If it takes the moon roughly 28 days to go once around earth, how many degrees must the moon move every day?

Answer:

High current flow

Explanation:

Generally , the measuring instruments used by technician also have some resistance, though its value is very low  . So when high current is present in the circuit , that current also passes through the instrument which creates a good potential drop across the instrument . So the external voltage used in the circuit measures less voltage .

(i)The time can be calculated using the equation:

\(d=v0t+1/2\)\(gt^{2}\)

\(v = 0 + 9.8 * 3.19 = 31.3 m/s\)\(t = sqrt(2d/g) = sqrt(2 * 50 / 9.8) = sqrt(10.2) = 3.19s\)

So the velocity of the car at the bottom of the hill is 31.3 m/s.

(ii)To find the height at which the car will have half this speed,

\(v = v0 + gt\)

\(t = (v - v0) / g = (15.65 - 0) / 9.8 = 1.59 s\)

\(d = v0t + (1/2)gt^2\)

where d is the distance traveled, v0 is the initial velocity

\(d = 0 * 1.59 + (1/2) * 9.8 * 1.59^2 = 12.1 m\)

So the car will have half the velocity at the bottom of the hill when it is 12.1 m below the top of the hill.

When an object moves under the influence of gravity, it experiences a constant acceleration due to gravity, which is approximately 9.8 m/\(s^{2}\) on the surface of the Earth.

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Answer:

male= sperm cell

female= egg cell

together= embryo

Explanation:

Answer:

1. sperm

2. egg

3. zygote

Explanation I took this test and these are the correct answers because the third one above is not right.

Answer:

Telescope, Probware, etc,..

Answer: probeware

Explanation:

the answer is probeware

if you mean by the options,

A. a ruler

B. a thermometer

C. a beaker

D. probeware

Answer:

the momentum is 50 kg m/s

Explanation:

The computation of the momentum is shown below;

As we know that

Momentum = mass × velocity

where

mass = 5 kg

And, the velocity is 10 m/s

So, the momentum is

= 5 × 10

= 50 kg m/s

Hence, the momentum is 50 kg m/s

Average speed is the total distance travelled in total time taken. Here, the total distance covered by the football player is 58.6m ad the average speed is 7.76m/s therefore, the time taken will be 7.55 sec.

What is Average Speed?

Average Speed is the rate at which the total distance is covered by an individual. It can be calculated by the formula:

Average Speed = Total distance travelled by an object ÷ Total time taken

Average Speed = 7.76 m/s

Total distance travelled = 58.6 m

Hence, time taken to cover the distance can be calculated by dividing the distance covered by the object by Average Speed of the object:

Time taken = 58.6 m ÷ 7.76 m/s

Time taken = 7.55 sec

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Answer:

true

Explanation:

No promises but I think its true :)

The temperature rise of the iron is 13.33°C

Calorimetry is the science of measuring the heat absorbed or evolved during the course of a chemical reaction or change of state.

The heat gained or released during a calorimetry procedure can be calculated as follows:

Q = mc∆T

Where;

According to this question, a 5kg block of iron with a specific heat capacity of 450 J/kg °C recieves 0.03 MJ of energy. The change in temperature can be calculated as follows:

30,000J = 5 × 450 × ∆T

30000 = 2250∆T

∆T = 30000 ÷ 2250

∆T = 13.33°C

Therefore, 13.33°C is the temperature rise.

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The mass of Jupitar is obtained from the calculations as 5.8 * 10^-14 Kg.

There are nine planets in the solar system and the sun lies at the enter of our solar system. This is the heliocentric model of the solar system.

Given that;

T^2 = GMr^3/4π

T = period

G = gravitational constant

r = radius

M = mass of Jupitar

Now;

1 day = 86400 seconds

1.77 days = 1.77 days *  86400 seconds/1 day

= 152928 seconds

Making M the subject of the formula;

M =4πT^2/Gr^3

M = 4 * 3.142 * (152928)^2/6.67 × 10^-11 * (422 × 10^9)^3

M = 2.9 * 10^11/5.0 * 10^24

M = 5.8 * 10^-14 Kg

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The energy that is transferred in this time is E = 1.365 J.

