Answer:
Below
Explanation:
I believe that equation is v = sqrt ( 19.6 h )
when h = 21 :
v = sqrt (19.6 * 21) = 20.3 m/s
a satellite is orbiting the earth at an altitude of 290 km. what is the approximate size of the smallest object on earth that an astronaut in the satellite can resolve if the diameter of her pupil is 5.00 mm and the wavelength of light is assumed to be 490 nm?
34.672 m is the approximate size of the smallest object on earth that an astronaut in the satellite can resolve.
L = satellite is orbiting the earth at an altitude of 290 × [tex]10^{3}[/tex] m
λ = wavelength of light is 4.90 × [tex]10^{-7}[/tex] m
d = diameter of her pupil is 5 × [tex]10^{-3}[/tex] m
θ = 1.22 × λ/d= y/L
So, y = 1.22× (λ/d) × L
y = 1.22× (4.90 × [tex]10^{-7}[/tex] m /5 × [tex]10^{-3}[/tex] m) × 290 × [tex]10^{3}[/tex] m
y = 34.672 m
Hence, 34.672 m is the approximate size of the smallest object on earth that an astronaut in the satellite can resolve.
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Airplane flight best illustrates
A) Archimedes' principle.
B) Pascal's principle.
C) Bernoulli's principle.
D) Boyle's law.
The Bernoulli principle is best demonstrated through aeroplane flying.
The airfoil—the technical term for an aeroplane wing—has a curved upper surface, which Bernoulli's theorem tries to explain in terms of lift. According to the theory, this curvature causes air to move across the top of the wing more quickly than it does along the flat bottom of the wing. Energy conservation and fluid motion are the foundations of Bernoulli's equation. It is frequently used to describe how aircraft fly: "Because the speed is higher there, the air pressure is higher there than it is above the wing. Bernoulli's principle suggests that the pressure on the surfaces of the wing will be lower above than below, for instance, if the air flowing past the top surface of an aircraft wing is travelling faster than the air passing past the bottom surface. An upward lifting force is produced as a result of this pressure difference.
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suppose etienne wants to calculate the velocity of the mass in the simulation, given the period, t, mass, m, and spring constant, k. why does hakim say it is not possible to use the kinematic equation v
There is currently no established method that can replicate gravity other than actual mass or acceleration.
The mass physics classroom's focal point is...
The location of the mass's center A position relative to an object or set of objects is known as the center of mass. It is the system's average location, weighted by the mass of each component. The center of mass is situated at the centroid for straightforward stiff objects with homogeneous density.
Mass simulation: what is it?
By 1800, the concept of denudation—the surface lowering of the land caused by mass waste and erosion—had been developed. It is implied by the term "planation" that denudation will continue until the land is reduced to a low plain just above the base level of erosion, which is usually the sea.
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the cessna cardinal, a single-engine light plane, has a wing area of 16.2 m2 and an aspect ratio of 7.31. assume the span efficiency factor is 0.62. if the airplane is flying at standard sea-level conditions with a velocity of 200 km/h, what is the induced drag when the total weight is 9800 n?
The cessna cardinal, a single-engine light plane, has a wing area of 16.2 m2 and an aspect ratio of 7.31 with span efficiency factor of 0.62 then the induced drag when the total weight is 9800N is 29.951N
Given wing area (A) = 16.2m^2
Aspect ratio (r) = 7.31
efficiency factor (e) = 0.62
Weight of plane (W) = 9800N
velocity of airplane (v) = 200km/h = 200x5/18 = 55.5m/s
Dynamic pressure (p) = 1/2ρv^2 where ρ is density of plane = 1.225
p = 1/2x1.225x55.5x55.5 = 1886.6
Lift coefficient Cl = W/pxA = W/1/2ρv^2A where A is the area of wing
Cl = 9800/1886.6x16.2 = 0.32
Induced drag coefficient (Cd) = Cl^2/πer^2 = 0.32x0.32/πx0.62x7.31x7.31 = 0.98x10-3
Induced drag (d) = pxAxCd = 1886.6x16.2x0.98x10-3 = 29.951N
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an electric current transports of charge in milliseconds. calculate the size of the electric current.
