Answer:
the decrease in energy is due to a transformational in internal energy of the body in the rebound.
Explanation:
For this exercise we can calculate the initial and final mechanical energy
Em₀ = U = m g y₁
[tex]Em_{f}[/tex] = U = m g y₂
we look for the variation of the energy
ΔEm = Em_{f} - Em₀
ΔEm = m g (y_{f} -y₀)
ΔEm = m g (0.86 -1.2)
ΔEm = -3.332 m
We can see that there is a decrease in mechanical energy, this is transformed into internal energy of the ball during the impact with the ground, this energy can be formed by several factors such as a part of the friction with the surface, an increase in body temperature or a deformation of the body; there may be a contribution from several of these factors.
In conclusion the decrease in energy is due to a transformational in internal energy of the body in the rebound.
Answer:
Please find the answer in the explanation
Explanation:
Given that a student lefts a bouncy ball to 1.2m, then releases the ball. The ball bounces back up to 0.86m. To Construct an explanation as to what happened to the energy, let first consider the difference in the two height of the ball.
The initial height = 1.2 metres
Final height = 0.86 metres
There is a loss in elastic potential energy of the ball. And the loss energy is due to the difference in the height of the ball under the gravity.
The loss in elastic potential energy is being converted to the gravitational potential energy.
what is torque...........m
Answer:
Torque is the rotational equivalent of linear force. Torque is the engine's rotational force.
Hope this helps..
Explanation:
A microwave has a _________ wavelength and a ________ frequency than a radio wave
Answer:
A microwave has a shorter wavelength and a higher frequency than a radio wave.
Explanation:
On the electromagnetic spectrum, radio waves have the absolute lowest frequency, as well as the longest wavelength; therefore, any wave on the electromagnetic spectrum would have a shorter wavelength and higher frequency than a radio wave.
What kind of things would Physics be able to answer? I. How does a hair dryer work? II. How does a lightning bolt form? III. How far will a cannon ball fly through the air? IV. What happens to a person after they die? I and III I, II, and III I only I, II, IV
Answer:
physics answers everything to understand biology you need to understand chemistry which is connected to physics which is connected to mechanics like fluid mechanics or quantum mechanics which is connected to math and all of that is science not particularly physics but physics can answer all of the questions you asked and more.
Explanation:
Answer:
sorry im only in fifth grade
Explanation:
A toy car is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.5 m/s2. What is the final velocity after 5.0 s?
a 21.6 m/s
b 19.2 m/s
c 17.5 m/s
d 24.5 m/s
Explanation:
v = u + at
v = 5 + 2.5 * 5
V ( final velocity after 5 sec) = 17.5 m/s
what is the difference between a physical quantity and a unit
Answer: What is the difference of physical quanity and a unit?
Explanation: If you are working science or math problems, the answer to this question is that quantity is the amount or numerical value, while the unit is the measurement. For example, if a sample contains 453 grams, the quantity is 453 while the unit is grams.
A baseball player throws a baseball at 42 m/s. If the other player catching the baseball is 18 m from the player, how much time does it take the baseball to reach him?
Divide the distance by the speed:
(18 m) / (42 m/s) = 3/7 s ≈ 0.43 s
what type if data do you call it when a scientists mesure the length of the growing root tip and determine the rate a particular reaction
PLEASE HELP ASAP!!!!
T1 = 2×W / squrt (3) +1
T2 = squrt(6) ×W/ squrt (3) +1
Here, T1 is along A.
T2 is along B
W = 250N.
Yo can directly use above formula to find solution.
Explain why there is a delay between the arrival of the sound transmitted through the steel pipe and the sound transmitted by the air in the pipe.
Answer: RATE ME AND MAKE ME BRAININESS AND THANK ME
Explanation:Sound waves are pressure waves that travel through Earth's crust, water bodies, and atmosphere. Natural sound frequencies specify the frequency attributes of sound waves that will efficiently induce vibration in a body (e.g., the tympanic membrane of the ear) or that naturally result from the vibration of that body.
Sound waves can potentiate or cancel in accord with the principle of superposition and whether they are in phase or out of phase with each other. Waves of all forms can undergo constructive or destructive interference. Sound waves also exhibit Doppler shifts—an apparent change in frequency due to relative motion between the source of sound emission and the receiving point. When sound waves move toward an observer the Doppler effect shifts observed frequencies higher. When sound waves move away from an observer the Doppler effect shifted observed frequencies lower. The Doppler effect is commonly and easily observed in the passage of planes, trains, and automobiles.
