Optical illusions occur because our brain is trying to interpret what we see and make sense of the world around us. Optical illusions simply trick our brains into seeing things which may or may not be real.
An erect object is 50 cm from a concave mirror of radius 60 cm. In the situation above, the object is moved to a new position, such that the new lateral magnification is 2.5. The new object distance, in cm, is closest to:
For an erect object is 50 cm from a concave mirror of radius 60 cm. In the situation above, the object is moved to a new position, the new object distance is mathematically given as
u = -18cm
What is the new object distance?
Generally, the equation for magnification is mathematically given as
1/f = 1/v +1/u
therefore,
-1/30 = 1/v + 1/u
v = -2.5u
Hence,
-1/30 = -1/2.5u + 1/u
-1/30 = (3/5)u
u = -18
In conclusion, the new object distance is
u = -18cm
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At one instant, the electric and magnetic fields at one point of an electromagnetic wave are.
At one instant, the electric and magnetic fields at one point of an electromagnetic wave are perpendicular to each other.
What is an electromagnetic wave?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.There are seven types of electromagnetic waves which are arranged in order of their increasing wavelength with radio waves having highest wavelength.
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Visible light has a range of wavelengths from about 400-750 nm. Which of these wavelengths is
most likely seen as the color red?
Answer:
600-750
Explanation:
The red color in the visible region lies in the wavelength of 600 – 750 nm. The visible light spectrum is the fraction of the spectrum that is visible to humans.
What is wavelength ?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometers, and other units since it is a distance measurement.
The portion of the spectrum visible to the human light is known as the visible light Spectrum.
Visible light has a range of wavelengths from about 400-750 nm. The red color in the visible region lies in the wavelength of 600 – 750 nm.
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Diagram of simple cell and dry cell
Answer:
Please see the file attached
A body is uniformly accelerated from rest to a final velocity of 100m/s in 10 seconds.Calculate the distance covered
Answer:
Solution s =ut + ½ at 2 = 0×10 + ½ × 10×10 2 = 1000/2=500 m
Explanation:
The body is accelerating from stationary to a velocity of 100 m/s within 10 seconds. Thus, the distance covered is 500 m.
What is acceleration?Acceleration of a moving body is the rate of change in its velocity. Acceleration is a vector quantity having both magnitude and direction. The change in magnitude or direction or both in velocity causes an acceleration in the moving body.
The relation between distance with the velocity, acceleration and time is given as :
s = ut + 1/2 at²
The initial velocity u = 0 here
v = 100 m/s
t = 10 seconds.
acceleration = 100 /10 = 10 m/s²
Then the distance covered is calculated as follows:
s = 1/2 at²
= 1/2 10 m/s²× 10²
= 500 m
Therefore, the distance covered by the body is 500 m.
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Explore the Sun-Earth-Moon option in the Model Simulation (second option). Explain the conditions necessary for an astronomical apocalypse.
The conditions necessary for an astronomical apocalypse are the shifting of earth from its orbit and collision of big star with earth.
Conditions necessary for happening of an astronomical apocalypseThe apocalypse event occurs due to climatic, nuclear war, plague or virus, zombie apocalypse or alien invasion but astronomical apocalypse occurs due to the shifting of earth from its orbit and collision of big star with earth.
So we can conclude that the conditions necessary for an astronomical apocalypse are the shifting of earth from its orbit and collision of big star with earth.
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.
A bowling ball has a mass of 3 kg & is moving at a speed of 10 m/s.
What is its kinetic energy?
Answer:
150 j
Explanation:
K.E. = 1/2 m v ^2
= 1/2 * 3 * 10^2 = 150 j
What is the energy of a single photon of visible light with a wavelength of 500.0 nm? 1 nm=10^−9 m
1. 3.97×10^−19 J
2. 84×10^14 J
2. 02×10^18 J
4. 95×10^−19 J
Answer:
3.97×10^−19 J
From the planks equation
E=hv
V= c/ wave length
V= 3×10^8/500×10^-9
=6×10^14
E= hv
6.63×10^-34×6×10^14
= 3.97×10^−19 J
Explanation:
g Two point charges -6 C and -8 C charge are 12 cm apart. What is the magnitude of the electric field at a point half-way between the two charges
Explanation:
q1 = -6
q2 = -8
d^2 = (6/100)^2 = 0.0036
k = 1/4*(pi*E) where E js the permittivity of free space
F = (k*q1*q2)/(d^2)
Substitute your values into this equation and solve
a material used by living things for growth and other life functions is a?
Answer:
I believe it wouled be Nutrients
Explanation:
hope this helps if not please let me know
Which graph shows an object with constant acceleration?
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 10, and velocity in meters per second on the y axis, numbered 0 to 50. A line starts at the origin and goes to (4, 40), then a line from (4, 40) to (9, 40) and a line from (9, 40) to (10, 0).
