What is the correct equation for velocity?
A. Velocity = displacement / time
B. Velocity = displacement * time
C. Velocity = Displacement - time
D. Velocity = displacement + time
Answers
Answer:
A
Explanation:
Took Test
The correct equation for velocity is Velocity = displacement / time. The correct option is A.
What is velocity?Velocity is the directional speed of a moving object as an indication of its rate of change in position as observed from a specific frame of reference and measured by a specific time standard.
Speed is the rate at which an object moves along a path in time, whereas velocity is the rate and direction of movement.
To calculate velocity, divide the distance by the time it takes to travel the same distance, then multiply by the direction.
For example, if you traveled 50 miles in one hour westward, your velocity would be 50 miles/1 hour westward, or 50 miles per hour westward.
Thus, the correct option is A.
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Related Questions
Read the passage.
The moon is one-fourth the size of Earth, and the moon’s gravity is about one-sixth of Earth’s. Less gravity and no atmosphere means that objects travel farther when thrown on the moon.
Based on the information provided, what visual information would be most helpful to include with the passage?
a chart comparing the sizes of the moon and the Earth
a diagram showing how gravity affects the path of a thrown object
a photograph of a child throwing a ball for a dog to catch
a graph comparing distances traveled by objects thrown on Earth and the moon
its d
Answers
Answer:
d in my opinion is the most opitmal answer
Explanation:
aka a graph comparing distances traveled by objects thrown on Earth and the moon
Answer:
Its d
Explanation:
a graph comparing distances traveled by objects thrown on Earth and the moon
1. (a) In reaching equilibrium, how much heat transfer occurs from 1.1 kg of water at 40°C when it is placed in contact with 1.1 kg of 20°C water? Specific heat of water c=4186 J/(kg°C) Hint: If th
Answers
The heat transfer that occurs from 1.1 kg of water at 40°C to 1.1 kg of water at 20°C is 92,270 J.
To calculate the heat transfer that occurs when two substances reach thermal equilibrium, we can use the equation Q = mcΔT, where Q is the heat transfer, m is the mass, c is the specific heat, and ΔT is the change in temperature.
In this case, we have two equal masses of water, each weighing 1.1 kg. The specific heat of water, c, is given as 4186 J/(kg°C).
First, we need to calculate the change in temperature, ΔT, which is the difference between the final equilibrium temperature and the initial temperature. Since the masses are equal, the equilibrium temperature will be the average of the initial temperatures, which is (40°C + 20°C) / 2 = 30°C.
Next, we can calculate the heat transfer for each mass of water using the equation Q = mcΔT. For the water at 40°C, the heat transfer is Q₁ = (1.1 kg) * (4186 J/(kg°C)) * (30°C - 40°C) = -45,530 J (negative because heat is transferred out of the water). Similarly, for the water at 20°C, the heat transfer is Q₂ = (1.1 kg) * (4186 J/(kg°C)) * (30°C - 20°C) = 137,800 J.
The total heat transfer is the sum of the individual heat transfers: Q_total = Q₁ + Q₂ = -45,530 J + 137,800 J = 92,270 J.
Therefore, the heat transfer that occurs from 1.1 kg of water at 40°C to 1.1 kg of water at 20°C is 92,270 J.
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Complete Question:
(a) In reaching equilibrium, how much heat transfer occurs from 1.1 kg of water at 40€ when it is placed in contact with 1.1 kg of 20€ water? Specific heat of water c=4186 J/(kg) Hint: If the masses of water are equal, what is the equilirium temperature of the water mixture?
Pls answer it ASAP I need it today
Activity 6: Write the uses of each cleaning compound.
1. Detergent-
2. Solvent cleaners-
3. Avid cleaners-
4. Abrasives-
Answers
Cleaning solvents are used to remove oil, grease, solder flux, and other contaminants.
Acid cleaners are generally used to remove mineral deposits and are useful for descaling dishwashers or removing rust from restroom facilities.
Abrasive uses
* Buffing.
* Honing.
* Drilling.
* Grinding.
* Sanding.
* Polishing.
* Cutting.
* Sharpening.
