HELP I SUBMITTED 30 POINTS

Find calculated displacement.

Velocity - 70 m/s
Time - 4s
Initial position- 0m
Final Position- 50m
Calculated Displacement(m) - ?

No spam Ive had enough of that

Based on the nature of variables, none of the evidence card should be eliminated because they all represent variables.

Variables refers to any quantity that can have various values.

Variables include age, time , distance, height, speed, etc.

Variables can either be independent, dependent or constant.

There, none of the evidence card should be eliminated because they all represent variables.

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Yes, it is possible for an object to experience a net zero external unbalanced force. This means that the forces acting on the object are balanced, resulting in no overall force acting on it. An object can be in a state of rest or continue moving with a constant velocity when it experiences a net zero external unbalanced force.

When an object experiences a net zero external unbalanced force, it can be in different states:
If the object is at rest and experiences a net zero external unbalanced force, it will remain at rest. This occurs when the forces pushing or pulling on the object in different directions cancel each other out. For example, if you push an object with a force of 50 N to the right, and someone else pulls it with an equal force of 50 N to the left, the object will not move.
If the object is in motion and experiences a net zero external unbalanced force, it will continue to move with a constant velocity. This happens when the forces pushing or pulling on the object are equal in magnitude and opposite in direction. For instance, if a car is traveling at a constant speed of 60 km/h and experiences an equal resistance force due to air resistance, the net force on the car is zero, and it will continue moving at the same speed.
It's important to note that even though the net external unbalanced force is zero, the object may still experience internal forces, such as gravitational or frictional forces, which do not cancel out.

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Answer:

cold

Explanation:

cold air is more dense than warm air, therefore it has a higher pressure

Answer:

  R = 0.14  Ω

Explanation:

The resistance of a metal is given by the relation

         R = \(\rho \frac{L}{A}\)

where ρ the resistivity is 5.6 10-8 Ω m, they also give the length and the cross section (area)

Let's reduce the magnitudes to the SI system

        L = 200cm (1m / 100cm) = 2.00m

        A = 8.0 10⁻⁷ m²

let's calculate

       R = 5.6 10⁻⁸  \(\frac{2.00}{8.0 \ 10^{-7} }\)

       R = 1.4 10⁻¹ Ω

       R = 0.14  Ω

Answer:

The weight of the astronaut in Earth's orbit 400 km above the Earth's surface is 664.115 N

Explanation:

The given parameters are;

The weight of the astronaut on the ground = 750 N

The height of the orbit above the Earths surface = 400 km

The radius of the Earth = 6.38 × 10⁶ m

The mass of the Earth = 5.97 × 10²⁴ kg

The universal gravitational constant G = 6.674 × 10⁻¹¹ Nm²/kg²

From Newton's law of universal gravitation, we have;

\(Weight \ on \ ground \ of \ astronaut \ F_W =G\times \dfrac{M_{Earth} \times m_{astronouat}}{R_{Earth}^{2}} = 750 \ N\)

\(F_W =6.674 \times 10^{-11}\times \dfrac{5.97 \times 10^{24}\times m_{astronouat}}{(6.38 \times 10^6)^{2}} = 750 \ N\)

\(m_{astronaut}\) = ((6.38 × 10⁶)² × 750)/((6.674 × 10⁻¹¹) × (5.97 × 10²⁴)) ≈ 76.62 kg

The mass of the astronaut ≈ 76.62 kg

For the weight of the astronaut  in Earth orbit 400 km (400 × 10³ m) above the Earth's surface, we have;

\(F_{W \ in \ orbit} =6.674 \times 10^{-11}\times \dfrac{5.97 \times 10^{24}\times 76.62}{(6.38 \times 10^6 + 400 \times 10^3)^{2} } = 664.115 \ N\)

The weight of the astronaut in Earth's orbit 400 km above the Earth's surface = 664.115 N.

Any action intended to hurt, harm, or cause suffering to another living thing or group of beings is considered to be aggressive.

Specifically, acts that injure someone physically. action that harms psychological health, such as that which instills apprehension, concern, or anguish.When you hurt your brother, you also hurt him. One way to damage someone is to hurt them physically.

People who are distressed could also believe that they are unable to handle or cope with alterations brought on by everyday activities or medical conditions like cancer. It is unfavourable, unhealthy, and discouraging. Stressors events that trigger the stress reaction in our bodies. A stressor is anything that creates stress.

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The components in a circuit that will most likely have the most resistance is light bulb due to heating effect of current.

Resistance is the opposition to the flow of electrons in an electrical conductor.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

where;

During a high tension transmission, electricity is often transmitted at low current and high voltage, due to heating effect of current. The heating effect of current is due to its resistance.

Thus, the components in a circuit that will most likely have the most resistance is light bulb due to heating effect of current.

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The complete question is below:

Which of the following components in a circuit will most likely have the most resistance?

