According to the given statement these option are apply for strong hypothesis:
B-A good hypothesis results in a test with quantifiable outcomes.
C-A good hypothesis leads to a test with measurable results.
E-A good hypothesis provides a possible explanation to answer a scientific question.
What is a hypothesis example?A few examples of simple hypotheses: "Students who eat breakfast will perform better on a math exam than students who do not eat breakfast." Complex hypothesis: "Students who experience test anxiety before an English exam will get lower scores than students who do not experience test anxiety."
What three categories of hypothesis are there?Simple hypothesis is one example of a hypothesis. complex hypothesis direction-hypothesis
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Which statement describes the best reason for having a strong hypothesis ? Check all that apply.
A-A good hypothesis is based on one's personal opinion.
B-A good hypothesis can be tested.
C-A good hypothesis results in a test with quantifiable outcomes.
D-A good hypothesis does not always have to be based on prior knowledge or research.
E-A good hypothesis provides a possible explanation to answer a scientific question.
The electric field 1.8 cm from a small object points toward the object with a strength of 180,000 n/c. what is the object's charge?
Charge,Q = 6.48 × [tex]10^-^9[/tex] C
How is the object's charge calculated?It is given that,
Electric field strength, E = 180000 N/C
Distance from a small object, r = 1.8 cm = 0.018 m
Electric field at a point is given by :
[tex]E=\frac{KQ}{r^2}[/tex]
Q is the charge on an object
[tex]Q=\frac{Er^2}{k}[/tex]
Q = [180000 × [tex](0.018)^2[/tex]] ÷ 9 × [tex]10^9[/tex]
Q = 6.48 × [tex]10^-^9[/tex] C
So, the charge on the object is Q = 6.48 × [tex]10^-^9[/tex] C . Hence, this is the required solution.
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What does dependent and independent variables mean in science?
Answer:
Independent variable is the variable that causes the changes in the experiment. Dependent variable is the variable that is affected by the changes.
Explanation:
A 7.8 kg outdoor copper sculpture heats up during the day from 28°C to 87°C. How much energy was absorbed? Note: Copper has a specific heat of
390 J/kg *C.
The energy absorbed outdoor copper sculpture heats up during the day q = 1.79 x 10⁵ J.
Equation :To find energy using formula,
q = mcΔT
where,
q is energy
m is mass
c is specific heat
ΔT is change in temperature
Given,
m = 7.8 kg
c = 390 J/kg
T₁ = 28°C
T₂ = 87°C
To find ΔT,
ΔT = T₂ - T₁
ΔT = 87° - 28°
ΔT = 59°C
Now, putting values,
q = mcΔT
q = 7.8 kg x 390 J/kg x 59
q = 1.79 x 10⁵ J
Is copper good for sculptures?The best materials for sculpture are copper and copper alloys for a variety of reasons. They offer countless artistic possibilities because they can be molded into any desired shape. Copper components can be mechanically joined or assembled by bolting or bonded by welding, enabling works of enormous size.
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In the competitive forces model, the central element that the other four elements contribute directly to strength is:___________
In the competitive forces model, the central element that the other four elements contribute directly to strength is rivalry among established firms in the industry.
The Competitive Forces Model is an essential technique in strategic analysis for analyzing an industry's competitiveness. The concept is most widely known as Porter's Five Forces Model. It consists of the following five forces: rivalry intensity, threat of possible new entrants, buyer negotiating strength, supplier bargaining power, and threat of alternative products and/or services. Among all the five forces, rivalry among established firms contributes to strength.
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Imagine another universe that is completely empty except for a large solid sphere at rest. Suddenly, an identical sphere pops into existence 1 trillion kilometers away. What will happen?
The event that will happen will depend on the mass of the spheres and will result in one of the spheres being attracted to the other by gravity into its gravitational field.
What is gravity?Gravity is a force which causes mutual attraction between all objects that possess mass or energy.
Examples of gravity include:
orbiting of satellites around the earthrevolution of the moon around the earth.Gravity is one of the four fundamental forces present in the universe.
