Answer:
The correct option is;
C. Computers involve matter and energy
Explanation:
The development of computers have been made by advancement and changes in the material components from which a computer is made such as the following;
a) The core material for the 1st generation of computers was vacuum tubes required for their operation
b) The 2nd generation of computers had the vacuum tubes replaced with transistors
c) The 3rd generation of computers worked with integrated circuits
d) The 4th generation which is the present day generation of computers make use of the microprocessor which consists of several thousand integrated circuits located in one silicon chip
As such the development of computers involves discovering new methods of suitable and applicable material usage
The properties of these components are naturally studied by physicists and the the future generation of computers that represent a quantum leap is more likely based on improvement in a combination of material and energy usage which are the main core areas of the study of physics
The physicist is as observed, one of the most, important member of a computer design and manufacturing team.
Solve the given parallel circuit by computing the desired quantities. I1 = amperes I2 = amperes I3 = amperes P1 = watts P2 = watts P3 = watts total current = amperes total power = watts
Answer:
1. Current 1 (I1) is 2 A.
2. Current 2 (I2) is 4 A.
3. Current 3 (I3) is 1.3 A.
4. Power 1 (P1) is 48 W.
5. Power 2 (P2) is 96W.
6. Power 3 (P3) is 31.2 W.
7. Total current is 7.3 A.
8. Total power is 175.2 W.
Explanation:
Data obtained from the question include the following:
Voltage (V) = 24 V
Resistance 1 (R1) = 12 Ω
Resistance 2 (R2) = 6 Ω
Resistance 3 (R3) = 18 Ω
1. Determination of the current 1 (I1)
Voltage (V) = 24 V
Resistance 1 (R1) = 12 Ω
Current 1 (I1) =..?
V = I1R1
24 = I1 x 12
Divide both side by 12
I1 = 24/12
I1 = 2 A
Therefore, the current 1 (I1) is 2 A
2. Determination of the current 2 (I2)
Voltage (V) = 24 V
Resistance 2 (R2) = 6 Ω
Current 2 (I2) =..?
V = I2R2
24 = I2 x 6
Divide both side by 6
I2 = 24/6
I2 = 4 A
Therefore, the current 2 (I2) is 4 A
3. Determination of the current 3 (I3)
Voltage (V) = 24 V
Resistance 3 (R3) = 18 Ω
Current 3 (I3) =..?
V = I3R3
24 = I3 x 18
Divide both side by 18
I3 = 24/18
I3 = 1.33 A
Therefore, the current 3 (I3) is 1.3 A.
4. Determination of power 1 (P1)
Voltage (V) = 24 V
Current 1 (I1) = 2 A
Power 1 (P1) =..?
P1 = I1V
P1 = 2 x 24
P1 = 48 W
Therefore, power 1 (P1) is 48 W.
5. Determination of power 2 (P2)
Voltage (V) = 24 V
Current 2 (I2) = 4 A
Power 2 (P2) =..?
P2 = I2V
P2 = 4 x 24
P2 = 96 W
Therefore, power 2 (P2) is 96W.
6. Determination of power 3 (P3)
Voltage (V) = 24 V
Current 3 (I3) = 1.3 A
Power 3 (P3) =..?
P3 = I3V
P3 = 1.3 x 24
P1 = 31.2 W
Therefore, power 3 (P3) is 31.2 W.
7. Determination of the total current
Current 1 (I1) = 2 A.
Current 2 (I2) = 4 A.
Current 3 (I3) = 1.3 A
Total current =.?
Total current = I1 + I2 + I3
Total current = 2 + 4 + 1.3
Total current = 7.3 A
Therefore, the total current is 7.3 A.
8. Determination of the total power.
Power 1 (P1) = 48 W.
Power 2 (P2) = 96W.
Power 3 (P3) = 31.2 W.
Total power =..?
Total power = P1 + P2 + P3
Total power = 48 + 96 + 31.2
Total power = 175.2 W
Therefore, the total power is 175.2 W.
