Answer:
hey there
the correct answer is option ( B ) population of interest
Explanation
A random sample is a subset of individuals randomly selected by researchers to represent an entire group as a whole. The goal is to get a sample of people that is representative of the larger population.
Explanation:
Hope it helps
Have a nice day : )
A product of photosynthesis which is a reactant in cellular respiration?
NADPH
Water
Carbohydrate
Answer:
A
Explanation:
water released then sunlight splits it into oxygen and hydrogen ions
A parallel plate air capacitor of value C, is charged to a potential V, between
the plates and +9, is charge on one plate. Separation between plates is d. A
dielectric of dielectric constant K = 3 fills the space between the plates. Which
of these quantities will change and why. (i) capacitance (ii) charge (iii) po-
tential difference and (iv) field density?
Answer:
(i) C=3Co
(ii) V=Vo/3
(iii) Decrease
Explanation:
(i) capacitance increase K times.
(ii) As charge remain constant so by using Q=CV
you will get potential decrease by K time.
(iii) Decrease due to induced electric field inside
dielectric material..
E=Eo-Eind
Explanation:
heyaaa hope it helps ☺️✌️
Brainilist If you solve these correctly!
20 points!!!
Answer:
To convert from denary to binary, start by subtracting the biggest place value you can from the denary number, then place a 1 in that place value column. Next, subtract the second biggest place value you can, and place a 1 in the column. Repeat this process until you reach zero.
Newton's Three laws talk about all of the following:
Inertia, Mass, Force, Acceleration, and Velocity.
Which of these five things is involed/relevent to all three laws? Explain why.
Identify the energy transformations for a gas fire
Answer:
The release of energy from fuels is used to make other forms of energy. When gasoline burns in a car engine, some of the chemical energy in the gasoline is converted into heat. The heat is converted into mechanical energy. The mechanical energy moves the car.
1*2+2+1+5 by how much?
Answer:
10
Explanation:
1*2+2+1+5=10
1x2+2+1+5=10
A wax is applied to the bottom surface of cross country skis to achieve a good balance between traction when
the skier needs to climb a small hill and speed on downhill slopes. The coefficients of both static and kinetic
friction between the waxed surface and snow increase as temperature decreases. If the temperature rises
during the day and the skier begins to slip backward on hills they should re-wax their skis with what type of
wax? (1 point)
A. One where the coefficient of kinetic friction is smaller
B. One where the coefficient of static friction is larger.
C. One where the coefficient of kinetic friction is larger
D. One where the coefficient of static friction is smaller
The defined friction force allows you to find which is the correct result for what type of wax you should use:
B. One where the coefficient of static friction is larger.
The friction force is a macroscopic force that opposes the relative movement of bodies, it is the sum of many interactions at the microscope level.
In general for solid bodies the expression of the out of friction is
[tex]fr = \mu N[/tex]
Where fr is the friction force, μ the friction coefficient and N the normal.
The friction coefficient can be of two types:
Static for when the relative velocity between the two bodies is zero. Dynamic when the relative velocity between the two bodies is different from zero.
In general, the dynamic coefficient is less than the static one.
In this case, as the temperature increases, the friction coefficient decreases, so the skier begins to slide downwards. To prevent this sliding, he must use a wax with a higher friction coefficient.
If you only want to stand on the hill, a wax with a static coefficient must be used, while standing if you want to advance on the hill you must use a wax with a dynamic coefficient since there is a relative movement between the skier and the hill.
Let's examine the different alternatives:
A. False. The friction coefficient must be higher, so that there is more friction force.
B. True. The friction increases and can be stopped on the hill and move up the hill.
C. False In this case, you can go up the hill, but if you stop, you can go back.
D. False. The coefficient must be higher, to increase friction.
Consequently we see that the only type of wax that will allow you to stand or advance on the hill is
B. A wax with a higher statutory coefficient.
In conclusion, using the defined friction force we can find the correct result for what type of wax to use is:
B. One where the coefficient of static friction is larger.
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Answer:
One where the coefficient of static friction is larger
Explanation:
what is so2..........