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, and velocity in meters per second on the y axis, numbered 0 to 10. A line starts at (0, 10) and ends at (5, 0).
A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 35. A curved line starts at the origin and arcs up to (4.3, 35).
The graph in the question that represents an object with constant acceleration is : Graph A
Description of constant accelerationAcceleration is the change in velocity with time. For graph A the acceleration remained constant as the velocity of the object did not change with the change in time. As the time changes from 4 to 9 seconds the velocity of the object remained at 40 before decelerating to 0. This shows that the acceleration of the object was constant.
Hence we can conclude that The graph that shows an object with constant acceleration is : Graph A
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Uranus and Neptune are called “ice giants” because they experience very low temperatures. This is due to the fact that these two planets are very far from the
Answer:
Sun :)
Explanation:
Uranus and neptune are the planets farthest from the sun (a heat source). :)
Have an amazing day!!
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Hello people ~
On charging by conduction, mass of a
body may
(a) increase
(b) decreases
(c) increase or decrease
(d) None of these
increase or decrease
body gains mass when gets negative charge/electronsbody losses mass when gets positive charge/losses electrons
Thus the mass may increase and decrease due to conduction || varies
A student measures the voltage and current between two points in an electrical circuit. If the voltage is 220 V and the current is 1.2 A, what is the resistance, according to Ohm's law?
A. 2190
B. 2640
C. 1830
D. 0.0050
Answer:
Your answer is C
Explanation:
V=IxR
220 divide by 1.2=183.0
The answer was probably a type error so it should be C
Pick the right answer
Question 7 of 10
Which of the following phrases best describes the term scientific model?
A. A simplified representation used to explain or make predictions
about something
B. The application of scientific knowledge to make predictions about
an object, system, or process
C. A physical copy of a scientific object, system, or process
Answer:
my answer to that question was c
Explanation:
Consider the following statements.
A. Heat flows from an object with higher
thermal energy to one with lower thermal energy;
B. Heat flows from an object at higher tem-
perature to an object at lower temperature;
C. Heat flows from an object in liquid state
to an object in solid state.
Which statements are true?
Answer:The heat flows from an object at a higher temperature to the object at a lower temperature. Thus the option A is correct.
Explanation:What is heat flow?
The flow of heat is the transfer of heat that concerns its generation, use and conversion, and exchange.The heat flow follows the laws of the thermodynamics. Heat will flow from the body that is at a higher temperature and will move towards a body of a lower temperature. Thereby maintaining an equilibrium state. As energy is needed to warm or heat up the cold body there is an exchange of energy that takes place.
Do you think there could be another period of time when so many brilliant discoveries are made in such a span of time? Why or Why not?
There won't be another period where many brilliant discoveries are made in such a span of time because of the high degree of advancement already.
What is Technology?Tgis is defined as the application of scientific knowledge for practical purposes.
We have advanced technological advancement which is why there won't be many discoveries in such time span.
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write different Betweens
Three point starter and four point starter~
Ty ~
The most significant difference between the three point and the four-point starter is that in three-point starter the no voltage coil (NVC) is connected in series with the field winding whereas in four-point starter the NVC is directly connected to the supply voltage.
☆...hope this helps...☆
_♥︎_mashi_♥︎_
What is the volume of one rubber ball? round to the nearest hundredth of a centimeter. cm3 if the price of the rubber needed to produce a ball is $0.0045/cm3, what is the cost of producing one ball? round to the nearest cent. $ if the company sells a ball for $0.50, how much profit will it make on each ball? $
The volume of one rubber ball and the cost of producing one ball and the profit will it make on each ball will be 20.58 cm³, $0.09261, and $0.40739 respectively.
What exactly is geometry?It is concerned with the geometry, region, and density of various 2D and 3D shapes.
The given data in the problem is;
r is the Rubber balls = 1.7 cm
V is the volume
C is the cost of production
P is the profit
The volume of the rubber ball is found as;
[tex]\rm v= \frac{4}{3} \pi r^3 \\\\ \rm v= \frac{4}{3} \times 3.14 (4.913)^3 \\\\ \rm v= 20.58 cm^3[/tex]
If the price of the rubber required to make a ball is $0.0045/cm3, the ball's production cost will be $0.0045/cm3.
The cost of a ball is the multiplication of the cost of one ball and the selling price of the ball;
C = 0.0045 x 20.58
C = $0.09261
P is the profit gained and profit is the subtraction of the selling price and cost price.
P = S.P.-C.P.
P=0.5 - 0.09261
P = $0.40739
Hence the volume of one rubber ball and the cost of producing one ball and the profit will it make on each ball will be 20.58 cm³, $0.09261, and $0.40739 respectively.
