An object in motion eventually stops because of friction.
What is Newton’s first law of motion?Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or continue its moving in a straight line at constant speed unless force is applied on it.
So we can conclude that An object in motion eventually stops is the correct answer.
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If these cranes make the work being done ten times easier, what is the mechanical advantage?
A. cannot be determined
B. ten
A scientist shines light from a source onto a piece of metal, and no electrons are released by the metal. Increasing the intensity of the light source does not change this result. What is this effect, and how do scientists explain it?
This is the Doppler effect, and it is best explained by the wave model of light.,
This is the Doppler effect, and it is best explained by the particle model of light.
This is the photoelectric effect, and it is best explained by the wave model of light.,
This is the photoelectric effect, and it is best explained by the particle model of light.
This is the photoelectric effect, and it is best explained by the particle model of light.
What is the photoelectric effect?The photoelectric effect refers to the emission of negatively charged particles and electromagnetic radiation that hits an object.
The photoelectric effect shows how electrons can be released from a given object when this material is absorbing electromagnetic radiation.
The photoelectric effect is a fundamental piece of evidence for understanding the nature of light particles.
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(HELP ASAP! WILL MARK BRAINLIEST) How would you paraphrase: A powerful practical and spiritual relationship between the people and their environment was forged by their dependence upon its resources.
Answer:
The people's reliance on the environment's resources generated a deep practical and spiritual link between them and it.
Explanation:
Which of these diagrams is a convex mirror? A vertical rectangular box with a left side that bows out. A vertical rectangular box. A vertical rectangular box with a left side that bows in.
A vertical rectangular box with a left side that bows out is a convex mirror. A convex mirror reflects light outwards, it cannot be utilized to concentrate light.
What is a convex mirror?
A convex mirror, also known as a curved mirror, has a reflecting surface that bulges toward the light source. A curved mirror's surface can be convex, or bulging outward, or concave, or bulging inward.
A convex mirror is a hollow spherical is divided into pieces, the exterior surface of each cut portion is painted. The image of the plant has real, inverted, and smaller characteristics.
A vertical rectangular box with a left side that bows out is a convex mirror. A convex mirror reflects light outwards, it cannot be utilized to concentrate light.
Hence, option A is correct.
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Answer:
the answer is a
Explanation:
how much should the telescope accelerate towards or away from the
How much should the telescope accelerate towards or away from the sun?
The angular velocity depends on the length of the orbit and the orbital speed of the telescope?
How does valles marineris differ from the grand canyon?.
Explanation:
Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep.
Why are theories that are wrong as important as theories that are correct? science
Dont put whatever OR else ill report
Answer:
A theory is an opinion but in fancy format.
Explanation:
it is an explanation of observed regularities. The terms "established" and "observed regularities" are important here.
A theory is a way to explain a opinion on a certain topic.
Many people use microwave ovens to cook their food with is best
Answer:
microwave ovens are better for crispy foods microwaves are better for re heating food or microwave food
Explanation:
Which law represents a balanced chemical equation? A. Avogadro’s hypothesis B. ideal gas law C. law of conservation of mass D. Newton’s first law of motion E. Newton’s second law of motion
The voltage in american household is 120 v. however, because we use a/c power, the voltage is oscillating between two maximums. what is the maximum or peak voltage required to produce an average voltage of 120 v?.
Answer:
188 v
Explanation:
The average of a sine wave is .637 times the peak value
.637 x = 120
x = 120 / .637 = 188 v
The voltage in an American household is 120 v. however because we use a/c power, the voltage is oscillating between two maximums, then the maximum or peak voltage required to produce an average voltage of 120 Volts would be 76.44 Volts.
What is power?The rate of doing work is known as power. The Si unit of power is the watt.
Power = work / time
The mathematical expression for the power is as follows
P = VI
As given in the problem, the voltage in American household is 120 v. however, because we use a/c power, the voltage is oscillating between two maximums.
The average voltage (VAV) of a sinusoidal waveform is determined by multiplying the peak voltage value by the constant 0.637, which is two divided by pi (π).
The maximum voltage = 120 × 0.637
= 76.44 Volts
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Question #18:
A steam engine (assume a Carnot engine) has an efficiency of 34.8%. If the waste heat has a temperature of 76 °C, what is the temperature of the boiler? Answer in units of °C.
