Answer:
A. Forming a Hypothesis
Answer: C I think
Explanation:
Sketch a velocity vs. time graph of a car accelerating in the positive direction. What is the slope of a velocity vs. time graph equal to?
Answer:
Acceleration
Explanation:
Let me teach u a trick, most teachers loves to tell students to memorize what the slope means, and what does the area below the graph mean, and i think this is bs
So how u do it is this
Now it is a velocity vs time
Now to find the slope u would take
Velocity / time
Now what is the unit for velocity? m/s
What is the unit for time? s
Therefore since u know to find the slope u use
Velocity divide by time
So just take the unit of velocity divide the unit of time and see what unit u get
m/s ÷s
m/s x 1/s
= m/s^2
What unit is this?
This is the unit for acceleration
This trick works for every graph u see, and let me show u an extra bonus one
Now u are velocity vs time graph
Now if they ask u what does the area below graph means?
So u know area is just height x length, in other words y axis × x axis
So it means velocity x time
Therefore what would u get? Same trick
m/s x s
= m
What is m? m is meter, and this stands for displacement
Comparing descriptive and experimental research?
(d) What type of transformation is done by the following things?
(i) electrical lamp
(ii) electric fan
(iii) battery operated radio
(iv) kerosene lamp
(v) human body
(vi) car
Answer:
human body is answer according to our studies
A student walks to the right, 25-m along the C Hall in 15-s. They turn around and walk 15-m to the left in 8.0-s. What is the average speed and the average velocity? (V represents average speed and ΔV represents average velocity)
For the student that walks to the right 25 m in 15 s and then turns and walks to the left 15 m in 8.0 s, we have:
1. The average speed is 1.74 m.
2. The average velocity is 1.42 m.
1. The average speed is an scalar wich is given by:
[tex] V = \frac{d_{t}}{t_{t}} [/tex]
Where:
[tex]d_{t}[/tex]: is the total distance
[tex]t_{t}[/tex]: is the total time
The total distance and the total time can be calculated as follows:
[tex]d_{t} = d_{1} + d_{2} = 25 m + 15 m = 40 m [/tex]
[tex] t_{t} = t_{1} + t_{2} = 15 s + 8.0 s = 23 s [/tex]
Since V is a scalar, the direction of motion is not important to calculate the final value.
Then, the average speed is:
[tex] V = \frac{d_{t}}{t_{t}} =\frac{40 m}{23 s} = 1.74 m/s [/tex]
2. The average velocity is a vector, so the direction of motion is important here. This ΔV can be calculated with the following equation:
[tex] \Delta V = \frac{\Delta x}{\Delta t} = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} [/tex]
Where:
x: is the displacement
f: is for final and i: is for initial
Hence, the average velocity is:
[tex] \Delta V = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} = \frac{15 m - 25 m}{8.0 s - 15 s} = 1.42 m/s [/tex]
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Can a resultant forces' direction be north or south, or is it only East and West?
a high schooler who lives on the "5th" floor of an apartment complex dropped his phone off the balcony. If the balcony is 18.75 m above the ground, determine the time required for the phone to reach the ground'
Answer:
1.38 s
Explanation:
Use the free falling formula
T = √(L)/ g
T = √18.75/9.8
T = 1.38 s
why frequency remains unchanged during reflection
Answer:
Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.
Answer:
When waves travel from one medium to another the frequency never changes.
Explanation:
As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.
will mark brainliest!
Answer:
b=t-p(m-n)/s
Explanation:
I need help answering this question. Thanks!
Answer:
459.195 (N).
Explanation:
in order to calculate the required value of the Fₓ:
Fₓ=F*cos(37°); Fₓ=575*0.7986≈459.195 (N).
For more info see the attachment (note, the required force Fₓ is marked with red colour).
What is the value of G on earth and moon?
We have that The acceleration due to gravity on the Moon And
The acceleration due to gravity on the surface of the Earth is approximately
[tex]1.625 m/s^2[/tex]
[tex]9.81 m/s^2,[/tex]
From the Question we are asked
The value of G on earth and moon?
Where G refers to The acceleration due to gravity
Generally
The acceleration due to gravity on the Moon is approximately
[tex]1.625 m/s^2,[/tex]
And
The acceleration due to gravity on the surface of the Moon is approximately
[tex]9.81 m/s^2,[/tex]
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ruto is 12 years old.in three years time he will be ⅓ of his father present age.how old was his father 12 years ago
Answer: 33
Explanation:
12+3=15, so in 3 years time Ruto will be 15.
Because 15 is said to be 1/3 times his fathers present age (x), you can plug that into an equation.
15=1/3(x)
Then solve the equation.
(3)15=[1/3(x)]•3
45=x
His father is currently 45, so if you subtract 12 from that, you get 33.
Ruto’s father was 33 years old 12 years ago.
what is the nature of a machine having more power
can do a lot of work
can do a small work
can work fast
works slowly
choose from the option
the nature of a machine having more power can work fast
what is the charge on a complete atom equal to
Answer:
The charge of an atom is the number of protons minus the number of electrons.
Explanation:
WILL GIVE BRAINLIEST If a neutron’s relative mass is listed as 1, what would be the relative mass of a proton and an electron?
Help me with this quesiton
Why do we use sharp pointed needle while stiching cloths ? physic
Answer:
Explanation:
A blunt needle won't get the job done as it won't pass through the fabric well
Suzy drives 10 miles north then drives 24 miles west. What is her total distance traveled?