The size of the electric current is 155 Amperes.
Calculation:
I = Q / t
I = 93.0 C / 0.601 s
I = 155 C/s
I = 155 A
Electric current is the flow of charged particles such as electrons and ions, that travel through a conductor or space. It is measured as the net flux of charge to the surface or control volume. Electricity starts with atoms.
Atoms are made up of protons neutrons and electrons. Electricity is generated when electrons are moved from atom to atom by an external force. The flow of electrons is called current. Current refers to the flow of current in an electronic circuit and the amount of current that flows through the circuit.
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a car travels 11.8 m north and then travels 13.3 m east. what is the magnitude of the car's displacement?
The magnitude of car's displacement is 17.78 m.
Given that, distance travelled due north is 11.8 m
Distance travelled due east is 13.3 m
As it is said that the car travels north and then east, it forms the two sides of a right-angled triangle. The magnitude of third side is the magnitude of car's displacement.
From Pythagoras theorem, the expression for car's displacement can be written as,
AC² = AB² + BC²
where, AB and BC are the sides of the right triangle
AC is the displacement of the car
Making AC as subject, we have,
AC = √(AB² + BC²) = √(11.8² + 13.3²) = √(139.24 + 176.89) = 17.78 m
Thus, the magnitude of car's displacement is 17.78 m.
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You make yourself and your friend a cup of hot chocolate and add vanilla ice cream. You quickly enjoy yours, but your friend takes a long time to come, so you get to observe theirs as a science experiment.
In what direction does the heat flow? (2 points)
Describe how the kinetic energy of the hot chocolate changes once you add the ice cream. (2 points)
How does the kinetic energy of the ice cream change once you put it in the hot chocolate? (2 points)
What happens to the temperature of each substance? Be specific. (2 points)
When will the temperature of the ice cream and the hot chocolate stop changing? (2 points)
Answer:
How does the kinetic energy of the ice cream change once you put it in the hot chocolate?
Explanation: ice cream is cold when the hot chocolate is hot
Answer:
Explanation:
Heat always flows from HOT to COLD.
KE of hot chocolate decreases.
KE of ice cream increases.
Temp. of hot chocolate decreases (it cools down), temp. of ice cream increases (it warms up).
Temp. of each will stop changing when the 2 substances reach equilibrium (no more flow of heat).
you are looking down at a loop and there is a magnet below the loop with the north pole facing you. as the magnet falls away from you, which way does the induced current flow in the loop?
As the magnet falls away from you the direction of induced current flow anticlockwise in loop.
Suppose we run it above the input to the coil. It is far away so there is no flux . As the magnet descends and approaches the entrance to the coil, part of the magnetic field from the magnet passes through the top few imaginary disks of the coil. The time-varying flux induces a certain EMF. This is the initial rise in the red part of the diagram. As the magnet continues to descend and enter the coil, more of its magnetic field weaves through the imaginary disks in the coil, so as it moves, the time rate of change of the total flux increases, so the EMF rises. Note that the field lines above and below the bar magnet point in the same direction.At some point the rod reaches the center of the coil. At this point, the amount of flux added to the upper half of the coil by the small movement of the magnet equals the amount of flux removed from the lower half. Therefore, at this point the EMF is zero. This is the middle point of the diagram where the EMF crosses the horizontal axis. The descending part of the red part is only an approximation to the middle part of the coil.[tex]d X E=-\frac{dM}{dT}[/tex]
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a large aquarium of height 5.00 m is filled with fresh water to a depth of 2.00 m. one wall of the aquarium consists of thick plastic 8.00 m wide. by how much does the total force on that wall increase if th
If a sizable aquarium with a height of 5.00 m is filled wit fresh water to the a depth of 2.00 m, the total force on that wall will grow to F=4.69510 5 N.