The speed of propagation of a sound wave is dependent upon the density of the medium of transmission. Weather conditions (e.g., temperature , pressure, humidity , etc.) and certain geophysical and topographical features (e.g., mountains or hills) can obstruct sound transmission. The alteration of sound waves by commonly encountered meteorological conditions is generally negligible except when the sound waves propagate over long distances or emanate from a high frequency source. In the extreme cases, atmospheric conditions can bend or alter sound wave transmission.
The speed of sound in steel is about 17 times as fast as it's speed in air.
Naturally, when a sound starts out at one end of a pipe, it reaches the other end thru the steel before it reaches the other end thru the air in the pipe.
The longer the pipe is, the longer will be the delay between the arrival of the two sounds at the other end.
is -9/6 irrational, rational, and integer, a whole, number or natural?
Answer:
-9/6 is only rational.
Explanation:
-9/6 = -1.5
not an integer bc decimal
not irrational because it can be represented as a fraction
not a whole or natural number because its negative.
The dimensions of a room are 16.40 m long, 4.5 m wide and 3.26 m high. What is the volume of the room in cubic meters? Express your answer in scientific notation.
Answer:
the volume of the room is 240.588 meters3
The picture shows the scientific notation
- The school zone in front of your school has a posted speed limit of 25 mi/h, which is about 11 m/s. Let's
examine the stopping of a car in several different situations.
a. The crossing guard holds up her stop sign, and the driver is paying attention well. The car moves at a
constant velocity of 11 m/s for 2.3 seconds while the driver reacts, then slows down at a constant rate
of -4.5 m/s2. What is the stopping distance for the car in this situation?
Answer:
s = 38.7 m
Explanation:
First we calculate the distance covered during uniform motion of reaction time.
s₁ = vt
where,
s₁ = distance covered during uniform motion = ?
v = uniform speed = 11 m/s
t = time = 2.3 s
Therefore,
s₁ = (11 m/s)(2.3 s)
s₁ = 25.3 m
Now, we calculate the distance covered during decelerated motion:
2as₂ = Vf² - Vi²
where,
a = deceleration = -4.5 m/s²
s₂ = distance covered during decelerated motion = ?
Vf = Final Velocity = 0 m/s
Vi = Initial Velocity = 11 m/s
Therefore,
2(-4.5 m/s²)s₂ = (0 m/s)² - (11 m/s)²
s₂ = (-121 m²/s²)/(-9 m/s²)
s₂ = 13.4 m
the total distance will be:
s = s₁ + s₂
s = 25.3 m + 13.4 m
s = 38.7 m
what are forces that two objects apply on each other
describe how changing the particles changed the atom
Answer: During chemical changes particles do change with atoms or ions regrouping . Bonds (links) between atoms break and new ones form and energy is either given out or taken in.
Explanation:
Chemical reactions make particles to change and resulting to change atoms or ions via regrouping .
What is chemical reaction?The chemical reaction is the reaction between two reactants that led to the formation of products.
The products are substances that forms after reaction. The reactants are the substances which are original materials.
Bonds between atoms break and make new ones. In this process, energy is either rejected or taken in.
The particle are the electrons which are shared between the atoms of same or different elements.
The electrons in the valence get donated or accepted by the atoms and form bond. When the electrons are donated, the bonds break and when electrons are accepted, bonds are formed. So, the new element or compound is formed.
Thus, the chemical reaction are responsible for change in atoms due to change in particles.
Learn more about chemical reaction.
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what does the "LINE OF BEST FIT" mean?
Answer:
Line of best fit refers to a line through a scatter plot of data points that best expresses the relationship between those points.
Explanation:
What can you say about the motion of an object if its velocity time graph is a straight line parallel to the time axis
Explanation:
it means its velocity and acceleration is constant. And there is no change in displacement , so the object is not moving.
Is kilometer less than, greater than, or equal to dekameter
Answer:
Less than
Explanation:
Because a dekameter has a higher vantage point than kilometer as a kilometer has a lower vantage point
Answer: a dekameter is actually 10 yrds while 1 kilometer is actually 4 to 5 miles
Explanation:
Two magnets are placed near each other on a space station orbiting Earth.