The temperature of the boiler of the steam engine at the efficiency of 34.8% and waste heat temperature of 76 °C, is determined as 116.56°C.
Efficiency of a Carnot engineThe efficiency of a Carnot engine is determined using the following formula;
n = 100% x (TH - TC)/TH
where;
TH is the temperature of the hot reservoirTc is the temperature of the cold reservoir34.8% = 100% x (TH - 76)/TH
0.348 = (TH - 76)/TH
0.348TH = TH - 76
0.652TH = 76
TH = 76/0.652
TH = 116.56°C
Thus, the temperature of the boiler of the steam engine at the efficiency of 34.8% and waste heat temperature of 76 °C, is determined as 116.56°C.
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A resistor of 4 ohms is connected isn series to a box speaker of unknown resistance.If a current of 0.6A flows through the speaker when a voltage of 12V is applied across the combination, calculate: 1. the total resistance in the circuit. ii. the resistance of the speaker ili. the voltage applied across the speaker
Answer:
the total resistance: 20 ohms
the resistance of the speaker: 16 ohms
the voltage across the speaker: 9.6V
4. If it requires 19,208 J to lift an object in 10s, how much power is needed?
Answer:
1920.8
Explanation:
If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh. We define this to be the gravitational potential energy (PEg) put into (or gained by) the object-Earth system
Neutrons are also known as____
neutrinos
photons
alpha particles
beta particles
Answer:
Beta Particles
Explanation:
Ten reasons why we study physics
Explanation:
You Can Solve Problems. ...
A Wide Range Of Career Opportunities. ...
It Keeps You On Your Toes. ...
It Complements Different Subjects, Such As Maths. ...
It Gives You A Challenge. ...
You Could Work Overseas. ...
Acquire Skills Valuable To Employers.
Appreciate Modern Technology
Embrace Post Graduate Research Opportunities
How did the development of electrical signals sent through wires change communication?
A. The electrical signals were more accurate than optical semaphore signals.
B. Signals were amplified with distance.
C. Signals could be sent anywhere a wire could reach and no longer were restricted to line of sight.
D. Signals no longer attenuated with distance.
A
Explanation:
The electrical signals were more accurate than optical semaphore signals.
The development of electrical signals sent through wires change communication as signals could be sent anywhere a wire could reach and no longer were restricted to line of sight.
What is wire communication?Wired communication refers to the transmission of data over a wire-based communication technology.
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A sound wave passes through regions of the ocean with varying density. How do the varying wavelengths correspond to the density of the water
Sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.
Speed of soundWe know that sound is a wave whose medium of propagation isthrough matter. Hence, sound move faster in a dense object than in a less dense object.
As such, sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.
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who would benefit of your own handled problem?why?
Answer:
Define the problem . what's exactly going on ?
- set some goals
- examine the consequences
- put your solution into practice
- brainstorm possible solutions
- Team working
Explanation:
ANY PROBLEM RELATED TO MANI CUSTOMER BILLING ACCOUNTING IN BOOKKEEPING ETC
NING A WAY TO MAKE THE COMPANY MORE PRODUCTS FIDABLE THROUGH NEW SERVICE OR PRODUCT OFFERING NEW PRICING IDEA PROMOTING AND SALES IDEA
This type of soil is found in warm, humid climates. question 5 options: pedocal laterite pedalfer humus
Answer:
Laterite would be your answer.
Explanation:
I hope this helps!
Laterite is the type of soil is found in warm, humid climates.
What is laterite soil?Laterite is rich in iron and aluminum soil and rock type that is thought to have originated in hot, humid tropical climates. Nearly all laterites are of rusty-red hue, because of significant iron oxide concentration.
They form as a result of intense and extended erosion of the underneath rock material, which occurs most often when there are high temperatures and significant rainfall, with alternate wet and dry intervals.
Tropical weather is a long-term chemical weathering process that results in a wide range of soil thickness. Laterite is the type of soil is found in warm, humid climates.
Hence laterite is the correct option.
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Francis is standing at a railway crossing. A train sounds its horn as it moves toward him at a speed of 45 km/hr. If the train conductor hears the horn at 287 Hz, what frequency (in Hz) does Francis hear?
The frequency observed by Francis when the train approaches is 297.4 Hz.