A dryer runs on 240 V with a resistance of 30.0 Ω. What is the current of the dryer?
Answers
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;
\( V = IR\)
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;
\( I = \frac {V}{R} \)
\( I = \frac {240}{30} \)
Current, I = 8 Amps
Therefore, the current of the dryer is 8 Amperes.
of the charge q initially on a tiny sphere, a por tion q is to be transferred to a second, nearby sphere. both spheres can be treated as particles and are fixed with a certain separation. for what value of q/q will the electrostatic force between the two spheres be maximized?
Answers
The value of q/Q for which the electrostatic force between the two spheres will be maximized is 0.5 .
What is called electrostatics?Electrostatics is a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges. Electrostatic phenomena arise from the forces that electric charges exert on each other and are described by Coulomb's law.
What is electrostatic charge?Electrostatic charges. Static electricity or an electrostatic charge is a deficiency or excess of electrons which occurs on ungrounded or insulating surfaces. It is produced by triboelectric charges, charges that are generated by friction between two surfaces, such as the movement of paper through a copier or printer
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What statement best describes the situation in the diagram
Answers
The forces are balanced and the book is at rest.
Explanation:
When the forces (amount of Newtons) on an object are equal and in opposite directions, the forces are balanced, and there is no change in motion.
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what is the speed in km/hr of a car traveling 144 km in 90 minutes?
Answers
Answer
96mph
Explanation:
You are given "144 miles in 90 minutes" and what you need to figure out is "144 km in X hours." To go from 90 min to hours, you can do 90 min * 1hr/60min = 1.5 hrs or 144 km in 1.5 hrs or 144 km per 1.5 hours. 144/1.5 = 96.
what major factor leads to a decrease in entropy as the reaction shown takes place?
Answers
The major factor that leads to a decrease in entropy as the reaction takes place is the formation of a more ordered or organized system.
Entropy is a measure of disorder or randomness in a system. The more disordered a system is, the higher its entropy. In the case of a chemical reaction, if the products are more organized or ordered than the reactants, there will be a decrease in entropy. This is because the reactants have more possible arrangements or configurations than the products, which have a more specific or limited arrangement.
For example, if a gas is converted to a liquid or solid, the particles become more organized and the entropy decreases. Additionally, if molecules come together to form a larger molecule or compound, the degree of freedom of motion of the molecules decreases, and entropy decreases. Therefore, any process that leads to a more ordered or organized system will result in a decrease in entropy.
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What are the wavelengths of x-rays and gamma rays?
a.
x-rays - 3 pm to 20 nm
gamma rays- less than 3 pm
c.
x-rays - 3 mm
gamma rays- 20 to 50nm
b.
x-rays - 400nm
gamma rays- 700nm
d.
None of the above
Answers
Answer:
1. less. 2 greater. 3. the same. 8. An FM radio station broadcasts its signal at a fre- ... wave 3. | 3x108 = 269.15x107). = 3.20m. 2. An electromagnetic AM-band radio wave could have Base your answers to questions 9 and 10 on the informa- ... X rays. -Microwaves. -Long
What is the relationship between frequency and amount of energy ? Give an example using number of HZ (Properties of Wave's on Summit)
Answers
The relationship between frequency and amount of energy is:
amount of energy = Plank's constant × frequency of the EM wave.
What is electromagnetic wave?When an electric field interacts with a magnetic field, electromagnetic waves are created. Therefore, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles).
The relationship between frequency and amount of energy is:
amount of energy = Plank's constant × frequency of the EM wave.
Where Plank's constant is 6.626 × 10⁻³¹ Joule/Hz, Hence, a wave of 1 Hz frequency have 6.626 × 10⁻³¹ Joule of energy.
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The figure shows three 0.0121 kg particles that have been glued to a rod of length L=6.09 cm and negligible mass. The assembly can rotate around a perpendicular axis through point O at the left end. If we remove one particle (that is, 33% of the mass), by what percentage does the rotational inertia of the assembly around the rotation axis decrease when that removed particle is (a) the innermost one and (b) the outermost one?
