Answer:
W = P * t work = work/time * time
t = W / P time required
t = 2000 kg * 9.8 m/s2 * 28 m / P = 549,000 J / 13000 J/s
t = 42.2 sec
Note: 1 kW = 1000 J/sec
Time required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW of electric power will be 42.22 seconds .
What is Electric Power ?The time rate of doing work or delivering energy is called Electric Power
electric Power can be calculates by
electric Power = Work done / time
Given :
mass (m) = 2000 kg
height (h) = 28m
electric power (P) = 13 kW = 13 * 10^3
acceleration due to gravity (g) = 9.8 m/s^2
Since , the load has been taken to a certain height , hence work must be done and that work done is stored in the form of Potential Energy
Work done = m* g * h
= 2000 * 9.8 * 28
13000 = 2000 * 9.8 * 28 / time
Time = 2000 * 9.8 * 28 / 13000
Time = 42.22 seconds
Time required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW of electric power will be 42.22 seconds .
learn more about electric power
https://brainly.com/question/14745268?referrer=searchResults
#SPJ3
If a ride at Disneyworld goes from rest to 27 m/s in 2.8 seconds and the mass of the ride and riders together is 5000 kg (true data!), what is the average power required to do this?
Answer:
Approximately [tex]6.5 \times 10^{5}\; {\rm W}[/tex].
Explanation:
At a speed of [tex]v[/tex], the kinetic energy of the ride and the riders of mass [tex]m[/tex] (combined) would be:
[tex]\begin{aligned} \text{KE} &= \frac{1}{2}\, m\, v^{2}\end{aligned}[/tex].
If friction is negligible, [tex]\text{KE} = (1/2)\, m\, v^{2}[/tex] would be the work required to achieve this speed. That is:
[tex]\begin{aligned} \text{work} = \text{KE} = \frac{1}{2}\, m\, v^{2}\end{aligned}[/tex].
Given that this work was completed in a duration of [tex]t[/tex], the average power would be:
[tex]\begin{aligned} & (\text{average power})\\ =\; & \frac{(\text{work})}{(\text{time required})} \\ =\; & \frac{(1/2) \, m\, v^{2}}{t}\end{aligned}[/tex].
Substitute in [tex]m = 5000\; {\rm kg}[/tex], [tex]v = 27\; {\rm m\cdot s^{-1}}[/tex], and [tex]t = 2.8\; {\rm s}[/tex]:
[tex]\begin{aligned} & (\text{average power}) \\ =\; & \frac{(1/2) \, m\, v^{2}}{t} \\ =\; & \frac{(1/2) \times 5000\; {\rm kg} \times 27\; {\rm m\cdot s^{-1}}}{2.8\; {\rm s}} \\ \approx \; & 6.5 \times 10^{5}\; {\rm W}\end{aligned}[/tex].
(Note that if acceleration is constant, the power input to the ride would be proportional to [tex]t^{2}[/tex]. The average power of input to the ride would be a quarter of the peak power input. Multiplying average velocity (proportional to [tex]t[/tex]) by average force (proportional to [tex]t[/tex]) would overestimate the average power by [tex]100\%[/tex].)
Why must a resistor be removed from a circuit to measure its resistance with an ohmmeter.
so that only its resistance is measured.
how do you find work when only given the angle a sled is pulled, the mass, the coefficent of kinetic friction and distance
Answer:
W = F * s
Work done equals applied force * distance traveled
Apparent weight = M g (1 - sin θ) since some of applied force will lighten sled
μ = coefficient of kinetic friction
F cos θ = force applied to motion of sled
s = distance traveled
[μ M g (1 - sin θ)] cos θ * s = work done in moving sled
Note that F = μ M g if applied force is in the horizontal direction
PLEASE HELP DUE SOON AND I'M STUCK ON IT!!! HELP ASAP WILL GIVE BRAINLIEST AND POINTS!!!!
