Explanation:
elastic potential energy, chemical potential energy, and gravitational potential energy are all forms of mechanical energy.
Mechanical energy includes elastic potential energy, chemical potential energy, and gravitational potential energy.
What is Mechanical energy?Mechanical energy is the energy that an object has as a result of its motion or position. Because it is stretched out in that position, a pulled bow has mechanical energy (elastic potential energy). Chemical potential energy is the energy that a substance has stored in its chemical bonds. A barbell hoisted high above a weightlifter's head has mechanical energy because of its vertical position above the ground (gravitational potential energy).The sum of kinetic and potential energy in an object used to perform a specific task is known as mechanical energy. In other words, it describes the energy of an object as a result of its motion, position, or both.
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5 A swimming pool is 50m long. A
swimmer covers it in 50s. Calculate
the average speed of the swimmer.
the answer is 150 000 s2
The average speed of the swimmer is equal to 1 m/s.
What is the average speed?The average speed can be defined as the total distance traveled by the object in a specific time interval. The average speed can be defined as a scalar quantity as it possesses only the magnitude and does not have any direction.
The average speed can be determined from the ratio of the total distance the object covers to the time taken to travel that distance.
The equation for average speed can be written as follows:
Average speed = Total distance/Total time taken
Given, the distance covered by the swimmer = 50 m
The total time taken by the swimmer = 50 sec
The average speed of the train = 50/50 = 1 m/s
Therefore, the average speed of the swimmer is equal to 1 m/s.
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What does it mean when work is positive?
You throw a ball straight down off the roof of a 47 m tall building with an initial velocity of -8m/s.
When does the ball hit the ground?
Answer:
t = 2.38 [s]
Explanation:
To solve this problem we must use the following equation of kinematics. We must clarify that both the acceleration and the initial velocity were taken as positive, since the velocity of the movement coincides with the direction of the acceleration.
[tex]x =x_{o} +v_{o} *t+(\frac{1}{2} )*a*t^{2}[/tex]
where:
x - Xo = distance = 47 [m]
Vo = initial velocity = 8 [m/s]
a = gravity acceleration = 9.81 [m/s²]
t = time [s]
Now replacing these values in the equation:
47 = 8*t + 0.5*9.81*t²
47 = 8t + 4.905t²
47 = 4.905*t(1.63 + t)
9.58 = t*(1.63 + t) solving this equation (cuadratic)
we found that t = 2.38 [s]
Why does a bowling ball and a feather hit the ground at the same time when they are dropped in a vacuum?
Answer:
See the explanation below.
Explanation:
This is because the vacuum chamber removes all the air contained and for this reason, there is no force that opposes the movement of the feather when falling. We must remember that the free fall equation of kinematics is not a function of the mass of an object.
[tex]v_{f} =v_{o} +g*t[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity [m/s]
g = gravity acceleration [m/s²]
t = time [s]
As we can see the mass of the object is not included in the equation.
A hilly road is spiral in shape.
How does the plant lichen quicken the weathering process?
A helicopter is dropping a package of rescue supplies to a group of stranded hikers. If it drops the supplies while it is hovering 172m above the hikers, how long does it take to hit the ground?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of the average velocity at which the supplies are travelling in air. The formula to be used here if the completed question is obtained is
Average velocity (in m/s) = distance (m) ÷ time (s)
Since we are looking for the time, then time should be made the subject of the formula
time (in secs) = distance ÷ average velocity
Hi.
1. Define Position
2. Explain Distance
3. Differentiate between distance and position.
Note : All these questions are under Physics.
Answer:
1-Simple harmonic motion, in physics, repetitive movement back and forth through an equilibrium, or central, position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side. The time interval of each complete vibration is the same
2-Distance is a numerical measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). The distance from a point A to a point B is sometimes denoted as
3-Position is the location of the object (whether it's a person, a ball, or a particle) at a given moment in time. Displacement is the difference in the object's position from one time to another. Distance is the total amount the object has traveled in a certain period of time.
Explanation:
hope it help
How long will it take a plane to fly 1256km
if it travels 500km/hr?
Answer:
The answer is 2.51 sExplanation:
The time taken can be found by using the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{1256}{500} \\ = 2.512[/tex]
We have the final answer as
2.51 sHope this helps you
When sand absorbs the electromagnetic waves of the Sun, it becomes warm through the process of______.
radiation
conduction
convection
evaporation
radiation
i know because i know
Importance of a cell
Explanation:
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.