Answers
The rotational inertia of the assembly decreases by 14.9% when the innermost particle is removed and 49.2% when the outermost particle is removed.
The rotational inertia of an assembly is calculated by the sum of each particle's moment of inertia, which is calculated by its mass multiplied by the square of its distance from the axis of rotation. When one particle is removed from the assembly, the rotational inertia decreases by a percentage equal to the amount of mass removed multiplied by the square of the distance of that particle from the axis of rotation.
For the innermost particle, since it is closest to the axis of rotation, its removal will cause the greatest decrease in rotational inertia. The percentage decrease in rotational inertia when the innermost particle is removed would be 33% x (0.0121 kg x (3.045 cm)2) / (0.0363 kg x (6.09 cm)2) = 14.9%.
For the outermost particle, since it is farthest from the axis of rotation, its removal will cause the smallest decrease in rotational inertia. The percentage decrease in rotational inertia when the outermost particle is removed would be 33% x (0.0121 kg x (9.135 cm)2) / (0.0363 kg x (6.09 cm)2) = 49.2%.
In summary, the rotational inertia of the assembly decreases by 14.9% when the innermost particle is removed and 49.2% when the outermost particle is removed.
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Velocity is different from speed because it has size and what?
Answers
Answer:
direction
Explanation:
Room temperature is about 77°F. Which temperature is an equivalent temperature?
Answers
Answer:25
Explanation:
Formula(77°F − 32) × 5/9 = 25°C
Answer: The answer is C. 298 K
Explanation:
object's velocity will not change unless it is acted on by a(n)
O net force.
O strong force.
O unbalanced force.
O opposite but equal force
Answers
Reasoning: Newton’s First Law of Motion (The Law of Inertia)
boy uses a simple pulley to pull a block up a ramp. The height of the ramp is 4 m and the length of the ramp is 10 m. Calculate the mechanical advantage of the ramp and does the pulley provide any additional advantage?
Answers
(a) The mechanical advantage of the ramp is determined as 2.5.
(b) The pulley provides additional advantage since it assisted the boy in pulling up the load.
What is mechanical advantage?The mechanical advantage of an object is the ratio of output force to input force, hence it is called force ratio.
Mechanical advantage of the rampM.A = Lp/h
where;
Lp is the length of the inclined planeh is height of the inclined planeM.A = 10/4
M.A = 2.5
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An apple is thrown across the cafeteria with a force of 10 N and at an acceleration of 6 m/s2. What is the mass of the apple? ... please answer asap
Answers
Answer:
Explanation:
F = m * a
The apple's acceleration is not influenced by the acceleration due to gravity for this question. In real life it most certainly is influenced by gravity.
F = m * a
F = 10 Newtons.
a = 6 m/s^2
m = 10/6 = 1.66 kg. Mighty large apple
What is the weight of an astronaut with a mass of 75 kg on the moon? The gravitational field strength on the moon is 1.6 Nkg-1.
Answers
Answer:
122.5
Hope it helps you actually I have same question
I have the answer but no process
You may have already used the Blackbody Spectrum simulation to see how the temperature of a substance affects how light is emitted. Many of the light sources you’re familiar with are incandescent light sources. They glow because they have a nonzero temperature. The hotter the source, the more radiant energy it gives off. Now, let’s explore a few different incandescent energy sources and investigate their lighting efficiency. In this simulation, the curve represents the radiation intensity and energy emitted with respect to the wavelength at a given temperature.
To begin, launch the Blackbody Spectrum simulation.
Answers
The Blackbody Spectrum simulation allows us to explore how the temperature of incandescent light sources affects their emitted light.
First, discuss the relationship between temperature, radiant energy, and lighting efficiency.
Incandescent light sources emit light due to their nonzero temperature. As the temperature of the source increases, the amount of radiant energy it gives off also increases. The Blackbody Spectrum simulation helps us visualize how the temperature of a substance affects the way light is emitted.
In the simulation, a curve represents the radiation intensity and energy emitted with respect to the wavelength at a given temperature. As the temperature rises, the curve's peak shifts towards shorter wavelengths, and the area under the curve increases. This shift indicates that the emitted light becomes more energetic and intense.
However, not all of this emitted energy is in the visible spectrum; a significant portion can be in the form of infrared radiation (heat). Incandescent light sources are not very energy-efficient, as a large portion of their energy output is wasted as heat rather than visible light. The lighting efficiency of an incandescent source is determined by the percentage of radiant energy that falls within the visible spectrum.
To summarize, the Blackbody Spectrum simulation allows us to explore how the temperature of incandescent light sources affects their emitted light. As the temperature increases, the emitted radiant energy also increases. However, a considerable amount of energy is lost as heat, making incandescent sources less energy-efficient compared to other lighting technologies.
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Define Initial velocity.
Answers
Answer:
Initial velocity is defined as the velocity at time t=0.
Its Unit is m/s.
represented by u.
calculated by using formula.
v=u+at
u=v-at.
Answer:
Initial velocity is the velocity which the body has in the beginning of the given time period
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if a rock weighs 75.0 n on earth, what would it weigh at the surface of venus? express your answer in newtons.
Answers
The weight of the rock at the surface of Venus is 66.5 N
What is the weight of the rock at the surface of Venus ?
On earth,
The weight of the rock at the surface of earth = 75 N
The weight of an object on earth's surface is:
W = m g
Here, m = mass of rock
acceleration due to gravity (g) = 10 m/s²
W= mg
m = \(\frac{W}{g}\)
m = \(\frac{75}{10}\)
m = 7.5 kg
On Venus,
mass (m) = 7.5 kg
acceleration due to gravity(g) = 8.87 m/s²
W= mg
= 7.5 * 8.87
=66.5 N
What is acceleration due to gravity?
The acceleration that an object experiences because of gravitational force is referred to as acceleration owing to gravity. The SI equivalent is m/s².It is a vector quantity as it has both magnitude and direction. g stands for the acceleration brought on by gravity. On Earth's surface, g has a standard value of 9.8 m/s² at sea level.To learn more about acceleration due to gravity, refer:
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Find the average net force.
Answers
Answer:
givenmass= 3.5 kg
distance covered= 0.4m
inital speed = 1.5 m/sec
final speed = 0 m/sec
To findnet force
solutionformula for force :
\( \fbox{f = m.a}\)
In order to find the force we need to find the acceleration.
According to third equation of Kinematics-
\( \bold{ {v}^{2} = {u}^{2} + 2as}\)
where,
v= final velocity
u=inital Velocity
a=Acceleration
s=Distance covered
put the value in the above equation
0= (1.5)²+ 2a x 0.4
-2.25= 0.8a
a = -2.25/0.8
a= - 2.8125 m/sec²
now put the value 0f accleration in formula of force
F = m.aF = 3.5 x - 2.8125
F= -9.84375 N
how does the vertical speed of the point compare to the speed of the wave? how does the vertical speed of the point compare to the speed of the wave? the wave speed equals the point speed multiplied by the wavelength and divided by the string's length. the speed of the point is 2 times greater than the wave speed. the speed of the point equals the wave speed multiplied by the wavelength and divided by the string's length. the speed of the point could be neglected compared to the wave speed. the wave speed could be neglected compared to the speed of the point. the speeds could not be uniquely compared, because there is no fixed relationship between them.
Answers
The vertical speed of the point compare to the speed of the wave is that the speeds could not be uniquely compared, because there is no fixed relationship between them.
About Wave SpeedWave speed is the ratio between the displacement of one wavelength and its period. The magnitude of the speed of the wave is the ratio between the distance of one wavelength and the period.
The wave speed formula is the wavelength divided by the wave period or written v = λ/T. The symbol λ (lambda) is the wavelength which has units of meters (m). While T is the wave period having units of seconds (s). So, the unit of wave speed is m/s.
Wavelength (λ) is the distance between successive peaks or peaks or the distance between successive bottoms. Meanwhile, the wave period (T) is the time required for the occurrence of one wave, namely the time that passes between successive peaks that pass through the same point in space.
You can also calculate wave speed using frequency (ƒ), which is the number of waves in one second. The unit of frequency is Hertz (Hz), the formula is T = 1/ƒ or ƒ = 1/T so that the wave speed formula can also be written v = λƒ.
