Answer:
displacement: 22.4 distance 30km
Explanation:
hope I helped
The required distance and displacement are both approximately 22.36 km.
What are Pythagorean triplets?In a right-angled triangle, its sides, such as the hypotenuse, are perpendicular and the base is Pythagorean triplets.
Here,
The distance John travels is the total length of his path, which can be found using the Pythagorean theorem since he forms a right-angled triangle:
Distance = √(20² + 10²) = √500 = 10√5 ≈ 22.36 km
To find the displacement, we need to draw a straight line from John's starting point to his ending point, which forms the hypotenuse of the right-angled triangle. The length of this line is the displacement.
The displacement is equal to the distance between John's starting point and his ending point, which can be found using the Pythagorean theorem as well:
Displacement = √20² + (10 km - 0 km)²
= √400 + 100 = √500
= 10√5 ≈ 22.36 km
So, the distance and displacement are both approximately 22.36 km.
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What is Required for the energy of an object to change
Based on the figure shown, about how far can sound travel in water in 2.5 s if the water temperature is 25°?
O a. 3,750 m
Oc. 600 m
Ob. 375 m
O d. 875 m
Answer:
A
Explanation:
What type of wave is created here?
A) longitudinal
B) transverse
Help me plssss!!!
Answer:
b
Explanation:
Answer:
this is a longitudinal wave!!!
Explanation:
because you can see the compressions and rarefactions.
A baseball player hits a baseball with a bat. The mass of the ball is 0.25 kg. The ball accelerates at 200 m/s2
What is the force, to the nearest N, of the bat on the baseball?
Answer:
50N
Explanation:
Force (N) = mass (kg) × acceleration (m/s²)
0.25kg times 200m/s² = 50N
The force, to the nearest N, of the bat on the baseball is 50 Newtons.
Given the data in the question;
Mass of ball; [tex]m = 0.25kg[/tex]Acceleration; [tex]a = 200m/s^2[/tex]Force; [tex]F = \ ?[/tex]
To determine the force, we use Newton's second law of motion:
[tex]F = m * a[/tex]
Where m is mass and a is acceleration
We substitute our values into the equation;
[tex]F = 0.25kg * 200m/s^2\\\\F = 50 kg.m/s^2\\\\F = 50N[/tex]
Therefore, the force, to the nearest N, of the bat on the baseball is 50 Newtons.
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1. A brick and a peanut are dropped of the roof of a house at the same time, which
object hits the ground first? (Ignore air resistance).
Answer:
It would be the brick since the mass and the weight is greater than the peanut I might be wrong on this but thats the best answer i can give
Explanation:
a girl is riding her bike and coasting down a hill. When she gets to the bottom of the hill, her bike continues to move without her pedaling. What type of energy is her bike using ?
a. potential
b. kinetic
c. solar
d. thermal
y’all, i have so many more questions
Answer:
Her bike is using kinetic energy
B
Explanation:
A golfer collected data on the distance a golf cart traveled in a straight line and plotted it on a graph
Which of these does NOT describe the cart’s motion on this graph?
The cart was at rest between 5 s and 7 s.
The cart moved toward the starting point between 7 s and 12 s.
The cart moved away from the starting point between 8 s and 10 s.
The cart moved away from the starting point between 2 s and 5 s.
Answer:
The cart moved away from the starting point between 8 s and 10 s.
Explanation:
Given that :
Which of these does NOT describe the cart’s motion on this graph?
The cart was at rest between 5 s and 7 s : From the distance of golf cart Vs time graph ; the car was at rest between 5s and 7s as the graph was flat with that time interval, meaning there was no change in distance.
The cart moved toward the starting point between 7 s and 12 s. : The graph depicts a negative slope at this time interval as the distance from starting point fell from about 26 m to 10 m
The cart moved away from the starting point between 8 s and 10 s. : At this time interval, the cart moved towards the starting not and not away. This could be seen in the decrease in Distance from starting point between the tune interval.
The cart moved away from the starting point between 2 s and 5 s. - - > The cart moved away from the starting point, with the positive slope signifying an increase in distance.
Therefore, The cart moved away from the starting point between 8 s and 10 s does not describe the motion of the cart on the graph.