Discussion Topic
Whenever important physicists are discussed, Galileo Galilei, Isaac Newton, and Albert Einstein seem get the most attention. However, as you’ve seen, Galileo formulated or refined many of his discoveries and theories based on the findings of others who came before him, including Aristotle and Nicolaus Copernicus. Likewise, Newton claimed that he “stood on the shoulders of giants” in developing his work. You’ve just begun your study of physics, but from what you know (or can research and find out) take a position that Galileo, Newton, and Einstein deserve this special recognition. Alternately, identify a physicist that you think has been overlooked, compared to these three. Do some research and support your opinion with credible arguments.
[tex]\bold{\huge{\underline{ Answer }}}[/tex]
Well !!! This question seems very interesting
Whenever we discussed about important topics in physics we generally referred galelio galilei, Issac newton and Albert Einstein.
Galelio, Newton and Einstein deserve these special recognition because they are responsible for taking physics/science towards modern era/technology .
If these three physicist/scientist were not in the world then I don't think so we will able to achieve modern technology this much earlier.
Let's discuss the theories given by Galelio galilei, Issac Newton and Albert Einstein Galelio galilei Galelio galilei is very popular Italian physicist. He had given many theories based on astronomy, natural phenomenons around us. When I just started studying physics, the first concept I learned was " The Law of inertia " . which was given by galelio galilei. To explain this law , He proposed a experiment " He dropped the ball on the two inclined plane opposite to each other " .Then, he noticed that , If no external force is applied to a body then it will tends to be in motion. This statement was again restate by newton as its first law's of motion .He also famoused for publishing/proposing the heliocentric theory which was earlier proposed by copernicus. Due to some drawbacks, Galelio proposed it again. Issac Newton :- Issac Newton was a English physicist and earlier he was also considered the God of physics because of his amazing theories. He is the one who is responsible for philosophical revoution .According to me, the real physics is started with the theories given by Issac Newton .He is not just responsible for proposing theories but he is the one who makes us to understand things practically. For example, The three laws of newton - Law of inertia, Law of momentum and law of action - reaction. This laws explain that how the free falling happened. how objects moves etc. Other than three laws of motion, he also proposed theories on the nature of white light , calculus etc. Albert Einstein Albert Einstein is most famous scientists in the world not because of his theories but also because of having highest IQ in the world. Albert Einstein was the German physicist .He proposed many theories. One of the most famous theory is the " Theory of relativity "Well !! The advanced physics is started with the theories proposed by Albert Einstein. His most famous theory is the " Theory of relativity " E = mc² . It states that Energy is directly proportional to the product of mass and square of speed of light. This theory explains the motion of objects in space. Einstein is the one of those scientists who takes the science towards modern era .He is also considered the third founder of quantum physics Other than these I would like to recommend two more physicist Max planks and Neil's Bohr Max planks and Neil's Bohr both are known as the father of quantum physics. Neil's Bohr had proposed the theory on the atomic structure of hydrogen and movement of electrons in an atom. which was the first step towards Quatum physics. Max planks was the one who proposed the Planks quantum theory . It states that " All electromagnetic radiation are forms of energy and he said that radiant energy is not absorbed but discontinously produced in the form of small packets of energy called quanta " . That is, E = hvh is the planks constant having value 6,626 × 10^-34 .Galileo Galilei, Isaac Newton, and Albert Einstein indeed deserve special recognition in the field of physics due to their monumental contributions that revolutionized our understanding of the universe. While they built upon the work of their predecessors, their unique insights and groundbreaking discoveries have shaped modern physics significantly.
1. Galileo Galilei:
Galileo is often referred to as the "father of modern observational astronomy" and the "father of modern physics." He made pioneering observations using telescopes and provided experimental evidence to support the heliocentric model proposed by Nicolaus Copernicus. Galileo's observations of the moons of Jupiter and the phases of Venus further challenged the geocentric view of the universe prevalent at the time. He formulated the laws of motion, laying the groundwork for Newton's later work, and made key contributions to the study of projectiles, buoyancy, and mechanics. His emphasis on experimentation and empirical evidence set the stage for the scientific method.