Gravity is important in several ways such as:
keeping us and objects close to the ground,ensures that objects fall to the ground when thrown upprovides the muscles with resistance which helps us do workensure that objects have weightThe suddenly appearance of an identical sphere 1 trillion kilometers away from the original sphere in the universe will cause the spheres to attract each other into their gravitational field with a force that depends on the mass of the spheres.
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Explain what dawkins says selection is acting on in chapter 2 and how that variation is distributed throughout a population (gene pool) (blending vs. independent assortment
Dawkins says selection acts on the variations in the populations which are responsible for increasing or decreasing the fitness of the individuals carrying them.
Variation is distributed population following Mendelian genetics. Like the law of independent assortment where variations are transferred independently of each other. When blending inheritance was discarded where traits were thought to be average of that of parents of progeny , which was not the case in many cases.
One example of unconscious selection is the loss of various traits like loss of natural dispersal mechanisms, even and rapid seed germination, larger propagules, simultaneous ripening, and loss of mechanical protection as well as changes in the breeding system. This loss or selection on these traits while selecting for other traits like more yield and water efficiency , resistance to diseases etc. This unconscious selection associated with other selection by humans is unconscious.
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A 3.5-kg plastic tank that has a volume of 0.2 m3 is filled with liquid water. assuming the density of water is 1000 kg/m3, determine the weight of the combined system.
The weight of the combined system = 1,996.3 N
How is the weight of the combined system calculated?
Given,
Mass of the Plastic tank = 3.5 kg
Volume of the liquid water in the tank = 0.2 m³
Density of water = 1000 kg/m³
Now,
We know
Density = Mass ÷ Volume
Thus,
Mass = Density × Volume
therefore,
Mass of the water in the tank = 1000 × 0.2
= 200 kg
Thus,
The mass of the combined system = 3.5 kg + 200 kg = 203.5 Kg
Also,
Weight in N = Mass × Acceleration due to gravity (g)
and,
g = 9.81 m/s²
Therefore,
The weight of the combined system = 203.5 kg × 9.81 m/s²
= 1,996.3 N
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Find the c flag value after each of the following codes:
(a) ldi r20,0x54
(b) ldi r23,0
(c) loi r30,0xff loi r25,0xc4 loi r16,0xff loi r18,0x05 add r20,r25 add r23,r16 add r30,rl8
A boolean variable with the value "true" or "false" is what is referred to as a "flag" variable. You can either use an integer value with zero for "false" and semi for "true" or the boolean type with true or false.
CY is the carry flag's symbol. If a carry is produced during the procedure, it will be set to 1.
The procedure's outcome would be:
54 + C4 = 01010100 + 11000100
= 100011000
however because it cannot fit into the 8-bit destination register, the top bit is lost, and the actual result is 0x000110.
As a result, we can see that a carry is produced. CY will therefore equal 1.
The registers will be updated with the hexadecimal integers.
As a result, we can observe that no carry is produced. CY will therefore equal 0.
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Which of galileo’s astronomical observations were best explained by a heliocentric model?.
Galileo’s astronomical observations that were best explained by a heliocentric model is "The phases of Venus can only occur the way they do if Venus is orbiting the Sun".
What about the heliocentric model was accurate?
Instead of Earth, as was previously thought to be the case according to the geocentric model, the heliocentric concept puts the Sun at the core of the solar system. Our increased grasp of astronomy was built on this advancement, which brought us closer to the true nature of the solar system and the universe.
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What is the name of the temperature zone that includes the equator? How many degrees of latitude does this zone cover zone? I have to get it done right now
The name of the temperature zone that includes the equator is Zone C and is referred to as the tropical zone.
What is Tropical zone?This is referred to as the type of zone which is characterized by areas or regions around the equator. The name tropical was coined from its distinct climate which is usually warm all year round as a result of its very high sun exposure.
The degrees of latitude which this zone covers is 23.5 degrees and is south of the Equator which is therefore the reason why it was chosen as the most appropriate choice.
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What is the wavelength of light emitted when an electron relaxes from the n = 5 level to the n = 2 level?
The wavelength released in transition energy is 4.23 x 10¯⁶ m.