What does the word "force" mean in science?The word "force" has a clear definition in science. It is completely fair to refer to a force of this size as either a pushing or a pull. An object cannot be "contained" by a force or "exist in" it. A force is felt by one item coming from another. A force can be any object, whether it's living or not.
What are force and an example?The word "force" refers to an outside source that leads a body to have a tendency to alter or alter its status. The body can change shape, size, and direction when force is applied to it. Using your feet to kick a ball, open and close doors, or knead dough are some examples.
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Choose the best answer to each of the following. Explain your reasoning with one or more complete sentences. What is the leading hypothesis for Venus's lack of water? (a) Venus formed closer to the Sun and accreted very little water. (b) Its water is locked away in the crust. (c) Its water molecules were broken apart, and hydrogen was lost to space
(c) Its water molecules were broken apart, and hydrogen was lost to space.
The evidence that the Venus once used to have water was the deuterium to hydrogen ratio in the atmosphere of Venus is about 150 times of earth.
Proofs are Venus must have started with oceans worth water.
The water is now escaped because when the UV rays from the sun as fallen upon the water the water molecules were broken and hydrogen went to the space.
And therefore, there is no water now present on the planet Venus.
scientist are still finding ways to discover life on the planet Venus and other planets.
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in which scenario would strict liability most likely apply? an airplane's brakes fail in freezing weather. a dishwasher fails to fully clean the dishes. a lightbulb burns out prematurely. a car's radio sometimes stops working.
The scenario "An airplane's brakes fail in freezing weather" is considered under strict liability.
Strict liability is a concept used in both civil and criminal law that holds a defendant accountable for their actions regardless of their intent at the time the action is committed.
It means that someone could be held responsible for a result that they did not intend.
In other words, regardless of criminal intent or possible negligence, a person is strictly liable simply by engaging in certain behaviours.
In business, strict liability refers to when liability is not based on negligence or intent to harm. For example, if you were the headmaster of a public school and hired a teacher with no teaching degree or experience, and that teacher made a mistake and the school was sued, you would be held completely liable.
Thus, from the given statements, the statement " an airplane's brakes fail in freezing weather." should apply for strict liability.
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In the definition of weight, W = mg, the mass m refers to an inertial mass.
True or false
For a cart moving along a track with the x-axis parallel to the track, all forces acting on the cart must be along the x-direction.
True or false
If the cart is moving on the positive x axis, the x-component of velocity must be positive.
True or False
The mass m used in the formula for weight, W = mg, refers to passive gravitational mass rather than inertial mass.
Objects accelerate due to imbalanced forces. However, not every item accelerates at the same rate in the presence of the same imbalanced force. A mass quantity called inertial mass determines the body's inertial resistance to acceleration when responding to all types of force.The gravitational force a body experiences while in the gravitational field, or g, is what determines its gravitational mass.
It is untrue that all forces acting on a cart going along a track with the x-axis perpendicular to the track must travel in the x direction. Because they might cancel each other out, the forces in the y direction.It is true that the x-component of velocity must be positive if the cart is travelling along the positive x axis.To learn more about inertial mass click here https://brainly.com/question/27750078
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A 0.039 kg bullet moving at 475 m/s strikes a stationary 5.7 kg wooden block. The bullet passes through the block and leaves with a velocity of 284 m/s. If the block was originally at rest, how fast does it move after being hit by the bullet?
use units and work out
The velocity of the block after it is hit by the bullet is 1.307 m/s.
What is velocity?Velocity is the rate of change of displacement.
To calculate the velocity of the block after it is hit by the bullet, we use the formula below.
