Answer:
C
Explanation:
the image formed is real but inverted and magnified
you can remember it by R I M
hope this helps
The image results when the object is located between 2f (2 focal lengths) and f (the focal point) of a convex lens will be real, inverted, and enlarged.
What is a convex lens ?An optical lens is made up of two spherical surfaces is a convex lens The lens is called a biconvex lens or simply convex lens if those surfaces are curved outwards.
Converging lens is another name for it. It's because it brings all the light rays that are parallel to the primary axis together at the focus point (F).
The image results when the object is located between 2f (2 focal lengths) and f (the focal point) of a convex lens will be real, inverted, and enlarged.
Hence, option C is correct.
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A car is sitting still what could cause the car to move
(b) A lift (elevator) in a high building transports 12 passengers, each of mass 65 kg, through a
vertical height of 150 m in a time of 64 s.
(0) Calculate the power needed to transport the passengers through this height.
power =
Explanation:
P =F * v
F = m * a = 65 kg * 9.81 ms^-2 * 12 passengers
v = d/t = 150m / 64 s
I think you can calculate and substitute this units should be watts
The power needed to transport the passengers through this height is 17.933 KW or 17933 Watts.
What is Power?Power can be defined as the rate at which work is done by an object. Power can be calculated by the formula:
P = W × t
where, P = power, w = work done, and t = time taken.
The SI unit for power is the watt (W), where 1 watt power is equal to 1 joule/second (1W = 1J/s). Because, the work done by an object is the energy transfer by the object, and power is also the rate at which energy is expended.
P = F × v
where, P = Power, F = Force, and V = velocity of the object
F = m × a = 65 kg × 9.81 ms⁻² × 12 passengers = 7651.8
v = d/t = 150m / 64 s = 2.343
P = 7651.8 × 2.343
P = 17,933.90
P = 17.933 KW
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The diagram below represents a light ray striking the boundary between air and glass. What would be the angle between this light ray and its reflected ray?
30°
60°
120°
150°
Answer:
120°
Explanation:
straight line = 180°
light ray = 30°
the reflection will be like a mirror image
30°+30° = 60°
180° - 60° = 120°
The angle of incidence and the angle of reflection are equal
The correct option for the angle between the given light ray and the reflected ray is the option;
120°
Reason:
The given parameter are;
The angle formed by the light ray and the glass surface = 30°
Required:
To find the angle between the light ray and the reflected ray
Solution:
According to the laws of reflection, the angle between the incident ray and the normal is equal to the angle made between the reflected ray and the normal
The angle made between the incident ray and the normal, [tex]\theta _i[/tex] = 90° - 30° = 60°
Therefore, according to the laws of reflection, we have;
The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = The angle between the incident ray and the normal, [tex]\theta _i[/tex] = 60°
The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = 60°
The angle between the given light ray and reflected ray, θ = [tex]\theta _i[/tex] + [tex]\theta _r[/tex]
∴ θ = 60° + 60° = 120°
The angle between the given light ray and the reflected ray, θ = 120°
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"Heat conduction to skin": Suppose 175 W of heat flows by conduction from the blood capillaries beneath the skin to the body's surface area of 1.5 m2. If the temperature difference is 0.70°C, estimate the average distance of capillaries below the skin surface.
Answer:
Explanation:
Thermal conductivity of human skin K = 21 W / m²
Formula for heat conduction
Q = KA ( θ₂ - θ₁) / d
A is surface area , θ₂ - θ₁ is temperature difference , d is thickness .
Putting the values
175 = 21 x 1.5 x .70 / d
d = .126 m
= 12.6 cm .
¿Cuál es la intensidad del campo eléctrico a una distancia de 2 m de una carga de -12μC? *
Answer:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidUna secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en caloríasad de calor produce?, expresado en calorías
if fluorine is neutral what would its atomic mass number, number of protons, number of neutrons, and number of electrons be
Answer:
Fluorine is the 9th element of the periodic table. If its Neutral... It'll have an atomic mass of 19. Also Since its neutral... Number of protons and Electrons will be the same which is 9. Now the Neutron number is the Mass number - The atomic no = 19-9 = 10Neutrons
A force is applied to a 12 kg box. The force is applied parallel to the motion of the box. Determine the force acting on the box if it moves 22 meters and increases the box’s speed from 10 m/s to 25 m/s.
Answer:
Force = 143.16 Newton
Explanation:
Given the following data;
Distance, S = 22 m
Initial velocity, U = 10 m/s
Final velocity, V = 25 m/s
Mass = 12 kg
To find the force acting on the box;
First of all, we would determine the acceleration of the box using the third equation of motion;
V² = U² + 2aS
25² = 10² + 2*a*22
625 = 100 + 44a
625 - 100 = 44a
525 = 44a
Acceleration, a = 525/44
Acceleration, a = 11.93 m/s²
Next, we find the force;
Force = mass * acceleration
Force = 12 * 11.93
Force = 143.16 Newton
What is the magnitude of the electric field strength at a point where an electron
experiences an electrostatic force of 8 x 10^ 17 N? NO LINKS.