Their north poles are facing each other. Which statement explains what will
happen to the magnets?
O A. They will be repelled because they are in each other's magnetic
field.
B. They will not move because they have only half of a magnetic
field.
C. They will not move because they have very small gravitational
fields.
D. They will be attracted because their electric fields will add
together
Answer: A. They will be repelled because they are in each other's magnetic
field.
Explanation: Apex and gravity and electrical don't have effect on magnets magnetic field.
The statement that described the happening to the magnets should be that they will be attracted because they are in each other's magnetic.
What is a magnet?Magnet refers to the piece of iron or other material that comprise of the atoms also it inbuilt the magnetism properties like attraction of other type of iron objects. In the case when the two magnets shoud be placed near to each other also their north poles should be faced each other so it should be attracted since it is considered as the each other magnetic.
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The periodic table includes
_____ periods.
There are currently seven complete periods in the periodic table
Answer:
The periodic table includes
Seven periods and Eighteen groups
What is the average speed of a motorcycle that goes 90 meters in 5 seconds?
Answer:18 m/s
Explanation:
Take=speed=distance /time
in which state of matter are particles spread farthest apart from another?
Gas particles are farthest apart from eachother.
Solid particles are tightly packed.
Liquid particles are somewhat loose.
Gas particles are rapidly moving and are farthest apart.
:D
Gas particles are spread farther apart from each other.
What is gas and its characteristics?Gas is a state of matter that has no fixed shape and no fixed volume.
Gases have a lower density than other states of matter, such as solids and liquids.
There is a great deal of empty space between particles, which have a lot of kinetic energy and aren't particularly attracted to one another.
The main characteristics of matter are:
(1) they are easy to compress,
(2) they expand to fill their containers, and
(3) they occupy far more space than the liquids or solids from which they form.
In a gas, particles are in continual straight-line motion.
The kinetic energy of the molecule is greater than the attractive force between them, thus, they are much farther apart and move freely of each other.
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An object is released from rest near a planet's surface. A graph of the acceleration as a
function of time for the object is shown for the 4s after the object is released. The
positive direction is considered to be upward. What is the displacement of the object after 2s?
Answer:
The displacement and direction of the body after 2 seconds is 10 meters downwards
Explanation:
The given information are;
From the graph, the acceleration, is seen as the horizontal line that starts from the y-coordinate, y = -5 m/s²
Therefore;
The acceleration of the body after it was released from rest = -5 m/s² with an upward direction;
Which gives, the acceleration of the body downwards = Opposite sign to the acceleration of the body upwards = 5 m/s²
The displacement, s, of the body after 2 seconds is given by the following equation of motion;
s = u·t + 1/2·a·t²
Where;
u = The initial velocity of the body = 0 m/s
t = The time duration of the displacement = 2 s
a = The acceleration of the body = 5 m/s², downwards
Therefore, by substituting the values, we have;
s = 0 × 2 + 1/2 × 5 × 2² = 10 meters
s = 10 meters
The displacement of the body after 2 seconds = 10 meters
Given that the direction of the displacement and the direction of the acceleration are the same, we have;
The displacement and direction of the body after 2 seconds = 10 meters downwards.
The displacement of the object moving downwards is 10 m.
The given parameters;
time of motion of the object, t = 2 sacceleration of the object constant = -5 m/s²The displacement of the object moving downwards (negative direction) is calculated using the second kinematic equation as shown below;
s = ut - ¹/₂at²
s = 0 - 0.5 x (-5) x (2)²
s = 10 m
Thus, the displacement of the object moving downwards is 10 m.
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The acceleration due to gravity on the Moon is gM. Suppose an astronaut on the Moon drops an object from a height of H. The time it would take the object to reach the Moon’s surface would be TM. The same object is dropped from the same height on Earth, where the acceleration due to gravity is gE. The time it takes the object to reach the Earth’s surface is TE. Which of the following is a correct mathematical relationship for the two times?