Formula:
v = (mU-mV)/M............. Equation 1Where:
v = Final velocity of the blockU = Initial velocity of the bulletV = Final velocity of the bulletM = Mass of the blockFrom the question,
Given:
m = 0.039 kgM = 5.7 kgU = 475 m/sV = 284 m/sSubstitute these values into equation 1
v = [(0.039×475)-(0.039×284)]/5.7v = (18.525-11.076)/5.7v = 1.307 m/sHence, the velocity of the block is 1.307 m/s.
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CAN SOMEONE HELP ME WITH QUESTION d PLEASE I NEED ASAP
Answer:
Below
Explanation:
'Thermistor' is a Thermal Resistor .... the resistance of the thermistor changes with the temperature. The most common type has an increasing resistance as the temperature decreases. ( There are thermistors that have a DECREASE as temp drops) . This changing resistance will change the amount of current through the thermistor and the voltage drop across it .
a metal head of a hammer hits a nail and pushes it into a wooden board. - the force that hammer exerts on the nail - the force that nail exerts on the board a. the force that nail exerts on the hammer. b. the force that board exerts on the nail c. the force that hammer exerts on the board d. the force that board exerts on the hammer
The force experienced by the hammer and nail is the force that the hammer exerts on the nail and the force that the nail exerts on the board.
This exertion of the force in hammer and nail is due to newton's third law of motion and the conservation of momentum.
Newton's third law states that when two bodies interact, forces of equal magnitude and opposite direction act on each other. The third law is also called the law of action and reaction. This law is important in solving static equilibrium problems where all forces are balanced, but it also applies to bodies in uniform or accelerated motion.
Conservation of momentum states that the momentum remains constant within the problem region. Momentum is neither created nor destroyed, it is changed only by the action of force in the sense of Newton's laws of motion.
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an ideal gas is confined to a container at a temperature of 350 k. 1) what is the average kinetic energy of an atom of the gas?
The pendulum will temporarily come to rest when it reaches its highest position for a very brief period of time. The pendulum's potential energy is at its highest point at this instant.
What form does the energy take when the mass moves past the equilibrium position in the system?
Elastic potential energy is transformed into kinetic energy as soon as the item begins to move; at equilibrium, only kinetic energy remains.
Which point has the most potential energy?
When the most energy is stored, potential energy is at its highest. When something rises to its greatest point in the air before dropping, when a rollercoaster is about to descend, or when a rubber band is stretched as far before it breaks, are examples of this. After then, potential energy is changed into kinetic energy.
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A 49 kg girl rides on a 4.2 kg skateboard. The girl on the skateboard moves at 1.0 m/s. If the girl jumps off the skateboard backwards with a velocity of 1.6 m/s, how fast does the skateboard roll away?
A 49 kg girl rides on a 4.2 kg skateboard. The girl on the skateboard moves at 1.0 m/s. If the girl jumps off the skateboard backwards with a velocity of 1.6 m/s, the skateboard rolls away at 31.3 m/s.
What is the Law Of Conservation Of Linear Momentum?
Law of conservation of linear momentum states that the total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is
P=mv.
If we have a system of bodies, then the total momentum is the sum of the individual momentums:
P = m₁v₁ +m₂v₂
If a collision occurs and the velocities change to v', the final momentum is:
P' = m₁v₁' +m₂v₂'
Since the total momentum is conserved, then:
P = P'
m₁v₁ +m₂v₂ =m₁v₁' +m₂v₂'
A girl of m1 = 49 kg rides an m2 = 4.2 kg skateboard and the common speed is v1 = v2= 1 m/s.
The girl jumps off the skateboard backward with a speed of v1'=-1.6 m/s (negative because it's opposite to the original direction). It's required to find the final speed of the skateboard. It will be calculated by solving for v2':
v₂'= m₁v₁ +m₂v₂ - m₁v₁' / m₂
= (49 × 1) + ( 4.2 × 1 ) - ( 49× (- 1.6) / 4.2
Calculating the values,
= 31.3 m/s.
The skateboard rolls away at 31.3 m/s.