To calculate Charge using formula,

Q = I x t

Q = 0.13A x 35 s

Q = 4.55 C

To calculate energy transferred,

E = Q x V

where,

Q is charge

V is potential difference

So by given values,

E = 4.55  x 0.30

E = 1.365 J

In order to perform work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is a quantitative property. Energy is a conserved resource; according to the law of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.

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Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

Here is a screenshot of the answer:

(The second sentence is incorrect because the triangle should be a right triangle, not an isosceles one. The fifth sentence is incorrect because we use M cos g to calculate the horizontal component.)

The maximum speed the car weighing 1500kg and turning in a horizontal circle which has a radius of 20 meters can take the turn without skidding at 10.84m/s.

Maximum speed is the highest rate of speed that can be attained. Acceleration is the velocity, and because velocity has both a magnitude and direction associated with it, the acceleration changes when an object change the magnitude of their motion, the direction of their motion, or both of these.

Radius of the circular path, r = 20 m

Mass of the car, M = 1500 kg

Maximum speed of the car = v

The coefficient of friction, μ = 0.6

The centrifugal force will balance the friction force so that the car does not slip.

Therefore, mv²/r = μmg

v²/r = μg

v² = μgr

v = √(μgr)

v = √(0.6 × 9.8 × 20)

v = √(117.6)

v = √(294,000)​

v = √(117.6)

v = 10.84m/s

Therefore, the maximum velocity of the car is 10.84 meter per second.

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The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Most changes that encourage employees to become more ethical are targeted at encouraging ethical behavior.

Organizations can encourage ethical behavior among employees through various means. These include providing training and education on ethical principles, codes of conduct, and compliance policies. Such training can help employees understand the importance of ethical behavior and the potential consequences of unethical actions.

Creating a culture of transparency and accountability is another way to promote ethical behavior. This can be achieved by encouraging open communication, implementing whistleblower protection programs, and holding regular ethics training and discussions. Employees need to be confident that their concerns will be heard and addressed, and that they will not face retaliation for speaking up.

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The complete question is:

Fill in the blanks:

Most changes that encourage employees to become more ethical are targeted at ____________

The force of air resistance is approximately 3987 N.

Air resistance, also known as drag, is the force that opposes the motion of an object through a fluid (such as air). It arises from the interaction between the object and the fluid, and depends on factors such as the object's shape, size, speed, and the properties of the fluid (such as its density and viscosity). In the case of a helicopter flying horizontally, air resistance pushes against the direction of motion, and its magnitude is equal to the horizontal component of the lift force.

To find the force of air resistance, we need to resolve the lift force into its horizontal and vertical components. The vertical component equals the weight of the helicopter, which we can calculate using the formula:

Weight = mass x gravity

Assuming a mass of 4500 kg and a gravity of 9.81 m/s^2, we get:

Weight = 4500 kg x 9.81 m/s^2 = 44145 N

The horizontal component of the lift force equals the force of air resistance, since the helicopter is flying horizontally at constant speed. To calculate it, we can use the formula:

Force of air resistance = Lift force x sin(81.3°)

Substituting the given values, we get:

Force of air resistance = 40500 N x sin(81.3°) = 3987 N

Therefore, the force of air resistance is approximately 3987 N.

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The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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Answer: mirror neurons are the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood.

Explanation:

Answer:

Some psychologists think that you can trick your brain into feeling happy by acting happy. Acting happy might actually make one happy by mirror neurons. This is the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood. The three components of emotion are cognitive, physiological, and behavioral. There is actually some scientific evidence to suggest that smiling, even when you are not feeling happy, can make you happy. This idea is called the facial feedback hypothesis. Happiness, and smiling, can also be contagious and make others around them want to smile. People often mimic the facial expressions of others.

Explanation:

100% on Edge 2023!! You're welcome :) :) :) :)

Ready-mix concrete can typically remain in the mixer for up to two hours before it starts to set and harden, making it difficult or impossible to use. Correct choice is option c.

The setting and hardening of concrete is a chemical process that occurs when water is added to the dry mix of cement, sand, and aggregates. Once the mixing process starts, a chemical reaction begins that produces heat, causing the concrete to start setting and hardening.