Suppose the initial position of an object is zero, the starting velocity is 3 m/s and the final velocity was 10 m/s. The object moves with constant acceleration. Which part of a velocity vs. time graph can be used to calculate the displacement of the object? the area of the rectangle under the line the area of the rectangle above the line the area of the rectangle plus the area of the triangle under the line the area of the rectangle plus the area of the triangle above the line
Explanation:
We have,
The initial position of an object is zero.
The starting velocity is 3 m/s and the final velocity was 10 m/s.
The object moves with constant acceleration..
The area covered under the velocity-time graph gives displacement of the object. The correct option is "the area of the rectangle plus the area of the triangle under the line".
Answer:
The area of the rectangle plus the area of the triangle under the line.
What type of motion occurs when an object spins around an axis without altering its linear position?
O A
linear motion
OB.
rotational motion
OC.
translational motion
D.
vibrational motion
Answer: B.) Rotational motion
Explanation: An object can be explained as exhibiting a rotational state of motion if the movement of the object occurs along a circular path such that the body is positioned about a fixed point, that is the axis of rotation is fixed. Therefore, the axis or rotation point does not change and the body moves in a circular path. Rotational motion could be observed during the motion of a fan, wheels of cars or bicycles. Here, the axis of rotation is fixed at a point and the wheel of the car or blades of the fan moves along a circular path about the fixed point.
Which is true about the pressure of a fluid at a specific depth? A. It depends on the surface area of the fluid. B. It is exerted only in the downward direction. C. It depends only on the type of fluid. D. It varies with the total volume of the fluid.
Answer:
c) depends only on the type of fluid
Explanation:
The pressure of a fluid at a specific depth is given by:
where
is the density of the fluid
g is the gravitational acceleration
h is the depth
We see that for a given depth h, the pressure of the fluid depends only on its density, so only on the type of fluid. Therefore, the correct choice is
a) depends only on the type of fluid
The other choices are wrong because:
b) the pressure is exerted in every direction
c) the pressure does not depend on the total volume of the fluid, but only on the depth h
plZ help !!
plz answer correctly!
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Answer:
Explanation:
I-V graph always represent a straight line
20. Which of the following ray diagrams is correct?
Explanation:
The second one is the correct answer
An object moving north with an initial velocity of 14 m/s accelerates 5 m/s2 for 20 seconds. What is the final velocity of the object? 39 m/s 90 m/s 114 m/s 414 m/s
Answer:
Final velocity of the object(v) = 114 m/s
Explanation:
Given:
Initial velocity (u) = 14 m/s
Accelerates (a) = 5 m/s²
Time taken = 20 seconds
Find:
Final velocity of the object(v) = ?
Computation:
According to 1st law of motion.
⇒ v = u +at
⇒ v = 14 + (5)(20)
⇒ v = 14 + 100
⇒ v = 114 m/s
Final velocity of the object(v) = 114 m/s
what property of water results from high boiling point
Answer:
water is able to keep itself
in liquid form on the Earth's surface.
Explanation:
Pirates drag a treasure chest to the left across a sandy beach. In which direction does the treasure chest experience a frictional force, and why?
Answer:
Chest experiences the friction forces towards right
Explanation:
Friction forces can be defined as a force a body experiences when it is made to slide against the surface. Friction force always acts to stop the the body which is moving. To stop the body, it always acts in the opposite directions to the motion of the body. Therefore, if the treasure chest is dragged across a sandy beach to the left, the frictional forces will act in the right direction.
Describe when an object is said to be speeding up on a velocity versus time diagram.
Answer:
A horizontal line on a speed-time graph represents a constant speed.
Explanation:
Acceleration is defined by a sloping line on a speed-time graph. The sloping line shows the object's speed is increasing. The target either accelerates or slows down.
Velocity-time graphs are being used to illustrate the acceleration for moving objects in a horizontal path. You can use them to display momentum and to sort out movement.
Which point is labeled in the scatterplot below?
what is the formula for kinetic friction?
Answer:
kinetic friction is expressed as
Fk≈ μkFn
Where
the coefficient of kinetic friction is μk
the normal force is Fn
Explanation:
48:09 Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? The first law describes how thermal energy is conserved but not the direction it moves. The first law describes the direction thermal energy moves but not how it is conserved. The first law describes how thermal energy can be created but not how it can be destroyed. The first law describes how thermal energy can be destroyed but not how it can be created.
Answer:
A). The first law describes how thermal energy is conserved but not the direction it moves.
Explanation:
Thermodynamics is demonstrated as the branch of physics that deals with the associations or relationships between heat and other energy forms like mechanical, chemical, and electrical).
As per the question, the first law discusses that heat is a kind or form of energy and thus, processes associated with thermodynamics are subject to energy conservation principle. Therefore, heat energy can neither be destroyed nor created but rather transferred to one place to another and converted to and from other energy forms.
Thus, the first law of thermodynamics is distinct from the second law as 'the former describes how thermal energy can be conserved to and from other forms of energy and not the direction in which it moves' while the second law focuses on entropy. Therefore, option A is the correct answer.
The first law of thermodynamics describes the conservation of heat energy but not the direction it moves. Option A correct.
First law of Thermodynamics:
It states that the energy cannot be produced or destroyed it just change from one form to another.
Heat is a form of energy and thus, follow the energy conservation principle. So, heat can be change into mechanical energy.
The second law describe the direction of movement of heat.
Therefore, option A is the correct answer.
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1. Click Play ( ). You are looking down on the North Pole of Earth. From this perspective, do Earth and Venus revolve around the Sun in a clockwise or counterclockwise direction?
Answer:
Counterclockwise
Explanation:
Earth and Venus revolve around the Sun in a counterclockwise direction.
The planets of our solar system orbit the Sun in a counterclockwise direction (when viewed from above the Sun's north pole) because of the way our solar system formed.The influence of other Solar System bodies, Earth's orbit is an ellipse with the Earth-Sun barycenter as one focus and a current eccentricity of 0.0167. Since this value is close to zero, the center of the orbit is relatively close to the center of the Sun (relative to the size of the orbit).Learn more:
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Which explains the downward force produced when air flows over the winglike spoiler on a race car? A. Newton's principle B. Pascal's principle C. Bernoulli's principle D. Archimedes' principle
Answer:Archimedes' principle
Explanation: gradpoint
Bernoulli's principle explains the downward force produced when air flows over the winglike spoiler on a race car.
What is Bernoulli's principle?Bernoulli’s law states that the pressure of a moving fluid such as air is less when the fluid is moving faster.
What is a spoiler?A spoiler on a racecar is like an upside-down wing. Its shape causes air to flow more slowly and air pressure to be greater above the spoiler than below it. As a result, air pressure pushes the car downward, helping it to stay on the track.
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The frequency of which type of electromagnetic wave is just higher than that of radio waves? Infrared rays Ultraviolet rays X-rays Microwaves Gamma rays
Answer: gamma rays
Explanation:
Distinguish between constructive and destructive interference. Please use 3 content related sentences.
Answer:
In constructive interferance the waves are added up. While in distructive interferance they are subtracted.
Constructive interferance causes the increase in the amplitude of wave. While distructive interferance decreases the amplitude.
In constructive interferance crust lies over the crust of other wave. While in distructive the crust of one wave lies on the trough of other wave.
Explanation:
hello:) I don’t really understand this graph. I thought uniform acceleration means the velocity is constant so it’s a constant gradient?
Answer:
Uniform acceleration means that the object is accelerating at a constant rate. Since there is still acceleration, velocity is not constant. In fact, the velocity is increasing. This means that the object is moving faster and faster at a constant rate.
This graph is a displacement-time graph so its gradient would represent the velocity of the object. The velocity increases hence the gradient should increase (which means that the graph must be steeper and steeper with increasing time).
Constant gradient of a displacement-time graph would mean that there is no acceleration since gradient of the graph does not change so velocity is constant.
Note that it is the rate of change of velocity that is constant during uniform acceleration, not velocity.
Which vector below goes from (0,0) to (4.1)?
Answer:
Vector B
Explanation:
(0,0) is the origin or the middle. In (4,1), the 4 is the x-axis and the 1 is the y-axis.
Why does a gneiss rock have bands
Answer:
Gneiss is a metamorphic rock. The cause of the bands is from segregation.
Answer:
Gneiss rock is a type of metamorphic rock. Gneiss rock is composed of layers of different minerals. The bands are caused by segregation of different types of rock.
If you try opening a door by pushing too close to the side where the hinges are, you may find it difficult to push open. Suppose you are trying to open a door that is 75 cm wide. (Hint: To solve this one, remember the example problem in the lesson about the MA of the broom). a. If you push on the door at a point 15 cm away from the hinges, what is the mechanical advantage? b. What is the best mechanical advantage that you can obtain for any door that you simply push open? Your answer:
Answer:
a) Mechanical advantage is 0.2
b) maximum obtainable mechanical advantage is 1
Explanation:
The opening of the door is only possible when a force is used to push the door, by generating a torque on the door around the hinge.
Since the door is 75 cm wide, torque generated will be the product of the force applied and the width of the door.
torque = F x 75 = 75F
If the door was pushed at point on the door 15 cm from the hinges, the torque that will be generated will be
torque = F x 15 = 15F
a)The mechanical advantage MA is therefore
MA = 15/75 = 0.2
b) The best mechanical advantage that can be obtained from when you simply push it open is 1
From the case above, if we assume we push it at its maximum width from the hinge, then
MA = 75/75 = 1
why some bulbs are transparent and some are translucent
An overhead projector lens is 32.0 cm from a slide (the object) and has a focal length of 30.1 cm. What is the magnification of the image? PLS HELP
Answer: 15.8
Explanation:
You are given that the
Object distance U = 32 cm
Focal length F = 30.1 cm
First calculate the image distance V by using the formula
1/F = 1/U + 1/V
Substitute F and V into the formula
1/30.1 = 1/32 + 1/V
1/V = 1/30.1 - 1/32
1/V = 0.00197259
Reciprocate both sides
V = 506.94 cm
Magnification M is the ratio of image distance to object distance.
M = V/U
substitute the values of V and U into the formula
M = 506.94/32
M = 15.8
Therefore, the magnification of the image is 15.8 or approximately 16.
Answer:
-15.8
Explanation:
the other 1 didnt take into account the negative.
What are the two reasons why metals are good conductors of electricity?
Answer:
Metals are excellent conductors because the atoms in a metal form a matrix through which their outer electrons can move freely.
Explanation:
Answer:
Explanation:
Metals are good conductor of electricity because they have very large number of free valance electrons whereas glass has no free electrons to conduct electricity. So metals good conductor whereas glass is a bad conductor of electricity.
Which statement describes a characteristic of a spiral galaxy?
O It is shaped like a pinwheel.
O It has no new star formation.
O It is made only of gases.
O It is smaller than other types of galaxies.
Answer:
It is shaped like a pinwheel
Explanation:
That's the shape.
The shape is like a pinwheel, which best describes a characteristic of a spiral galaxy. So option 1 is correct.
What is a Spiral Galaxy?The twisted clusters of stars and gas known as spiral galaxies, which are frequently formed of hot, young stars, have striking shapes. As opposed to the other two major groups of galaxy forms, elliptical and irregular, spiral galaxies make up the majority of the galaxies that astronomers have so far discovered.
A spiral galaxy is one that contains Earth and our solar system, such as the Milky Way.
Approximately 72% of the galaxies that have been spotted by scientists are spiral galaxies, according to a 2010 Hubble Space Telescope survey.
The arms that circle the galaxy are formed when the disc of stars orbiting the bulge divides. These spiral arms are rich in gas, dust, and newborn stars that shine brilliantly before dying suddenly.
Hence, the first option is correct that a spiral galaxy is shaped like a pinwheel.
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In the demolition of an old building, a 1,300 kg wrecking ball hits the building at 1.07 m/s2. Calculate the amount of force at which the wrecking ball strikes the building. The wrecking ball strikes the building with a force of N.
Answer: F = 1391 N
Explanation:
The information given to you are:
Mass M = 1300 kg
Acceleration a = 1.07 m/s^2
The magnitude of the force striking the building will be
F = ma
Where
F = force
Substitute mass M and acceleration a into the formula
F = 1300 × 1.07
F = 1391 N
Therefore, the wrecking ball strikes the building with a force of 1391 N
A metallic rod has a length 1.5m and a diameter 0.2 cm. The rod carries a current of 5A
when a p.d of 75V is applied between its ends.
(a) Find the current density in the rod.
(b) Calculate the magnitude of the electric field applied to the rod.
(c) Calculate the resistivity and conductivity of the material of the rod.
Answer:
Explanation:
Current density J = i / A where i is current and A is cross sectional area
J = 5 / π x ( .1 x 10⁻² )²
= 1.6 x 10⁶ A / m²
b )
electric field applied E = V / l where V is potential difference and l is lemgth of rod
E = 75 / 1.5
= 50 v / m
c )
J = σ E
J is current density , σ is conductivity and E is electric field .
1.6 x 10⁶ = σ x 50
σ = 3.2 x 10⁴ Ω⁻¹ m⁻¹
Resistivity = 1 / σ
= 1 / 3.2 x 10⁴
= .3125 x 10⁻⁴
=3.125 x 10⁻⁵ Ω m
Mars, which has a radius of 3.4 × 106 m and a mass of 6.4 × 1023 kg, orbits the Sun, which has a mass of 2.0 × 1030 kg at a distance of 2.3 × 1011m. Mar’s revolution around the sun is 687 days. It takes 24 hours and 37 minutes to complete one revolution. Which is greater, the tangential speed of Mars’s rotation or revolution?
Answer:
Tangential speed of Mass revolution is greater
Explanation:
In the above question, we are given the following values:
Radius of Mars = 3.4 × 10^6 m
Mass of Mars = 6.4 × 10^23 kg
Mass of the sun = 2.0 × 10^30 kg at a distance of 2.3 × 10^11m.
Mar’s revolution around the sun = 687 days.
Time of Revolution = 24 hours and 37 minutes to complete one revolution.
Step 1
Find the tangential speed of rotation of Mars
Rotation of Mars = 2 × π × r
Radius of Mars = 3.4 × 10^6 m
Rotation of Mars = 2 × π × 3.4 × 10^6 m
Rotation of Mars = 21362830.044m
= 21.4 × 10^6 m
Tangential Speed of rotation for Mars = Rotation of Mars/ time
Time = 24 hrs 37 minutes
Converting to seconds = 88620s
Tangential Speed of rotation = 21.4 × 10^6 m/ 88620s
= 241.48047845m/s
= 241.5 m/s
Step 2
revolution of Mars = 2 × π × d
d = 2.3 × 10^11m.
= 2 × π × 2.3 × 10^11m = 1.45 × 10^12m
Revolution of Mars = 687 days
Converting 687 days to seconds = 59356800s
Tangential Speed of Revolution of Mars = Revolution of Mars/ times
Tangential Speed of Revolution = 1.45 × 10^12m/595356800s
Tangential Speed of Revolution = 24420m/s
Comparing the Tangential Speed of Rotation with the Tangential speed of Revolution, we can see the GREATER ONE IS THE TANGENTIAL SPEED OF REVOLUTION.
Answer:
revolution
Explanation:
on edgenuity :)
What would happen if all the powers of government were held by one person or one group of people? Would it be a good thing or a bad thing? Why?
Answer:
it would be a bad thing because if one person controlled the government then there would only be one mind in charge.
Explanation:
A lens is used to make an image of magnification -1.50. The image is 30.0 cm from the lens. What is the object’s distance (unit=cm)?
Answer: Object distance is : 20cm
Explanation:
Given the following :
Magnification (m) = - 1.50
Image Distance from lens (v) = 30cm
Calculate the object distance (u) :
Recall:
Magnification = - [image distance (v) / object distance (u)]
Therefore, Inputting our values :
-1.50 = - (30 / u)
1.50 * u = 30
u = 30 / 1.50
u = 20 cm
Answer:
20 cm
Explanation:
acellus