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you are trying to determine the distance to a single galaxy. the galaxy isn't particularly far away, but it also isn't very close. it has a lot of young stars. which would be the best choice for a standard candle to use for this galaxy and why?
The best choice for a standard candle to use for this galaxy is Cepheids Variable (young stars).
Astronomers can use what is known as a change in surface brightness along with the galaxy's color to calculate its distance from Earth. Most galaxies measured this way are millions of light years away. Edwin Hubble was able to show that the Andromeda Nebula is a separate galaxy from the Milky Way by using observations of Cepheid variable stars to estimate the distance to Andromeda.
According to Hubble's law, the distance to a galaxy can be calculated by dividing its receding velocity by the Hubble constant. Distances to nearby stars are determined accurately and precisely using parallax techniques. Viewing a celestial object from different observation points far away changes its position relative to more distant background stars and galaxies.
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Different masses are hung on a spring scale calibrated in Newtons.
W(weight) = Given mass in Kg X Gravitational force (9.8 N/Kg)
a. The force exerted by gravity on 1 kg = 9.8 N.
b. The force exerted by gravity on 5 kg = ______ N.
c. The force exerted by gravity on _______ kg = 98 N.
d. The force exerted by gravity on 70 kg = ________ N.
Answer:
2121 newtons
Explanation:
Different masses are hung on a spring, then the different values obtained after solving are 49 N, 10 kg, and 686 N.
What is gravity?The fundamental force of attraction operating on all matter is recognized as gravity, also spelled gravity, in mechanics. It has no impact on identifying the interior properties of common matter because it is the weakest force known to exist in nature.
The formation and growth of planets, galaxies, and the universe are all under the influence of this long-range, cosmic force, which further determines the trajectories of objects throughout the universe and the entire universe.
As per the given information in the question,
1 kg = 9.8 N
(b)
5 kg = 5 × 9.8
5 kg = 49 N
(c)
x kg = 98 N
x = 98/9.8
x = 10 kg
(d)
70 kg = 70 × 9.8
70 kg = 686 N.
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g find the net electric force that the two charges would exert on an electron placed at point on the x-axis at x = 0.200 m.express your answer with the appropriate units. enter positive value if the force is in the positive x-direction and negative value if the force is in the negative x-direction.
The net electric field on charges are -537 N/C.
The electric field is a vector magnitude, so we must add them as vectors. The electric field equation is
E = k q / r²
Where k= Coulomb constant that you are worth 8.99 * 10⁹ N m²/C², that the magnitude of the load and r = distance between the load and the test load.
Let's find the field created by each charge at the point x = 0.200 m
Charge 1
This charge is at the origin, the distance is
x₁ = 0.200 m
q₁ = 3 nC = 3 * 10^-9 C
E1 = k q₁ / x₁²
E1 = 8.99 * 10⁹ * 3* 10⁻⁹ / 0.2²
E1 = 674.25 N / C
Charge 2
This load is the point a = 0.800 m, so the distance to the test charge at 0.200 m
x₂ = 0.800 - 0.200
x₂ = 0.600 m
q₂ = -5.5 nC = -5.5 * 10-9 C
E2 = 8.99 * 10⁹ * 5.5 * 10⁻⁹ / 0.600²
E2 = 137.35 N / C
We already have the value of each field, add them vectorially, remember that if the charges are of the same sign they repel and if they are of the opposite sign they attract, the field E1 is directed to the left and the field E2 is directed to the right.
Et = -E1 + E2
Et = -674.25 + 137.25
Et = -537 N / C
The field is headed to the left.
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a 55kg ice skater is at rest on a flat skating rink. a 198n horizontal force is needed to set the skater in motion. however, after the skater is in motion, a horizontal force of 175n keeps the skater moving at a constant velocity. find the coefficients of static and kinetic friction between the skates and the ice.
The Kinetic frictional coefficient is 0.325, the given body in motion.