Answer:
so2 is Sulfur dioxide.
Harry cycles 8 kilometres in 30 minutes.
Calculate his average speed, in km/h
Answer:
[tex]\huge\boxed{\sf Average\ speed = 16\ km/hr}[/tex]
Explanation:
Given:
Distance = S = 8 km
Time = t = 30 minutes = 30/60 = 0.5 hours
Required:
Average Speed = ?
Formula:
Average speed = total distance covered / total time taken
Solution:
Average Speed = 8 / 0.5
Average speed = 16 km/hr
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Harry cycles 8 kilometers in 30 minutes and the Harry's average speed obtained is 6 kilometers per hour.
Given:
Total distance covered by the Harry= 8 kilometers
Total time is taken by the Harry= 30 minutes
Convert total time to hours, the total time taken is obtained as:
Total time (hours) = 30 minutes / 60 minutes/hour = 0.5 hours
The average speed of the Harry is given by:
Average speed = Total distance / Total time
Average speed = 8 km / 0.5 hours
Average speed = 16 km/h
Therefore, Harry's average speed is 16 kilometers per hour when Harry cycles 8 kilometers in 30 minutes.
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Explain how mass and distance affect gravity (and other non-contact forces for that matter)
Answer:
How Do Mass and Distance Affect the Force of Gravity Between Two Objects?
The force of gravity between two objects is determined by the mass of each object and the distance between their centers. Objects with a greater amount of mass will exert a greater degree of gravitational pull, but as the distance between two objects increases, the gravitational force between them lessens.
Explanation:
An example of the significance of distance in Newton's law is how a person's weight decreases when they are further away from the center of the Earth, such as in an orbiting space station. The gravitational force, experienced as weight, is decreased, even through the person's mass and that of the Earth remain the same.
A 200 kg object is pulled up a rough incline plane as shown in the picture above. The object accelerates at 1 m/s^2. Calculate the tension on the rope.
A. 1,136 N
B. 2,203 N
C. 712 N
D. 957 N
Answer:
Explanation:
μ = 0.05 is hardly a "rough surface", More like very slick ice. But OK
Forces acting parallel to the ramp with UP RAMP being positive direction.
F = ma
Tension minus weight minus friction will equal mass acceleration
T - mgsinθ - μmgcosθ = ma
T = m(a + g(sinθ + μcosθ))
T = 200(1 + 9.8(sin25 + 0.05cos25))
T = 1,117.14995
Which is closest to answer A.
Understand that answer precision to 3 or 4 significant digits as exampled by our solution options CANNOT be justified by input numbers with only a single significant digit as in this question.
In fact, we cannot get the 1136 N result unless we also use gravity to a single significant digit of 10 m/s²
An organism's genotype is ?
genotype is the complete set of genes in an living organism
Gravitational force depends on the mass of an object.
Place the items in order from MOST gravitational force (1) to LEAST gravitational force (5)
Atom
Capitol Building
Earth
Sun
human
1.
2.
3.
4.
5.
Answer:
sun, earth, capitol building, human, atom
Explanation:
Gravity is directly proportional to the size of an object. Therefore, the object with the most mass will have the greatest force of gravity. We know this from the equation. [tex]F = G\frac{m_1m_2}{r^2}[/tex]
A 100g object falls 5 meters. How fast do you determine it is moving when it hits the ground?
Answer:
Approximately [tex]9.9\; \rm m\cdot s^{-1}[/tex], assuming that this object started from rest, [tex]g = 9.81\; \rm m \cdot s^{-2}[/tex], and that air resistance on this object is negligible.
Explanation:
If the effect of drag on this object is negligible, the acceleration of this object would be constantly equal to [tex]g[/tex], the gravitational field strength ([tex]g \approx 9.81\; \rm m\cdot s^{-2}[/tex] near the surface of the earth.)
Since acceleration is constant, it would be possible to find the final velocity of this object using SUVAT equations.
Let [tex]v[/tex] and [tex]u[/tex] denote the final and initial velocity of this object, respectively. Under the assumption that this object started from rest, [tex]u = 0\; \rm m \cdot s^{-1}[/tex].Let [tex]a[/tex] denote the acceleration of this object. Under the assumptions above, [tex]a = g = 9.81\; \rm m\cdot s^{-2}[/tex].Let [tex]x[/tex] denote the displacement of this object. In this question, [tex]x = 5\; \rm m[/tex].The following SUVAT equation would apply:
[tex]v^{2} - u^{2} = 2\, a\, x[/tex].
Rearrange to find an expression for [tex]v[/tex]:
[tex]\begin{aligned}v^{2} &= 2\, a\, x + u^{2}\end{aligned}[/tex].
[tex]\begin{aligned}v &= \sqrt{2\, a\, x + u^{2}}\end{aligned}[/tex].
Substitute in the values [tex]u = 0\; \rm m\cdot s^{-1}[/tex], [tex]a = 9.81\; \rm m\cdot s^{-2}[/tex], and [tex]x = 5\; \rm m[/tex]. Evaluate the expression to find the value of [tex]v[/tex]:
[tex]\begin{aligned}v &= \sqrt{2\, a\, x + u^{2}} \\ &= \sqrt{2 \times 9.81\; \rm m\cdot s^{-2} \times 5\; \rm m} \\ &\approx 9.9\; \rm m\cdot s^{-1}\end{aligned}[/tex].
Therefore, under these assumptions, the velocity of this object would be approximately [tex]9.9\; \rm m\cdot s^{-1}[/tex] right before it hits the ground.
A parasitic plant with yellow, slender and branched stem is called.....
Explanation:
A parasitic plant with yellow, slender and branched stem is called Cuscuta (Amarbel).
hope this helps you.
The number of hours you spent studying each day
during the past week
I WILL MAKE BRAINLIEST, if any scamed I will Report him.
The weight of an object is 5 N. At a certain instant, its momentum is 6 kg m/s-¹ . Due to a force applied in the direction opposite of motion. the velocity is of the object decreased to 4 m/s-¹ during 4s. What is the force exerted on the object ?
You are riding a jet ski at 75 m/s and notice something in the water ahead of you. It takes you 10
seconds to slow down and come to a stop(0 m/s). What was your average acceleration?
Plz help!!!
Answer:
Im pretty sure its 7.5
Explanation:
your initial ( starting) velocity was 75. Your final velocity was 0. 75 / 0 = 0 m/s.
BUT you are calculating your acceleration, so it would be 75 - 0 divided by 10 = 7.5
The radius of a sphere is 2.00 m. What’s the surface area
S.A of sphere = 4πr²
r = 2m
S.A = 4π *4
S.A = 50.26m²
The surface area is 50.26m²
What is surface area?The surface area exists as the amount of space surrounding the outside of a three-dimensional shape.
The surface area of a solid object exists as a measure of the total area that the surface of the object settles.
The surface area of a figure (in square units) exists the number of unit squares it brings to cover the entire surface without gaps or overlaps. If a three-dimensional figure includes flat sides, the sides are named faces. The surface area exists as the total of the areas of the faces.
A radius of a circle or sphere exists in any of the line segments from its center to its perimeter, and in additional modern usage, it exists also its length.
S.A of sphere = 4πr²
r = 2m
S.A = [tex]4\pi *4[/tex]
S.A = 50.26m²
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A 6.8 KG object moves with a velocity of 8 M/S what’s it's kinetic energy?
Answer:
Explanation:
KE = ½mv² = ½(6.8)8² = 217.6 J
round as appropriate because that result is way too much precision for the inputs provided. Arguably should be 200 J based on the single significant digit of the velocity.
A circus performer juggling while standing on a tightrope suspended 18.0 m above the ground tosses a sword directly upward into the air with a speed of 5.0 m/s. If the sword leaves his hand 1.0 m above the tightrope, what is the sword's maximum height above the ground?
Answer:
Explanation:
let's use kinematics to solve for max height above the hand.
