when forming an real image with a convex lens, the image gets as you approach the focal point. when forming a virtual image with a convex lens, the image gets as you approach the focal point.
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The size of the image formed by a convex lens depends on whether the image is real or virtual and where the object is positioned relative to the lens.
When forming a real image with a convex lens, the image gets smaller as you approach the focal point. When forming a virtual image with a convex lens, the image gets larger as you approach the focal point.
A convex lens is a type of lens that curves outward and bulges in the middle. A convex lens can create either a real or a virtual image, depending on where the object is positioned relative to the lens and where the observer is positioned. When forming a real image with a convex lens, the image gets smaller as you approach the focal point. This is because the light rays converge at the focal point, producing a sharp and smaller image. When forming a virtual image with a convex lens, the image gets larger as you approach the focal point. This is because the light rays diverge from the focal point, creating a virtual image that appears to be larger than the object.
In conclusion, the size of the image formed by a convex lens depends on whether the image is real or virtual and where the object is positioned relative to the lens.
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If you have a spaceship that can go 20% of the speed of light, how long would it take to travel 200 light-years?
Answers
Answer:
1498962290
Explanation:
When you hold your cardboard square between the lights source and the wall what do you observe
Answers
When you hold your cardboard square between the lights source and the wall you observe a shadow.
Does light penetrate a cardboard?We know that light is a source of energy. Light travels in straight lines and this is called the rectilinear propagation of light. Having known that light travels along a straight path, we know that light would pass through the cardboard which is not too thick.
This cardboard is now able to scatter the light waves. We would then see a shadow at the wall. This shadow would have two regions; the region of complete darkness called umbra and the region of partial darkness called penumbra.
Thus, when you hold your cardboard square between the lights source and the wall you observe a shadow.
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5) A rocket accelerates straight up from the ground at 22m / (s ^ 2) After rising for 5.0 s a piece of the rocket breaks of and falls back to earth. How fast does the piece hit the ground?
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The final velocity of the rocket when it hits the ground is 71 m/s.
What is the final speed of the rocket?The final speed of the rocket will help us to determine how fast it is falling when it hits the ground.
Apply the following kinematic equation to determine the final velocity of the rocket
v = u + gt
where;
v is the final velocity of the rocketu is the initial velocity of the rocketg is acceleration due to gravityt is time of motionv = 22 m/s + (9.8 m/s²) x (5 s)
v = 22 m/s + 49 m/s
v = 71 m/s
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Human centrifuges are often used to simulate different acceleration levels for pilots. When aerospace physiologists say that a pilot is pulling 9g’s, they mean that the resultant normal force on the pilot from the bottom of the seat is nine times the pilot's weight. The centrifuge starts from rest and has a constant angular acceleration of 1. 5 rpm per second until the pilot is pulling 9g’s, and then continues with a constant angular velocity
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In a human centrifuge, the resultant normal force on the pilot from the bottom of the seat is nine times the pilot's weight when they pull 9g. The centrifuge has a constant angular acceleration of 1.5 rpm per second until the pilot pulls 9g. The centrifuge then continues with a constant angular velocity.
The question explains that when the aerospace physiologists state that the pilot is pulling 9g, it means that the normal force that acts on the pilot is nine times the pilot's weight. When using a human centrifuge, the centrifuge begins at rest and has a constant angular acceleration of 1.5 rpm per second until the pilot pulls 9g.
After that, the centrifuge maintains a constant angular velocity of 1.5 rpm. The resultant normal force on the pilot from the bottom of the seat is nine times the pilot's weight when they pull 9g. In human centrifuges, 9g's of force are produced on pilots, which aerospace physiologists calculate as the resultant normal force on the pilot from the bottom of the seat.
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What are the 4 types of attacks in a software?.
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Malware, password, phishing, and SQL injection assaults are the several categories of cyber-attacks.
What exactly are assaults, and what different kinds are there?Network assaults primarily fall into two categories: passive and aggressive. In passive network assaults, malevolent actors observe networks, spy on users, and collect personal information without making any changes. Modifying, encrypting, or corrupting data are all aspects of active network assaults.