What is the Friction coefficient?The ratio between the normal force pressing two surfaces together and the frictional force preventing motion between the surfaces. In most cases, the Greek letter mu is used to represent it. Mu is calculated as being equal to F/N, where F stands for frictional force and N is for normal force. because units of force are used to quantify both F and N. Friction's coefficient has no dimensions. For both static and kinetic friction, the coefficient of friction has a range of values.
Calculations:
The initial frictional force is due to static frictional force=μsmg=horizontal force applies
μsmg = 198
μs = 198/55 × 9.8 = 0.367
The final frictional force is due to kinematic frictional force = μkmg = horizontal force applied 175N
μkmg = 175
μk=175/55*9.8
kinetic frictional coefficient = 0.325.
Hence, the Kinetic frictional coefficient is 0.325, the given body in motion.
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speed of 0.986 c what would be the momentum of this proton? express your answer with the appropriate units.
The momentum of the proton with speed of 0.986 c is 4.20 × 10⁸ kJ - m/s.
Momentum is defined as the product of the mass of a particle and its velocity. Momentum is a vector quantity, which means it has both magnitude and direction. Isaac Newton's second law of motion says that the time rate of change of momentum is equal to the force acting on the particle.
Calculate the momentum by using the formula:
p = (m₀v)/√(1 - v²/c²)
Substituting the values we get,
⇒ p = (1.67 × 10⁻²⁷ × 0.986 c) / √{1 - (0.986/c)²}
⇒ p = (1.67 × 10⁻²⁷ × 0.986 c) / √{1 - (0.986)²}
⇒ p = 1.404 × 10⁻²⁶ c
⇒ p = 4.20 × 10⁸ kJ - m/s
Hence, the momentum of the proton is 4.20 × 10⁸ kJ - m/s.
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Correctly identify the following formed elements. eBook Lymphocyte Neutrophil Eosinophil Platelets Monocyte Basophil Prev 1 of 17 Next >
Granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes are different kinds of white blood cells (T cells and B cells). Histamine is released by basophils to elicit an all-purpose immune response.
While battling germs and parasites, eosinophils can also cause allergic symptoms. B and T cells that function as lymphocytes protect the body from particular invaders. Monocytes remove dead cells from the body. Granulocytes, lymphocytes, and monocytes are the three primary types of white blood cells according to medical experts. All of the body's components receive nutrition and oxygen so they can continue to function. The lungs, kidneys, and digestive system use the blood to transport carbon dioxide and other waste products to be expelled from the body. Additionally, blood transports hormones throughout the body and fights infections.
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a supersonic aircraft is flying parallel to the ground. when the aircraft is directly overhead, an observer sees a rocket fired from the aircraft. 9.98 s later the observer hears the sonic boom, followed 2.3 s later by the sound of the rocket engine. what is the mach number of the aircraft? brainly
A sonic boom is a shock wave that is produced when an object moves through the atmosphere of Earth at supersonic speed and is audible to people on the ground as a loud explosion.
How does a sonic boom happen?
Sonic boom is an abrupt sound resembling thunder. It is brought on by a substance moving at a speed greater than the speed of sound, or roughly 750 miles per hour. Similar to how a ship's bow causes water waves, an airplane flying through the atmosphere continuously creates air-pressure waves as well.
Can pilots hear the boom of the sonic?
The "boom carpet" is the name of this route. Pilots don't hear sonic booms, in case you were wondering how they react to them. People inside the aircraft cannot hear the sonic boom, but they can see the pressure waves that are surrounding it. The boom carpet unfolds behind the aircraft like a ship's wake.
