By Hooke's law, the spring exerts a restoring force with magnitude F when compressed by a distance x according to
F = kx
where k is the spring constant. Solve for k :
k = F / x = (108.0 N) / (0.0191 m) = 5654.45 N/m
Now solve for F when x = 0.0440 m :
F = (5654.45 N/m) (0.0440 m) = 248.796 N ≈ 249 N
Science!!
How much TIME would it take for Plutonium-239 to decay 50g of its original substance to 12.5g?
The composition of a star is determined from... Group of answer choices the amount of shift in the spectral lines in the spectrum. the pattern of spectral lines in its spectrum. the depth of spectral lines in the spectrum. the red or blue shift of spectral lines in a spectrum the width of the spectral lines in the spectrum
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
What is spectroscopy ?The study of light and other radiation absorption and emission by matter is called spectroscopy. Electromagnetic radiation into its constituent wavelengths, in a spectrum, just like a prism splits light into a rainbow of colors.
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
Hence, option D is correct.
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Hello people ~
In which of the following forms is the energy stored in a capacitor?
(a) Charge
(b) Potential
(c) Capacitance
(d) Electric field
Answer:
Potential
Explanation:
The most accurate term is Electrostatic potential energy
It is denoted as UCIt's named like this because the force between charges or electrons is called electrostatic force .
a 10. kg ball thrown into the air. it is going 3.0 m/s when thrown. how much potential energy will it have at the top?
Answer:
45 j
Explanation:
At the top, the KE will have been converted to PE
KE = 1/2 mv^2 =PEat-top = 1/2 10 *3^9 = 45 j
Part 1- An ideal gas, initially at a volume of 1.71429 L and pressure of 7 kPa, undergoes isothermal expansion until its volume is 6 L and its pressure is 2 kPa. Calculate the work done by the gas during this process. Answer in units of J.
Part 2- Find the heat added to the gas during this process.
Answer in units of J.
Part 1- The work done by the gas during this process will be 5.65 ×10⁻³ kJ.
Part 2-The heat added to the gas during this process will be 5.65 ×10×10⁻³ kJ.
What is work done by the gas?Work is the product of pressure p and volumes V during a volume change for such a gas. The work seems to be the area under the curve that indicates how the state changes.
The work done under the isothermal process is;
[tex]\rm W= P_1V_1 log_e(\frac{P_1}{P_2} )\\\\ W= 7 \times 1.71429 \times 10^{-3} log_e(\frac{7 }{2} )\\\\\ W= 0.0044 \ kJ[/tex]
For the isothermal process;
ΔU=0
[tex]\rm \triangle Q = \triangle E + \triangle W \\\\ Q = 0 + 5.65 \times 10^{-3}\\\\ Q = 5.65 \TIMES 10^{-3} \ kJ[/tex]
Hence, the work done, and the heat added by the gas during this process will be 5.65 ×10⁻³ kJ and 5.65 ×10×10⁻³ kJ respectively.
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Your neighbor is riding her bike around the block. When she slows down and turns a corner, what changes about her?.
Answer:
nothing
Explanation:If you ride a bike around the block and return to the exact point where you started, your displacement is zero.
By definition, displacement involves changing an object from its original position. No matter how far or for how long a body moves, if it returns to the position it started from, it has not been displaced at all. This means that the body has zero displacements.
Question 7 Points 2
The bicycle lamp glows when the bicycle's generator touches the wheel. This is because
Answer:
The dynamo has a wheel that touches the back tyre. As the bicycle moves, the wheel turns a magnet inside a coil. This induces enough electricity to run the bicycle's lights. The faster the bicycle moves, the greater the induced voltage - and the brighter the lights.
Because of the bicycle's actions, the wheel turns a magnet internal a coil. This induces enough strength to run the bicycle's lighting fixtures. The faster the bicycle movements, the greater the caused voltage - and the brighter the lights.