What do computer assaults entail?An effort to take down computers, steal data, or utilize a computer system that has been compromised to launch subsequent assaults is known as a cyber attack. Malware, phishing, ransomware, man-in-the-middle attacks, and other cyberattacks are launched by cybercriminals using a variety of techniques.
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The tungsten filament of a certain 100-W lightbulb radiates 2.00W of light. (The other 98W is carried away by convection and conduction.) The filament has a surface area of 0.250 mm²} and an emissivity of 0.950 . Find the filament's temperature. (The melting point of tungsten is 3683K .)
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The filament's temperature is approximately 118.91 Kelvin.To find the filament's temperature, we can use the Stefan-Boltzmann law, which states that the power radiated by an object is proportional to the fourth power of its temperature.
The equation for the power radiated is P = σ * ε * A * T^4, where P is the power radiated, σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m^2K^4), ε is the emissivity, A is the surface area, and T is the temperature in Kelvin.
Plugging in the given values, we have:
2.00 W = (5.67 x 10^-8 W/m^2K^4) * 0.950 * (0.250 x 10^-6 m^2) * T^4
Simplifying the equation, we find:
T^4 = (2.00 W) / [(5.67 x 10^-8 W/m^2K^4) * 0.950 * (0.250 x 10^-6 m^2)]
T^4 ≈ 11406503.96 K^4
Taking the fourth root of both sides, we get:
T ≈ 118.91 K
Therefore, the filament's temperature is approximately 118.91 Kelvin.
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An NaCl solution is prepared by dissolving 20.0 g NaCl in 150.0 g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of water at 25°C is 23.56 torr? a.0.9304 torr
b.0.4746 torr c.21.77 torr d.0.8950 torr e.22.63 torr
Answers
According to the statement, the vapor pressure of the NaCl solution is 22.63 torr.
To calculate the vapor pressure of the NaCl solution, we need to first calculate the mole fraction of water in the solution:
moles of water = mass of water / molar mass of water
moles of water = 150.0 g / 18.015 g/mol = 8.32 mol
moles of NaCl = mass of NaCl / molar mass of NaCl
moles of NaCl = 20.0 g / 58.44 g/mol = 0.342 mol
total moles = moles of water + moles of NaCl = 8.32 mol + 0.342 mol = 8.662 mol
X(water) = moles of water / total moles = 8.32 mol / 8.662 mol = 0.9603
Next, we can use Raoult's law to calculate the vapor pressure of the solution:
P = X(water) * P°(water)
Where P°(water) is the vapor pressure of pure water, which is given as 23.56 torr.
P = 0.9603 * 23.56 torr = 22.63 torr
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A parallel plate capacitor is made out of two plates, each 1.0 m2 that are 0.02 m apart. The voltage between the plates is 1000 V. Which change will double the electric field between the plates?
a) Bring the plates so that they are 0.01 m apart.
b) None of the changes will double the electric field
c) Increase the voltage across the plates to 1500 V
d) Make both plates 2.0 m2
e) Separate the plates to 0.04 m
Answers
The change will double the electric field between the plates is (a) Bring the plates so that they are 0.01 m apart.
The electric field between the plates of a parallel plate capacitor is given by E = V/d, where V is the voltage between the plates and d is the distance between them.
a) If the plates are brought closer together to a distance of 0.01 m, the electric field between them will double. The new electric field will be E = (1000 V)/(0.01 m) = 100,000 V/m.
b) This statement is incorrect. Changing the distance between the plates or the area of the plates will affect the electric field, but not necessarily double it.
c) Increasing the voltage across the plates to 1500 V will not double the electric field. The new electric field will be E = (1500 V)/(0.02 m) = 75,000 V/m.
d) Increasing the area of the plates will not double the electric field. The new electric field will be E = (1000 V)/(0.02 m) = 50,000 V/m, which is half the original electric field.
e) Increasing the distance between the plates to 0.04 m will not double the electric field. The new electric field will be E = (1000 V)/(0.04 m) = 25,000 V/m, which is one-fourth the original electric field.