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Identify the shield shaped top of the stemum. View Avallable Hint(s)
O Xiphoid Process
O Manubrium
O Gladiolus
O Body
Submit Part B
Name the type of connective tissue that anchors the ribs onto the sternum. View Available Hint(s) Dense regular connective tissue Hyaline cartilage Elastic cartilage Fibrocartilage Submit Part C Which facial bones makeup the central portion of the bridge of the nose? ► View Available Hint(s)
O Lacrimal
O Maxillary
O Nasal
O Zygomatic
Submit Part D
What is the anatomical name for the facial bones known as "cheekbones"? View Available Hint(s)
O Maxillary bones
O Nasal bones
O Lacrimal bones
O Zygomatic bones
Submit MacBook Air Part E
Which facial bones fuse to form the upper jaw? View Available Hint(s)
O Zygomatic
O Maxillary
O Nasal
O Lacrimal
Submit Part F
Identify the small facial bones found in the medial wall of the orbit. View Available Hint(s) Inferior nasal concha Zygomatic Palatine Lacrimal Submit Part G Part G Which facial bones form the roof of the mouth?
O Ethmoid bone
O Zygomatic bone
O Mandible
O Maxillary bones
O Palatine bones
Submit Request Answer
a)Body b) Maxillary c) Zygomatic bones d) Maxillary e) Ethmoid bone
A pair of diamond-shaped, atypically formed bones called the zygomatics extend laterally to produce the prominence of the cheeks, a section of the lateral wall, the orbit floor, and a portion of the temporal and infratemporal fossa. The jaw and bones close to the ears, forehead, and skull are joined to the zygomatic bones, which also assist in giving shape and structure to the face. In addition to offering an attachment for jaw-moving muscles, they shield the nerves and blood vessels that pass through the face. referred to as the cheekbone. The temporal bone at the side of the head curves around to meet the maxilla (upper jawbone) in front, forming the zygomatic arch, a bridge of bones that includes the zygomatic (cheek) bone as a significant section.
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The resistance of an electric stove element at operating temperature is 11Ω.
a. If 220 V is applied across it, what is the current through the stove element?
b. How much energy does the element convert to thermal energy in 30.0 s?
c. The element is used to heat a kettle containing 1.20 kg of water. Assume that 65 percent of the heat is absorbed by the water. What is the water’s increase in temperature during the 30.0 s?
A. The current through the stove is 20 A
B. The energy converted to thermal energy is 132000 J
C. The increase in temperature during the 30 s period is 17 °C
A. How do I determine the current?
The current through the stove can be obtained as follow:
Resistance (R) = 11 ΩVoltage (V) = 220 VCurrent (I) =?Voltage (V) = Current (I) × resistance (R)
220 = Current × 11
Divide both sides by 11
Current = 220 / 11
Current = 20 A
B. How do I determine the energy?
The energy can be obtained as shown below:
Resistance (R) = 11 ΩVoltage (V) = 220 VTime (t) = 30 sEnergy (E) =?E = V²t / R
E = (220² × 30) / 11
E = 1452000 / 11
Energy = 132000 J
C. How do I determine the increase in temperature?
The increase in temperature can be obtained as follow:
Mass of water (M) = 1.20 Kg = 1.2 × 1000 = 1200 gEnergy = 132000 JPercentage absorbed = 65%Heat absorbed (Q) = 65% × 132000 = 85800 JSpecific heat capacity of water (C) = 4.184 J/gºC Increase in temperature (ΔT) =?Q = MCΔT
85800 = 1200 × 4.184 × ΔT
85800 = 5020.8 × ΔT
Divide both side by 5020.8
ΔT = 85800 / 5020.8
ΔT = 17 °C
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consider two planets in space that gravitationally attract each other. if the mass of both planets is doubled, and the distance between them is also doubled, then the forces between them is * 1 point captionless image a)one quarter b)half as much c)twice as much d)four times as much e)none of these
If the mass of both planets is doubled, and the distance between them is also doubled, then the forces between them is are twice as much.
In physics, a force is a power that can change the motion of an item. A force can purpose an object with mass to alternate its pace. Pressure also can be described intuitively as a push or a pull. A force has both value and path, making it a vector quantity.
