PLEASE HELP IS URGENT


A current of 2A flows through a resistor for 30s.
(a) How many Coulombs of charge pass through in that time?
(b) Ifa total of 300J of energy are produced in that time, how many joules will be
produced when just 1C of charge passes?
(c) By referring to the definition of a volt, how great will be the p.d. in volts across the
resistor?​

Based on the information, we can infer that A. represents a Mitochondria.

Mitochondria is a term to refer to the eukaryotic cell organelles responsible for supplying most of the energy necessary for cell activity through the process called cellular respiration.

Based on the information, we can infer that the element that is labeled with the letter A is a mitochondrion because its location is that of a mitochondrion. In this case, the mitochondria is red, although in other models it can be represented with another color. In general, it is given this shape and this color to distinguish it from other elements of the cell.

Note: This question is incomplete. Here is the complete information:

Attached image

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Answer:

If the acceleration is constant, the movements equations are:

a(t) = A.

for the velocity we can integrate over time:

v(t) = A*t + v0

where v0 is a constant of integration (the initial velocity), for the distance traveled between t = 0 units and t = 10 units, we can solve the integral:

\(\int\limits^{10}_0 {A*t + v0} \, dt = ((A/2)10^2 + v0*10) = (A*50 + v0*10)\)

Where to obtain the actual distance you can replace the constant acceleration A and the initial velocity v0.

Answer:

Explanation:

Force = Mass * acceleration due to gravity.

Given

Mass of the paratrooper = 57kg

Acceleration due to gravity = 9.81m/s²

Required

Force pulling him down

Substitute unto formula;

F = 57 * 9.81

Force = 559.17 N

Hence the force pulling him down is 559.17N

The force pulling the paratrooper as he falls down is 558.6 N.

The given parameters;

The force pulling the paratrooper is force of gravity and the magnitude can be determined by applying Newton's second law of motion as shown below;

F = mg

F = 57 x 9.8

F = 558.6 N

Thus, the force pulling the paratrooper as he falls down is 558.6 N.

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The correct option is E

Explanation:

From the question we are told that

The velocity in the x direction is  \(v_x =  20 \ m/s\)

The velocity of the cap of the soda bottle in the y direction is  \(v_y  =  11 \  m/s\)

  Gnerally the speed of the cap as seen by the observer  is mathematically represented as

      \(v_c = \sqrt{v_x^2 + v_y^2}\)

=>    \(v_c = \sqrt{ 20^2 + 11^2}\)

=>    \(v_c = 22.83 \  m/s \)

=>    \(v_c = 23 \  m/s \)

Answer:

Copper atoms lose electrons to sulfur atoms

Explanation:

a p e x (:

Answer:

19

Explanation:

I legit did this and it took 19.

It is measured in the airless tube because  there is no air to offer resistance to the fall of the object.

The acceleration due to gravity refers to the acceleration that is imparted to a body because of its movement in the earth's gravitational field. Irrespective of mass, all objects move with the same acceleration in the earth gravitational field.

If air is present, air resistance makes it appear as if different masses are accelerated to different amounts. Thus, the acceleration due to gravity is measured in an airless tube the where there is no air to offer resistance to the fall of the object.

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Answer:

All of these

Explanation:

Have a great day!

Answer:

D

Explanation:

this is because the EMS is arranged according to all these factors, the most dangerous waves are the smallest

Complete question:

Consider the hypothetical reaction 4A + 2B → C + 3D

Over an interval of 4.0 s the average rate of change of the concentration of B was measured to be -0.0760 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 1.600 M?

Answer:

the final concentration of A is 0.992 M.

Explanation:

Given;

time of reaction, t = 4.0 s

rate of change of the concentration of B =  -0.0760 M/s

initial concentration of A = 1.600 M

⇒Determine the rate of change of the concentration of A.

