Answer:
B
Explanation:
Answer:
c. the acceleration is constant and positive
Explanation:
A cyclist moves a distance of 30 m from points A to B in a straught line towards East with a speed of 10 m/s. He then moves a distance of 40 m from points B to C in a straight line towards North with a speed of 20 m/s. Calculate the cyclist's (1) Average Speed, (2) Average Velocity, for the whole journey
Answer:
Average speed is 14 m/s and average velocity is 10 m/s.
Explanation:
The time consumed to travel from A to B = Distance / Speed = 30 / 10 = 3 seconds
The time consumed to travel from B to C = Distance / Speed = 40 / 20 = 2 seconds
Now, we find the average speed by using the below formula.
Average speed = total distance / total time
Average speed = (30 +40) / (3 + 2)
Avergae speed = 70 / 5 = 14 m/s.
Now find the average velocity.
Average velocity = displacement / time
Displacement, distance between A to C = [(30)^2 + (40)^2]^1/2 = 50 m
Average velocity = 50 / (3+2) = 10 m/s
Sliding a box is work against friction. Answer in short.
Answer:
Sliding a box is work against friction because force applied to move the box is in oppose of friction.
Using this equation: LaTeX: v\:=\frac{\Delta x}{\Delta t}v = Δ x Δ t, solve for LaTeX: \Delta tΔ t Group of answer choices LaTeX: \Delta t\:=\frac{v}{\Delta x} Δ t = v Δ x Δ t = v Δ x LaTeX: \Delta t\:=\Delta x\:.\:v Δ t = Δ x . V Δ t = Δ x . V LaTeX: \Delta t\:=\frac{\Delta x}{v} Δ t = Δ x v LaTeX: \Delta t\:=\Delta x-v
Answer:
[tex]\Delta t = \dfrac{\Delta x}{v} \\\\[/tex]
Explanation:
Given the expression [tex]v\:=\dfrac{\Delta x}{\Delta t}[/tex], we are to find the value of Δt from the expression. To find Δt, we will make Δt the subject of the formula from the given expression as shown;
[tex]v\:=\dfrac{\Delta x}{\Delta t}\\\\cross\ multiply\\\\v*\Delta t = \Delta x\\\\Divide \ both\ sides \ of\ the \ resulting \ equation \ by \ v\\\\\dfrac{v*\Delta t}{v} = \dfrac{\Delta x}{v} \\\\\Delta t = \dfrac{\Delta x}{v} \\\\[/tex]
Hence the equivalent expression for [tex]\Delta t = \dfrac{\Delta x}{v} \\\\[/tex].
This is a science Question. Please help.
Answer:
B
Explanation:
This is a physics question, know that force is equals to mass divided by acceleration (acc.), so if the same force is applied, say 10 Newton and the mass of A is 2 and the mass of B is 4, then the acceleration of A is 0.2 and that of B is 0.4 by equating, and this applies to all cases.
Air is _______________ and not _______.
A tennis ball moves 18 meters northward, then 22 meters
southward, then 14 meters northward, and finally 28 meters
southward.
What is the magnitude and direction of the displacement
Answer:
Magnitude = 18 m
Direction = southward
Explanation:
Given that a tennis ball moves 18 meters northward, then 22 meterssouthward, then 14 meters northward, and finally 28 meters
southward.
To calculate the displacement, let the
Northward = positive direction
Southward = negative direction
Displacement = 18 - 22 + 14 - 28
Displacement = 32 - 50
Displacement = - 18
Since the answer is negative,
The magnitude will be 18 m and direction of the displacement is southward
How long would it take a car going 50 km/h to travel 70 km ?
Answer:
Hey there!
d=rt
t=d/r
t= 70/50, or 1.4
It would take the car 1.4 hours to travel 70 km.
Let me know if this helps :)
Can someone help me with this motion graph please
Answer:
24 meters
Explanation:
From 0 - 4 secs. the distance traveled forward 8 meters. From 4 - 6 secs. the distance traveled another 8 meters forward. Then from 6 - 10 secs. the distance traveled backward 8 meters for a total of 24 meters.
Describe two of Tesla's inventions that influenced
technology and are still in use today.
Answer:
Tesla perfected alternating current (AC) technology, which now provides electricity to all homes and appliances. He developed the fluorescent lightbulb, which is energy-efficient and cost-effective. The electric motor, which he invented, now powers appliances, machines, tools, and some cars. Tesla also built a hydroelectric power plant to generate electricity from the force of water. Tesla also studied X-rays, radios, and wireless technology.
