Answers
Answer:
meaning i dont know sorry
Related Questions
Sodium and ice a physical or chemical reaction
Answers
Answer:
physical change uwu owo hope this helps you uwu silly goose
please help meeeee :((((((((((
Answers
Answer:
hello me
Explanation:
help me thisanswer
PLEASE HELP I need help bad
66. Which of the following results of correlational
studies implies that environment contributes to
the determination of IQ?
(A) Correlations are higher for identical twins
than for fraternal twins.
(B) Correlations are higher for children and their
biological parents than for children and their
adoptive parents.
(C) Correlations are higher for parents and their
children than for husbands and wives.
(D) Correlations for two children in the same
family are lower when one of the children is
adopted than when both are the biological
offspring of the parents.
(E) Correlations for children and their adoptive
parents are statistically significant and
positive.
Answers
i think the answer is B.
i believe this because the child’s brain development is proven to have changed based off separation from their biological parents, presenting a change in their environment
i hope this helps ! ♡
Correlational study involves a non-experimental study of the relationship between two variables using statistical study in the evaluation of our result.
The association between environment and IQ in the options given is best identified by the statistical significance shown in the association between children and their adoptive parent.
Correlational study involves the establishment of statistical pattern or trend using methods such as Analysis of variance. Statistical evaluation is key in establishing the outcome of a correlational study or evaluation. Since the method by which the correlation between the variables in the other options aren't stated, the best option is E.Therefore, correlation between adoptive parent and children showing positive statistical significance implies a correlational study.
Learn more : https://brainly.com/question/17561092?referrer=searchResults
How many significant figures are in the number 54,100?
Answers
Answer:
3
Explanation:
In a chemical reaction, substances react in a specific ratio. Chemical reactions are used to make many products, including food. For a company that carries out a chemical reaction to make a product, why would it be important to know the ratio of substances?
Answers
Answer: “Chemical equations need to be balanced in order to satisfy the law of conservation of matter, which states that in a closed system matter is neither created nor destroyed. There are some things called mole ratios, which are important because mole ratios allow you change moles of a substance to moles of another substance. The mole ratio is the magic that changes from A to B. The mole ratios come from the chemical formula or equation.”
You need to make sure you have an equal balance so that you don’t make a mistake and mess up the reaction. If anything goes minutely wrong, it may alter the substance. Knowing the ratios of substances can help to make the product as expected.
It is important to know the ratio of substances because:
Mole ratios are important because mole ratios allow you change moles of a substance to moles of another substance. The mole ratio is the magic that changes from A to B. The mole ratios come from the chemical formula or equation.The mole ratios are determined using the coefficients of the substances in the balanced chemical equation. Mole ratios are used as a means of comparison of substances in a balanced chemical equation in order to determine amounts.Example: 2H₂ + O₂ → 2 H₂O
Learn more:
brainly.com/question/14197404
Cora’s doctor suspects that she has acid reflux. He prescribes
for her.
Answers
Answer: antacids
Explanation: Excess acid secretion in the stomach often causes nausea, chest pain, and leaves a bitter taste in the mouth. Doctors perscribe antacids to neutralize the acid.
Answer: antacids
Explanation: Excess acid secretion in the stomach often causes nausea, chest pain, and leaves a bitter taste in the mouth. Doctors perscribe antacids to neutralize the acid.
The Hall effect is to be used to find the sign of charge carriers in a semiconductor sample. The probe is placed between the poles of a magnet so that magnetic field is pointed up. A current is passed through a rectangular sample placed horizontally. As current is passed through the sample in the east direction, the north side of the sample is found to be at a higher potential than the south side. Make a sketch of the situation, then decide if the number density of charge carriers is positively or negatively charged.
Answers
Answer:
the sign of these carriers is POSITIVE
Explanation:
In the effect, he found the charge carriers that were subjected to two forces, one electric and the other magnetic.
F = F_e + F_m = q E + q v x B
bold indicates vectors
The electric field goes to the east, therefore the current also has this direction, the vector product of the velocity of the charge carriers towards the east and the magnetic field upwards, using the right hand rule a magnetic force is created towards the north if the carriers are positive.
In the exercise they indicate that the north side has a higher potential than the south side, therefore there must be an accumulation of carriers on this side that create an electric field (Hall) that is put to the magnetic force until reaching equilibrium when the total force is zero.