Answer:
34
Explanation:
calculate the frequency and time period of sound wave of 35 m wave length propagating at a speed of 3500m/s
Answer:
Frequency = 100 Hz
Time period = 0.01 sec
Explanation:
f= 3500/35 = 100
T = 1/f = .01
sebuah titik p berjarak 2m dari muatan sebesar 5×10⁷c. besar potensial titik p adalah
Answer:
Explanation:
V=k*q/r
V= (9*10⁹) * 5*10⁷/2
V = 9*10⁹ * 25*10⁶
V = 225*10¹⁵
3. ¿Cuál es la distancia focal de un espejo CONVERo sabiendo que un objeto colocado
a 4 cm de él da una imagen virtual situata a 2 cm del espeso? ¿Cuál es el radio de
curvatura del espejo? Determina también las características de la imagen sie
objeto mide 5 cm
i dont know for real
A vertical object placed on a bench is observed to have three shadows of different sharpness in different directions.explain this observation.
Answer:
three light sources at different directions, maybe of different sizes and intensity
what are 2 ways elastic energy affects us as humans
Answer:
The coil spring of a wind-up clock.
An archer's stretched bow.
Explanation:
write any five simple machines used in our daily life and classify them.
Answer:
hope this helps
Explanation:
Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever. While simple machines may magnify or reduce the forces that can be applied to them, they do not change the total amount of work needed to perform the overall task.
A dog runs 20 m east and then 35 m west in 12 seconds.
What is the dog speed? What is the dogs velocity?
Answer: Dog's speed = (20 + 35) /12 = 4.583 m/s
Dog's velocity = (20-35)/12 = -1.25 m/s
Explanation: Speed is a scalar quantity so we don't care about direction which means we add the magnitude of both the directions i.e. east and west.
About the velocity, it's a vector quantity. So, we must be very careful with the directions and signs. In cartesian coordinates system, we generally take the right side of origin as the positive x-axis and the left side of origin as the negative x-axis. So, considering the same fact, we consider east as positive side and west as the negative side.
Therefore, when we add 20m + (-35m), we get = -15m and you already have the time period of 12 s.
100 points 100 points! Answer correctly please I need a good grade!!!!! Brainiest for correct answer!
Answer:
2.2
Explanation:
It then pauses before flying with an average velocity of 6.8 m/s east for 3.5 s to another branch.
Answer:
9 m/s
Explanation:
The seagull flew at a constant velocity for a total of 32 seconds.
One-quarter of 32 is:
[tex]\implies \dfrac{1}{4} \times 32=\dfrac{32}{4}=8\; \sf seconds[/tex]
Therefore, if the seagull flew 72 meters in one-quarter of 32 seconds, it flew 72 meters in 8 seconds.
[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]
To find the velocity (speed) of the seagull, substitute the distance and time into the formula:
[tex]\implies \sf Velocity=\dfrac{72}{8}=9\; \sf m/s[/tex]
Which material would you expect to have greater resistance, plastic or silver? Explain your answer.
Answer:
plastic
Explanation:
because it is an insulator that it is a poor conductor of electricity.
There is no flow of electricity in the plastic, so the plastic has greater resistance.
What is resistance?A substance's ability to obstruct the flow of electrical current is referred to as resistance. It is symbolized by the capital letter R. The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.
A component's resistance is one ohm when a one-volt potential difference (voltage) is present. The current in a direct-current (DC) electrical circuit is inversely proportional to the resistance, while the supplied voltage is held constant. The current is cut in half when the resistance is doubled; when the resistance is cut in half, the current is increased by double.
Thus, plastic has greater resistance.
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A magnet has ___________ poles. Like poles__________each other and unlike poles __________. An electromagnet is used to separate large masses of___________ scrap. The strength of the magnetic is increased by inserting a _____________. In torch we use a ________ as the source of electricity. To light a table lamp and to run a refrigerator, We use ____________ as the source of electricity. A group or two or more cells is called a ___________ . _____________ pass electricity through them.
Answer:
2 repel attracts light water
Answer:
A magnet has two poles.
Like poles repel each other and unlike poles attract
An electromagnet is used to separate large masses of iron scrap.
The strength of the magnetic field of an electromagnet is increased by inserting a core of soft iron.
In a torch we use a dry cell as the source of electricity.
To light a table lamp and to run a refrigerator, we use mains as the source of electricity.
A group of two or more cells is called a battery.
Conductors pass electricity through them.
Hanging from a tree branch is doing work?
Explanation:
The branch is possessing gravitational potential energy.
On a velocity vs. time graph, what does it mean when the line crosses over the x-axis?
On a velocity - time graph, if the line crosses the x - axis it depicts that the object has started moving in the opposite direction.
A mouse runs 5 m north across the floor before hearing a cat. Then it runs back south along the same path for 1 mand turns west to run under a sofa 3 m away.
What is the displacement of the mouse and the total distance it ran?
a. The mouse's displacement is 5 m southwest and it ran 9 m.
b. The mouse's displacement is 5 m northwest and it ran 9m
c. The mouse's displacement is 9 m and it ran 5 m.
d. The mouse's displacement is om and it ran 9 m.
The displacement of the mouse is 5m and the total distance is 9m.
The given parameters;
initial displacement of the mouse = 5 m north
second displacement = 1 m South
third displacement = 3 m west
To find:
the displacement of the mouse and the total distance it ranDisplacement is the change in the final position and the initial position of an object.
Distance is the total path covered by the object.
When the mouse was at 1 m south, the displacement = 5 m - 1m = 4m
The displacement of the mouse between 4m south and 3m west is calculated by using Pythagoras theorem.
[tex](displacement)^2 = 3^2 + 4^2\\\\(displacement)^2 = 25\\\\displacement = \sqrt{25} \\\\displacement = 5 \ m[/tex]
The total distance of the mouse = 5 m + 1m + 3m = 9m
Thus, the displacement of the mouse is 5m and the total distance is 9m.
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