Explanation:
i just answered it this is the sample response believe me edge 2021
75 kg + 1352 g = ______________g?
Answer:
76352 g
Explanation:
Start by reducing the first quantity to grams, since a) additions can not be performed among quantities given in different units, and b) the answer is required in grams so better to express everything in grams.
75 kg = 75000 g
Then the addition becomes: 75000 g + 1352 g = 76352 g
Three students attempt to define what it means for lines lll and mmm to be perpendicular. Can you match the teacher's comments to the definitions? Definition of perpendicular lines Teacher's comments
Incompletevquestion. However, I inferred from a general perspective about perpendicular lines.
Explanation:
Put simply, perpendicular lines are lines that are at right angles (90°) to each other. Thus, we could say based on this definition that for lines lll and mmm to be perpendicular they intersect and be at right angles (90°) to each other as found on the attached image.
Answer:
Daniela's Definition: AB is perpendicular to CD if the measure of <AOC equals the measure of <AOD.= Well Done! Because the measure of <COD...
Ori's Definition: AB is perpendicular to CD if AB and CD intercept perfectly sideways.= Please rework your ….
Kaori's definition: AB is perpendicular to CD if one line can be mapped to the other by a rotation about point O of 90 degrees.= Well done! I hadn't previously considered defining...
Explanation:
Kahn Academy
The fins of a car radiator are painted black because black objects are good?
Answer:
because it emits the most heat thru radiation
In an element’s square on the periodic table, the number with the greatest numerical value represents the
number of neutrons.
number of electrons.
atomic number.
atomic mass
Answer:
Atomic mass I Just did the quiz and got 100% for edge
According to Newton’s third law of motion, what happens whenever one object exerts a force on a second object?
Answer:
When one object exerts a force on another object, the second object exerts the same size force on the first object
Explanation:
Which option is a force? O A. Mass O B. Velocity O C. Acceleration O D. Weight
Answer:
The answer is D
Explanation:
The answer is D because weight has a lot of amount of force.
Answer:
the answer is D
What is the kinetic energy of a 150 kg bear running at 3 m/s?
Explanation:
KE = ½ mv²
KE = ½ (150 kg) (3 m/s)²
KE = 675 J
The kinetic energy of a 150 kg bear running at 3 m/s would be 67.5 Joules.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy
ME = KE + PE
As given in the problem we have to calculate the kinetic energy of a 150 kg bear running at 3 m/s
K.E =?
m = 150 kg
v = 3 m/s
The total kinetic energy is given by the formula
KE = 1/2mv²
By substituting the respective values in the formula of kinetic energy
K.E =?
m = 150 kg
v = 3 m/s
KE =1/2×150×3²
KE= 67.5
Thus, The kinetic energy of a 150 kg bear running at 3 m/s would be 67.5 Joules.
Learn more about mechanical energy from here
brainly.com/question/12319302
#SPJ5
Can some please help me ? Thank you!
Answer:
Hey ! I think I can help with this question.
In the diagram you were given the speed which is 5.25m/s and you were also given distance which is 950metres.
So the formula which will be suitable in my own way will be speed=distance/time....Since you weren't given the time,then you can place the numbers in their respectively places which will be 5.25=950/time....Then you will cross multiply which will be 5.25t=950....Then 950÷5.25=180.952381 which is approximately 181. then don't forget to add your unit, time is measured in seconds so the answer is going to be 181seconds.This is what I know...I hope this helps you.....Thank you for the question
How do protons, neutrons, and electrons determine the properties of an atom?
Answer:
Look below
Explanation:
The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.
Answer:
Look above
Explanation:
The number of electrons, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element. Electrons have a negative charge. Since the atom electrically neutral, the number of electrons must be equal to the number of protons. The electrons arrange themselves in energy levels around the nucleus.
While John is traveling along a straight inter-
state highway, he notices that the mile marker
reads 257 km. John travels until he reaches
the 145 km marker and then retraces his path
to the 175 km marker.
What is John's resultant displacement from
the 257 km marker?
Answer in units of km.
Answer:
Explanation:
The first displacement when the mile reading changes from 257 to 145
= 257 - 145
= 112 km
Then he turns back . This time the displacement will be negative .
The mile reading changes from 145 to 175
displacement = - ( 175 - 145 )
= - 30 km
Final displacement = 112 - 30
= 82 km .