Therefore the sign of these carriers is POSITIVE
1. A ford engine is provided with 80,000 W power by burning its fuel. The engine produces a kinetic energy of 96 kJ for 20 seconds before its cut out.
a. Calculate the output power by the engine in watts.
b. What is the efficiency of the engine?
c. Why is there a considerable difference in the power input and output?
Answers
Answer: a) 4800 W b) 6 % c) most of the energy of fuel is converted to heat in combustion engine
Explanation: a) Power P = W/t = 96 000 J / 20 s = 4800 W
b) efficiency η = P(putput) / P(intake) = 4800 W / 80000 W = 0,06
The take-up reel of a cassette tape has a radius of 2.5 cm. Find the length of the tape that passes around the reel in 7.1 s when the reel rotates at an average angular speed of 1.9 rad/s.
Answers
Answer:
s = 0.337 m
Explanation:
First, we will find the angular displacement of the reel:
[tex]\theta = \omega t[/tex]
where,
θ = angular displacement = ?
ω = angular speed = 1.9 rad/s
t = time taken = 7.1 s
Therefore,
θ = (1.9\ rad/s)(7.1 s)
θ = 13.5 rad
Now, we will find out the length of tape:
s = rθ
where,
s = length of tape = ?
r = radius of reel = 2.5 cm = 0.025 m
Therefore,
s = (0.025 m)(13.5 rad)
s = 0.337 m
How much stronger is the electric force between two
protons than the gravitational force between them?
Answers
Answer:
Explanation:
The electric force between two protons is 10^36 times stronger than the gravitational force between them.
Answer:
Electric force is 1.23 x 10³⁶ times stronger than gravitational force.
Explanation:
First, we will calculate the gravitational force using Newton's Law:
[tex]F_G = \frac{Gm^2}{r^2}\\\\[/tex]
where,
F_G = Gravitational Force = ?
G = Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²
m = mass of proton = 1.67 x 10⁻²⁷ kg
r = distance between protons
Therefore,
[tex]F_G = \frac{(6.67\ x\ 10^{-11}\ Nm^2/kg^2)(1.67\ x\ 10^{-27}\ kg)^2}{r^2}\\\\F_G = \frac{1.86\ x\ 10^{-64}\ Nm^2}{r^2}\\\\[/tex]
Now, we will calculate the electrostatic force using Colomb's Law:
[tex]F_E = \frac{kq^2}{r^2}\\\\[/tex]
where,
F_E = Electrostatic Force = ?
k = Colomb's Constant = 9 x 10⁹ Nm²/C²
q = charge of proton = 1.6 x 10⁻¹⁹ C
r = distance between protons
Therefore,
[tex]F_E = \frac{(9\ x\ 10^{9}\ Nm^2/kg^2)(1.6\ x\ 10^{-19}\ C)^2}{r^2}\\\\F_E = \frac{2.3\ x\ 10^{-28}\ Nm^2}{r^2}\\\\[/tex]
Dividing both forces:
[tex]\frac{F_E}{F_G} = \frac{2.3\ x\ 10^{-28}}{1.86\ x\ 10^{-64}}[/tex]
F_E = 1.23 x 10³⁶ F_G
Therefore, electric force is 1.23 x 10³⁶ times stronger than gravitational force.
A heat engine operating between a pair of hot and cold reservoirs with respective temperatures of 500 K and 200 K will have what maximum efficiency?
A) 60%
B) 50%
C) 40%
D) 30%
Answers
Answer:
The maximum efficiency of the heat engine is 60%.
Explanation:
Given that,
The temperature of hot reservoir = 500 K
The temperature of cold reservoir = 200 K
We need to find the maximum efficiency. The formula for the efficiency of heat engine is given by :
[tex]\eta=1-\dfrac{T_c}{T_H}[/tex]
Put all the values,
[tex]\eta=1-\dfrac{200}{500}\\\\\eta=0.6[/tex]
or
[tex]\eta=60\%[/tex]
So, the maximum efficiency of the heat engine is 60%.
“Is it true or wrong to say that an automobile at rest can be accelerating very fast? Either yes or no explain it with mathematical background
Answers
Answer:
Yes.
a = dv/dt
but v might be zero in an instant.
Take the example of a pendulum.
Acceleration is defined as the rate of change of the velocity of the body. Yes, an automobile at rest can accelerate very fast.
What is acceleration?Acceleration is defined as the rate of change of the velocity of the body. Its unit is m/sec².It is a vector quantity. It requires both magnitudes as well as direction to define.