2. Isaac Newton:
Newton's achievements are immense, and he is considered one of the greatest scientific minds in history. He formulated the laws of motion, universal gravitation, and calculus. His masterpiece, "Philosophiæ Naturalis Principia Mathematica," laid the foundation for classical mechanics and provided a comprehensive mathematical framework for understanding motion and forces in the universe. Newton's work profoundly influenced subsequent generations of physicists and played a crucial role in the scientific revolution of the 17th century.
3. Albert Einstein:
Einstein's contributions transformed our understanding of space, time, and gravity. His theory of special relativity introduced the concept of spacetime and challenged the classical notions of absolute space and time. In his theory of general relativity, Einstein proposed that gravity is the curvature of spacetime caused by the presence of mass and energy. This led to groundbreaking predictions, such as gravitational waves and the bending of light around massive objects. Einstein's work not only advanced theoretical physics but also had practical applications, such as the development of GPS technology.
While these physicists have received significant recognition, it is essential to acknowledge that the history of science is filled with brilliant minds who may not have achieved the same level of fame. One such overlooked physicist is Emmy Noether.
In conclusion, Galileo Galilei, Isaac Newton, and Albert Einstein deserve the special recognition they receive for their exceptional contributions to physics. However, it is important to remember that the history of science is replete with brilliant minds, and physicists like Emmy Noether also made indispensable contributions that have shaped our understanding of the universe.
To know more about Albert Einstein :
https://brainly.com/question/31320432
#SPJ3
WILL GIVE BRAINLEST TO CORRECT ANSWER
10 points
What is the freezing point (0 C) in K?
a.) 32 K
b.) 273 K
c.) 212 K
d.) -273 K
Answer:
B: 273 K
Explanation:
see answer.
What is the electric potential of a 4. 5 × 10-5 C charge that has an electric potential energy of 0. 027 J?.
The value of electric potential will be 6 ×10⁻⁸ V.Electric potential is the quantity of work required to carry a unit charge from a point to a specified location.
What is electric potential?Electric potential is the amount of work needed to move a unit charge from a point to a specific point against an electric field.
The given data in the problem is;
[tex]\rm E_p[/tex] is the electric potential energy = 0. 027 J
V is the electric potential =?
Q is the charge = 4. 5 × 10-5 C
The electric potential energy is given by;
[tex]\rm E_p= Q \times V \\\\ \rm V= \frac{E_p}{Q} \\\\ \rm V= \frac{0.027}{4.5 \times 10^{-5}} \\\\ \rm V= 6 \times 10^{-8} \ V[/tex]
Hence the value of electric potential will be 6 ×10⁻⁸ V.
To learn more about the electric potential refer to the link;
https://brainly.com/question/9383604
The electric potential of the 4.5 × 10^(-5) C charge with an electric potential energy of 0.027 J is 600 J/C.
To find the electric potential (V) of a charge given its electric potential energy (U), you can use the formula:
V = U / q
where V is the electric potential, U is the electric potential energy, and q is the charge.
Plugging in the values you provided:
U = 0.027 J
q = 4.5 × 10^(-5) C
Using the formula, we can calculate the electric potential:
V = U / q
V = 0.027 J / (4.5 × 10^(-5) C)
To simplify the calculation, let's express the charge in scientific notation:
V = 0.027 J / (4.5 × 10^(-5) C)
V = 0.027 J / (0.000045 C)
Now divide 0.027 J by 0.000045 C to find the electric potential:
V ≈ 600 J/C
Therefore, the electric potential of the 4.5 × 10^(-5) C charge with an electric potential energy of 0.027 J is approximately 600 J/C.
For more such questions on electric,click on
https://brainly.com/question/1100341
#SPJ11
What is the height of the cannon before it is launched, at t=0? Remember to include units.
The height of the cannon before it is launched, at t=0, is 58 m.