At the top of its arc, the sword has zero vertical velocity.
v² = u² + 2as
s = (v² - u²)/2a
s = (0² - 5.0²) / (2(-9.8))
s = 1.2755...m
call it 1.3 m
to this we must adjust for the height of the hand at release which is
18.0 + 1.0 = 19.0 m above ground
19.0 + 1.3 = 20.3 m above ground
Đồ thị hình vẽ biểu diễn sự biến thiên tốc độ của một vật chuyển động thẳng theo thời gian, biết góc = 300. Nếu khối lượng của vật là 20 kg thì hợp lực tác dụng vào vật có độ lớn là bao nhiêu ?
Cho e xin câu trả lời được không ạ?
Which statements are part of the safety protocol for this lab experiment? Check all that apply:
✓ Always wear a lab coat and safety goggles when performing an experiment
X Use caution when freezing fluids as they may expand
✓ Use the right gear, such as tongs and thermal mitts, to handle hot objects
✓ Check glassware, such as beakers and flasks, for cracks and chips prior to use
X Ear protection should be worn to protect against the loud noises associated with heat transfer
Answer:
Always wear a lab coat and safety goggles when performing an experiment
✓ Behavior in the lab needs to be purposeful. Exercise caution when using the hot plate, as it can cause burns.
X Ice used in this lab can melt quickly. Be sure to insulate your containers.
✓ Label your glassware and paper cups clearly and appropriately. Many chemicals appear to be the same.
✓ Check glassware, such as beakers and test tubes, for cracks and chips prior to use.
X A fume hood should be used to collect any potentially harmful vapors.
✓ Wear the right gear, such as chemically resistant gloves and oven mitts, when performing the experiment.
A, C, D, F
Which form of energy is used in a wind-up toy robot?
A- Chemical energy
B-Electrical energy
C-Heat energy
D-Mechanical Energy
Answer:
D. MECHANICAL ENERGY
SANA MAKA TULONG
Answer:
the answer is D
Explanation:
because I know it is D
if we assume that between birth and 2.5 y of age a child uses 3 diapers per day estimate total number of disposable diapers used per year in the us
Answer:4.38 X 10^10 diapers.
Explanation:
[3 diapers / 1day] X [365 day / year] X 1 year X 40million (rough guess of 1-2.5 year olds) = 4.38 X 10^10 diapers.
if we assume that between birth and 2.5 y of age a child uses 3 diapers per day then the total number of disposable diapers used per year in us would be 1095 diapers
What is multiplication?Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.
as given in the problem if we assume that between birth and 2.5 y of age a child uses 3 diapers per day
The number of diapers used in a day = 3
as there are 365 days in a year
The total number of diapers used in a year = 3×365
The total number of diapers used in a year = 1095 diapers
Thus, The total number of disposable diapers used in the United States each year would be 1095 diapers if we assume that a child uses 3 diapers per day between birth and 2.5 years of age.
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Jacob works in a store that sells jeans. Jacob is stacking a new delivery of jeans to display on top of the old jeans so that they are touching. In Stack 1, the top pair of jeans is larger than the bottom pair. In Stack 2, both pairs of jeans are the same size as the bottom pair in Stack 1. What does the different amount of energy mean for the temperature of all four pairs of jeans, and how will the two top pairs of jeans compare in temperature after a while? Why?
jacob first stack is 1
Answer:
help
Explanation:
me
If Bill threw a ball straight up on the Moon (g=1.6 m/s2) with a starting velocity of 22m/s from a cliff and it fell past him and reached a velocity of 56m/s as it impacted the Moon’s surface below the cliff, how long was the flight time?
Answer:
Write two important of physical state
Is this equation balanced? 2HCl + CaCO3 → CaCl2 + H2O + CO2
Answer:
Yes it is
Explanation:
the sum moles at the left side equals the sum of moles at the right side
What are two factors that determine
object's gravitational potential energy?
an
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Which of the following actions will keep the gravitational force between two objects unchanged?
Decreasing the mass of the objects
Increasing the temperature of the objects
Increasing the distance between the objects
Decreasing the distance between the objects
Answer:
increasing the temperature of the object