[tex]\rm a=\frac{dv}{dt}[/tex]
a is the acceleration of the body
dv is the change of velocity of the body
dt is the change in the time interval
The acceleration is defined as the change in velocity, and the slope of velocity is found as acceleration. It can be said that the body is at rest its velocity is zero.
The acceleration of the body can be increased when the body changes its direction. So the moment at which the body changes the direction the body is at rest after that the body can accelerate.
To learn more about acceleration refer to the link;
https://brainly.com/question/969842
8 A car accelerates at a rate of 10m/s
for a time of 4s and it reaches a speed of 52m/s . calculate the initial value
Answers
Answer:
From the First Law of Motion
Vf = Vi + at
"It reaches a speed of 52m/s" meaning the Final speed Vf=52
a(acceleration)=10m/s²
t=4s
Applying the formula
52=Vi + 10(4)
Vi = 52-40
Vi = 12m/s
a 60 kg pupil runs for 600m in 1 minute uniformly calculate kinetic energy
Answers
velocity = traveled distance ÷ time of the traveled distance is seconds
velocity = 600 ÷ 60
velocity = 10 m/s
_________________________________
Kinetic Energy = 1/2 × mass × ( velocity )^2
KE = 1/2 × 60 × ( 10 )^2
KE = 30 × 100
KE = 3000 j
its un1) It is unofficial, but a strong rumor that the world will end in two years' time due to the arrival of a huge comet and its subsequent impact with Earth. You have two years to live, to get the most out of life. How would you react? What would you do? Discuss.
Answers
Answer:
I'll try my utmost best to get the most out of life...I'd do the things have always wanted to do
Sometimes it might get to me knowing fully well that in two years time the world will end but i will shake it off because the time i spend thinking about it...It will be enough to make some memories.
Hope this help anyways
Draw Aufbua diagram of sodium ion
Answers
Answer:
Aufbau diagram of sodium ion:
2s²,2p⁶,3s¹
You throw a tennis ball straight up. Air resistance can be neglected.
(a) The maximum height above your hand that the ball reaches is H. At what speed does the ball leave your hand?
(b) What is the speed of the ball when it is a height H/2 above your hand? Express your answer as a fraction of the speed at which it left your hand.
(c) At what height above your hand is the speed of the ball half as great as when it left your hand? Express your answer in terms of H.
Answers
Answer:
(a) [tex]\sqrt{2gH}[/tex]
(b) [tex]\sqrt{gH}[/tex]
(c) [tex]\frac{3u^{2}}{8g}[/tex]
Explanation:
The maximum height = H
(a) Let the speed of the ball as it leaves the hand is u.
Use third equation of motion
[tex]v^{2}=u^{2}+2as\\0 = u^{2}- 2 gH\\u=\sqrt{2 gH}[/tex]
(b) Let the speed of the ball at H/2 is v.
Use third equation of motion
[tex]v^{2}=u^{2}+2as\\v^{2} = u^{2}- 2 g\frac{H}{2}\\v^{2}=2 g H - gH = gH\\v =\sqrt{gH}[/tex]
(c) Let the height is h.
[tex]v^{2}=u^{2}+2as\\\frac{u^{2}}{4} = u^{2}- 2 gh \\\\2 g h = \frac{3u^{2}}{4}\\h =\frac{3u^{2}}{8g}[/tex]
if 36C ofcharge pass through a write in 4s current is it carrying?
Answers
Answer:
The current flowing through the wire is 9 A.
Explanation:
Given;
quantity of charge passing through the wire, Q = 36 C
duration of the charge flow, t = 4 s
The current flowing through the wire is calculated as;
Q = It
I = Q / t
where;
I is the current flowing in the wire
I = 36/4
I = 9 A
Therefore, the current flowing through the wire is 9 A.
If a team of workers comes to a consensus, what probably happened in the meeting?
A. They compromised with each other to reach an agreement.
B. They disagreed and were unable to come to a decision.
OC. They were forced by their manager to follow a new policy.
O D. They all turned in their letters of resignation.
Answers
Answer:
A
Explanation:
A consensus is when you come to an agreement
The block A and attached rod have a combined mass of 50 kg and are confined to move along the guide under the action of the 796-N applied force. The uniform horizontal rod has a mass of 15 kg and is welded to the block at B. Friction in the guide is negligible.
Required:
Compute the bending moment M exerted by the weld on the rod at B. The bending moment is positive if counterclockwise, negative if clockwise.
Answers
Answer:
The bending moment is 459.16 N.m
Explanation:
From the given information;
Let's assume that the angle is 66°
Then, the free body diagram is draw and attached in the file below.