Therefore, the correct answer is (a) Bring the plates so that they are 0.01 m apart.
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In a computer, the __________________________ chips are magnetic.
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at which lettered point or points is the object speeding up? check all that apply. at which lettered point or points is the object speeding up?check all that apply. aa bb cc none submitrequest answer part b at which lettered point or points is the object slowing down? check all that apply.
Answers
The object is speeding up at point D and next the speed picks up at point C.
How to check the speed of the object?We have a time-position graph in front of us with a few points marked on it that we ought to investigate. The location where the curve's steepest slope is located is where the object is going the fastest.The point is D in this instance.Keep in mind that the graph changes to the right; therefore, if the right side is higher than the left side at any point, the item is traveling to the left (negative x-axis) at that precise moment. In this case, the points are C, D, and E.The item accelerates when the curve's curvature changes and the slope rises; for instance, from B onwards, the acceleration increases.Next, the speed picks up at point C. The inverse of what we just said is true: if the slope declines, the object slows down.In this instance, it is clear that the slope steepens after A and after E.When is the object reversing?It's simple to understand that the item moves to the right (positive x-axis) until it reaches point B, at which point it flips around.To learn more about the speed of an object, refer
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As light shines from air to water, the index of refraction is 1.02 and the angle of
incidence is 38.0 °. What is the light's angle of refraction?
29.8°
32.5°
37.1°
39.8°
Answers
Answer:
37.1°
Explanation:
Light with a photon energy of 3 ev impinges on the surface of a material with work function 0.6 ev to eject electrons. what is the kinetic energy of the outgoing electrons
Answers
Answer:
KE = incident energy - work function
The maximum KE will be (3 - .6) eV = 2.4 eV
A 1 kg box is sitting on a flat horizontal surface that has a coefficient of static friction value of 0.8. What answer best states the minimum force required to move the box in the horizontal direction?
A. >-9.8N
B. >9.8N
C. >7.84N
D. >9N
Answers
The normal force felt by the box has magnitude
F[normal] = (1 kg) g = 9.8 N
so that the maximum magnitude of static friction is
F[s. friction] = 0.8 F[normal] = 7.84 N
In order to get the box to move, (C) a minimum force of 7.84 N is required.
What two things does the sun send to the Earth that allows life to flourish here?
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Answer:
Nothing is more important to us on Earth than the Sun. Without the Sun's heat and light, the Earth would be a lifeless ball of ice-coated rock. The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.Because of Earth's ideal distance from the Sun, it receives the perfect amount of heat and light to allow life to be created and to support it.Explanation:
Answer:
Earth receives the perfect amount of heat and light that allow life to flourish
i need some help plz!
Answers
calculate the time taken to raise the temperature of 1.5 kg of water in a kettle from 15°C to 100°C given that specific heat capacity of water is 4200 J/kg/K and the heater is rated 250V , 2kW
Answers
Answer:
270 s or 4.5 min
Explanation:
First find the amount of heat needed:
q = mCΔT
q = (1.5 kg) (4200 J/kg/K) (100 − 15) K
q = 535,500 J
q = 535.5 kJ
Power is energy per time.
P = E / t
2 kW = 535.5 kJ / t
t = 270 s
What is the net force on a bathroom scale when a 110 pound person stands on it? How do you know?
Answers
List out of how animals and plants can cause weathering.
Plants
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PLEASE HURRY!!!
A car accelerates from 15 km/hr to 60 km/hr in 30 seconds what is the acceleration?
Answers
Acceleration = (change in speed)/(time)
Change in speed = (60-15) = 45 km/hr
Time for the change = 30 sec
Acceleration = 1.5 km/hr-sec
As you walk around the ASU Campus IN THE SHADE, the air is quite warm this time of year. Exactly what heats the air you feel next to Earth's surface? Indirect solar radiation Redirected solar radiatio
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The air you feel next to Earth's surface in the shade is heated by two main factors: indirect solar radiation and redirected solar radiation.