. True/False mass is a fundamental Quantity
2. True/False the unit of density is g/cm3
3. True/False to convert from mm to cm, one must multiply by 10
4. True/False a micrometre screw gauge can measure the lengths greater than 3 cm
5. True/False the Vernier calliper can be used to measure small depths
6. True/False the mass of the bob affects the period of oscillation of a pendulum
7. True/False systematic error can be corrected by repeating the experiment
8. True/False a graph that rises from left to right would have a positive gradient
9. True/False gradient can be calculated using the formula rise over run
10. True/False acceleration is defined as the rate of change of displacemen
Answer:
truefalsefalsetruesorrtrue I really sorry I can't give answer because I don't know answerif a large bust and small cardboard going the same speed which vehicle has more kinetic energy
Answer:
bust
Explanation:
At the same speed, kinetic energy is proportional to mass. The more massive object (the large bust) will have more kinetic energy.
Answer:
Bust
Explanation:
the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.
Hope it is helpful....What is the speed in meters per second of a car that is travelling at 82km/h?
Answer:
22.777777777777 m/s
Explanation:
Since 1 kilometer is 1000 meters, then 82 km is 82000 meters. Since one hour is the same as 3600 seconds, then the answer is pretty simple: 82000/3600 or 820/36. That gets you 22.77777 or 22.78. Hope this helps
Choose:-
The opposite table shows the relation between
the resultant force of two forces and
the angle between them then the values of the
two forces are
a) 4N,3N
b) 6N,5N
c)3N,2N
d)2N,1N
CAN ANYONE ANSWER ME PLZZ?? QUICKLY !
My mommy wants to talk to you
list two animals that migrate to the clearing
A light bulb is filled with a gas at a
température of 293 K. If the initial pressure
of the gas is P. what will the pressure be
when the temperature increases to 360 K?
A 200 g blob of clay moves with a speed of 10 m/s towards a 300 g cart that is initially at rest.
a. What is the momentum of the system before the blob of clay strikes the cart?
b. What must be the momentum of the system after they come together?
c. If the blob of clay sticks to the cart, with what speed will the clay and cart move after they come together?
Answer:
a. 2 kg*m/s
b. [tex]p_{T_{f}} = 0.5v_{f} = 2 kg*m/s[/tex]
c. 4 m/s
Explanation:
a. The momentum of the system ([tex]p_{Ti}[/tex]) before the blob of clay strikes the cart is:
[tex] p_{Ti} = p_{b} + p_{c} [/tex]
Where:
[tex]p_{b}[/tex] is the momentum of the blob clay
[tex]p_{c}[/tex] is the momentum of the car
[tex] p_{Ti} = m_{b}v_{b} + m_{c}v_{c} [/tex]
Since the car is initially at rest, [tex]v_{c}[/tex] = 0
[tex] p_{Ti} = 200 g*\frac{1 kg}{1000 g}*10 m/s + 0 = 2 kg*m/s [/tex]
b. The momentum of the system after they come together:
[tex]p_{T_{f}} = m_{b}v_{b} + m_{c}v_{c}[/tex]
Since they come together, [tex]v_{b}[/tex] =
[tex]p_{T_{f}} = v_{f}(m_{b} + m_{c}) = v_{f}(0.2 kg + 0.3 kg) = 0.5v_{f}[/tex] (1)
Because we do not have the final speed we can not calculate the final momentum.
c. We can find the speed of the clay and car by conservation of the momentum:
[tex] p_{i} = p_{f} [/tex]
The initial momentum of the system was founded in part "a" (p = 2 kg*m/s), so we have:
[tex] 2 kg*m/s = m_{b}v_{b_{f}} + m_{c}v_{c_{f}} [/tex]
Again, when they come together, the final speed is the same:
[tex] 2 kg*m/s = v_{f}(m_{b} + m_{c}) [/tex]
[tex] v_{f} = \frac{2 kg*m/s}{0.2 kg + 0.3 kg} = 4 m/s [/tex]
Now, since we found the final speed we can calculate the momentum of the system after they come together (equation 1):
[tex] p_{T} = 0.5v_{f} = 0.5 kg*4m/s = 2 kg*m/s [/tex]
I hope it helps you!
A cannonball is shot from the top of
a 47.8 m high hill at a speed of
53.7 m/s. At its highest point, it is
moving at 31.5 m/s.
How high is it then?
A cannonball is shot from the top of a 47.8 m high hill at a speed of 53.7 m/s. The height then is 61.81 m/s.
What are kinematic equations?The motion of an object with constant acceleration is described by a set of equations known as kinematic equations. Integrals, derivatives, and rates of change must all be understood in order to solve kinematics equations.
Velocity is the rate and direction of an object's movement, whereas speed is the time rate at which an object is moving along a path. In other words, velocity is a vector, whereas speed is a scalar value.
The kinematic equation is:
v² = u² + 2gs (a = g)
Where u is the initial velocity, a is the acceleration, and v is the velocity after the time period t.