Through which substance will sound travel the fastest? A)Copper wires B)Sea water C)Hot air D)Cold air
Answer:
A. Copper wires
Explanation:
the the answer is copper wires because sound waves travel the slowest through gases, faster through liquids, and fastest through solids and copper wire is a solid.
in the lab you will use a cart and track to explore various aspects of motion you will measure and record the time it takes the cart to travel certain distances and then complete some calculations
Answer:
Hii! ^^
Explanation:
It is given that by using track and cart we can record the time and the distance travelled and also the speed of the cart can be recorded. With all this data we can solve questions on the laws of motion.
Like using the first law of motion we can determine the force of gravity acting on the cart that has moved a certain distance and the velocity or the speed of card has already been registered and since time is known putting the values in formula would help us calculate the gravitational pull acting on cart.
Happy To Help! ^^
Rose’s checking account has a balance of Negative 54 dollars. She makes no more withdrawals but deposits $15 per day in her account over the next five days. On the sixth day, she makes no deposits, but the bank charges a maintenance fee of $5. What is the balance in her account on the sixth day?
Answer: $16
Explanation: The equation is:
x = -54 + (5 x 15) -5
x = -54 + 75 - 5 [remember to use PEMDAS!]
x= 21 - 5
x = 16 dollars
The answer is: $16
Proof⬇⬇
A football coach walks 24 meters eastward, then 12 meters westward, then 36 meters eastward, and finally 22 meters westward. What is the magnitude and direction of the displacement?
Answer:
Magnitude = 26 m
Direction = eastward
Explanation:
Given that a football coach walks 24 meters eastward, then 12 meters westward, then 36 meters eastward, and finally 22 meters westward. What is the magnitude and direction of the displacement?
Let eastward be positive and westward be negative.
Magnitude = 24 - 12 + 36 - 22
Magnitude = 60 - 34
Magnitude = 26
Since the answer is positive, the direction will be eastward.
Therefore,
Magnitude = 26 m
Direction = eastward
how can energy and matter connected?
Answer:
Energy is a property that matter has. The same amount matter can have different amounts of energy and so represent different states of matter. For example, if you add energy to an ice cube made of water, it becomes liquid water, and if you add even more energy, it becomes steam.
Explanation: Look At Answer
HURRY!
Which are characteristics of a ray when it hits a boundary and reflects, but not when it hits the boundary and refracts? Check all that apply.
changes direction
changes speed
does not change direction
does not change speed
bounces off the boundary
passes through the boundary
Answer:
changes direction
changes speed
bounces off the boundary
Answer:
B. changes speed
F. passes through the boundary
Explanation:
(This Answer is correct on Edge 2021)
A. "changes direction" is INCORRECT bc while the incident ray does change direction in refraction, it also changes direction in reflection, and we require only the characteristics that are present in refraction and not reflection.
Consider three force vectors F~ 1 with magnitude 43 N and direction 38◦ , F~ 2 with magnitude 26 N and direction −140◦ , and F~ 3 with magnitude 27 N and direction 110◦ . All direction angles θ are measured from the positive x axis: counter-clockwise for θ > 0 and clockwise for θ < 0. What is the magnitude F of the net force vector F~ = F~ 1 + F~ 2 + F~ 3? Answer in units of N.
Answer:
34.70 N
Explanation:
Given :
F~ 1 = 43 N in direction 38◦
F~ 2 = 26 N in direction −140◦
F~ 3 = 27 N in direction 110◦
Therefore,
F~x = 43 cos (38) + 26 cos (-140) + 27 cos (110)
= 43 (0.7) + 26 (-0.7) + 27 (-0.3)
= 3.8
F~y = 43 sin (38) + 26 sin (-140) + 27 sin (110)
= 43 (0.6) + 26 (-0.6) + 27 (0.9)
= 34.5
so, F~ = [tex]$ \sqrt{3.8^2 + 34.5^2}$[/tex]
= 34.70 N
what is a conversion factor?
Answer:
It is often necessary to convert from one unit to another. For example, if you are reading a European cookbook, some quantities may be expressed in units of liters and you need to convert them to cups. Or perhaps you are reading walking directions from one location to another and you are interested in how many miles you will be walking. In this case, you may need to convert units of feet or meters to miles.
Explanation:
Because of research
456.7 in scientific notation
456.7 = 4.567 x 10² in scientific notation
How balance of oxygen and carbon dioxide in the atmosphere is maintained?
Answer: The balance of oxygen and carbondioxide is made due to respreration and photosinthesis. As we leave carbon dioxide and take in oxygen the ballance of carbon dioxide and oxygen is made. And during the photosinthesis of plants the balance of carbon dioxide and oxygen is made.
What is the name(s) of your instructor(s)?
Answer:
they name if my instructor is mrs. Rodriguez