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.
20. Which of the following ray diagrams is correct?
Explanation:
The second one is the correct answer
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:
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.
plZ help !!
plz answer correctly!
will give the brainliest!!
Answer:
Explanation:
I-V graph always represent a straight line
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.
To learn more about Spiral Galaxy :
https://brainly.com/question/13074009
#SPJ2
an object that does not allow any light to pass through it is commonly known as
A: Translucent
B: Visible
C: Transparent
D: Opaque
This is not physics fyi this is physical science but it was not on the list
Answer: D: Opaque
Explanation:
Definition of Opaque on Merriam Webster: blocking the passage of radiant energy and especially light
Answer:
opaque
Explanation:
Definition of Opaque on Merriam Webster: blocking the passage of radiant energy and especially light
hope this helps stay safe :)
A town is considering building a biodiesel power plant that would burn biomass to generate electricity. Which of the following correctly lists an advantage and a disadvantage of this project?
A) Advantage: it could help get rid of unwanted waste. Disadvantage: there is no way to use the electricity created.
B) Advantage: it reduces dependence on fossil fuels. Disadvantage: it would emit pollution into the air.
C) Advantage: it is a commonly used energy source. Disadvantage: building the plant would attract new people to the area.
D) Advantage: it would use energy from the sun and wind. Disadvantage: it is a non-renewable source of energy.
Answer:
A ' is the only choice that has a true advantage and a true disadvantage.
Explanation:
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.
Which point is labeled in the scatterplot below?
Part 1: Research hurricane trends for the time periods 1995-2004 and 2005-2014. Use your research to answer the following questions.
A. What was the average number of tropical storms per season for the time period 1995-2004?
B. What was the average number of hurricanes per season for the time period 1995-2004?
Answer:
A. 1.3 per season
B. 0.77 per season
Explanation:
In the organisation's website, the National Oceanic and Atmospheric Administration, NOAA, in 2004 stated that, since 1995, there has been an increase (above average) in the Atlantic ocean's tropical clone activity corresponding to the multi-decadal oscillation's active phase
That since 1995 there has been 13 tropical storm and 7.7 hurricanes
Therefore;
Since the number of years between 1995 and 2004 = 10 Years, we have;
A, The average number of tropical storm per, season = 13/10 = 1.3 per season
B. The average number of hurricane, per season = 7.7/10 = 0.77 per season.
Which option describes a phase change
Answer:
b. Gasloine evaporating into the air
I tryed to answer
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
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
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 answer best describes the scientific method?
A. An experiment that has no independent variables
o
B. Ten steps that are followed in a certain order
C. The basic categories for five processes that scientists use
D. The exact order of steps used in every experiment
SUBMIT
Answer:
D. The exact order of steps used in every experiment
Explanation:
since the scientific meathod is a process of exact steps used to create an experiment this would be the closest answer
Answer:
C. The basic categories for five processes that scientists use
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.
A motorcycle is capable of accelerating at 1.5 m/s 2. Starting from rest how far can it travel in 0.5 seconds?
Answer:
use Newton's second law of motion
Explanation:
s= ut + ½at²
where u is initial velocity
s is distance covered
a is accerelation
t is time
s = 0×0.5 + ½×1.5+0.5²
=0.1875m
that's it .give me a brainliest if you don't mind
Answer:
0.1875 or 0.19 if you round
Explanation:
Δd = 1/2aΔt^2 +v1Δt
Δd = 1/2aΔt^2 + (0)Δt
Δd = 1/2(1.5)(0.5^2)
Δd = 0.1875m
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
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:
Which refers to the thermal energy that flows from one substance to another when the substances differ in temperature?
heat
temperature
convection
flow
Heat simply refers to the thermal energy that flows from one substance to another when the substances differ in temperature
However, thermal energy simply means the internal energy which is present in a system in a state of thermodynamic equilibrium as a result of ts temperature.
What is temperature?Temperature can be defined as the degree of hotness or coldness of a body.
So therefore, the thermal energy that flows from one substance to another when the substances differ in temperature is heat energy
Learn more about heat or thermal energy:
https://brainly.com/question/13439286
The term which refers to the thermal energy that flows from one substance to another when the substances differ in temperature is heat.
What is heat energy?This is the energy transferred from one body to another as the result of a difference in temperature of the body.
Heat is a flow of energy due to temperature difference between two regions.
Therefore, we can conclude that the term which refers to the thermal energy that flows from one substance to another when the substances differ in temperature is heat.
Learn more about heat energy here: https://brainly.com/question/19666326
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 property of water results from high boiling point
Answer:
water is able to keep itself
in liquid form on the Earth's surface.
Explanation:
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
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.
To know more about First law of Thermodynamics:
https://brainly.com/question/7107028
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.
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
Which explains the operation of a hydraulic lift system? A. Archimedes' principle B. Pascal's principle C. Newton's principle D. Bernoulli's principle
Answer: B. Pascal's principle
This is the idea where you compress a liquid on one end of a tube (more or less), and the liquid's pressure is transmitted to the other end to help lift a heavy object. Often the compressing force is downward to take advantage of gravity.
why some bulbs are transparent and some are translucent
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:
brainly.com/question/17717852