Indirect solar radiation refers to the process by which sunlight is absorbed by the Earth's surface and then re-emitted as heat. When the sun's rays reach the Earth, some of the energy is absorbed by buildings, pavement, and other objects. As these objects heat up, they release the absorbed energy as heat, which warms the surrounding air. This is why the air feels warm when you walk around the ASU Campus in the shade.
Redirected solar radiation also plays a role in heating the air near the Earth's surface. This occurs when sunlight is scattered or reflected by the atmosphere, clouds, or nearby objects, and then reaches the shaded areas. The redirected solar radiation contributes to the overall heating of the air, making it feel warm.
In conclusion, the air you feel next to Earth's surface in the shade is heated by indirect solar radiation, as the absorbed energy from the sun is released as heat, and redirected solar radiation, as sunlight is scattered or reflected and contributes to the warming of the air.
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A student is using a sound machine to produce the sound waves presented in the data table below. How could the student manipulate the sounds to make them match in pitch but make sound wave #1 louder than sound wave #2?
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Answer: Make the frequency higher for number 1 and have the same amplitude.
Explanation: Wavelength and frequency are directly related so if you change one of those then you can't keep the other one the same. You would need to raise the frequency which would make 1 louder and keep amplitude the same for both so that 1 is louder.
To make the sounds match in pitch while making sound wave 1 louder than sound wave 2 : Increase the frequency for wave #1 while setting their amplitudes at the same value
The wavelength of a sound wave is inversely proportional to its frequency therefore when the frequency of wave 1 is increased its wavelength decreases with equal proportion.
Since the increase in frequency results to a decrease in wavelength. therefore to make wave 1 louder, both waves we will have to set the amplitude values of the waves at the same amplitude.
Hence we can conclude that to make the sounds match in pitch while making sound wave 1 louder than sound wave 2 ; Increase the frequency for wave #1 while setting their amplitudes at the same value.
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a phosphorus atom needs to gain ---electrons to achieve a full octet
Answers
Answer:
Three (3).
Explanation:
The octet rule is a rule in chemistry that states that, chemical elements would either gain or loss electrons in their outermost shell in order to attain a stable electronic configuration i.e having eight (8) valence electrons in their outermost shell such as chemical elements found in group 8 (2-8-8) known as noble gas.
A phosphorus atom needs to gain three (3) electrons to achieve a full octet because the atomic number of phosphorus is 15 and as such it has the electronic configuration of 2-8-5 and needs three electron in order to become a stable element.
When a wind-up toy is set in motion, elastic potential energy that was stored in a compressed spring is converted into the __________ of the toy’s moving parts
Answers
Answer:When a wind-up toy is set in motion, elastic potential energy that was stored in a compressed spring is converted into the kinetic energy of the toy's moving parts.
Explanation:
if a test point is marked 5 volts and a sedond test point is marked -3.3 volts. what voltage would you expect to read between the two points if the refernece lead is on the lowest voltage
Answers
The 5-volt reading we can expect between the two test points if the reference lead is on the lowest voltage.
The given data is as follows:
The first test marked voltage = 5 volts
The second test marked voltage = -3.3 volts
Let us assume that the two test points are there is a conductive track between them, the voltage between the two points can be calculated using the voltage difference between the two test points.
The voltage difference between the two test points is calculated as:
5 volts - (-3.3 volts) = 8.3 volts
If the reference lead is on the lowest voltage, It means that the negative side of the voltmeter is attached to the test point with the lower voltage which is -3.3 volts.
The voltage difference between the two test points is
8.3 volts - 3.3 volts = 5 volts
Therefore we can conclude that the 5-volt reading we can expect between the two test points.
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a car whose initial speed is 30 seconds m / s slows uniformly to a stop in 5.00 seconds what was the cars displacement
Answers
Answer:
60
Explanation:
What factors affect an objects kinetic energy?
Answers
Answer:
friction
air drag
every thing that opposes the motion affects kinetic energy
Explanation:
kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest
potential energy ∝ 1/(kinetic energy)
as kinetic energy increases potential energy decreases
A parallel-plate capacitor has square plates that are 7.40 cm on each side and 3.20 mm apart. The space between the plates is completely filled with two square slabs of dielectric, each 7.40 cm on a side and 1.60 mm thick. One slab is Pyrex glass and the other slab is polystyrene. If the potential difference between the plates is 84.0 V, find how much electrical energy (in nJ) can be stored in this capacitor.