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A vehicle undergoes acceleration when it
Speeds up
Slow down
Change direction
All of the above
Answers
Answer:
ALL OF THE ABOVE
Explanation:
A vehicle undergoes acceleration when what three things happen?
it gains speed, decreases speed, and changes direction .If there is acceleration, the velocity will change, either increasing or decreasing. The correct answer is D.
What is acceleration?The rate of growth of velocity is defined as acceleration. Acceleration usually indicates that the speed is changing, but this is not always the case. When an object is in motion in a circular track at a steady speed, it is still going to accelerate because its velocity direction changes.
Newton's Second Law states that an object's acceleration is the net result of all force applied to it. Acceleration is measured in meters per second squared.
The formula is given as,
a = Δv / Δt
If acceleration exists, the change of the velocity will be there and it may be increasing or decreasing. Then the correct option is D.
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Amy and ellie left school at the same time, but she and ellie arrived at their homes at the same time. compare the girls speeds. use evidence of the distance each girl travels at the time it takes to travel that distance to support your claim. explain your reasoning.
Answers
our best data about the surface topography of venus has come from:
Answers
The best data about the surface topography of Venus has come from various missions and instruments sent by different space agencies. The first spacecraft to provide information about Venus was NASA's Mariner 2, which made a flyby in 1962.
However, it was the Soviet Venera missions that provided the most detailed information about the planet's surface in the 1970s and 1980s. The Venera probes used radar to map the surface, revealing that Venus has vast volcanic plains, impact craters, and mountain ranges. Later missions, such as NASA's Magellan spacecraft in the 1990s, provided even more detailed maps of Venus' surface topography using advanced radar imaging techniques.
With these missions, scientists have been able to study the geology and morphology of Venus, including its thick atmosphere, which has made it difficult to observe the surface with visible light. Overall, the data collected from these missions has greatly improved our understanding of Venus and its unique topography.
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help please! this is physics !
Answers
Answer:
4. The choose b. 0.000355
Ans; 3.55× 10-⁴ = 0.000355
5. The choose C. 80600
Ans; 8.06 ×10⁴= 806×10² = 80600
I hope I helped you^_^
First if the power is negative, move the decimal to the left. And you move the decimal by the number on the power. So you move 4 to the left. Same goes for the other except it’s positive so you go 4 to the right.
The distance between 2 successive crests of a water travelling at 3.6m per second is 0.45m. calculate the frequency of the wave
Answers
Answer:
8 hz
Explanation:
Wave Frequency = \(\frac{velocity}{wavelength}\)
\(F=\frac{3.6}{0.45} = 8\)
You need to move a large refrigerator. It has a mass of 300 kg. You want to accelerate it at a rate of 3 m/s/s. What force must you apply?
Answers
Answer:
900 N
Explanation:
F = ma
= 300 (3) = 900 N
A liquid having mall depth but large volume is force by an applied pressure p above it escape with velocity v through a small hole below the velocity v is given by:v=cpxdy where c,x and y are dimensionless constants, determine x and y
Answers
Answer:
im not to sure about it
maybe check online
the oven starts at the same temperature and pressure of as the air outside. the oven has a roughly cubic shape with each side measuring . the air inside the oven is heated to . assume, for simplicity that no air escapes during this process (in a real oven this isn't quite was happens -- can you see a problem with not letting air vent during the heating process?) what is the change in thermal energy (in ) of the air in the oven?
Answers
The oven starts at the same temperature and pressure of as the air outside. the oven has a roughly cubic shape with each side measuring . the air inside the oven is heated to
The change in thermal energy of the air in the oven, we need to know the initial temperature, final temperature, and the volume of the oven. However, the provided information is incomplete. Please provide the measurements for each side of the oven, as well as the initial and final temperatures.
Regarding the problem of not letting air vent during the heating process, it can lead to an increase in pressure inside the oven. As the air inside the oven heats up, it expands and its pressure increases. If there's no vent to release this increased pressure, it may cause the oven to become damaged or even explode due to the excessive pressure build-up.
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