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Answer:
1: C
2: C
3: A
Explanation: just did it
Net force of on a vehicle that is accelerating at a rate of one. 5 M/S squared is 1999 N what is the mass of the vehicle to the nearest kilogram
a fan rotate with a speed of 450rev/min after switch off it comes to rest in 10 second assuming constant angular acceleration ,calculate the number of revolution made by it before coming to rest
Here; f = 450 rev/ min = 450/60 rev/s
f. = 15/2 rev/s
Therefore the angular velocity w. = 2π f•
= 15π rad / sec at t= 10s, w = 0
Therefore Angular acceleration
a=w-w./t
= w + 1/2 at^2
= 15π * 10 - 1/2 (3π/2) 10^2
= 150-75m = 75π rad
Therefore No. of revolution = •/2π = 75/ 2π
= 37.5
1. A woman shuts her summer cottage up in September and returns to June. No one has entered the cottage in the meantime
Explain what she is likely to find, in terms of the second law of thermodynamics.
The hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
What is second law of thermodynamics?The second law of thermodynamics states that, hot things always cool unless you do something to stop them. Or the total entropy of an isolated system can never decrease.
In other words, not all heat energy can be converted into work in a cyclic process.
Therefore, we can conclude that when the woman returns, the hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).
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A wooden block of a mass of 2.0kg is 20cm thick by 10cm wide by 30cm tall.
calculate the minimum and maximum pressure this block could exert on the surface ?
Answer:
See below ↓↓
Explanation:
Formula
Pressure = Force/AreaForce
It will be constant in both cases as mass remains the samF = mg = 2 x 10 = 20 NCase (i) : Maximum Pressure
Area has to be minimumA = 10 x 20 = 200 cm² ≅ 0.02 m²P = F/A = 20/2 x 10⁻² = 1000 PaCase (ii) : Minimum Pressure
Area has to be maximumA = 30 x 20 = 600 cm² ≅ 0.06 m²P = F/A = 20/6 x 10⁻² = 3.33 x 10² = 333 PaSecond Exercise: The circuit breaker in a kitchen (6.5 points) The electrical installation in a kitchen is fed by a sinusoidal alternating voltage of effective value U = 220 V. This installation includes the following electrical appliances: A refrigerator; A washing machine; An electric water heater (which can be considered as a resistor) of power P = 1540 W; An incandescent lamp carrying the following indications (220 V, 100 W). . 1) These electrical appliances are connected in parallel. Why? 226
Answer:
can you clear more I don't understand
The downward motion of an elevator is controlled by a cable that unwinds from a cylinder of radius 0.20 m. what is he angular velocity of the cylinder when the downward speed of the elevator is 1.2 m/s
The angular velcoity of this cylinder when the downward speed of the elevator is 1.2 m/s would be 6 rad/s.
Given the following data:
Radius of cylinder = 0.20 meter.
Linear velocity = 1.2 m/s.
What is angular velocity?Angular velocity can be defined as the rate of change of angular displacement of an object with respect to time. Thus, it is a measure of how fast and quickly an object revolves or rotates relative to another point or how its angular position changes with respect to time.
The formula for angular velcoity.Mathematically, angular velcoity is given by this formula:
[tex]V =r\omega\\\\\omega =\frac{V}{r}[/tex]
Substituting the given parameters into the formula, we have;
[tex]\omega = \frac{1.2}{0.2}[/tex]
Angular velocity = 6 rad/s.
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How much heat does it take to melt a 0.234 kg ice cube at its melting point?
Answer:
Q = M kg* 3.33E5 J / kg = .234 * 3.33E5 = 7.79E4 Joules
As a check (using 80 cal/gm as latent heat of fusion for water)
234 g * 80 cal/gm = 18720 cal
1 cal = 4.19 J
18720 cal * 4.19 J / cal = 7.7E4 J agrees with value found above
Most newer homes are built with a circuit breaker that can
handle a maximum of 200 A of current. If a home is using
the maximum amount of current possible, which is flowing
every 2 seconds, how many coulombs of charge are flowing
into the house? Explain.
The coulombs of charge which are flowing into the house is 400 coulombs.
What is Electric charge?This is the physical property of matter that causes it to experience a force when placed in an electromagnetic field and its unit is Coulomb.
Electric charge(Q) = It where I is current and t is time
Q = It
= 200A × 2s
= 400 coulombs
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What is the angular speed, in rad/s, of a flywheel turning at 813. 0 rpm?.
Answer:
The angular speed will be 85.13 rad/sec
Explanation:
What is the wasted energy in each of the energy transfers?
a) clockwork toy
b) boy kicking a football
c) boiling kettle on a gas ring
d) person walking upstairs
Answer:
a person walking upstairs is a wasted energy