Answers
Answer:
The energy that can be stored in the capacitor is 239 nJ
Explanation:
We first calculate the capacitance of each material. Let C₁ be the capacitance of pyrex glass and C₂ be the capacitance of polystyrene.
C₁ = κ₁ε₀A/d where κ₁ = dielectric constant of pyrex glass = 5, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of pyrex slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m
C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 5 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 2424.2252/1.60 × 10⁻¹¹ F = 1515.14 × 10⁻¹¹ F = 15.2 × 10⁻⁹ F = 15.2 nF
C₂ = κ₂ε₀A/d where κ₂ = dielectric constant of polystyrene = 3, A = area of plates = L² where L = length of square plate = 7.40 cm = 7.40 × 10⁻² m and d = thickness of polystyrene slab = 1.60 mm = 1.60 × 10⁻³ m and ε₀ = permittivity of free space = 8.854 × 10⁻¹² F/m
C₁ = κ₁ε₀A/d = κ₁ε₀L²/d = 3 × 8.854 × 10⁻¹² F/m × (7.40 × 10⁻² m)²/1.60 × 10⁻³ m = 1454.5351/1.60 × 10⁻¹¹ F = 909.08 × 10⁻¹¹ F = 9.09 × 10⁻⁹ F = 9.09 nF
Since the capacitors are in series, we find their effective capacitance C from
1/C = 1/C₁ + 1/C₂
C = C₁C₂/(C₁ + C₂)
= 15.2 × 10⁻⁹ F × 9.09 × 10⁻⁹ F/(15.2 × 10⁻⁹ F + 9.09 × 10⁻⁹ F)
= 138.168 × 10⁻¹⁸/24.29 × 10⁻⁹ F
= 5.69 × 10⁻⁹ F
The amount of electrical energy stored in a capacitor is given by W = 1/2CV² where C = capacitance and v = voltage applied. Now C = 5.69 × 10⁻⁹ F and V = 84.0 V for this capacitor
So W = 1/2 × 5.69 × 10⁻⁹ F × 84.0 V
= 238.98 × 10⁻⁹ J
≅ 239 × 10⁻⁹ J
= 239 nJ
So the energy that can be stored in the capacitor is 239 nJ
a 1500 kg car accelerates from rest to 75 km/hr in 45 seconds. how much power is supplied by the engine to acclerate the car
Answers
The engine provides power to accelerate the car at a rate of 75 * 1,000 / 60 = 7500 / 6 = 1250 metric tonnes / sec (power = m* v / t).
What does "accelerate swiftly" mean?Things move more quickly when their rate, process, or other characteristics accelerate.It gets faster if the rate of anything accelerates or something accelerates it. The pace of growth will increase to 2.9% the following year.
Whatever happens when you speed up excessively?Your transmission will deteriorate if you drive quicker since your motor will use more gasoline or diesel every mile. Furthermore, going so swiftly puts additional strain on your engine's tiny moving parts, which could hasten their wear-out.
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read the vernier caliper properly please please
Answers
Know vernier caliper to analysis this image.
What is vernier caliper?
A tool for measuring linear dimensions Utilizing the measuring jaws, it is also used to determine the diameter of a sphere.
What is contained in the vernier caliper?
A large vernier caliper used to measure interior building dimensions.
The smallest reading on the vernier caliper's main scale is equal to its least count, which is equal to 1 mm divided by 10 divisions, or 0.1 mm. Length = (VSR * LC) + MSR is used to calculate the length of the object. MSR: the principal scale reading.
Along the vernier calliper's body is a substantial scale. Depending on how it is being used, the main scale's reading may be in centimeters or millimeters. According to SI units, 1 mm is the smallest main scale division.
Therefore, 1 mm is the smallest main scale division.
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How many straight edges does a cube have
Answers
Explanation: it's a cube
Answer:
12
Explanation: