Answer:
Every physical object causes vibrations when it moves in the air. This leads to creation of waves in the air that then continue to travel as a form of sound. Much like the drum example we've mentioned above, our vocal cords also vibrate when we talk. This vibration happens in air, solid mediums and liquid.
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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
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
Oil having a density of 922kg/m^3 floats on water. A rectangular block of wood 3.97 cm high and with a density of 963 kg/m^3 floats partly in the oil and partly in the water. The oil completely covers the block. How far below the interface between the two liquids is the bottom of the block? Answer in units of m.
Explanation:
For the equilibrium:
\rho_{wood}gh-\rho_{oil}g(h-x)-\rho_{water}gx=0ρ
wood
gh−ρ
oil
g(h−x)−ρ
water
gx=0
\rho_{wood}h-\rho_{oil}(h-x)-\rho_{water}x=0ρ
wood
h−ρ
oil
(h−x)−ρ
water
x=0
(974)(3.97)-928(3.97-x)-1000x=0(974)(3.97)−928(3.97−x)−1000x=0
x=2.54\ cmx=2.54 cm
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
For the circuit shown in the figure(figure 1) find the current through each resistor. Express your answers using two significant figures. Enter your answers numerically separated by commas.
The current flowing in each resistor of the circuit is 4 A.
Equivalent resistance of the series resistors
The equivalent resistance of the series circuit is calculated as follows;
6 Ω and 4 Ω are in series = 10 Ω
5 Ω and 10Ω are in series = 15 Ω
Effective resistance of the circuit[tex]\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2} \\\\R = \frac{R_1R_2}{R_1 + R_2} \\\\R = \frac{10 \times 15}{10 + 15} \\\\R = 6 \ ohms[/tex]
Current flowing in the circuitV = IR
I = V/R
I = 24/6
I = 4 A
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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!
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
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.
How many countries have not adopted the metric or si system?.
Answer:
Three countries
Which are United States, Liberia, and Myanmar
Among the substances given below which cannot be electrified by friction
amber, plastic, hacksaw blade
Answer:
Hacksaw blade because it is metal.
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.
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What happens to water when it changes to ice?
Its density increases.
Its density decreases.
Its mass increases.
Its mass decreases.
Its volume increases.
Its volume decreases.
Answer:
its density decreases it volume increases
Explanation:
When water turns to ice, it expands / contracts. Water is more / less dense than ice. The water you drink is a solid / liquid / gas.
What effect does increasing pressure have on gas particles.
Answer:
they go BOOM i seen a gas station do it
Explanation:
what is foundation. please I want a simple definition
Explanation:
Foundation is a creative playground for artists, curators and collectors to experience the new creative economy.
Answer:
a coloured cream, powder, or liquid used as a base to even out facial skin tone before applying other cosmetics.
A stone of volume 800 cm3 experiences an upthrust of 6.5 N when fully immersed in a certain liquid. Determine the density of the liquid.
F = ρgV
6.5 = ρ x 9.8 x 800 x 10⁻⁶
ρ = 829 kg/m³
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:
Find the net force on a 1610 kg race car that is accelerating at 14. 2 m/s2
According to the diagram, (UV) ultraviolet light has a longer wavelength than
A) radio waves
B) infrared
C) x-rays
D) microwaves
Answer:
c. x-rays
Explanation:
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.
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The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain why?
Answer:
Rubber or plastic covers are bad conductors of electricity. So they do not allow the electric current to pass through it.
Explanation:
Rubber and plastic are bad conductors of electricity, therefore when handling a tool with a rubber handle, the electricity will not pass through it.
Answer:
rubber and plastic are insulators and are bad conductors of electricity
what's potential difference?
Explanation:
Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points, which is defined as the work needed per unit of charge to move a test charge between the two points. WikipediaTrue 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
Straight line AB connects two point sources that are 5.00 m apart, emit 300 Hz sound waves of the same amplitude, and emit exactly out of phase.
(a) What is the shortest distance between the midpoint of AB and a point on AB where the interfering waves cause maximum oscillation of the air molecules?
(b) What are the (b) second and (c) third shortest distances?
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.
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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.
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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
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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].)
if a pair of forces are in the same direction but with different magnitudes these forces are
A. balanced
B. unbalanced
C. in equilibrium
D. non-existent
What is the difference between uniform motion and uniformly accelerated motion?.
Answer:
the motion of the difference
which option is the best blackbody radiator?
Answer: The sun
Explanation: Trust me bro?
What is the atomic bomb equivalent of energy released during a 7. 0 quake? an 8. 0 quake? a 9. 0 quake?
Answer:
7. 0 = 500 kilotons of TNT = 2.0 x 10^15 joules
8.0 = 15 million tons of TNT = 6.3 x 10^16 joules
9.0 = 500 million tons of TNT = 2.0 x 10^18 joules
atomic bomb dropped on Hiroshima had a equivalent of 15 kilotons TNT
Explanation:
formula :
log E = 5.24 + 1.5M
M is richter scale magnitude
if 8.3 = richter scale magnitude
log E = 11.8 + 1.5M Write the formula.
log E = 11.8 + 1.5(8.3) Replace M with 8.3.
log E = 24.25 Simplify
10^log E = 10^24.25
E = 10^24.25
E ≈ 1.78 x 10^24 ergs ≈ 1.78 × 1017 joules
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