Force is a push or a pull and it affects our daily lives because, without force, people might not be capable of opening and near stuff or lifting up their arms or legs.
Variety of Forces :
* Muscular Forces, muscular tissues feature to produce an ensuing force which is referred to as 'muscular force'.
* Frictional Forces, while an item modifications its national motion, 'frictional pressure' acts upon it.
* Carried out pressure.
* Tension force.
* Spring force.
* Gravitational pressure.
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imagine an experiment where we uniformly heat three containers, one with water, one with dry sand, one with damp sand. which one would experience the greatest increase in temperature?
Dry sand will experience the greatest increase in temperature when we uniformly heat three containers.
The reason behind is that the intermolecular force between the particles in dry sand is weakest as compared to water particles and damp sand particles. Because of weak intermolecular force, particles have certain amount of distance between each other, due to that on supplying continuous heat those particles feels the increased effect and the similar phenomenon is happened with all particles of dry sand, due to that there is a collective increase in temperature on continuously supply of heat.
Water particles and damp sand has strong intermolecular force of attraction as compared to dry sand, due to that they don't feel much experience of increased temperature.
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A certain relay draws 750 mA with 9 V applied What is the power consumption of the relay's coil? 6.75 (within three signilicant digits) For how long can an Energizer 522 V battery operate such relay? Assume baltery capacity of SUU mAA. (within thee signilicant digits)
The Energizer 522 V battery can operate such a relay for approximately 0.69 h.
The power consumption of the relay's coil is 6.75 W. The Energizer 522 V battery has a capacity of 522 mA. To calculate how long the battery can operate the relay, we need to know the current draw of the relay in mA.
Since the current draw of the relay is 750 mA, we can use the following formula:
Time (h) = Battery Capacity (mA) / Current Draw (mA)
Time (h) = 522 mA / 750 mA
Time (h) = 0.69 h
Therefore, the Energizer 522 V battery can operate such a relay for approximately 0.69 h.
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7. Which of the following is not an agent of erosion? A. glacier B. rocks C. water D. wind 8. Which of the following cannot be considered as a role of gravity in erosion? A. It moves glaciers down slope.B. It loosens the land materials, c. In mountains, it moves down large slabs of rocks. D. It acts as agents of mass wasting like landslides, fall, mudflows, and avalanches, 9. What term refers to the process wherein rocks break down into pieces? A. deposition B. erosion C. mass wasting D. weathering 10. What process of chemical weathering is involved when water reacts with one mineral to form a new mineral like feldspar into clay? A. dissolution B. hydrolysis C. oxidation D. pressure 11. What type of mechanical weathering occurs when freezing of water and repeated thawing in cracks of rocks? A. abrasion B. frost wedging C. oxidation D. solution 12. Which of the following does NOT cause chemical changes in the composition of rocks? A. abrasion B. dissolution C. hydrolysis D. oxidation 13. What chemical reaction takes place during rusting of iron? A. abrasion B. dissolution C. hydrolysisD. oxidation
7 A. glacier, 8 B It loosen the land material, 9 D Weathering, 10 B Hydrolysis 11 B Frost wedging, 12 A abrasion,13 D oxidation.
Any chemical reaction in which a water molecule breaks one or more chemical bonds is called hydrolysis (/hadrlss/; from the Ancient Greek hydro-, "water," and lysis, "to unbind"). When water is the nucleophile, the phrase is used generically to refer to substitution, elimination, and solvation processes. The cleavage of biomolecules known as biological hydrolysis occurs when a water molecule is consumed in order to cause the division of a bigger molecule into its component parts. Saccharification is the process of hydrolyzing a carbohydrate into its individual sugar molecules, as occurs when sucrose is broken down into glucose and fructose.
A condensation. reaction, in which two molecules. combine to form a bigger. one and expel. a water molecule, can be reversed. by a hydrolysis. reaction. In order to break down, hydrolysis adds water.
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