Model for the motion of the cannon ball
The equation of motion of the cannon ball is given as;
h(t) = -4.9t² + 19.8t + 58
Height of the cannon at time, t = 0The initial height of the cannon before it was launched is calculated as follows;
h(0) = -4.9(0) + 19.8(0) + 58
h(0) = 58 m
Thus, the height of the cannon before it is launched, at t=0, is 58 m.
Complete question is below:
The equation that models the path of a cannon ball is h(t) = -4.9t² + 19.8t + 58. What is the height of the cannon before it is launched, at t=0? Remember to include units.
Learn more about height of motion here: https://brainly.com/question/5687206
What effect does increasing pressure have on gas particles.
Answer:
they go BOOM i seen a gas station do it
Explanation:
An explosion takes place in space. Which type of waves from the explosion can be observed on Earth?
Answer:
Infra red waves, visible light waves,
Explanation:
In what way do sound waves differ from radio waves?.
What is the change in momentum of a 3 kg object accelerating from rest to 12 m/s?
The change in momentum of a 3kg object is 12
How to find final kinetic energy given height, mass, distance, and velocity.
Answer:
KE = 1/2(m)(v^2)
Explanation:
You only need mass and velocity to find kinetic energy
18. True or False...Magma approaches the ocean floor at divergent plate boundaries.
Answer:
your answer to your question is true
A red 5kg brick has an initial location of (0,0) on a flat surface and a velocity of 3m/s in the positive x direction. A tan 2 kg brick has an initial location of (3,0) which is 3 meters away and is stationary. Ignore friction.
The initial center mass of the two bricks is 2 kg.
Center mass of the two bricks
The center mass of the two bricks is determined by combining the momentum of the two bricks, with one as the reference point.
The initial center mass of the two bricksThe initial center mass of the two bricks is calculated as follows;
[tex]M_{cm} = \frac{M_0 + M_1}{v_1 + v_2} \\\\M_{cm} = \frac{5(0) \ + \ 2(3)}{0 + 3} \\\\M_{cm} = 2 \ kg[/tex]
Thus, the initial center mass of the two bricks is 2 kg.
Learn more about center mass here: https://brainly.com/question/13499822
Find the net force on a 1610 kg race car that is accelerating at 14. 2 m/s2
why does the rubber rod push the balloon away, and then why does the glass rod pull the balloon towards it after it is rubbed in fur?
Answer/Explanation:
Rubber is an insulator, meaning it doesn't conduct electricity well. Rubber is a very poor conductor of electricity.
The glass rod, however, is being rubbed with fur which makes the glass rod lose its electrons, leaving it to be only positively charged. The electrons get stripped away and remain on the fur.
Let’s add bees to this food web. Bees get food from flower plants (producers). Choose which consumer bees are. Bees are 1st consumers. Bees are 2nd consumers. Bees are 3rd consumers
Answer:
1st consumers
Explanation:
Because bees feed off of flower plants (producers), they are the first level of consumers.
Something that ate bees would be a secondary consumer, and so on.
Hope this helps!
Little Red travels 30 miles to her grandmother's house at a steady speed of 10 miles per hour. If she leaves at 2pm, what time will she arrive?
Little Red will arrive at her grandmother's house at 5 PM :)
30/10 = 3
2 + 3 = 5
What is the difference between uniform motion and uniformly accelerated motion?.
Answer:
the motion of the difference
A charge of 8. 5 × 10–6 C is in an electric field that has a strength of 3. 2 × 105 N/C. What is the electric force acting on the charge?.
The electric force acting on the charge will be 2.72 N.The application of the forced occupation of one charge on another charge is known as the electric force.
What is electric force?Force on the particle is defined as the application of the force field of one particle on another particle. It is a type of virtual force.
The given data in the problem is;
q is the charge= 8. 5 × 10–6 C
E is the strength of the electric field =3. 2 × 105 N/C.
F is the electric force=?
