easy 8th grade question plz help

Answer:

The independent variable is the number of dry cells and the dependent variable is the time the bulb works.

Explanation:

In this exercise, you are asked to analyze the variables derived from Ómar's hypotypeis

  "If more dry cells are connected end-to-end, a light bulb will work longer because more energy is available."

In this hypothesis, the independent variable that is controlled by the researcher is the number of batteries to be connected in series.

The dependent variable that is measured by the researcher is how long the bulbs last.

When reviewing the different answers, the correct one is:

The independent variable is the number of dry cells and the dependent variable is the time the bulb works.

Answer:

It is A.

Explanation:

I did the test on Edg.

Answer:

A

Explanation:

Answer: C

Explanation: Because if magma wasn't to be forced on earth's surface, the magma would come on earth and burn earth down.

Accelerator mass spectrometers are used in modern isotope counting.

So, option B. is correct.

Isotopes are two or even more kinds of atoms with the same atomic masses but differing nucleon numbers leading to varying numbers of neutrons within their nuclei.

Accelerator mass spectrometry would be a type of mass spectrometry in which ions are accelerated to extremely high kinetic energy before being analyzed for mass.

Accelerator mass spectrometers are used in modern isotope counting.

Option B. is correct.

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The forces, act upon the block which  is at rest on an inclined plane, are:

Two surfaces that come into contact and glide against one another produce frictional force.

When  the block is on an inclined plane, its weight is acting downwards for force of gravity, the surface on the plane acts an upward force named normal force. But to become it rest, a resistive frictional force acts on it. Hence, the  forces, acts upon the block, are:

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Answer:

A seesaw

Explanation:

Answer:

a seesaw

Explanation:

Answer:

time and cost

Explanation:they have to pay for the pizza and take time to eat it

Answer:

B: Family and Friends

Explanation:

According to the class I had on this a few years ago, I can confirm that this was the answer.

My answer would be this because you are socializing with friends (according to the question) and you would just select it automatically due to background knowledge.

Hope I helped! ☺

Answer:

yes it is possible, you have to lay down flat on your back

brainliest pweaseee

Answer:

Yes (and no)

Explanation:

Hey! This according to my theory is possible, the g-force of an object or "elevator" (in your explanation) is accelerating as it's gravitational pull is getting stronger. So it would but wouldn't be possible in a small elevator, because you-know it's an elevator (and of course you would bump your head, ouch!) ; p !

But if you had free or spare space to use, then you can jump upwards at the last second to cancel out the gravitational pull as if you actually (or originally) jumped from this height. But the gravitational pull may be too strong for those of humans, if the person acquiring and accelerating in G-Force doesn't have good leg muscle then he may be pulled along with the object by the gravitation.

I hope this helped! Pls Brainliest my answer! It would mean and help a lot! ; )

Answer:

diabetes

Explanation:

hope it helps

Answer:diabetes

Explanation:

common sense

Answer:

X0   is the initial position of the object

V0 t   is the displacement of the object in time t due to its initial velocity

1/2 a t^2   is the displacement of the object in time t due to its acceleration

Adding the 3 terms (being careful with signs) gives the final position of the object at time t

Answer:

B: Distance and amount of charge

Explanation:

I am taking the quiz and this is the correct answer!

Electric potential depends on Distance and amount of charge.

The electric potential is defined as the amount of work needed to move a unit of electric charge from a reference point to the specific point in an electric field.

For any charge located in an electric field its electric potential depends on the type (positive or negative), amount of charge, and its position in the electric field.

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Answer:

A. The car does not land in the river

B. 399.27 meters

Explanation:

The Cliff Height, s: 609.6 m

The velocity at the edge of the cliff, vₓ = 40.3 meters/second  (90 miles per hour)

The location of the Colorado River = 536.5 meters (1,760 feet) from the cliff base

The width of the river across = 300 feet average

The depth of the river = 40 feet

Assumption;

The direction of the vehicle = Horizontal

Vertical velocity of the vehicle = 0 m/s

The time, t, it takes the car to reach the level of the bottom of the cliff is given as follows;

s = [tex]u_y[/tex]·t + 1/2·g·t²

Where;

[tex]u_y[/tex] = The initial vertical velocity of the vehicle = 0

g = The acceleration due to gravity = 9.81 m/s²

Therefore, we have;

609.6 = 0×t + 1/2 × 9.81 × t²

609.6 = 1/2 × 9.81 × t²

t = √(2 × 609.6/9.81) ≈ 11.148 seconds

The horizontal distance, x, travelled by the car in the above calculated, 11.148 seconds, time is x = vₓ × t = 40.3 × 11.148 = 449.27 meters

Therefore, the horizontal distance from the cliff travelled by vehicle on landing from the base of the cliff = 449.27 meters

Given the river is located approximately 536.5 meters from cliff's base, the car does not land in the river

B. In order for the car to land 50 ft. from the edge of the river, the river has to be 449.27 - 50 ≈ 399.27 meters from the base of the cliff.