TE=gEgM−−−√TM
TE=gEgMTM
A
TE=gMgE−−−√TM
TE=gMgETM
B
TE=gEgMTM
TE=gEgMTM
C
TE=gMgETM
TE=gMgETM
D
TE=TM
The relationship between the two times is [tex]TE = TM\sqrt{\frac{gM}{gE} }[/tex]
The given parameters:
the acceleration due to gravity on the Moon = gM
height from which the object was dropped on moon, = H
time taken for the object to reach the moon surface, = TM
height from which the object was dropped on Earth, = H
the acceleration due to gravity on the Earth = gE
time taken for the object to reach the Earth's surface = TE
To find:
The relationship between the two times:Apply the following kinematic equation:
[tex]H = ut + \frac{1}{2} gt^2\\\\we \ know \ nothing \ about \ the \ initial \ velocity \ u , let \ u = 0\\\\H = \frac{1}{2} gt^2\\\\[/tex]
Height equation for the object on the moon:
[tex]H = \frac{(gM) TM^2}{2}[/tex]
Height equation for the object on the Earth:
[tex]H = \frac{(gE) TE^2}{2}[/tex]
Since the two heights are equal, set the two equation to be equal to each other to determine the relationship between the two times:
[tex]\frac{(gE)TE^2}{2} = \frac{(gM)TM^2}{2} \\\\(gE)TE^2 = (gM)TM^2\\\\make \ TE \ the \ subject \ of \ the \ formula;\\\\ TE^2 = \frac{(gM)TM^2}{gE} \\\\TE= \sqrt{\frac{(gM)TM^2}{gE} } \\\\TE = TM\sqrt{\frac{gM}{gE} }[/tex]
Thus, the relationship between the two times is [tex]TE = TM\sqrt{\frac{gM}{gE} }[/tex]
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give reason the si syetem of units is better than the mks system
is there a tutor available
hey can anyone help me out in dis pls
Answer: 1. Liquid, molecules aren't packed very closely, and take the shape of the bottom of the container 2. Gas molecules are far apart and fill the container completely
Explanation:
A cricket batsman hits a ball at a speed of 27m/s at an angle of 60 degrees to the horizontal. How far away would you have to stand in order to catch it (assuming you want to catch it just before it hits the ground)?
Answer:
64.4 m
Explanation:
First, find how long it takes to land. Given in the y direction:
Δy = 0 m
v₀ = 27 m/s sin 60° ≈ 23.4 m/s
a = -9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
0 m = (23.4 m/s) t + ½ (-9.8 m/s²) t²
t = 4.77 s
Next, find how far it travels in that time. Given in the x direction:
v₀ = 27 m/s cos 60° = 13.5 m/s
a = 0 m/s²
t = 4.77 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (13.5 m/s) (4.77 s) + ½ (0 m/s²) (4.77 s)²
Δx = 64.4 m
The idea that people behave in odd ways on a full moon is an example of a limitation of science. a characteristic of science. pseudoscience. scientific knowledge.
Answer:
Pseudoscience
Explanation:
Because its is based on beliefs with a explanation
Answer:
The answer to your question is B.pseudoscience
Explanation:
Pseudoscience means a collection of beliefs or practices mistakenly regarded as being based on scientific method.
I also did the test and got a 100 % on it.
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If size of an image is 10 cm and the magnification produced by a mirror is +1, what will be the size of object?
Answer:
h = 10 cm
Explanation:
The magnification produced by a mirror is given by :
[tex]m=\dfrac{h'}{h}[/tex]
h' is the image size and h is the object size
We have, h = 10 cm, m = +1
So,
[tex]m=\dfrac{h'}{h}\\\\h=\dfrac{10}{1}\\\\h=10\ cm[/tex]
So, the size off the object is same as that of the size of the image i.e. 10 cm.
To work on muscular endurance, you should use?
Answer:
Arm Workouts- with Weights.
Pushups for Upper-Body Strength.
Lunges and Squats.
Explanation: Lifting weights is one way to build muscular strength and endurance in your arms.
Pushups primarily work the pectoral muscles of the chest, starting directly below the neckline.
Brainlist please? and your welcome!
differences between a pair of scissors and nailcutter
Answer:
Different classes of levers
Explanation:
The main difference between a pair of scissors and nailcutters is that they are different classes of levers. Scissors are made from two class 1 levers, meaning that the effort is exerted at one end and the load at the other with the fulcrum in the middle. This is because we press one end together (the handles) so we are applying the effort, and the other side closes from the fulcrum in the middle.
Nailcutters on the other hand, consist of two class 2 levers. This means that the fulcrum is on the opposite end to the effort with the load in the middle. This is because we press down on one side and the two parts move closer together.
Hope this helped!