The electric force is found by;
[tex]\rm F = q \times E \\\\ \rm F = 8.5 \times 10^{-6} \times 3.2 \times 10^5 \\\\ \rm F =2.72 \ N[/tex]
Hence the electric force acting on the charge will be 2.72 N.
To learn more about the electric force refer to the link;
https://brainly.com/question/1076352
True or False. During the 1500s and 1600s evidence from around the world including fossils and glacial deposits and mapped locations of geologic features provided evidence that the continents were indeed once connected.
Answer:
The awsner to that is true
true
becauses betwwen they fights and its easy
At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C? 77°F 95°F 280K 300K.
Answer:
The temperature would be 95F .
Explanation:
At 95⁰F temperature, water has particles with a greater average kinetic energy than water with a temperature of 30°C.
What is kinetic energy?Kinetic energy is a form of energy that an object possesses by virtue of its motion. It is defined as the energy that an object possesses due to its motion and is proportional to the mass of the object and the square of its velocity.
The formula for kinetic energy is:
KE = (1/2)mv²
Where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.
Here in the question,
The kinetic energy of the particles in water increases with temperature. So, we need to find the temperature at which water has particles with a greater average kinetic energy than water at 30°C.
To compare the kinetic energy of water at different temperatures, we can use the formula:
KE = (1/2)mv^2
Where KE is the kinetic energy of the particles, m is the mass of a particle, and v is the velocity of a particle.
The average kinetic energy of the particles in water is proportional to the temperature in Kelvin, according to the formula:
KE = (3/2)kT
Where k is the Boltzmann constant and T is the temperature in Kelvin.
Using this formula, we can find the temperature at which water has particles with a greater average kinetic energy than water at 30°C:
KE1 = (3/2)k(30 + 273.15) = 4.14 x 10^-21 J
To find the temperature at which water has a greater kinetic energy, we need to find the temperature that corresponds to a kinetic energy greater than 4.14 x 10^-21 J.
Option A: 77°F = 25°C = 298.15K
KE2 = (3/2)k(298.15) = 5.06 x 10^-21 J
Option B: 95°F = 35°C = 308.15K
KE3 = (3/2)k(308.15) = 5.55 x 10^-21 J
Option C: 280K
KE4 = (3/2)k(280) = 4.85 x 10^-21 J
Option D: 300K
KE5 = (3/2)k(300) = 5.24 x 10^-21 J
Therefore, the temperature at which water has particles with a greater average kinetic energy than water at 30°C is Option B: 95°F (35°C or 308.15K).
To learn about the Conversion of Kinetic energy click:
https://brainly.com/question/12807194
#SPJ7
A negative charge, q1, of 6 µC is 0. 002 m north of a positive charge, q2, of 3 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2? magnitude: 8 × 101 N direction: south magnitude: 8 × 101 N direction: north magnitude: 4 × 104 N direction: south magnitude: 4 × 104 N direction: north.
Force on the particle is defined as the application of the force field of one particle on another particle. The magnitude and direction of the electrical force will be 4.05×10⁴N towards the north.
What is electrical force?Force on the particle is defined as the application of the force field of one particle on another particle. It is a type of virtual force.
The given data in the problem is
q₁ is the negative charge = 6 µC=6×10⁻⁶ C
q₂ is the positive charge = 3 µC=3×10⁻⁶ C
r is the distance between the charges=0.002 m
[tex]F_E[/tex] is the electric force =?
The value of electric force will be;
[tex]\rm F_E= \frac{Kq_1q_2}{r^2} \\\\ F_E= \frac{9\times 10^9\times 6\times 10^{-6}\times3\times10^{-6}}{(0.002)^2}\\\\ \rm F_E=4.05\times10^4\;N[/tex]
Hence the magnitude and direction of the electrical force will be 4.05×10⁴N towards the north.
To learn more about the electrical force refer to the link;
https://brainly.com/question/1076352
Answer:
DDDD
Explanation:
What is its speed after 3. 83 as if it accelerates uniformly at −3. 04 m/s 2 ? answer in units of m/s.