What type of modern is produced with the aid of a bicycle dynamo?A trendy dynamo creates an instantaneous modern-day (DC) – a one-directional waft of electrical rate. A bicycle dynamo creates an alternating current (AC), which reverses course from time to time.
A dynamo is a tool normally positioned inside the hub of a motorcycle's wheel that converts the energy generated by means of the wheel spinning to electric power. That energy is then used to run front and rear dynamo lights at the bike, offering constantly-on illumination without the want to change the lighting.
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The main illustration in the video shows the life track of a one-solar mass star. Each point along this track represents __________.
Each point along the track of one solar mass star represents the star's surface temperature and luminosity at one time.
What is the one-solar mass star?A star having a mass equal to the mass of the Sun is called a one-solar mass star.
Its life track shows the luminous intensity as well as the surface temperature.
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The sky is dark at night: Group of answer choices because the stars in the Milky Way are far away. because the Sun is on the other side of Earth. because there are far fewer stars on the night side of Earth. because all the light from all the objects in the unive
Answer:
Sun is on the other side
Explanation:
If it is brittle, dissolves easily in water, has a high melting point, and conducts electric current it is a(n) __________.
Answer:
Ionic Compound
Explanation:
We know that an ionic compound dissolves easily in water. Its melting point is very high, and it is a conductor.
The equation for Ionic Compound (IC) versus Electricity (EC) is
IC=1/2 divided by EC
EC is the base for the mathematics, so EC is a base warmth at 360.
360 divided by 1/2 is 180
That is the speed in which the current has.
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what effect would you expect the termperature of a material to have on the ease with which electrons can be ejected from it via the photoelectric effect
Answer:
The photoelectric effect is a phenomenon in which the photoelectrons are emitted from the metal when an incident electromagnetic wave hits the metal. The incident light should have a threshold frequency to meet the work function of the metal
1 1.3.3 Test (CST): Marketing and
Question 19 of 20
What does the Federal Reserve help regulate?
A. Music
B. Clothing
C. Food
D. The economy
The Federal Reserve helps to regulate the economy of the United States. So, the correct option is D.
What is meant by marketing ?Marketing is defined as the activities done for promoting the products through creating offers and communicating to the customers.
Here,
The Federal Reserve of the United state is functioning as a Central Bank, such that they are maintaining the financial aspects of the system.
The Federal Reserve has a great role in regulating the financial system and at the same time, the establishing of the monetary policies.
The primary functions of the Federal Reserve includes the functions of maintaining the banking operations and reliable payments for the system.
Hence,
The Federal Reserve helps to regulate the economy of the United States.
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If a star is 10 parsecs away, how long ago did the light we see from it tonight begins its journey toward us?
Answer:
32.6 years
Explanation:
How much energy must the shock absorbers of a 1200-kg car dissipate in order to damp a bounce that initially has a velocity of 0. 800 m/s at the equilibrium position
Answer:
384 joule
Explanation:
mass(m) = 1200 kg,velocity(v) = 0.800m/s, Kinetic Energy(KE) = ? We know that, KE = 1/2 m× v×v, = 1/2× 1200×0.800×0.800 = 600× 0.64 = 384 joule
A stone dropped from the roof of a single-story building to the surface of the earth:
A.
falls because of the natural tendency of all objects to rest on the surface of the earth.
B.
reaches a maximum speed quite soon after release and then falls at a constant speed thereafter.
C.
speeds up as it falls because the gravitational attraction gets considerably stronger as the stone gets closer to the earth.
D.
speeds up because of an almost constant force of gravity acting upon it.
E.
falls because of the combined effects of the force of gravity pushing it downward and the force of the air pushing it downward.
Answer:
D
Explanation:
Gravity is a force that pulls objects down toward the ground. When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion.
A=9.8m/s^2 or the gravitational accelerational
If a stone dropped from the roof of a single-story building to the surface of the earth speeds up because of an almost constant force of gravity acting upon it,there4fore the correct answer is option D.
What is gravity?It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another,
For any free-falling object, the acceleration due to gravity is constatant.
The correct response is option D if a stone thrown from the roof of a one-story structure to the surface of the ground accelerates due to an almost constant force of gravity acting upon it.
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Name one non-metal that is a good conductor and why??
Answer:
silver
Explanation:
It is because it contains a higher number of movable atoms ( free electrons)
What is water scarcity?
Answer:
Water scarcity can mean scarcity in availability due to physical shortage, or scarcity in access due to the failure of institutions to ensure a regular supply or due to a lack of adequate infrastructure.
Explanation:
A main difference between asteroids and comets is that asteroids are mostly made of rock and comets are mostly made of.
Explanation:
Comets are mostly made of ice and dust
Answer:
The main difference between asteroids and comets is their composition, as in, what they are made of. Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material. Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago.Explanation:
A vertical spring launcher is attached to the top of a block and a ball is placed in the launcher, as shown in the figure. While the block slides at constant speed to the right across a horizontal surface with negligible friction between the block and the surface, the ball is launched upward. When the ball reaches its maximum height, what will be the position of the ball relative to the spring launcher?.
For a vertical spring launcher is attached to the top of a block and a ball is placed in the launcher, the position of the ball will be behind the box
What will be the position of the ball relative to the spring launcher?Generally, the equation for the conservation of momentum principle is mathematically given as
(M+m) V1 = M*V2
Therefore, with the ball moving forward we have that; the ball at top it wii be behind the box,
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Answer:
Above and to the left of the spring launcher
Explanation:
The ball would be to the left of the box because the box is moving to the right at a constant speed. And when the ball goes and reaches its maximum height, the box would have passed the ball.
A 9-kg body has three times the kinetic energy of an 4-kg body. Calculate the ratio of the speeds of these bodies.
Answer:
speed 9/speed 4 = 2sqrt3 / 3
Explanation:
KE = 1/2 m v^2
for 9 kg = 3 * the 4 kg 1/2 (9)va^2 = 3* 1/2 (4) vb^2
va^2 / vb^2 = 3* 1/2 (4) / (1/2 *9)
6 / 4.5
va / vb = sqrt (6/4.5) = 2sqrt3 /3
ratio of the 9 speed to the speed of the 4 is 2 sqrt 3 /3
How can you increase the torque you are putting on a lever, without exerting any more force?
Answer:
See below
Explanation:
Torgue = f * distance basically ...so if you want to increase torque with same f then the distance ( lever arm) must be increased
To increase the torque applied on a lever without exerting any more force, the length of the lever arm must be increased.
What is meant by torque?Torque is defined as the rotational analogue of force. It is the product of the applied force and the perpendicular distance.
Here,
A lever is a simple machine composed of a stiff beam and a fulcrum. Both the load and the effort are applied to the beam's ends (input force and output force, respectively).
The location on which the beam pivots is known as the fulcrum. When a force is exerted on one end of a lever, the opposite end of the lever experiences a load.
The expression for the torque acting on a lever arm is given by,
Torque, τ = Length of lever arm x Force applied
τ = L x F
From the equation, it is clear that the torque acting on the lever arm is directly proportional to its length.
τ ∝ L
Therefore, as the length of the lever arm increases, the torque applied also increases.
Hence,
To increase the torque applied on a lever without exerting any more force, the length of the lever arm must be increased.
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what characteristics are shared by both heating and cooling curves? choose 4
The characteristics shared by both heating and cooling curves is that phases changes when the temperature stays the same.
What is heating and cooling?Heating is the process by which the temperature of a place or substances or object is increased.
Cooling Is the process of lowering the temperature of a substance or object by using conditioners or by freezing .
Therefore, The characteristics shared by both heating and cooling curves is that phases changes when the temperature stays the same.
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If force = mass x acceleration, then if an object has a mass of 10 grams
and the acceleration of 20 m/s, what is the force on the object?
Answer:
10g to kg=0.01
20×0.01=0.2
Force of 0.2N
Find the time required to move from the equilibrium position directly to a point a distance 12.3 cm away.A cheerleader waves her pom-pom in SHM with an amplitude of 18.0 cm and a frequency of 0.855 Hz
The time required to move from the equilibrium position directly to a point a will be 0.879 sec.
What is the period of oscillation?The period is the amount of time it takes for a particle to perform one full oscillation. T is the symbol for it. Taking the reciprocal of the frequency yields the frequency of the oscillation.
The standard equation for the SHM is found as;
[tex]\rm x = asin \omega t \\\\ \rm 12.3 \times 10^{-2} = 18.0 \times 10^{-2}sin \omega t \\\\ 0.6833=sin \omega t \\\\ \omega t =sin^{-1}0.6833 \\\\ \omega t =0.7522 \\\\ t = \frac{0.7522}{0.855 } \\\\ t=0.879\ sec[/tex]
Hence the time required to move from the equilibrium position directly to a point a will be 0.879 sec.
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Choose the true statements about electric fields and forces. (Choose 3)
Electric fields can be positive or negative.
Electric fields have a south pole and a north pole.
Electric fields can attract or repel objects.
Electric forces are strongest near the charged object.
Electric forces are strongest farther from the charged object.
Electric fields only repel objects.
Answer:
The three best answers are:
Electric fields can be positive or negative (depending on source)
Electric fields can attrace or repel objets (assuming the object is charged)
Electric forces are strongest near the charged object E ∝ 1 / R^2
For further Reflection
# Do you find Legrain's arguments and examples compel.
ling? Could cultural exchanges such as those detailed in
Legrain's article be more complicated or problematic than
Legrain proposed? Consider how other cultural products-
perhaps those from Africa or Asia--might either uphold or
undermine Legrain's thesis on globalization
Source Philippe Legrain. "Cultural Globa ization
Answer:
Possible Answers:
How the points made can be more complicated or problematic:
The author seems to be focusing on pop culture or pastime activities.
The author isn’t taking into account economic differences between the average citizens of different nations.
All of these examples still follow the American idea of capitalism, not other economic systems.
Explanation:
pf
Jessie and Jaime complete a 5.0 km race. Each has a mass of 68 kg. Jessie runs the race at 15 km/h; Jaime walks it at 5 km/h. How much metabolic energy does each use to complete the course
The total metabolic energy used by each to complete the course is determined as 656.91 J.
Kinetic energy of Jessie and JaimeThe kinetic energy of Jessie and Jaime is calculated as follows;
K.E = ¹/₂mv²
where;
m is mass of Jaimev is speed15 km/h = 4.17 m/s
5 km/h = 1.39 m/s
K.E = ¹/₂(68)(4.17)² + ¹/₂(68)(1.39)²
K.E = 656.91 J
Thus, the total metabolic energy used by each to complete the course is determined as 656.91 J.
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What does the law of reflection describe?
a a) Wavelength b) Bending of light c) Angles d) Mirrors only e) Laser light
Answer:
e
Explanation:
I think hope it's correct
A uniform solid sphere of unknown radius and mass floats exactly half-submerged in a fluid of density 999 kg/m3. Find the density of the material of which the sphere is made (in kg/m3).
Answer:
Explanation:
ρ =
making mass subject of formula we have
m=ρv
from the question aluminium and zinc have same mass hence we can say;
A laboratory experiment produces a single-slit diffraction pattern on a screen. If the slit is made narrower, the bright fringes will be:.
Answer:
fringes move farther
Explanation:
The relation between the distance between the fringes is given by
y = Dλ/d
where, D is the distance between the plane of slit and the screen
d is the width of slit, λ is the wavelength of light used.
As the slit made narrower, that means d decreases, the value of y increases, that means the fringes move farther.