Answer:
B
Explanation:
JUST MULTIPLY THE MASS(3.4)×ACCELERATION(8.1)
AND YOU GET THE ANSWER IN NEWTONS
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.
A pendulum clock is taken to the moon (g = 1.6 N/kg). How long must the pendulum be in order for the clock to
continue keeping accurate time (1 second cycle)?
3.2 m
7.9 m
0 0.25 m
0.041 m
Answer:
0.041 m
Explanation:
T = 2π√(L/g)
1 s = 2π√(L / (1.6 N/kg))
L = 0.041 m
Answer:
0.041
Explanation:
got right on test!
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
Ethan made a diagram to compare examples of the first and second laws of thermodynamics. What belongs in the areas marked X and Y?
X: The internal energy of a piston system increases
as heat is added and rises to a cool area
Y: As thermal energy is added to a container, some
of the energy is lost to the environment
X: As thermal energy is added to a container, some
of the energy is lost to the environment
Y: The internal energy of a piston system increases
as heat is added and rises to a cool area
X: A cold spoon placed in hot liquid gets warmer
Y: Thermal energy is converted to light energy
X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
Answer:
D: X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
Explanation:
j took the quiz
The first and second laws of thermodynamics are used to describe the process of heat transfer.
What are the laws of thermodynamics?The laws of thermodynamics are laws that show the transfer of heat energy there are three laws of thermodynamics that guide heat transfer.
From the statements of the first and second laws of thermodynamics, the statements that fit into the circles are;
X: Thermal energy is converted to light energy
Y: A cold spoon placed in hot liquid gets warmer
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Which line shows both positive velocity and positive acceleration?
I THINK LINE [ D ] IS THE RIGHT ANSWER....
Explanation:
BECAUSE IN [ D ] THERE SHOWS MANY ANGLE AND THERE LIES BOTH POSITIVE VELOCITY AND POSITIVE ACCELERATION.......
HOPE IT HELP.......❣❣❣
Answer:
Line C
Explanation:
Start at point O and accelerates upwards in a positive slope.
What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m? please no bad answers
Answer:
39 m/s
Explanation:
speed = frequency x wavelength (All SI Unit)
speed = 100 Hz x 0.30 m = 30 m/s
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 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.
TP-10 Which of the following is considered a safe refueling practice?
Turning your key on to operate the fuel gauge
Sending all passengers below while refueling
Using the hands-free clip to avoid spills
Closing all hatches and doors while refueling
Answer:
The correct option is;
Sending all passengers below while refueling
Explanation:
Safety tips for refueling a boat includes;
1) People that are not involved in the refueling of the boat should be made to leave the area
2) The engines, electronics, ignition system and open flames should be off
3) Ensure the boat is properly secured to the dock
4) Do not use the hands-free clips and try not to be distracted
5) Ensure not to completely fill the fuel tank as fuel has the tendency to expand as its temperature rises. The tank should have about 90% filling
Answer:
Close all hatches and doorsWould you have been a Federalist or an Anti-Federalist? Why?
Answer:
Explanation:
I would have been an anti-federalist. They favored a weak central government because they related it to the British tyranny. Federalists believed in a strong central government, almost controlling. I would not have respected this type of government.
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:
Can please tell what mistake I did??question number 10
Explanation:
When we draw the diagram of the motion we get a right angled triangle.
We have an angle of 30° and a base of 17.3M.
We will use trigonometric ratios to solve this.
We will use tan.
Tan = Opposite / adjacent
Tan 30° = h / 17.3
h = Tan 30 × 17.3
h = 0.5774 × 17.3 = 9.99 M
or 9.99 can be roundoffed with 10m
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.
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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A positively charged light metal ball is suspended between two oppositely charged metal plates on
an insulating thread as shown below. After being charged once, the plates are disconnected from the
battery. Describe the behavior of the ball. Please use 3 content related sentences.
(ref: p.553-561)
Answer:
The positively charged ball moves between both charged plates till the plates and the ball all become neutral.
Check Explanation for more.
Explanation:
Let the ball be in square brackets, and the plates in normal brackets.
(+) [+] (-)
From the law that like charges repel and unlike charges attract.
The positive ball would go first to the negatively charged plate. After which, the ball would hold more negative charges overall than before.
Because the ball is now more negatively charged, it then travels towards the positive plate. In the same manner, the ball would transfer negative electrons to the positive plate.
So, when leaving the positive plate, the ball would be more positive and be drawn towards the negative plate once more. In doing so, it would make the negative plate more positive.
Then, the ball again holds more negative electrons and is drawn towards the positive plate once more.
This back and forth process continues until the once-positive and once-negative plates become neutral, that is, they are discharged.
The ball hanging on the insulated thread becomes neutral too at this point.
Hope this Helps!!!
A camera lens focuses on an object
75.0 cm from the lens. The image
forms 3.50 cm behind the lens.
What is the magnification of the
image? PLS HELP
Answer:
m = 0.047
Explanation:
We have given that, a camera lens focuses on an object 75 cm from the lens, it means that the object distance is 75 cm
The image forms 3.50 cm behind the lens. It means that the image distance is 3.5 cm.
It is required to find the magnification of the image. The ratio of image distance to the object distance is called magnification. So,
[tex]m=\dfrac{v}{u}\\\\m=\dfrac{3.5}{75}\\\\m=0.047[/tex]
So, the magnification of the image is 0.047
Answer:
M = -0.047
Explanation:
if you got 0.047 you used the wrong equation -> m = image height/object height
the correct equation is:
M = image height/object height = -(image distance/object distance)
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
Sandra wants to know how many students are a part of the business department at her school. She has a list of 240
students' majors. She goes to her record and selects the column for the department and the column with the student
names. She clicks on the Total button and in the Student Name column selects
Average
Count
Maximum
Minimum
Answer:
Count
Explanation:
The count will show you how many students are apart of the business department
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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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
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:
Frank gives a box of books a push to the right, which makes it slide across his
bedroom floor. Friction slows the box down as it slides. Which free-body
diagram shows the box as it is sliding to the right, after Frank has stopped
pushing it?
Answer:
C
Explanation:
Answer:
yea its c
Explanation:
The _________of friction is a number that represents the resistance to sliding between two surfaces in contact with one another.
Answer:
coefficient
Explanation:
vocabulary
Answer:
Hey!
Your answer is definitely coefficient!
Explanation:
Hope this helps!
Which material is typically used as a thermal insulator?
copper
foam
ceramic
aluminum
Answer:
Ceramic is typically used as a thermal insulator.
Explanation:
What is ceramic?Ceramic is a bad conductor of heat. It is hard and anti corrosion.It is made by the mixture of clay, powders and water.Ceramic is also bad conductor of electricity.Hence ceramic is typically used as a thermal insulator?
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Answer:(B)Foam
Explanation:EdG
Which letter represents the location of the image produced by the lens? Answer is Z on Edge 2020
Answer:
Z
Explanation:
The location of image produce by a converging lens is dependent on the position of the object.
Considering the diagram given above, the object is located at W (i.e before 2F) on the left side. Therefore, the image formed will be inverted and it will be located at Z (i.e between F and 2F) on the right side..
vouch, the answer is Z
A man travels 15 km east before turning around and heading 5 km west. What is his displacement?
A) 20 km
B) 10 km west
C) 10 km East
D) 20 km East
Answer:
10 km East
Displacement is the shortest path between two points.
Which option describes a phase change
Answer:
b. Gasloine evaporating into the air
I tryed to answer
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.
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 :)
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.