1) 5 x 10^36 N/C
2) 0.76 N/C
3) 8 x 10^17 N/C
4) 0.002 N/C
Answer:
E = F/ q 8x10^17÷ 1.6 x 10^ - 19
Explanation:
5x 10^36N\c A is answer
What creates the energy of the Sun?
A. gravitational pull from its core
B. chemical reactions
C. nuclear fusion of hydrogen atoms
D. movement of magnetic materials in the core
Answer:
C
Explanation:
During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom.
here is an acceleration vs. time graph. what is the change in velocity between 2s and 4s?
Explanation:
From 2s, velocity increased gradually up to 4s
Since a light year is a unit of astronomical distance equal to the distance light travels in one year, which phrase best completes the sentence? The distance from the sun to Earth would be ___________.
Question 3 options:
exactly one light year
less than one light year
any number of light years
more than one light year
Answer:
less than one light year
Explanation:
earth is 0.00001581 light years away from the sun :)
After performing a long equation using the conservation of mechanical energy you get a final answer that is negative. What does this mean?
A. Because energy is scalar it means that the energy is less than 0.
B. Because energy is scalar it means that the energy was transferred somewhere else.
C. Because energy is a vector it means that the energy was destroyed in the opposite direction.
D. Because energy is scalar it means that the energy was destroyed.
Answer:
The correct option is D.
Explanation:
The energy is the capacity to do work.
There are several types of energies.
1. kinetic energy : it is due to the motion of the body.
2. Potential energy : It is due to the position or the configuration of the body.
3. Mechanical energy: The sum of the kinetic energy and the potential energy is called mechanical energy.
The energy is a scalar quantity.
According to the law of conservation of energy, the energy can not be created and cannot be destroyed, it can transformed from one form to another.
When we get the mechanical energy negative, it means the energy was destroyed in some other forms of energy.
Which of the following has greater kinetic energy?
(a). A 10 g meteor hurtling (Moving at greater speed) through the Earth’s atmosphere at 5.0 km s−1. (b). A 65 kg jogger running at 5.0 m s−1.
please help me
Which explanation best describes a wave?
A.
a disturbance that travels through a medium with a transfer of energy and matter
B.
a disturbance that travels through a medium without a transfer of energy and matter
C.
a disturbance that travels through a medium with a transfer of energy and without a transfer of matter
D.
a disturbance that travels through a medium with a transfer of matter and without a transfer of energy
E.
a disturbance that travels only in the absence of a material medium
Answer:
C. a disturbance that travels through a medium with a transfer of energy and without a transfer of matter
Explanation:
A wave is any disturbance that transfers energy from one location to the other via a substance called medium. It is important to note that a wave only conveys energy and not matter. For example, sound wave is a type of wave that carries sound energy from one place to another via mediums such as water, air etc.
Hence, according to this question, a wave can be described as a disturbance that travels through a medium with a transfer of energy and WITHOUT A TRANSFER OF MATTER.
Please Help!!!!
Your Best friend gets on a ship and travels away fast. They return 10.0 years later and I’ve only aged 4.00 years. How fast was your friend traveling? Give your answer as ex. 0.5c
Answer:
v = 0.92 c
Explanation:
Here, we will use the time dilation formula from Einstein's theory of relativity to find the speed of traveling of the friend:
[tex]t =\frac{t_o}{\sqrt{1-\frac{v^2}{c^2}}} \\\\\\\sqrt{1-\frac{v^2}{c^2}}=\frac{t_o}{t}\\\\[/tex]
where,
v = speed of traveling = ?
c = speed of light
t = time of return = 10 years
t₀ = time passed on earth = 4 years
Therefore,
[tex]\sqrt{1-\frac{v^2}{c^2}} = \frac{4\ years}{10\ years}\\\\ 1-\frac{v^2}{c^2}=(\frac{2}{5})^2\\\\\frac{v^2}{c^2} = 1-\frac{4}{25}\\\\\frac{v^2}{c^2} = \frac{21}{25}\\\\v^2 = 0.84c^2\\\\[/tex]
v = 0.92 c
Which statement is true about liquids? They are invisible.
They are always the same temperature.
They retain their shape.
They take the shape of their container.
Answer:
They take the shape of their container.
I think since they move around and fit into anything perfectly.
Three 7-ohm resistors are connected in parallel with an ideal 12-volt battery. What is the equivalent resistance of the circuit?
Answer:
Equivalent Resistance of Resistors in Parallel is
1/R = 1/r1 + 1/r2 .....
1/R = 1/7 + 1/7 + 1/7
R= 7/3
R=2.33ohms
why are the layers of the earth in the order that they are in?
Answer:
Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
Explanation:
Which characteristic does Earth share with the other
planets in our Solar System?
Select one:
A.They all have oceans.
B.They all orbit the Sun.
C.They all have rocky surfaces.
D.They all have one moon.
Answer: B) They all orbit the sun
Explanation:
An object rolls east at a steady speed of 12 m/s for 3.0 seconds. What distance did it travel?