Now, the calculation of the acceleration from the first part of the free body diagram is:
[tex]\sum F_x = ma_x \\ \\ 796 - 50(9.81) sin 66=50a \\ \\ 796 - 448.094 = 50 a \\ \\ a = \dfrac{347.906}{50} \\ \\ a = 6.96 \ m/s^2[/tex]
Bending moment M:
From the second part of the diagram:
[tex]\sum M_B = mad \\ \\ M - (15 \times 9.81) (1.5) = (25 \times 6.96)(1.5 sin 66) \\ \\ M - 220.725 = 238.435 \\ \\ M = 238.435 + 220.725 \\ \\ \mathbf{M = 459.16 \ N.m}[/tex]
How do you make a mirages?
Answers
Answer: when the ground is very hot and the air is cool. The hot ground warms a layer of air just above the ground. When the light moves through the cold air and into the layer of hot air it is refracted (bent). A layer of very warm air near the ground refracts the light from the sky nearly into a U-shaped bend.
Explanation:
What would happen if I removed the battery from the circuit?
Answers
Answer:
The current would stop
Explanation:
Electric currents are interesting because they carry little to no momentum. As soon as you remove a power source, the whole current halts.
When we experience positive "g forces", it is as if we have become...
Answers
Answer:
heavier
Explanation:
A truck contains both hydraulic brakes (reliability 0.96) and mechanical brakes (reliability 0.99). What is the probability of stopping the truck (i) while moving at a high speed, assuming both systems must work to avoid hitting a vehicle stalled in the roadway, and (ii) while moving at a low speed, assuming either system will stop the truck in time if they function properly
Answers
Answer:
i) 0.9504
ii) 0.0452
Explanation:
Given data: reliability of hydraulic brakes= 0.96
reliability of mechanical brakes = 0.99
So the probability of stopping the truck = 0.96×0.99= 0.9504
At low speed
case: A works and B does not
= 0.96×(1-0.99) = 0.0096
case2 : B works and A does not
= 0.99×(1-0.96) = 0.0396
Therefore, probality of stopping = 0.0096+0.0396 = 0.0492
Kendra wonders how she ended up with brown hair, hazel eyes, and is right handed. Using the terms amino acids, genes, proteins, and traits, explain how she ended up with these features.
Answers
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A house is advertised as having 1460 square feet under roof. What is the area of this house in square meters?
Answers
Answer: 131.92 m
Explanation: The problem give above is a conversion problem. To convert any measurement from one unit to another, we need a relation for the original units to that of the desired unit. This relation is called the conversion factor. It is used by multiplying or dividing the factor depending on what is the unit of the original measurement. For this case, we need to convert from ft^2 to m^2. The conversion factor would be 1 foot is equal to 0.3048 m. So, we would be getting the square of the factor and then multiply to the original value.
1420 ft^2 ( 0.3048 m / 1 ft)^2 = 131.92 m
what makes molecules move. A. covection. B. Radiation. C. Thermal or heat. D. conduction.
Answers
Answer:
the answer is C
Explanation:
help PLEASEEEEEEEEEEE
Answers
Explanation : a
how are force and motion related
Answers
Even if it just pushing a piece of paper you still use force to put the paper in motion!
g You shine orange laser light that has a wavelength of 600 nm through a narrow slit. The slit forms a diffraction pattern on a distant screen that has been set up behind the slit. The first dark fringe in the diffraction pattern is 4.0 cm from the center point of the pattern. If you replace the orange laser with an unknown laser and observe that the second dark fringe of the diffraction pattern appear at 4.0 cm from the center point, what is the wavelength of the unknown laser
Answers
Answer:
λ = 3 10⁻⁷ m, UV laser
Explanation:
The diffraction phenomenon is described by the expression
a sin θ = m λ
let's use trigonometry
tan θ = y / L
as in this phenomenon the angles are small
tan θ = [tex]\frac{sin \ \theta}{cos \ \theta}[/tex] = sin θ
sin θ = y / L
we substitute
a y / L = m λ
let's apply this equation to the initial data
a 0.04 / L = 1 600 10⁻⁹
a / L = 1.5 10⁻⁵
now they tell us that we change the laser and we have y = 0.04 m for m = 2
a 0.04 / L = 2 λ
a / L = 50 λ
we solve the two expression is
1.5 10⁻⁵ = 50 λ
λ = 1.5 10⁻⁵ / 50
λ = 3 10⁻⁷ m
UV laser