We need to know about transition energy to solve this problem. Electrons in a hydrogen atom can move to another level of energy. It is also called a transition. In this process, electrons will absorb or release their energy to move. The transition energy can be determined as
ΔE = E2 - E1
where ΔE is transition energy, E2 is the final state of energy and E1 is the initial state of energy.
The state energy of a hydrogen atom can be calculated by
E = -(13.6) / n² eV
E = h.c / λ
where n is the number of energy states, h is Planck constant (4.136 x 10¯¹⁵ eV/Hz), c is speed of light (3 x 10⁸ m/s) and λ is wavelength.
From the question above, we know that
n1 = 5
n2 = 2
By substituting the following parameter, we get
ΔE = E2 - E1
ΔE = -(13.6) / n2² - (-(13.6) / n1²)
ΔE = -(13.6) / 2² - (-(13.6) / 5²)
ΔE = 0.544 - 0.85
ΔE = -0.306 eV
the energy is minus because it got released.
Calculate the wavelength released
ΔE = 0.306 eV
h.c / λ = 0.306 eV
4.136 x 10¯¹⁵ . 3 x 10⁸ / λ = 0.306
λ = 4.23 x 10¯⁶ m
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A 2.5 l flask at 15 c contains a mixture of 0.32 mol of n2, 0.15 mol he, and o.42 mol of ne. calculate the total pressure
The total pressure is 0.89 atm of the flask containing a mixture at 15° C
What is pressure?The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.
IT is defined as the amount of force exerted per area , so to make a large amount of pressure one can exert a large force or exert a small force for smaller area , it's S.I unit is pascal
total pressure = sum of all the partial pressure
So total pressure (Ptotal ) = partial pressure of N2 + partial pressure of He + partial pressure of Ne
= (0.32 + 0.15 + 0.42) atm.
= 0.89 atm
So Ptotal = 0.89 atm.
the question is a bit incorrect,
the temperate of the flask is actually 158° C.
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What is the magnitude of an electric field that balances the weight of a plastic sphere of mass 7.4 g that has been charged to -3.0 nc?
It is a physical field occupied by a charged particle on another particle in its surrounding .The magnitude of electric field will be -0.0241 MN/C.
What is electric field?
A physical field called an electric field surrounds electrically charged particles and attracts or repels all other charged particles nearby. It can also refer to the physical field surrounding a system of charged particles. Electric charges and time-varying electric currents are the building blocks of electric fields. The electromagnetic field, one of the four fundamental interactions (also known as forces) of nature, manifests itself in both electric and magnetic fields.
The electric force in an electric field is given by the equation,
[tex]E = \frac{F}{Q}[/tex]
Since electric field is balanced by the weight of the plastic sphere, the electric force is equal to weight of the sphere.
[tex]F = mg[/tex]
So the equation becomes
[tex]E = \frac{mg}{Q}[/tex]
Putting the value from the question,
m = 0.0074 kg
Q = (-3.0) Nc
g (gravitational acceleration) = 9.8 m/s^2
So, we get
[tex]E = \frac{(9.8)(0.0074)}{(-3.0)}[/tex]
[tex]E = -0.0241 MN/C[/tex]
Hence, the electric field is -0.0241 MN/C.
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My cat can eat 125 grams of food each day. How many kilograms is this?
0.125 kg
Explanation:
Which term best describes a copper wire?
O a conductor
O a circuit
O a magnet
O an insulator
A ball rolling down a hill for 9 seconds accelerates from 3 m/s to 34.5 m/s
Acceleration of a ball rolling down hill, a = 3.5 m/s².
Equation :Given in details,
Initial velocity of ball,
u = 3 m/s
Final velocity of ball,
v = 34.5 m/s
Time taken for changing velocity,
t = 9 s
To find acceleration of ball,
a =?
Using formula,
First equation of motion
v = u + a t
where,
v is final velocity,
u is initial velocity,
t is time taken
a is acceleration
Using this first equation of motion,
v = u + a t
34.5 = 3 + a × 9
34.5 - 3 = 9 a
31.5 = 9 a
a = 31.5 / 9
a = 3.5 m/s²
What is motion first law?Newton's first law: the law of inertia
According to Newton's first law, if a body is at rest or moving in a straight line at a constant speed, it will continue to move at that speed or remain at rest until acted upon by a force.
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I'm stuck. don't know how to solve this
Since motion under gravity only act on the vertical component of the velocity, the answer for both vertical and horizontal variables are;
a.) 9.8 m/s², 0
b.) 0, 18 m/s
c.) 21.2 m/s, 0
d.) 23 m, 39 m
e.) 2.2 s
Motion Under GravityMotion of any object under gravity is the vertical motion of the object under the influence of acceleration due to gravity.
From the question, the following parameters are given.
Height h = 23 mInitial velocity u = 18 m/sa.) The vertical acceleration will be equal to acceleration due to gravity which is equal to 9.8 m/s². While the horizontal acceleration will be equal to zero.
b.) The vertical initial velocity is zero. Vertically, it will be assumed that the stone is dropped. While the given initial velocity is the horizontal initial velocity which is 18 m/s
c.) The vertical final velocity V can be calculated by using the formula
V² = U² + 2gH
V² = 0 + 2 × 9.8 × 23
V² = 450.8
V = √450.8
V = 21.23 m/s
Motion under gravity only act on the vertical component of the velocity. so, horizontal final velocity is equal to zero.
d.) Vertical distance = 23 m
While the horizontal distance = Range = ut
e.) Both the vertical and horizontal time will be the same. We can calculate the time by using the formula
h = ut + 1/2gt²
Vertically, u = 0
23 = 0 + 1/2 × 9.8 × t²
23 = 4.9t²
t² = 23/4.9
t² = 4.694
t = √4.69
t = 2.166 s
t = 2.2 s
so, the range = 18 × 2.166 = 38.997 m
Therefore, the time taken is 2.2 and the range is approximately 39 m.
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The big o notation of the worst case scenario of pushing back an element into a queue implemented using a list is _______________
The big o notation of the worst-case scenario of pushing back an
element into a queue implemented using a list is Array or a Linked list.
What is an array?
A queue could be implemented as an array or a linked list with very different insertion, removal, and indexing characteristics.In computer science, an array is a data structure consisting of a collection of elements, each identified by at least one array index or key. An array is stored such that the position of each element can be computed from its index tuple by a mathematical formulaThe array in C has a fixed size, which means that once the size is specified, it cannot be changed; you cannot shrink or expand it. The rationale behind this was that, when expanding, we cannot always be certain that we will receive the subsequent memory location for free (it is not always possible). The array is memory statically allocated when it is declared, making it impossible to shrink because only the compiler has the power to do so.The first element of the array is indexed by the subscript 0, for zero-based indexing; by the subscript 1, for one-based indexing; and by the subscript n, for N-based indexing. An array's base index can be chosen at will. Negative index values are typically permitted in programming languages that support n-based indexing, and other scalar data types, such as enumerations or characters, may also be used as array indexes.
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HII please help me with this question!
"Which is smaller, a water molecule or a skin cell?"
Thank You
URGENT : need this for tmmr
2.2cm^3
As per the statement the given measurement of different volumes
Let consider
V1 = 2.1cm^3
V2 = 2.1cm^3
V3 = 2.4cm^3
Now, we are supposed to find the mean value
mean value = submission of total number observation÷ sum of no. of observation
mean value = 2.1+2.1+2.4÷ 3
mean value = 6.6÷3
mean value= 2.2cm^3
The central tendency of data is measured by the term "mean." It is a value that, in general, may be used to express the primary value of a group of data. It is determined by adding up all of the data set's observations and dividing the result by the total number of observations.To know more about mean value visit : https://brainly.com/question/12513463
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005 (part 1 of 2) 10.0 points
A runner is jogging in a straight line at asteady v, 4.1 km/hr. When the runner is L= 7.1 km from the finish line, a bird begins
flying straight from the runner to the finish line at = 12.3 km/hr (3 times as fast as the runner). When the bird reaches the finish line, it turns around and flies directly back to the runner.
86.925 km
1=runner v1= 4.1km/h = 1.13m/s, here v1 and v2 is velocity
2=bird v2=12.3km/h = 3.41 m/s
bird covers 7100 m in t=7100/3.41=2082 s
at same time runner has traveled x=1.13 * 2082=2352.6
the remaining distance of 7100-2352=6865 m is traveled by runner an bird
6865=v1t+v2t
then t=6865/(1.13+3.41)=23410 s
the distance traveled by bird is
x2=7100+v2t
=7100+3.41*23410
x2=86928m = 86.925 km
Linear velocity is the measurement of a body's "pace of change of displacement in relation to time" when the body is travelling along a straight route.Velocity may be divided into two categories: linear velocity and angular velocity. The rate at which the displacement of a body travelling along a straight route changes is known as its linear velocity. Any moving item will undoubtedly have a linear velocity.To know more about velocity visit : https://brainly.com/question/12844889
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A popular website is interested in conducting a survey of 400 visitors to the website in such a way that 200 of them will be under age 30, 150 will be:_________
aged 30-55, and 50 will be over 55.
150 will be: stratified sample.
The partitioning of a population into smaller subgroups known as strata is a key component of the sampling technique known as stratified random sampling. In stratified random sampling, also known as stratification, the strata are created based on the shared traits or features of the members, such as wealth or level of education. Numerous uses and advantages of stratified random sampling include examining life expectancy and population demography.
Proportional or quota random sampling are other names for stratified random sampling. Researchers can produce a sample population that most accurately represents the whole population under study using stratified random sampling. Sampling is the process of drawing conclusions about a population using a small sample.
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A group of college students eager to get to Florida on a spring break drove the 675-mi trip with only minimum stops. They computed their average speed for the trip to be 57.4 mi/h. How many hours did the trip take?
Answer: 11.76 hours
Explanation:
I have attached an image explaining the answer
The acceleration due to gravity on planet X is
one-fifth that on the surface of the earth.
If it takes 3.8 s for an object to fall a certain
distance from rest on earth, how long would
it take to fall the same distance on planet X?
Answer in units of s
The time taken for the object to fall the same distance in planet X is determined as 8.5 seconds.
Time of motion of the object planet X
The time taken for the object to fall the same distance on planet X is calculated as follows;
t = √2h/g
where;
h is height of fallg is acceleration due to gravityt is time of motiont² = 2h/g
gt² = 2h
g₁t₁² = g₂t₂²
t₂² = g₁t₁²/g₂
t₂² = (g₁ x 3.8²) / (0.2g₁)
not e one-fifth = 1/5 = 0.2
t₂² = 72.2
t₂ = √72.2
t₂ = 8.5 seconds
Thus, time taken for the object to fall the same distance in planet X is determined as 8.5 seconds.
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A basketball player, standing near the basket to grab a rebound, jumps 74.8 cm vertically. how much time does the player spend in the top 13.7 cm of his jump?
By using uniform motion, in 0.04 second the player will spend in the top 13.7cm .
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
hmax = 74.8 cm = 0.748 m
h = 13.7 cm = 0.137 m
g = 9.8 m/s²
Find the initial speed by using hmax (vt = 0 m/s)
vt² = vo² + 2a . s
0² = vo² - 2g . hmax
2 . 9.8 . 0.748 = vo²
vo² = 14.6608
vo = 3.83 m/s
Find the vt when h is 13.7 cm
vt² = vo² + 2a . s
vt² = 3.83² - 2g . h
vt² = 3.83² - 2. 9.8 . 0.137
vt² = 11.98
vt = 3.46 m/s
Find the time taken
vt = vo + a . t
3.46 = 3.83 - g . t
9.8t = 0.37
t = 0.04 second
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If 720- nm and 660- nm light passes through two slits 0.61 mm apart, how far apart are the second-order fringes for these two wavelengths on a screen 1.5 m away?
The distance between the second-order fringes for these two wavelengths is 0.3 × 10—³ m.
The wavelength of first light is,
[tex]λ _{1} = 720 \: nm = 720 \times 10 ^{ - 9} \: m[/tex]
The wavelength of the second light is,
[tex]λ _{1} = 660 \: nm = 660 \times 10 ^{ - 9} \: m[/tex]
The separation is d.
d = 0.61 mm
[tex]d = 0.61 \times 10 ^{ - 9} \: m[/tex]
The distance of the screen is D.
D = 1 m
For wavelength 1 the distance of the second fringe is,
The number of fringes is 2.
[tex]x _{n} = \frac{nλD}{d} [/tex]
[tex]x _{2} = \frac{2 \times 720 \times 10 ^{ - 9} \times 1.5}{0.61 \times 10 ^{ - 3} } [/tex]
[tex] = 3.5 \times 10 ^{ - 3} [/tex]
For wavelength 2 the distance of the second fringe is,
[tex]x ^{'} _{n} = \frac{nλD}{d} [/tex]
[tex]x ^{'} _{2} = \frac{2 \times 660 \times 10 ^{ - 9} \times 1.5}{0.61 \times 10 ^{ - 3} } [/tex]
[tex]x ^{'} _{2} = 3.2\times 10 ^{ - 3} [/tex]
The distance between the second-order fringes for these two wavelengths on a screen 1.5 m away is,
[tex]∆x = x _{2} - x ^{'} _{2} [/tex]
[tex] = (3.5 \times 10 ^{ - 3} - 3.2 \times 10 ^{ - 3} )[/tex]
[tex] = 0.3 \times 10 ^{ - 3} \: m[/tex]
Therefore, the distance between the second-order fringes for these two wavelengths is 0.3 × 10—³ m.
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Which statements correctly describe the effect of distance in determining the gravitational force and the electricall
force? Check all that apply
The gravitational force has an infinite reach
The electrical force has an infinite reach
The gravitational force is inversely proportional to the distance.
The electrical force is inversely proportional to the distance.
The gravitational force is inversely proportional to the square of the distance.
The electrical
force is inversely proportional to the square of the distance.
O
O
Save and Exit
The square of the distance has an adverse relationship with the electrical force.
The square of the distance has an adverse relationship with the gravitational force.
Electrical force vs gravitational force :The fundamental distinction between electrostatic and gravitational forces is that gravitational force is the force that draws objects to the earth based on mass. This force is conservative. While an object's electrostatic force is its force as a result of charge. Moreover, it is a conservative force.
How would you define an electrical force?Electric force is the attractive or repulsive interaction between any two charged bodies. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so.
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A projectile is launched from ground level at an angle of 15 degrees above the horizontal. It lands a distance of 20 meters from the launcher. Which of the following launch angles would result in the same range if the launch speed is kept the same?
A. 60 degrees
B. 30 degrees
C. 75 degrees
D. 85 degrees
C. The launch angle that would result in the same range if the launch speed is kept the same is 75⁰.
Angle of projection
The angle of projection is calculated as follows;
R = u²sin(2θ) / g
where;
θ is the angle of projectionθ = 15⁰
sin 2θ = sin 2(15) = sin (30) = 0.5
Equivalent angle of projectionθ = 90⁰ - 15⁰ = 75⁰
sin(2θ) = sin (2 x 75⁰) = sin (150⁰) = 0.5
Thus, the launch angle that would result in the same range if the launch speed is kept the same is 75⁰.
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how much force is required to accelarate 2kg mas at 3m/s 2
Answer:
6 Newton.
Explanation:
Force (F) = Mass (M) x Acceleration (A).
Force = 2kg x 3 m/s^2
F = 6kg m/s^2 = 6 Newton. = 6N
Therefore, Force required to accelerate the body is 6N
The volume of ammonia gas at 0.920 atm of pressure is gradually decreased from 80.3 ml to 46.9 ml. what is the final pressure of ammonia if there is no change in temperature?
The final pressure of ammonia if there is no change in temperature is 1.575atm.
A given mass of gas has a pressure that is inversely proportional to its volume at constant temperature. The gas rules of Boyle are followed in this query.
The mathematical notation is as follows:
[tex]P_{1} V_{1} = P_{2} V_{2}[/tex]
Rearranging the formula so that pressure [tex]P_{2}[/tex] is the formula's subject;
[tex]P_{2} = \frac{P_{1}V_{1} }{V_{2} }[/tex]
Plugging in the values we get:
[tex]P_{2} = \frac{(0.920)(80.3)}{(46.9)}[/tex]
[tex]P_{2} = 1.575atm[/tex]
Therefore, the final pressure of ammonia if there is no change in temperature is 1.575atm.
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