nature.
For a magnetic domain to be formed in a molecule, it follows that the magnetic fields of nearby atoms are being aligned with each other.
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answer them all please!!
Answer:
Digestive = large instestine
respiratory = lungs
circulatory red blood cell
neurons=nerves
Explanation:
Based on its location on the periodic table, which element could be used for
electrical wiring?
A. Argon (Ar)
B. Bromine (Br)
c. Aluminum (AI)
D. Phosphorus (P)