(53.7)² + 2 x 9.8 x 47.8 m
Therefore, the height is 61.81 m/s.
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it’s 144.2 I have it in my notes from when I was in school!!!!
emotional symptoms that may occur in those with a schizophrenic Disorder generally include all of the following except ______ emotion.
A. Flat
B. Appropriate
C. No
D. Inappropriate
Answer:
B
Explanation:
edge 2020
The emotional symptoms that may occur in those with a Schizophrenic disorder generally include all of the following except appropriate emotion. Hence, option (B) is correct.
What is schizophrenic disorder?Schizophrenia is a persistent, severe mental illness that has an impact on a person's relationships with others as well as their thinking, acting, and emotional expression. Despite not being as prevalent as other severe mental illnesses, schizophrenia can be the most persistent and incapacitating.
Schizophrenia patients frequently struggle to function well in relationships, the workplace, and academic settings. They can appear to have lost their sense of reality, feel afraid and withdraw. This chronic illness cannot be cured, but it can be managed with the right care.
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Which statement explains why the compass needle points in the direction it
does?
O A. The south pole of a magnet is the same as Earth's magnetic south
pole.
B. The north pole of a magnet attracts Earth's magnetic north pole,
C. The north pole of one magnet attracts the south pole of another
magnet
D. The north pole of one magnet attracts the north pole of another
magnet
Answer:
C. The north pole of one magnet attracts the south pole of another magnet.
Explanation:
A P E X
The best explanation that compass needle points in the direction it
does is that the north pole of one magnet attracts the south pole of another magnet. Hence, option C is correct.
What is a magnet?Anything that creates a magnetic field is considered to be a magnet. The most noteworthy characteristic of a magnet—a force that drags on other magnetic elements like iron, steel, etc.—is caused by this invisible magnetic field, which also attracts or repulses other magnets.
A piece of equipment built from a substance that has been magnetized and produces a consistent magnetic field is called a permanent magnet. A typical illustration is a fridge magnet used to keep notes on the door of the refrigerator. The term "ferromagnetic" refers to substances that can be attracted and are also powerfully drawn to a magnet.
These comprise several naturally occurring minerals, some alloys including rare-earth metals, and the elements iron, nickel, and cobalt and their alloys.
It is the property of the magnet that opposite poles attract each other, while the same poles repel each other.
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please help lol
im on my sisters acc btw
Answer:
sitting leg curls= hamstring
shrugs=shoulders
machine curls=biceps
bench press= pectorals
An airplane is flying north. What is the direction of the air friction force acting or
the plane?
Answer: south
Explanation:
HELP!! WILL MARK BRAINLIEST!!!!!
Complete the following sentences. Energy is required to _______ bonds in a molecule and released when bonds are _______.
Answer:
Create
Broken
Explanation:
Bond formation or creation requires the use of energy. Energy is used during bond formation between chemical species. The energy is required for the reaction to occur.
When bonds are broken, energy is releasedBond breaking process is a procedure that releases energy. This energy makes them able to react.Explain why the focal point of a diverging lens is called a virtual focal point.
Can some smart person help me out here!!!!!!!
Answer:
B
Explanation:
when you put it on a smooth surface and they're both at the same level it'll determine which one is faster and which one has less Mass. hope this helps much love .
There are no smart people available at the moment, but I'll try and help you.
Do the SECOND choice on the list. Keep the forces of the push on both blocks exactly equal. The block that jumps out ahead has less mass. The block that lags behind has more mass.
A motor with a resistance of 320 is connected to a voltage source. Four amps of current flows
in the circuit. What is the voltage of the source?
I
Answer:
V = 1280 [V]
Explanation:
To solve this problem we must use ohm's law which tells us that the voltage is equal to the product of the resistance by the current.
Therefore we have:
V = I*R
where:
V = voltage [V] (Units of volts)
I = current = 4 [amp]
R = resistance = 320 [ohms]
V = 4*320
V = 1280 [V]
Elements are composed of atoms of at least two different types.
True
False
Answer:
true
Explanation:
have a great day........
What is temperature? Using the example of the pot of boiling water, describe how you think temperature is related to thermal energy.
Answer:
An example would be "The soup is boiling hot and has a temperature of 100 °C, whereas the water in the tub is just comfortably warm, with a temperature of about 38 °C. Although the water in the tub has a much lower temperature, it has greater thermal energy".
Explanation:
Thermal energy and temperature are closely related. Both reflect the kinetic energy of moving particles of matter. However, temperature is the average kinetic energy of particles of matter, whereas thermal energy is the total kinetic energy of particles of matter.
If the ratio between the frequency of a man's voice and that of a girl's voice is 3/4, what
is the ratio between the speeds of the voices of the man and the girl in air ?
Answer:
it is 34
34 is th answer
Explanation: