Answer:
not true
Explanation:
substitution is convenient here
2x + (-2x + 5) = -7
2x - 2x - 5 = -7
-5 = -7
not an equality, thus the lines are parallel and have no intersection
Please help!!!! How many volts does this source provide for the circuit?
2
4
8
12
Answer:
12 volts
Explanation:
4 + 4 + 4 = 12 volts all volts on parallel circuit are the same
how can a duck cross a road?
Answer:
Using its legs
Explanation:
Over an estimated billion years mammals and other species have developed this "revolutionary engine" lol. Legs allow for faster, more efficient and overall better transportation means, its not reliant on any other source just on power which comes from foods which is broken down in the Silvia, soon to become the stomach. If you want to dig deeper into this topic search of video's on how the mitochondria is the factory, or the powerhouse of the cell, also I recommend Kurzgesagt on how the food is processed and turn into energy, and how that energy can support life.
Answer:
With his or her legs.
Explanation:
The he-duck or she-duck may cross a road in a number of ways, however the most common is to simply walk. Ducks often walk across roads to mock comedian chickens in satire. They put one webbed foot in front of the other, and shake their butts, or, scientifically, duckicus butticus. [DUC-I-CUS BUT-I-CUS]
An amazing phenomenon.
An object rotates describing a horizontal circumference when subjected to a centripetal force F. What centripetal force will act on the object
if the radius of the circle is doubled and the kinetic energy of the object is halved?
A) F/4
B) F/2
C) F
D) 4F
please explain this to me :(
Answer:
Centripetal Force Requirement
The Forbidden F-Word
Mathematics of Circular Motion
As mentioned earlier in this lesson, an object moving in a circle is experiencing an acceleration. Even if moving around the perimeter of the circle with a constant speed, there is still a change in velocity and subsequently an acceleration. This acceleration is directed towards the center of the circle. And in accord with Newton's second law of motion, an object which experiences an acceleration must also be experiencing a net force. The direction of the net force is in the same direction as the acceleration. So for an object moving in a circle, there must be an inward force acting upon it in order to cause its inward acceleration. This is sometimes referred to as the centripetal force requirement. The word centripetal (not to be confused with the F-word centrifugal) means center seeking. For object's moving in circular motion, there is a net force acting towards the center which causes the object to seek the center.
To understand the importance of a centripetal force, it is important to have a sturdy understanding of the Newton's first law of motion - the law of inertia. The law of inertia states that ...
... objects in motion tend to stay in motion with the same speed and the same direction unless acted upon by an unbalanced force.
According to Newton's first law of motion, it is the natural tendency of all moving objects to continue in motion in the same direction that they are moving ... unless some form of unbalanced force acts upon the object to deviate its motion from its straight-line path. Moving objects will tend to naturally travel in straight lines; an unbalanced force is only required to cause it to turn. Thus, the presence of an unbalanced force is required for objects to move in circles.
Explanation:
How does gravity keep the moon in orbit around earth
Answer:
The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.
Explanation:
The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.
Answer is above
Hope this helps.
an aircraft acceleration from 100m/s to 300m/s in 100 s what is acceleration
Answer:
[tex](300 - 100) \div 100 [/tex]
If we have a velocity of 20 m/s and our acceleration is -5 m/s, then after 2 seconds our velocity will be....
a) 15 m/s
b) 40 m
c) 10 m/s
d) -10 m/s
Answer:
v = 10 m/s
Explanation:
We have,
Our initial velocity is 20 m/s
Our acceleration, [tex]a=-5\ m/s^2[/tex]
It is required to find the velocity after 2 seconds. It is a concept based on equation of kinematics. Using first equation:
[tex]v=u+at[/tex]
Plugging all the known values
[tex]v=20+(-5)(2)\\\\v=10\ m/s[/tex]
So, our final velocity is 10 m/s.
If an object is moving with a velocity of 24 m/s and has an acceleration of -4m/s2,
how long will it take it to stop?
A.-6s
B.6s
C.-96 s
D.20s
Answer:a
Explanation:
at what location in the refrigerator is the most thermal energy removed?
Answer:
Condenser
Explanation:
The refrigerator work on a simple cycle:
1- When the cold air inside the refrigerator starts to get warm, it loses its thermal energy ot the cold refrigerant which is flowing inside an evaporator. This thermal energy converts the refrigerant into a gas.
2- The refrigerant, in a form of gas, goes to the compressor. The compressor compresses it and increases its temperature even more.
3- Then it goes to the condenser where it loses its most of the thermal energy to the condenser coils. When it loses the energy. it comes back to liquid form.
4.The refrigerant flow back to the evaporator
Cycle continuous
Read the scenario below and answer the question that follows. Susan was in her algebra class preparing to take a test. Her instructor, Mrs. Williams, tells Susan, “Try hard, even though math can be difficult for women to succeed in.” What is the most likely effect of Mrs. Williams’ comment on Susan’s test performance, and why? A. improved performance due to study behavior B. improved performance due to mores C. reduced performance due to stereotype threat D. reduced performance due to cultural shaping
Answer:
c. reduced preformance due to stereotype threat
Explanation:
The most likely effect of Mrs. Williams' comment on Susan's test performance was that the reduced performance due to stereotype threat. Thus, the correct option is C.
What is Stereotype threat?Stereotype threat is a situational predicament in which the people feel themselves to be at risk or are actually at risk of conforming to the stereotypes about their social group in the community. It is theorized to be a contributing factor to the long-standing racial and gender gaps in the academic performance of a community as a whole.
The worst part of stereotype threat would be that it becomes socially acceptable for the people to agree and think that it is true of that segment of the society. This has been the tool of tyrants and tyrannical regimes to divide and conquer since the down of empires.
Therefore, the correct option is C.
Learn more about Stereotype threat here:
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A soccer player kicks a ball with initial velocity of 10m/s at an angle of 30 degrees above the horizontal.....what is the magnitude of the vector
Answer: 10m/s^2
Explanation:
Given the following :
Initial Velocity(U) = 10m/s
Angle of inclination = 30°
In other to calculate the magnitude of the vector,
We need to resolve into verti AL and horizontal component.
Vertical component of a vector(Uy) = U × Sinθ
Horizontal component(Ux) = U × Cosθ
Uy = 10 × sin30 = 10 × 0.5 = 5m/s
Ux = 10 × Cos30 = 10 × 0.866 = 8.66m/s
Therefore the magnitude equals :
U = √(Uy)^2 + (Ux)^2
U = √5^2 + 8.66^2
U = √25 + 74.9956
U = √99.9956
U = 9.9997799
U = 10m/s^2
The pressure of a gas contained in a cylinder with a movable piston is 300 Pa. The area of the piston is 0.5 m² . Calculate the force that is exerted on the piston.
Answer:
150N
Explanation:
formula= pressure= force/area
300pa= x/0.5
300*0.5= x
150N= x
force= 150N
. Alpha-emitting substances, such as radon gas, can be a serious health hazard only if _____. their radiation strikes the skin they are inhaled or eaten exposure to them is external
Answer:Answer:
They are inhaled or eaten
Explanation:
Radioactivity can be defined as the process in which an unstable atomic nucleus spontaneously emits ionizing radiation and charge particles. This eventually results in the formation of an energetically stable atomic nucleus.
Examples of radioactive elements are Uranium, Polonium, Thorium, Radon, etc. The radiation emitted during this process is classified as;
1. Alpha radiation (α).
2. Beta radiation (β).
3. Gamma radiation (G).
Alpha-emitting substances, such as radon gas, can be a serious health hazard only if they are inhaled or eaten. Alpha-emitting substances compared to other radiation has very short-range particle and as such cannot penetrate the human skin or body.
Part B
Does the size of the particles change as the substance changes state?
Answer:
No. The size of the particles in the substance remains the same when the state of matter changes.
Explanation:
this is the exact answer
Which of these os true? (A)light travels in a straight line.(B)light travels in a random manner. (C) parallel beams are divergent in nature.(D)parallel beams are convergent in nature.(E)non of the above
Answer:
light travels in a straight line
Explanation:
the others are wrong
A quarterback back pedals 2.5 meters northward and then
runs 6.8 meters southward.
Answer:
The travels is 9.3 and displacement of 4.3 meters
Explanation:
The computation of distance and displacement is shown below:-
Distance = Northward meters + Southward meters
= 2.5 meters + 6.8 meters
= 9.3 meters
Displacement= Final - Initial distance
= 6.8 meters - 2.5 meters
= 4.3 meters
Direction→southward
Here direction is going towards the southwards as southwards distance in higher than the northward distance of displacement is southward.
how much would you weigh on an imaginary planet that has no gravitational force?
0kg
If the gravitational pull is zero and I multiply by mass I get a zero
You can smell an open bottle of perfume in a room because __________.
A. the liquid vaporizes and the resulting gas molecules wander about the room
B. the scent travels without needing a medium to travel through
C. the air molecules bond with some of the perfume, carrying it around the room
D. the perfume in the bottle is under pressure
Answer:
The answer is C
Explanation:
I've just answered this question on a quiz
On what principle does a bottle opener work
Answer:
Bottle opener works on a fulcrum.
Explanation:
A bottle opener is a second-class lever because the pivot point is at one end of the opener and the load is in the middle.
Which of the following is not sublimable? *
Answer:
where is your option ?
you can't write option so I think
sodium chloride is not sublimable
need this asap will mark brainliest
Answer:
0.203 kN
Explanation:
203 N *(1 kN/1000N) = 0.203 kN
Which is NOT true about Balanced Forces?
Has a net force equal to zero.
Do not cause a change in motion.
o Act in the same direction.
Are equal in size.
Answer:
are in equal size or act in same direction
Balanced forces are the forces which are equal in size. Balanced force has a net force which is equal to zero, and these do not cause a change in motion. Thus, the correct option is C.
What are balanced forces?Balanced forces are those which are opposite in direction and equal in the size. Balanced forces are considered to be in the state of equilibrium. When the forces are balanced and there is no change in direction. Combined forces which are balanced are always equal to zero. These forces are equal and hence do not cause any change in the motion of an object.
Examples of balanced forces include resting against a wall, lying down, aircraft in a steady-flight, floating in water, and standing in the ground.
Therefore, the correct option is C.
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A 10 kg rock is suspended 320 m above the ground.
What is its kinetic energy before it is released?
K.E. =
Answer:
it is a mass of an object that increases to a kinetic energy.
Explanation:
Answer:
[tex]k=0J[/tex]
Explanation:
Kinetic Energy formula:
[tex]K=\frac{1}{2} (m)(v^2)[/tex]
The rocks suspended 320 m above ground. The rock is not in motion. The speed of the rock is zero.
Using the formula:
[tex]K=\frac{1}{2} (m)(0^2)[/tex]
[tex]K=0J[/tex]
Which waves help you to know if there is a snow day at school for the day?
Answer:
Electromagnetic wave
Explanation:
Snow days are announced on the by phoning the parents and guardians and also the news about a snow day can be broadcast on the television or radio airwaves or on the internet which are forms of electromagnetic wave transmission
An electromagnetic wave are oscillations of electric and magnetic fields which form electric and magnetic field vibrations
The direction of the oscillating electric and magnetic fields is perpendicular to the direction of propagation of the electromagnetic wave.
If a girl is running along straight road with a uniform velocity 1.5 m/s .Find the acceleration
Answer:
Acceleration = 0
Explanation:
Uniform Velocity = 1.5m/s
Acceleration is defined as the change in Velocity of a moving object with time.
Acceleration = (V2 - V1) / t
Where v2 and V1 are velocities and t is time
A body is said to be moving at a uniform Velocity if the Velocity with which it moves is constant. That is there is no change in the Velocity as the body progresses
Mathematically ;
(V2 - V1) = 0 [uniform / constant Velocity]
acceleration = 0 / time
Acceleration = 0
7. Convert 746 days to centuries.
Answer: 0.0208 Centuries
Explanation:
There is 2.739*10^-5 centuries per 1 day.
We can take 746 days and multiply it by that 2.7 number to get how many centuries are in 746 days.
[tex]746 *(2.793*10^{-5})[/tex] = 0.0208 centuries
Each color that we see corresponds to a different _____ of light.
a. speed
b. phase
c. amplitude
d. wavelength
Answer:
D wavelength
Explanation:
The different wavelengths determine the color.
what is the frequency of an ocean wave that is traveling at a speed of 45 m/s if it has a wavelength of 3 meters.
please show work
Answer:
Frequency, f = 15 Hz
Explanation:
We have,
Speed of an ocean wave is 45 m/s
Wavelength of a wave is 3 m
It is required to find the frequency of an ocean wave.
Speed of a wave, [tex]v=f\lambda[/tex], f = frequency of ocean wave
[tex]f=\dfrac{v}{\lambda}\\\\f=\dfrac{45}{3}\\\\f=15\ Hz[/tex]
So, the frequency of an ocean wave is 15 Hz.
the speed of the car changes from 12 metre per square to 24 metre per square in 1 minute the magnitude of acceleration of the car is a)Zero B )0.25 metre square c)1÷13 m/s^2 d.)
1÷5m/s^2
The answer is D (1/5)m/s^2
A potential difference of 10.0 volts exists between two points, A and B, within an electric field. What is the
magnitude of charge that requires 2.0 x 10-2 joule of work to move it from A to B?
1. 5.0 x 10^2 C
2. 2.0 x 10^-1 C
3. 5.0 x 10^-2 C
4. 2.0 x 10^-3 C
Answer:
answer is 4
Explanation:
The charge that is moved is required.
The magnitude of charge moved is option 4. [tex]2\times 10^{-3}\ \text{C}[/tex]
Potential differenceV = Potential difference = 10.0 V
W = Work done = [tex]2\times10^{-2}\ \text{J}[/tex]
q = Magnitude of charge
When work done on moving a charge is divided by the potential difference we get the magnitude of the charge that is moved.
The charge of an object is the result of an excess or a lack of positive or negative charges on a body.
So, the magnitude of charge is given by
[tex]q=\dfrac{W}{V}\\\Rightarrow q=\dfrac{2\times 10^{-2}}{10}\\\Rightarrow q=2\times 10^{-3}\ \text{C}[/tex]
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Give two examples of spatial interference which can be easily observed.