O A. 36 m
o B. 24 m
O C. 18 m
O D. 7.0 m
Answer:
[tex]\boxed {\boxed {\sf A. \ 36 \ m}}[/tex]
Explanation:
The distance an object travels is the product of its speed and time.
[tex]d=s \times t[/tex]
The object's speed is 12 meters per second and the time is 3 seconds.
s= 12 m/s t= 3 sSubstitute the values into the formula.
[tex]d= 12 \ m/s \times 3 \ s[/tex]
Multiply. Note that the units of seconds will cancel, so we are left with meters as our units.
[tex]d= 12 \ m * 3[/tex]
[tex]d= 36 \ m[/tex]
The object travels a distance of 36 meters and choice A is correct.
You receive a severe, bleeding injury to your right toe! What circuit of the cardiovascular system is most affected?
A.Pulmonary circuit
B.·Systemic circuit
Answer: A
Explanation:
Pulmonary - is lungs
Systemic - is body system
Bronco the skydiver, whose mass is 100 kg experiences 200 N of air resistance. What is the acceleration of his fall? Show Work, Please help this is due at 11:59
Answer:
Acceleration = 2 m/s²
Explanation:
Given the following data;
Mass = 100 kg
Force = 200 N
To find the acceleration of Bronco's fall;
Mathematically, force is given by the formula;
Force = mass * acceleration
Substituting into the formula, we have;
200 = 100 * acceleration
Acceleration = 200/100
Acceleration = 2 m/s²
Therefore, the acceleration of his fall is 2 meters per seconds square.
Which of the following statements is true of the strong nuclear force?
A. It repels neutral charges
B. It holds protons and neutrons together
C. It acts over very great distances
D. It is much weaker than gravitational forces
Explanation:
it holds protons and neutrons together
Strong nuclear force holds protons and neutrons together.
What is protons?Proton is a subatomic particle with a positive electric charge.
What is neutrons?Neutrons is a subatomic particle of about the same mass as a proton but without an electric charge.
What is nuclear force?The nuclear force is a force that acts between the protons and neutrons of atoms.
What is strong nuclear force?The strong nuclear force is created between nucleons by the exchange of particles called mesons. It is stronger than the force of gravity as it binds the fundamental particles to form large particle.
Strong nuclear force is strongest force in nature. So, it is much stronger than gravitational forces. It binds the neutral charges i.e. neutron instead of repelling them. It is a short range force so it can not act over very large distances.
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Electrons made to vibrate to and fro at a few hundred thousand hertz emit radio waves. What class of waves is emitted from electron vibrations of a few million billion hertz
Answer:
this frequency is in the near UV range
Explanation:
The accelerated movement of a charge creates an electromagnetic wave, the speed of the wave is the speed of light
c = λ f
the emitted frequency is f = 10⁶ 10⁹ Hz = 10¹⁵5 hz,
light of this frequency is in the near UV range
2ZnS plus 2O2 yields 2ZnO plus SO2 what is number in each category and is it balanced or unbalanced
Answer:
2 ZnS + 3O2 ---> 2ZnO + 2 SO2
Explanation:
2 ZnS + 2O2 ---> 2ZnO + SO2
There are 2 Zn atom on the LHS and 2 Zn on the RHS. Hence the Zn is balanced on both sides of the equation.
There are two S atom on the LHS but there is only one S atom on the RHS.
Hence we will balance the S atoms
2 ZnS + 2O2 ---> 2ZnO + 2 SO2
Now the oxygen is unbalanced as there are three oxygen molecule on the RHS but only two on the LHS.
Hence, the balanced equation would be
2 ZnS + 3O2 ---> 2ZnO + 2 SO2
can you explain the three main important reason why we use machine
Answer:
HERE IS YOUR ANSWER
Explanation:
1. The machines makes pur life easier.
2. It makes us do our works faster.
3. It does all the works that are harder for us.
Hope it helps you.
Explanation:
First of all some do most of the work for us
Second, us humans are quite lazy
Third, it makes it quite easier in life
How can I become an astronaut I'm currently 13 urs old
In a certain material, a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second. The material could be
Question 14 options:
crown glass (n=1.52)
flint glass (n=1.66)
glycerol (n=1.47)
water (n=1.33)
Answer:
The Answer to question 14 is : glycerol (n=1.47)
The material should be considered as the glycerol (n=1.47).
Calculation of the material:Since
a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second.
Now the material should be
= 3*10^8 / 2.04× 10^8
= 1.47
Hence, The material should be considered as the glycerol (n=1.47).
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What object currently has the most gravitational potential energy?
A, B, C, or D
Answer:
A
Explanation:
this because
gravitational potential energy = mass x height x gravitational field strength
so let's assume mass is 2 kg and gravitational field strength is 10 N /kg
so when height is very low, take it as 3 m
gravitational potential energy= 2 x 3 x 10 = 60 j
but when height is 6m
gravitational potential energy = 2 x 6 x 10 = 120 j
so when the height is the greatest, the gravitational potential energy is the highest
so A is the heighest so it has the highest gravitational potential energy.
hope this helps
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Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.What is the purpose of step 1
Answer:
The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.
Explanation:
The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.
The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.