Answer:
Explanation:
Remark
The answer is in the formula
E = I * R
E = the voltageI = the CurrentR = the ResistanceSolution
Let the resistance = R
I = 12/R
If we increase the resistance by 20% then we get
R1 = R + (20/100) * R
R1 = R + 1/5 * R
R1 = 6 R/5
What happens to I when you do this
I = 12/(6/5 R) Effectively you need to treat 6/5 as a reciprocal
I = 12 * 5/6 * R
I = 10 / R
What does this tell you? Since the Resistance has a base value of R, when increased by 20%, the numerator of the fraction is reduced to 10 from 12. In other words the current is now smaller when R goes up.
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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A hand exerciser utilizes a coiled spring. A force of 108.0 N is required to compress the string by 0.0191 m. Determine the force needed to compress the spring by 0.0440 m. N
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
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:
Please disregard. Didn't mean to post a question.
Oops.
That's my bad then.
Which is not an example of a scalar?
a) 6.2 m north
b) 2 ft/s
c) 3 kg
d) -100 o C
Answer:
b) 2ft/s
Explanation:
A scalar has only magintude, not direction
6.2m, 3kg, and -100 o C are all scalars because they only have magnitude.
2ft/s is not a scalar because it has a direction.
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
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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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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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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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
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;
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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As of 2022, what is the total population of the planet?.
Answer:
the total population of the planet is 248
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.
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.
3) In which model are atoms imagined as tiny balls?
a) Dalton
b) Thomson
c) Rutherford
d) Bohr
Answer:
a) Dalton
Explanation:
In Dalton's model atoms are imagined as tiny balls. This model was introduced in the year 1803 by John Dalton.
Based on the tug of war pictured below, what is the net force? –190 n 10 n –10 n 190 n
The net force in the tug of war which is shown in the picture provided will be 0N.
What is a Force?This is defined as the power exerted on a body and the unit of Force is referred to as Newton.
In the tug of war, the net force is gotten by summing up all the forces.
–190N + 10N –10N + 190N = 0N.
Therefore the net force is 0N.
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Answer:
B. 10 N
Explanation:
EGDE 2022
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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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:
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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Where must the moon be in its orbit for the full moon phase to be visible?.
Answer:
On the side of the Earth opposite from the sun
Explanation:
As our Moon continues its orbit counterclockwise around Earth (viewed from above the north pole), more and more of the illuminated part of the Moon becomes visible to us, until it reaches the “full Moon” stage. A full Moon occurs when the Moon has moved in its orbit so that Earth is “between” the Moon and the Sun.
Answer: the sun:
Explanation:
the moon reflects the light coming from the sun. hope this helps. Can I pls have brainllyistbrainllyistbrainllyistbrainllyist
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
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)
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:
Science!!
How much TIME would it take for Plutonium-239 to decay 50g of its original substance to 12.5g?
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
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:
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