The velocity equation is [tex]v_{final} =v_{initial} +at\\[/tex]
Known facts:
t = 3.83sa= -3.04intial velocity = 0Plug into equation known quantities:
[tex]v_{final} = (-3.04) * 3.83 = -11.6432m/s[/tex]
Thus the final velocity is -11.6432m/s
Hope that helps!
What is the electric potential 3. 0×10−11 m from a proton (charge +e )? Let V=0 at r=[infinity]
This question involves the concepts of electric potential, charge, and distance.
The electric potential is "48 V".
ELECTRIC POTENTIALThe electric potential of a point in the vicinity of a charge is given by the following formula:
[tex]V=\frac{kq}{r}[/tex]
where,
V = electric potential = ?k = Colomb's constant = 9 x 10⁹ N.m²/C²q = magnitude of charge = 1.6 x 10⁻¹⁹ Cr = distance from charge = 3 x 10⁻¹¹ mTherefore,
[tex]V = \frac{(9\ x\ 10^9\ Nm^2/C^2)(1.6\ x\ 10^{-19}\ C)}{3\ x\ 10^{-11}\ m}[/tex]
V = 48 volts
Learn more about the electric potential here:
https://brainly.com/question/9383604
what effect does speed have on braking distance
Answer:
Here u go :)
Explanation:
The more the speed is, the more braking distance it will need.
Hope it helps.
Answer:
Greater Speed requires Greater braking distance
Explanation:
Not counting road condition tire quality and brake wear inspect your tires and brakes often always allow more safety zone on bad road conditions or when towing another vehicle such as a trailer, Empty trailers are often more dangerous than loaded ones
If a specimen was being viewed using a 20x objective lens and 10x ocular lens, what would be the total magnification
Answer:
As Per Given Information
20x objective lens was used by specimen
10x ocular lens was also used by him.
we have to find the total magnification.
For calculating the total magnification we 'll simply do multiplication
Total Magnification = 20x × 10x
Total Magnification = 200x
So , the total magnification will be 200x .
The total magnification is 200 X
What is Magnification of lens ?
Magnification of lens simply means enlarging or diminishing the image of an object form by the lens used.
Given Information in the question :
Magnification of objective lens used by specimen = 20x
Magnification of ocular lens used by him = 10x
Now the total magnification of lens is calculated below :
[tex]\begin{aligned}\text{Total magnification} &= \text{Objective magnification} \times \text{ocular magnification}\\&=20\times \cdot 10\times\\&= 200\times\end{aligned}[/tex]
Therefore, The total magnification is 200 X which means image will appears 200 times larger then the original object.
check and know more about lens here :
https://brainly.com/question/17014859
#SPJ2
What is the period and frequency of the second hand on a clock?
Answer:
Periods are 60 seconds, 60 minutes and 12 hours frequency are their reciprocal.
Explanation:
For second hand, period = 1 min = 3660 s; frequency = 0.0166
For minute hand, period = 1 hr = 3600 s; frequency = 2.77}
For hour hand, period = 12 hrs = 4300 s; frequency = 2.3}
A young child holds a string attached to a balloon. What is the reaction force to the balloon pulling up on the Earth?
Answer:
Gravity pulls the balloon down.
Explanation: PLS BRAINLIEST
1. A weightlifter applies 210 J of work to tire that weighs 85 N. How far does it move?
2. How long does it take to do 500 joules of work with 25 watts of power?
3. A person riding his bicycle has a weight of 45 N during a quick 30 m trail. if it takes him 600 seconds to complete the trail. How much power did he do?
Answer:
1) 2.47 meters
2) 20 seconds
3) 2.25 watts
Explanation:
1. W = F x S
S = W/F
= 210/85
= 42/17 m
= 2.47 meters
2. P = W/t
t = W/P
= 500/25
= 20 seconds
3. P = W/t
P = F x S/t
= 45 x 30 / 600
= 45/20
= 2.25 watts