In general, ready-mix concrete should be used as soon as possible after mixing to ensure that it retains its workability and strength. If the concrete remains in the mixer for too long, it may start to set and harden, making it difficult or impossible to use. Option c is correct answer.

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Answer:

Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.

Answer:

When waves travel from one medium to another the frequency never changes.

Explanation:

As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.

The refractive index of the new medium is approximately 1.59.

Snell's law relates the angles of incidence and refraction of light passing through a boundary between two media with different refractive indices (n). The formula is:

n₁ sin θ₁ = n₂ sin θ₂

where n₁ is the refractive index of the first medium, θ₁ is the angle of incidence, n₂ is the refractive index of the second medium, and θ₂ is the angle of refraction.

In this problem, we know that the angle of incidence is 30.0 degrees and the angle of refraction is 18.0 degrees. We also know that the refractive index of air (n₁) is 1.00. Therefore, we can use Snell's law to solve for the refractive index of the new medium (n₂):

n₁ sin θ₁ = n₂ sin θ₂

1.00 sin 30.0° = n₂ sin 18.0°

n₂ = (1.00 sin 30.0°) / sin 18.0°

n₂ ≈ 1.59

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Our first step is to find out the area of the roof, which is:

We can then obtain the power by multiplying it to the solar radiation:

Then, our final answer is P=185340.96W

Answer:

First let's find the work.

Work = Force*Displacement

= 20*5

= 100 Joules

Power = Work/Time

= 100/4

= 25 Watts

Answer:

B.false

Explanation:

wining does not only depends on scoring a goal no

Ancient Greek history shows that winning at any cost was always the goal of sports. the statement is false.

Goal can be defined as something where an individual or a group of individual aim to achieve something, they might make an envision, plan and commit to achieve a desired objective within a finite time by setting deadlines.

goal can be denoted as  an anticipated result that motivates a person to direct his/ her effort where the Persistence and patience are two important qualities to achieve one’s goals.

Goals van be specific, close-ended quantifiable objectives with a limited time period or achieving them, it can help to concentrate energy by defining what needs to be done and setting reasonable time limits for it,

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The net force on particle q2 can be calculated by finding the net electric force acting on it. The net electric force acting on a particle is the vector sum of the forces exerted by all the other charges on it.

The electric force between two charges q1 and q2 is given by Coulomb's law: F = k * (q1 * q2)/r^2, where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

The force on particle q2 due to q1 will be:

F1 = k * (q1 * q2) / (0.980m)^2

The force on particle q2 due to q3 will be:

F2 = k * (q2 * q3) / (0.750m)^2

The net force acting on q2 will be the vector sum of F1 and F2.

Keep in mind, q1 and q3 have opposite charges, so they attract each other, while q2 has the same charge as q1, so they repel each other.

Note: The unit of charge is Coulomb (C), but in this problem you are given the charges in microCoulomb (uC) so you need to convert it to Coulomb.

Answer:

Ek = 720J

Explanation:

Ek = 0.5mv^2

Ek = 0.5(90)(4)^2

Ek = 720J

Answer:

1 mole of every substance has 6.022 × 10^23 particles. This is called Avagadro's constant

The motion of an electron through a closed circuit with a lightbulb is a fundamental concept in physics. When an electron moves through the lightbulb, the electric potential energy of the electron changes. The changes that occur are dependent on several factors, and they include.

The electric potential difference across the circuit this is what drives the electron through the circuit.The amount of resistance in the lightbulb; this is what impedes the motion of the electron.The following apply:When the electron passes through the lightbulb, its electric potential energy decreases.The electric potential energy of the electron is highest when it is at the starting point, and it has not started moving.The electric potential energy of the electron is lowest when it has moved through the lightbulb to the other end of the circuit.

When the electron passes through the lightbulb, some of its electrical potential energy is converted into heat and light energy.This heat and light energy is what makes the lightbulb glow. Therefore, the electric potential energy of the electron decreases as it moves through the lightbulb.The right options that apply to the given question are:When the electron passes through the lightbulb, its electric potential energy decreases.When the electron passes through the lightbulb, some of its electrical potential energy is converted into heat and light energy.

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