From the given reaction: 4A + 2B → C + 3D

2 moles of B ---------------> 4 moles of A

-0.0760 M/s of B -----------> x

\(x = \frac{4(-0.076)}{2} \\\\x = -0.152 \ M/s\)

⇒Determine the change in concentration of A after 4s;

ΔA = -0.152 M/s  x 4s

ΔA = -0.608 M

⇒ Determine the final concentration of A  after 4s

A = A₀ + ΔA

A = 1.6 M + (-0.608 M)

A = 1.6 M - 0.608 M

A = 0.992 M

Therefore, the final concentration of A is 0.992 M.

Answer:

Neither the source or wall is moving so the sound takes 3 sec to get to the wall and 3 sec to return

D = 3 * v = 330 m/s * 3 sec = 990 m

The amount of time it takes for the moon to complete one full rotation around the Earth is the same as its period of one full rotation on its axis. Due to this, the EARTH ALWAYS SEE THE SAME SIDE OF THE MOON.

With an inclination of 23.45 degrees from the plane of its orbit around the sun, the Earth revolves on its axis in relation to the sun every 24.0 hours mean solar time. The differences brought on by the Earth's are averaged out to create mean solar time.

Rotation causes the day-night cycle, which in turn induces a cycle of temperature and humidity. As the world spins, the sea level rises and falls twice each day. The tidal range is determined by the gravitational pull of the sun and moon together

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The material that the magnet attracts is Iron and hence the ideal solution is option D.

The magnet is the material that produces the magnetic field on its own. The magnetic field is the invisible field but it has the ability to attract other materials. Magnets are made up of ferromagnetic materials.

Ferromagnetic materials are materials that are permanently magnetized due to the unpaired electrons in the materials. Most of the Ferromagnetic materials are metals namely nickel, iron, etc.

When the magnet is brought close to the iron, the electrons in the iron are aligned in the direction of the magnetic field which makes the iron become magnetized. Thus, the attraction takes place between two magnetized objects.

Thus, the ideal solution is option D) Iron.

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The dependent variable in this experiment is: D. the time for the blocks to hit the ground.

An experiment can be defined as a scientific investigation which typically involves the process of manipulating an independent variable (the cause), so as to determine or measure the dependent variable (the effect).

In every experiment, there are two (2) main types of variables and these include the following:

In this scenario, we can infer and logically deduce that the dependent variable in this experiment is the time for the blocks to hit the ground because it signifies the effect of the independent variable (three blocks).

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Complete Question:

A student drops three blocks from the same height and measures the time it takes for the blocks to hit the ground. Each block has a different mass.

What is the dependent variable in the experiment?

A. the volume of the blocks

B. the drop height

C. the mass of the blocks

D. the time for the blocks to hit the ground

A sample 7 size reflects less than 10 percent of the overall 100 population given. This suggests that the ten percent requirement has been satisfied. The requirement is met as a result.

a) According to the 10% criterion, each group (in this case, vowels and consonants) must make up at least 10% of the sample's total population. Since there are 56 consonants and 42 vowels in the sample, 42% of the population is represented by each category, or 42/100. Since 0.42 exceeds 0.1, the 10% requirement is satisfied.

b) The Normal condition mandates that, for high sample sizes, the sample proportion be roughly regularly distributed. The sample size in this instance is 7, which is insufficient to satisfy the criteria for a big sample size. As a result, in this instance, the Normal criterion is not met.

Regardless of the distribution of the population, the central limit theorem (CLT) states that the distribution of sample means approaches a normal distribution as the sample size increases. The CLT is frequently thought to hold for sample sizes equal to or larger than 30.

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A sample 7 size reflects less than 10 percent of the overall 100 population given. This suggests that the ten percent requirement has been satisfied. The requirement is met as a result.

a) According to the 10% criterion, each group (in this case, vowels and consonants) must make up at least 10% of the sample's total population. Since there are 56 consonants and 42 vowels in the sample, 42% of the population is represented by each category, or 42/100. Since 0.42 exceeds 0.1, the 10% requirement is satisfied.

b) The Normal condition mandates that, for high sample sizes, the sample proportion be roughly regularly distributed. The sample size in this instance is 7, which is insufficient to satisfy the criteria for a big sample size. As a result, in this instance, the Normal criterion is not met.

Regardless of the distribution of the population, the central limit theorem (CLT) states that the distribution of sample means approaches a normal distribution as the sample size increases. The CLT is frequently thought to hold for sample sizes equal to or larger than 30.

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From the histogram given, there were at approximately 7 downloads between 3pm and 4pm . This can be derived by counting the rows in that time period.

A histogram is a graph that depicts the frequency distribution of a few data points from a single variable.

Histograms frequently divide data into "bins" or "range groups" and count the number of data points that belong to each of those bins.

Histograms are frequently used to depict the key properties of data distribution in a handy format. It is especially beneficial when working with huge data sets (more than 100 observations). It can aid in the detection of uncommon observations (outliers) or gaps in the data.2

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Answer:

Option C, The object cannot be directly observed.

Explanation:The temperature of sun is extremely high due to which it is almost impossible to land on its surface and explore the depth of it. Thus a prototype of it is required to predict its probable internal structure and associated feature which effect our planet "earth".

This prototype/model is based on the deduction arrived after analyzing the  satellite information available in the form of  high resolution images.

Hence, option C is correct

Answer:

The answer is c the object cannot be directly observed.

Explanation:

I took the test and got it right.

The potential difference across the wire V = 0.10.

To find potential difference

Use formula,

V = IR

where,

V is potential difference

I is current

R is ressistance

Given,

I = 170 A

R = ?

So to first find R

R = ρLA

where,

ρ is the resistivity of the material

L is lenght

A is area of wire

given,

ρ = 1.72 x 10⁻⁸

L = 70 cm

A = 0.5 cm

So, putting value

R = (1.72 x 10⁻⁸) x 70 x 0.5

R = 60.2 x 10⁻⁸

Now using formula,

V = IR

V = 170 A x  60.2 x 10⁻⁸

V = 0.10

The term "resistivity" refers to a property that quantifies how much an object resists having current flow through it. It is a property of the material itself, independent of the size or shape of the sample, and is typically temperature-dependent, though it could also be pressure-dependent.

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The distance travelled by the vehicle around the circular track is 1,052.4 m.

The distance travelled by the vehicle in one complete cycle is calculated by using the following equation as show below.

d = 2πr

d = πd

Where;

In one complete cycle, the  vehicle will travel the circular track only once.

d = π(335 m)

d = 1,052.4 m

Thus, the distance travelled by the vehicle around the circular track is a function of the diameter of the circular track.

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The complete question is below:

A vehicle, starting from rest, accelerates on a circular track with a 335m diameter. What is the distance travelled by the vehicle when it makes one complete cycle?

Answer:

\(2 \\ because \\ 2 - 2 = 0 \\ 5 - 5 = 0\)

Answer:

The direction of magnetic field is along + Z axis.

Explanation:

The direction of motion of electron is along y axis.

The magnetic  force is along - X axis.

The force on the charged particle moving in the magnetic field is

\(\overrightarrow{F} = q (\overrightarrow{v}\times \overrightarrow{B})\\\\- F \widehat{i} = - q (v \widehat{j}\times \overrightarrow{B})\\\)

So, the direction of the magnetic field is along + Z axis.

Answer:

F = -4/5 W

Explanation:

We will do this exercise in parts, let's start with the data, The ball must be in balance

            B -W = 0

             B = mg                    (1)

where the thrust is given by Archimedes' principle

            B = ρ g V_liquid

In the problem we are told that the volume of the submerged body is 1/5 of the volume of the body, let's use the subscript 2 for the ball and the subscript 1 for the liquid

            V₁ = \(\frac{1}{5}\) V₂

if we use the concept of density for the body

            ρ₂ = m / V₂

            m = ρ₂ V₂

We can see that mass and volume are directly proportional, so we can use a rule of three to find the submerged mass. If mass M is in volume V₂ what mass is there in volume V₂ /5

             m₂ = \(\frac{V_{2} }{5} \frac{M}{V_{2} }\)

             m₂ = M / 5

we substitute in equation 1

             B = M / 5 g

This is the thrust that is an upward vertical force, therefore to submerge the whole ball we must apply a downward vertical force equal to the rest of the weight, the equilibrium condition in this case is

             B -W - F = 0

             F = B -W

             F = \(\frac{M}{5}\) g - M g

             F = -4/5 Mg

             F = -4/5 W

The negative sign indicates that the force is vertical down

In order to collect data to find an object's gravitational and inertial mass, meterstick and timer are two essential measuring devices that are needed.

Using the angular frequency value (w), inertial mass (m) is determined using the equation below:

w=√k/m

The equation above is solved for mass (m).

m=k/w²

To calculate the gravitational mass, following equation is used:

force gravity =  G  ×  M  ×  m / radius²

Where: mass, m, is 1 kilogram; mass of the Earth, M, is 6.0 × 1024 kilogram; the radius of the Earth (separation of masses), r, is 6.4 × 106 m; and G is 6.67 × 10⁻¹¹ newton square metrekilogram-2}.

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Explanation:

I have a lot to say it was very nice to meet my parents are u doing well I dont want too its been so much I love you so I was like u know I am not a man but you are the auditions I have been in a long long long life is a triangle and a chair for me and my parents think about the way I

Answer:

The ratio of the new potential energy to the potential energy before the insertion of the dielectric is 0.58

Explanation:

Given that,

Length of plates = 8 cm

Width = 5.52 cm

Distance = 1.99 cm

Dielectric constant = 2.6

Length = 4.4 cm

Potential = 0.8 V

We need to calculate the initial capacitance

Using formula of capacitance

\(C=\dfrac{\epsilon_{0}A}{d}\)

Put the value into the formula

\(C=\dfrac{8.85\times10^{-12}\times8\times5.52\times10^{-4}}{1.99\times10^{-2}}\)

\(C=1.96\times10^{-12}\)

We need to calculate the final capacitance

Using formula of capacitance

\(C'=\dfrac{\epsilon_{0}A_{1}}{d}+\dfrac{k\epsilon_{0}A_{2}}{d}\)

Put the value into the formula

\(C'=(\dfrac{8.85\times10^{-12}}{1.99\times10^{-2}})((4.4\times5.52)+(3.6\times5.52)2.6)\times10^{-4}\)

\(C'=3.37\times10^{-12}\)

We need to calculate the  ratio of the new potential energy to the potential energy before the insertion of the dielectric

Using formula of energy

\(\dfrac{E}{E'}=\dfrac{\dfrac{1}{2}CV^2}{\dfrac{1}{2}C'V^2}\)

Put the value into the formula

\(\dfrac{E}{E'}=\dfrac{1.96\times10^{-12}}{3.37\times10^{-12}}\)

\(\dfrac{E}{E'}=0.58\)

Hence, The ratio of the new potential energy to the potential energy before the insertion of the dielectric is 0.58

The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J

First, we shall list out the given parameters from the question. This is shown below:

The quantity of heat energy that must be transferred can be obtained as follow:

Q = MCΔT

= 2.25 × 394 × 220

= 195030 J

Thus, we can conclude quantity of heat energy that must be transferred is 195030 J

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Answer:

3.73m

Explanation:

What we are asked to find is the range covered by the fish. This is given by the following equation (1). Range can simply be defined as the horizontal distance covered by a body whose motion freely under gravity is in two dimensions. The motion of the fish is in two dimensions, the vertical dimension and the horizontal dimension.

\(R=\frac{u^2sin2\theta}{g}.........(1)\)

where u = 6.5m/s is the initial velocity, g is acceleration due to gravity which is taken as \(9.8m/s^2\) and \(\theta=30.0^o\).

Substituting these values into equation (1), we obtain the following;

\(R=\frac{6.5^2sin2(3)}{9.8}\\R=\frac{42.25sin60}{9.8}\\\\R=\frac{36.59}{9.8}\\R=3.73m\)

The range should be 3.73m.

A Chinook salmon can jump out of water with a speed of 6.50 m/s . The initial angle of =30.0°

The range refers to the horizontal distance i.e. covered by a body whose motion freely under gravity should be in two dimensions. It can be the vertical dimension and the horizontal dimension.

\(= 6.5sin^2\div 9.8\\\\= 36.59 \div 9.8\)

= 3.73m

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