The answer would be true

I got y = 0.94427191  and y = -16.944272. Not sure if right tho.

I did  [tex]{k q_1 \over y^2} &= {k q_2 \over (2-y)^2}[/tex], put the known in and solved it.

Answer:

Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems.

Explanation:

This is what your experiment was intended to demonstrate or investigate. "As temperature rises, honey's viscosity falls."

The experiment appears to investigate the relationship between honey viscosity and temperature, and after reading the question.

You must look at your experimental results here; it's likely that you discovered that viscosity does indeed drop as the temperature rises.

The final task at hand is to list the challenges and issues you encountered throughout the experiment and make suggestions for how to address them in order to conduct future experiments that are more successful.

Therefore, the temperature has a considerable influence on viscosity, however, the particular substance also affects this relationship.

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Answer:

7

Explanation:

Answer:

The term ideal machine refers to a hypothetical mechanical system in which energy and power are not lost or dissipated through friction, deformation, wear, or other inefficiencies. Hope this helped :))

Explanation:

Answer: the force applied to the object and the distance the object move Work can be calculated with this equation: Work equals Force x Distance.

Explanation:

Answer:

c.) magnetosphere

Explanation:

I think is C

Answer:

The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s is 18 m/s

Explanation:

Given that the mass of the dog = 5.0 kg

The mass of the pig = 30 kg

The speed with which the pig is walking = 3.0 m/s

We have that linear momentum = Mass × Velocity

Therefore, the momentum of the pig, m₁ = 30 kg × 3.0 m/s = 90 kg·m/s

m₁ = 90 kg·m/s

The momentum of the dog m₂ = Mass of the dog × Velocity of the dog

Given that m₁ is to be equal to m₂, we have;

m₁ = 90 kg·m/s = m₂ = Mass of the dog × Velocity of the dog

90 kg·m/s = m₂ = 5.0 kg × Velocity of the dog

m₂ = 5.0 kg × Velocity of the dog = 90 kg·m/s

5.0 kg × Velocity of the dog = 90 kg·m/s

Velocity of the dog = 90 kg·m/s/(5.0 kg) = 18 m/s

The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s = 18 m/s.

Answer:

wouldn't it be 17km?

Explanation:

Since its 10km and 7km it would make 17km in total. sorry if this didnt help i suck at this stuff :/

The strong force is that force which cause the basic pieces of an atom to hold together. The weak force is radiation; this force is instrumental in things decaying. Electro-magnetism is the charged field which surrounds iron based materials or objects.

Force make objects movable and to change their state. Various kinds of forces in nature balances altogether every processes in nature. The energy we gain or lost is due to some kind of force and resultant displacement.

Force is an external agent acting on an object to change its state of motion or to deform it. Force is a vector quantity and is characterized by its magnitude and direction. There are various kinds of forces such as gravitational force, magnetic fore, frictional forces, nuclear force etc.

Its due to gravitational force by earth  that we are standing on the ground. We experience a weight due to this effect. Similarly the rotating current in the earth core generates the magnetic force of earth.

Every objects need a force to change its state or rest or motion. Similarly, the work done in any fields is the result of any force applied on the system.

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Answer: 14 centimeters

Explanation: she walks 4 units east, 6 units up, then 4 units west. If each unit is 1 centimeter that is 16 centimeters.

Answer:

So if an object of mass m is raised through a height h, the work done on the object is equal to mgh, and so this amount of energy is transferred to the object. (Notice that this equation is identical to the one describing an object falling under gravity, Equation

Answer: I believe it would be "only velocity increases " because the mass is constant, if the velocity is increased, the kinetic energy must also increase.

Answer:

they both increase

Explanation:

kinetic energy is proportional to velocity squared. which mean if kinetic energy goes up the velocity goes up double as much and kinetic energy is exactly proportional to mass so as kinetic energy increases so does mass.

Answer:

0.616

Explanation:

hve a wonderful weekend :) stay safe

Answer:

Apply Newton's second law in the moving direction.

Explanation:

[tex]\begin{aligned}F &= ma\\5N-2N &= 25kg\times a\\a & = \frac{3N}{25kg}\\&= 0.12ms^{-2}\end{aligned}[/tex]

Friction force applies in the opposite direction of motion; as a restriction.

Answer:

47.43 m/s

Explanation:

Given that,

Final speed of a plane, v = 0

Distance, d = 180 m

Acceleration of the plane, a = -6.25 m/s² (deceleration )

We need to find the plane's velocity. Let it was u. So, using the third equation of kinematics as :

[tex]v^2-u^2=2ad\\\\u^2=0^2-2\times (-6.25)\times 180\\\\u=\sqrt{2250} \\\\u=15\sqrt{10}\ m/s\\ \\\text{or}\\\\u=47.43\ m/s[/tex]

So, the plane's velocity when it first touched the landing strip is 47.43 m/s.

Answer:

weight

Explanation:

the reason is because I am invteble