Question 1(Multiple Choice Worth 2 points)
(04.06 LC)
Hydrogen is in column 1 of the periodic table. What information does this give us?
There is one other element that hydrogen will bond with.
There is one neutron in the nucleus.
The mass of the atom is one.
There is one electron in the outer energy level.
Answer:
D
Explanation:
the reason for each column is to show the electronic configuration of the elements in that column.
Hope This Helps ▼・ᴥ・▼
a train is sitting still at the top of 990-m mountain. it then coasts down the mountain and back up another mountain that is 520 m high. what is the train's speed at the top of the second hill?
Answer:
Explanation:
At the top of 520 m high mountain , the train will lose potential energy due to loss of height from 990 m to 520 m and gain kinetic energy .
Loss of height = 990 - 520 = 470 m
Loss of potential energy = m x g x 470 where m is mass of the train .
Gain of kinetic energy = 1/2 m v² where v is velocity of train at the top of 550 m high mountain .
1/2 m v² = m x g x 470
v² = 2 x 9.8 x 470
v = 95.98 m /s
In which of these can plasma be
found?
lightning
neon signs
microwave ovens
all of these
Answer:
The sun and other stars consist of plasma. Plasma is also found naturally in lightning and the northern and southern lights. Human-made plasma is found in fluorescent lights, plasma TV screens, and plasma spheres
Explanation:
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The acceleration due to gravity is 9.81 m/s2, towards the Earth. Rain falling from an altitude of 9,000 m would fall for about 1.5 minutes before hitting the ground (ignoring air resistance). What would be the final speed of a raindrop by the time it reaches the ground?
Answer:
the final speed of the rain is 541 m/s.
Explanation:
Given;
acceleration due to gravity, g = 9.81 m/s²
height of fall of the rain, h = 9,000 m
time of the rain fall, t = 1.5 minutes = 90 s
Determine the initial velocity of the rain, as follows;
[tex]h = ut + \frac{1}{2} gt^2\\\\9000 = 90u + \frac{1}{2} (9.8)(90)^2\\\\9000 = 90u + 39690\\\\90u = -30690\\\\u = \frac{-30690}{90} \\\\u = -341 \ m/s[/tex]
The final speed of the rain is calculated as;
[tex]v^2 = u^2 + 2gh\\\\v^2 = (-341)^2 + 2(9.8\times 9000)\\\\v^2 = 292681\\\\v = \sqrt{292681} \\\\v = 541 \ m/s[/tex]
Therefore, the final speed of the rain is 541 m/s.
Answer:
The magnitude of the final speed of a raindrop by the time it reaches the ground will be 541.45 m/s.
Explanation:
The final speed of the raindrop can be found using the following equation:
[tex] v_{f} = v_{0} - gt [/tex]
Where:
[tex]v_{f}[/tex]: is the final speed =?
[tex]v_{0}[/tex]: is the initial speed
g: is the acceleration due to gravity = 9.81 m/s²
t: is the time = 1.5 min
First, we need to find the initial speed:
[tex] y_{f} = y_{0} + v_{0}t - \frac{1}{2}gt^{2} [/tex]
Where:
[tex]y_{f}[/tex]: is the final height = 0
[tex]y_{0}[/tex]: is the initial height = 9000 m
Hence, the initial speed is:
[tex] v_{0} = \frac{y_{f} - y_{0} + \frac{1}{2}gt^{2}}{t} = \frac{0 - 9000 m + \frac{1}{2}9.81 m/s^{2}*(90 s)^{2}}{90 s} = 341.45 m/s [/tex]
Hence, the final speed is:
[tex] v_{f} = v_{0} - gt = 341.45 m/s - 9.81 m/s^{2}*90 s = -541.45 m/s [/tex]
Therefore, the magnitude of the final speed of a raindrop by the time it reaches the ground will be 541.45 m/s.
I hope it helps you!
how can Magnets cause objects to have kinetic energy?
SOMEONE PLZ HELP!!!! Lots of points
Answer:
If there is a system of magnets being held in place, there is potential energy. When you let go, the potential energy converts to kinetic energy and the magnets move. Putting the system of magnets close together which creates an opposing force.
Explanation:
Magnets cause objects to have kinetic energy by the magnetic force present in the magnet.
Magnets is a material which has a strong magnetic field which attracts ferromagnetic substances such as nickle, iron etc.
When a ferromagnetic objects put near the magnet, the magnet attracts the object and causes the movement towards its direction.
Therefore, magnets cause objects to have kinetic energy by the magnetic force present in the magnet.
To know more about magnets,
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What direction does energy transfer to the direction of a light wave
Answer:
light is a transverse wave. The direction of energy transfer is perpendicular to the motion of the wave
Explanation:
Light is an example of a wave that transfers energy through empty space. How are all mechanical waves similar? The waves caused by an earthquake are good examples of energy transfer. The disturbed ground shakes from side to side and up and down as the waves move through it,
Calculate the weight in Newtons of a person who has a mass of 69 kg.
Newton’s 2nd Law: F=ma. If you push a shopping cart with 130 N of force, and it accelerates at 3 m/s², what is the mass of the cart?
Answer:
43.3kg
Explanation:
Given parameters:
Force = 130N
Acceleration = 3m/s²
Unknown:
Mass of cart = ?
Solution:
From Newton's second law of motion:
F = m x a
F is the force on the body
m is the mass
a is the acceleration
So;
m = [tex]\frac{F}{a}[/tex] = [tex]\frac{130}{3}[/tex] = 43.3kg
Which is a unit of momentum?
A) N-m/s
B) kg-m/s
C) kg-m/s2
D) N-m/s2
please hurry i need help asap, will mark brainliest
Answer:
unit of momentum is kgm/s2
The unit for momentum can be Newton-second (Ns). In the CGS system, if the mass is in grams and the velocity in centimeters per second, then the unit of momentum will be gram-centimeters per second (g⋅cm/s).
What is momentum ?"Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion."
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A layer of water Δx m thick which lies x m above the bottom of the tank will be rectangular with length 8 m. Using similar triangles, we can see that it will have widt of_____m
Answer:
x
Explanation:
The question relates to the energy required to pump water out of the
spout at the top of the triangular prism tank.
The width of the layer of water Δx thick is x m.
Reasons:
The location of the layer Δx m thick = x meters above the bottom
The length of the triangular (cross-section) prism tank = 8 meters
The length of the layer Δx thick layer = 8 meters
From the attached drawing of the cross-section of the tank, we have;
The height of the triangular tank cross-section = 3 meters
The length of the base of the triangular cross-section = 3 meters
By similar triangles, we have;
[tex]\dfrac{Height \ of \ Tank}{Base \ length \ of \ tank}= \dfrac{Height \ of \ layer \ with \ thickness \ \Delta x }{Width \ of \ layer \ with \ thickness \ \Delta x}[/tex]
Which gives;
[tex]\dfrac{3}{3} =\dfrac{x}{Required \ width}[/tex]
[tex]\dfrac{3}{3} =1 = \dfrac{x}{Required \ width}[/tex]
Required width × 1 = x
The required width = x m
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HELPPPPPPP!!!!!
why are cations drawn towards cathode and anions towards anode?
Explanation:
Cations are positive and anions are negative, since opposite charged attract, the cations are drawn towards the cathode, which is the negatively charged electrode and anions are drawn towards the anode (positive electrode)
Answer:
because cations are negatively charged particles and their attracted towards a positive electrode that is anode while anions and positively charged particles and I attracted towards the negative electrode that is cathode
Explanation:
Why would a cell phone not make a sound in space?
Answer:
because there is no sound in space
What can be found in every skeletal muscle?
A. Nerves, bones, cartilage, and connective tissue
B. Tendons, cartilage, nerves, and blood vessels
C. Muscle fibers, nerves, connective tissue and blood vessels
D. Tendons, nerves, blood vessels and bones
Answer:
A.
Explanation:
When the
temperature of the air in a
hot air balloon increases,
what happens to the
volume of the gas?
Answer: What do you think happens to the volume of gas inside the balloon? As the temperature increases, the gas particles absorb more heat energy. They speed up and move farther away from one another. So the increase in temperature causes an increase in volume.
Explanation:
Answering the following questions will help you to focus on the outcomes of these experiments:
How does the length to height ratio (the IMA) of trial 1 compare to trial 2?