Doppler effect
The frequency observed by Francis is determined by applying the principle of Doppler effect.
The frequency observed by Francis is calculated as follows;
[tex]f = f_o(\frac{V}{V \pm V_s} )[/tex]
where;
f is the source frequencyf₀ is the observed frequencyVs velocity of the source when it is moving towards the observerV is velocity of sound45 km/h = 12.5 m/s
Speed of sound in air = 343 m/s
Since the train is moving towards the observer, the frequency heard by the observer will be greater than the source frequency, thus we will choose positive sign for the source velocity.
[tex]f = f_o(\frac{V}{V + V_s} )\\\\287 = f_0 (\frac{343}{343+ 12.5)} )\\\\287 = 0.965f_0\\\\f_0 = \frac{287}{0.965} \\\\f_0 = 297.4 \ Hz[/tex]
Thus, the frequency observed by Francis when the train approaches is 297.4 Hz.
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Has the United States always been a country with many formal organizations
Answer:
yes
because they love you
What is the result of a short circuit that bypasses all resistors in a circuit?
Answer:
All of the current flows through the short circuit branch and Bypasses the other branches. This causes the excessive amount of current to flow since there is practically no resistance. Short-circuit across the power supply can damage or destroy it.
Explanation:
Hope this helps you!
1. A particle has a mass of 10 kg and a velocity of 5 m/s. What is the momentum of the
particle?
✰ Concept :-
⠀
We know that momentum is the product of mass and velocity. Thus, by the following definition, we get :-
⠀
[tex] \qquad \maltese \: \underline{ \boxed{ \purple{ \sf Momentum = Mass \times Velocity }}} \: \star[/tex]
⠀
✰ Given Information :-
⠀
A particle has mass 10 kgMoving with velocity 5 m/s⠀
✰ To Find :-
⠀
The momentum of the particle⠀
✰ Solution :-
⠀
Using the formula from the concept section, we get :-
⠀
[tex]\sf \longrightarrow Momentum =10 \: kg \times 5 \: {m}^{ - 1} ~~~ \\ \\ \\\sf \longrightarrow Momentum = {50~kg \: ms}^{ - 1} \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \\ \sf \longrightarrow \underline{ \boxed{ \frak{ \orange{Momentum = {50 ~kg\: ms}^{ - 1} }}}} \: \star \: \: \: \: \: \: \\ \\ [/tex]
Thus, the momentum of the particle is 50 kg m/s.
⠀
[tex] \underline{ \rule{230pt}{2pt}} \\ \\ [/tex]
Calculate the direction cosines of a→+b→, given that a→=4i^+7j^-5k^ and b→=3i^+4j^+k^
The direction cosines of a→+b→, are
cos ∝ = 0.5232 cos β = 0.8065 cos γ = 0.2933Given data:
a = 4i^ + 7j^ - 5k^
b= 3i^ + 4j^ + k^
Calculate the direction cosines of a→+b→a→+b→ = 7i + 11j - 4k
( a→+b→ ) / | a→+b→ | = ( 7i + 11j - 4k ) / [tex]\sqrt{7^2 + 11^2 + 4^2 }[/tex]
= ( 7i + 11j - 4k ) / 13.64
= 0.5232 i + 0.8065 j + 0.2933 k
Therefore the direction cosines are
cos ∝ = 0.5232
cos β = 0.8065
cos γ = 0.2933
Hence we can conclude that the direction cosines of a→+b→ are as listed above.
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What happens to Earth’s surface when horizontal pressure is applied to rocks?
Answer:
They fold to create ridges and valleys perpendicular to the direction to which pressure is applied.
You catch a 219 g ball moving at 6.1 m/s. If you catch the ball in a time period of
0.138 s what is the magnitude of the average force you must supply to the ball to
stop the ball?
Answer in units of Newtons (N)
Answer:
The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.
Explanation:
Let's think Newton's 2nd Law: F = ma.
We are given the mass of the ball: 219 g ⇒ .219 kg.
We are given the initial velocity, time, and final velocity of the ball ∴ we can solve for acceleration.
We are trying to find the force needed to stop the ball.
Let's find the acceleration of the ball first.
We have the initial velocity of the ball, 6.1 m/s.We have the time it would hypothetically take the ball to stop, .138 s.We have the final velocity of the ball, 0 m/s (since we are trying to stop the ball).Now, we can plug these known values into this kinematic equation and solve for acceleration, a.
v = v₀ + at 0 = 6.1 + a(.138) -6.1 = .138a a = 44.2029 m/s²Substitute acceleration and mass into F = ma and solve for the force.
F = (.219)(44.2029) F = 9.68 NThe magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.
Two pulses are moving along a string. one pulse is moving to the right and the second is moving to the left. both pulses reach point p at the same instant. an illustration with a rectangular crest moving toward the right and a triangular trough going toward the left both toward point p and equidistant from p. which diagram shows the appearance of the string after the pulses pass point p? an illustration with the triangular trough in the middle of the rectangular crest to the left of point p. an illustration with the triangular trough in the middle of the rectangular crest to the right of point p. an illustration with a rectangular crest moving toward the right past p and a triangular trough going toward the left past p. an illustration with a rectangular crest moving toward the left and a triangular trough going toward the right both away from point p and equidistant from p.
The two pulses will have Constructive interference. Constructive interference occurs when the maxima of two waves add together (the two waves are in phase), so that the amplitude of the resulting wave is equal to the sum of the individual amplitudes.
What is constructive interference?
Constructive interference occurs when the maxima of two waves add together (the two waves are in phase), so that the amplitude of the resulting wave is equal to the sum of the individual amplitudes. Equivalently, the minima of the waves would be aligned
This is an example of a standing wave produced when two ends of a string are oscillated in the same plane. The displacement of of point on two ends oscillates vertically.
We are given that two pulses move along the string each coming towards each other and meet at a common point ( P ).
Each pulse have their own magnitude or displacement in the vertical plane. If the pulses are to meet at a common point at the same instant, then they interfere with each other constructively.
Where constructive interference of two pulses is the addition of magnitudes of induvidual pulses and form a single puls of the constructed magnitude.
magnitude ( New pulse ) = magnitude (Pulse 1) + magnitude (Pulse 2)
Hence the two pulses will have Constructive interference
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Answer:
C
Explanation:
edge 22
True or False : Waves lose most of their energy when traveling across the ocean.
Answer:
true
Explanation:
that's the answear
Answer:
it is false i got
Explanation:
it right
In terms of the wavelength of the sound wave, how far apart are the first two resonant positions in the resonance tube?.
Answer:
The lunar highlands were formed about 4.5 billion years ago, they are the oldest features (or regions) on the moon. The maria were formed some 3.5 billion years ago, erasing and covering the 'highlands' in the regions they formed.
Explanation:
In case of the resonance tube, the first two resonant positions of sound wave are separated by one-quarter of its wavelength.
What is acoustic resonance?
An acoustic system would amplify sound waves whose frequency matches one of its own natural vibrational frequencies as a result of a process known as acoustic resonance.
Since most acoustic instruments use resonators, such as the length of a flute's tube, the strings and body of a violin, and the form of a drum membrane, acoustic resonance is a crucial factor for instrument builders. For hearing, acoustic resonance is also crucial.
The separation between two consecutive nodes or antibodies is equivalent to half the wavelength. A node's distance from its next antinode is equal to one-quarter of its wavelength.
In case of the resonance tube, the first two resonant positions of sound wave are separated by one-quarter of its wavelength.
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Practice Problems
31. Follow-up Suppose the coefficient of kinetic friction is equal to
0.120. What is the acceleration of the salt shaker in this case?
32. A baseball player slides into third base with an initial speed of
40 m/s. If the coefficient of kinetic friction between the player and the
(a) The acceleration of the salt shaker is 1.18 m/s².
(b) The distance traveled by the baseball player before coming to rest is 204.1 m.
Acceleration of the salt shakerThe acceleration of the salt shaker at the given coefficient of kinetic friction is determined as follows;
a = μg
a = 0.12 x 9.8
a = 1.18 m/s²
Acceleration of the baseball player is calculated as follows;
a = μg
a = 0.4 x 9.8
a = 3.92 m/s²
Distance traveled by the baseball playerThe distance traveled by the baseball player before coming to rest is calculated as follows;
v² = u² - 2as
0 = 40² - 2(3.92)s
0 = 1600 - 7.84s
7.84s = 1600
s = 204.1 m
The complete question is below:
A baseball player slides into third base with an initial speed of 40 m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?
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