Why is the actual mechanical advantage less than the ideal mechanical advantage in each of the trials?
If a machine was 100% efficient, how would the AMA compare to the IMA?
Write a summary paragraph discussing this experiment and the results. Use the following questions and topics to help guide the content of your paragraph.
According to your data, was your hypothesis correct? (Be sure to refer to your data when answering this question.)
Summarize the conclusions that you can draw from this experiment. Use the questions above to guide your ideas.
Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems.
Give at least three examples from everyday life where an inclined plane is used to reduce the effort force needed to accomplish a task.
Answer:
Answering the following questions will help you to focus on the outcomes of these experiments:
1.How does the length to height ratio (the IMA) of trial 1 compare to trial 2?
= Trial 1 is 5.09, and Trial 2 is 3.25. Trial 1 is higher because the height of the trial is less than trial 2.
2.Why is the actual mechanical advantage less than the ideal mechanical advantage in each of the trials?
= It is because the machine's ideal mechanical advantage reflects the increase or decrease in force that would have occurred without friction. It is always greater than the actual mechanical advantage because all machines have to overcome friction.
3.If a machine was 100% efficient, how would the AMA compare to the IMA?
= In any real machine, some of the efforts are used to overcome friction. Thus, the resistance force ratio to the effort (AMA) is less than the (IMA).
A frictionless machine would have an efficiency of 100%.
Which has the greater volume?
A. wood
B. white block
C. equal
Answer:
B.white block
hope it's the answer ....❤❤❤❤❤❤
Wavelength in one full standing wave
Answer: one complete wave in a standing wave pattern consists of two loops. Thus, one loop is equivalent to one-half of a wavelength
Explanation: I hope that helped- Please mark me as brainliest!
Answer:
the standing wave within =1 oscillates at the fundamental frequency and has a wavelength that is twice the length of the string . Higher integer value of n correspond to mode of oscillation called harmonics or overtones . Any standing waves on the string will have n +1 node including the fixed end and n anti-nodes.
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guitar produces sound waves when a string is plucked and it vibrates. The measure of the number of the string's vibrations in 1 second is called
A. speed
B. frequency
C. amplitude
D. wavelength
Answer:
i think its B. frequency
Explanation:
please tell me if its wrong but it should be right
Suppose a worker is pushing a
wheelbarrow. He used a force of 625N to
perform 3500J of work on the wheelbarrow.
How far did he push it?
F 5.6 m
G
0.18 m
H
10.2 m
J
14.3 m
Answer:
5.6m
Explanation:
given
Applied force(F)=625N
workdone(w)=3500J
distance travelled by wheel barrow(s)=w/F
= 3500/625
= 5.6m
when talking about Acceleration ,what is significant about the about the sign(+ or -)?
Answer:
Acceleration at its most basic is the act of increasing your running speed. From a standing start (or blocks), you explode into action. If you’re already running, you pick up the pace. Acceleration continues until you can no longer increase your speed, at which point you achieve maximum velocity (top-end speed). Acceleration seems simple enough. The plus means your increasing speed, the k=minus means your decreasing in speed.
Explanation:
1. If a rock is dropped from a 600 meter cliff, how long will it take to hit the ground?
Dl
Answer:
11.1s
Explanation:
Given parameters:
Height of cliff = 600m
Unknown:
How long it takes to hit the ground = ?
Solution:
To solve this problem, we use one of the kinematics equation;
H = ut + [tex]\frac{1}{2}[/tex]gt²
H is the height
u is the initial velocity = 0m/s
t is the time taken
g is the acceleration due to gravity
600 = [tex]\frac{1}{2}[/tex] x 9.8 x t²
600 = 4.9t²
t² = 122.5
t = 11.1s
Use the Electrostatic Series to predict the charges on the following pairs of substances when they are rubbed together:
A glass coffee table and a cotton dusting cloth
A rubber balloon and human hair
A plastic comb and cat fur
An ebonite rod and a piece of silk
Which best explains how thermal energy is transferred when someone holds a hand above a fire?
a) It is transferred by conduction and radiation.
b) It is transferred by only convection.
c) It is transferred by only conduction.
d) It is transferred by radiation and convection.