Battery

Copper wire

Closed switch

Light bulb

the answer is definitely A.

The graph that corresponds to 0.1 s in one complete cycle is graph D.

option D is the correct answer.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.

From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;

Period = 1 s / 10

Period = 0.1 s

From the graphs, the only option that has one complete cycle in one second is option D.

Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.

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Answer:steel plate

Explanation: bc I said so

Answer:

collagen and protein

Explanation:

Made mostly of collagen, bone is living, growing tissue collagen is a protein that provides a soft framework and calcium photosphate site is a material that adds strength to hardness the framework.

Answer:

bones are made of collagen and protein

One everyday usage of the CoE or WET equation could be to determine the energy required to heat up a cup of water using a microwave oven. The initial state is a cup of room temperature water, while the final state is hot water.

To heat up the water, the microwave oven converts electrical energy from the power source into electromagnetic radiation, which then interacts with the water molecules and causes them to vibrate rapidly, generating heat. This process involves the conversion of electrical energy into thermal energy, and the transfer of thermal energy from the water to the surrounding environment.

However, there are also other types of energies involved in this process, such as the rotational and vibrational energies of the water molecules, as well as the energy of the microwave radiation itself.

A more complicated scenario could involve multiple steps, such as heating up a pot of water on a stove. In this case, the initial state is a pot of cold water on a stove, while the final state is hot water. The process involves the transfer of heat energy from the stove to the water through conduction, and then the conversion of thermal energy in the water into kinetic energy as the water molecules start to move faster and generate steam. This process also involves the conversion of chemical energy in the fuel used by the stove into thermal energy, as well as the transfer of thermal energy from the stove to the surrounding environment through convection and radiation.

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EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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The magnitude of reaction at the beam due to the distributed load of 25 kN/m is 625 N.

The magnitude of reaction at the beam can be determined by calculating the total force exerted by the distributed load. In this case, the distributed load is given as 25 kN/m. To find the magnitude of reaction, we multiply the distributed load by the length of the beam.

Therefore, the magnitude of reaction is 25 kN/m multiplied by the length of the beam in meters. By performing the calculation, we obtain the value of 625 N as the magnitude of reaction at the beam due to the distributed load. This represents the total force exerted by the distributed load on the beam.

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The winds aloft chart for the Great Lakes (Michigan is fine) region displays the wind direction and speed at several altitudes. At 3000 feet, the wind speed is approximately 17 knots.

At 12,000 feet, the wind speed is about 44 knots. The wind speed at FL350 is approximately 67 knots.Surface friction has an effect on the winds close to the ground, slowing them down due to the frictional force exerted on the ground by air molecules. The winds shift direction with altitude, veering to the right of the direction of travel in the northern hemisphere. The approximate location of the Jetstream can be obtained by examining the wind/temperature plot chart. The fastest wind speed at FL360 appears to be approximately 145 knots, traveling towards the northeast. Flight to the east or southeast would benefit from this wind speed.Seasonally, winds aloft change depending on the position of the jet stream, which moves towards the poles during the summer months and towards the equator during the winter months.

The current surface analysis chart (Prog chart) shows the major frontal activity passing through the Midwest states. Precipitation is what leads the frontal passage in general, with both temperature and wind speed/direction changing from behind to ahead of the front.

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By using uniform motion, the distance traveled by the swan is 51.43 meters.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 0 m/s

vt = 6 m/s

a = 0.35 m/s²

By using second equation, we can find the distance traveled by swan

vt² = vo² + 2a . s

6² = 0² + 2 . 0.35 . s

36 = 0.7 s

s = 36 / 0.7

s = 51.43 m

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The dimension of maximum height is M.

The dimension of time of flight is T.

The dimension of range of projectile is M.

The maximum height reached by a projectile is the highest vertical height attained by the projectile.

H = u² sin²θ / 2g

where;

The unit of maximum height is meters, so the dimension will be  M.

The time of flight of a projectile is the total time spent in air by a projectile.

T = 2usinθ / g

The unit of time of flight is seconds, and the dimension will be T.

The range of a projectile is given as;

R = u² sin(2θ) / g

The unit of range of a projectile is meters and the dimension is M.

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Impurities will lower the melting point of a pure compound and increase the melting point range.

When an impurity is mixed with a pure substance, it lowers the melting point of the compound and expands its melting range. If a substance has a pure melting point of 110-111°C, adding a 5% impurity would cause the melting point to drop to 103-107°C, while the melting point range would broaden. It's difficult to predict the precise melting point range, but estimates such as 100-105°C, 97-100°C, and 102-110°C are all possible.

Impurities that are added to a substance have a noticeable effect on the melting point of the pure substance, which is used to evaluate the purity of the sample. The melting point of a compound is an important characteristic that chemists use to determine its identity and purity.

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Answer:

Eccentricity is found by the distance from a focus to the center of an ellipse along the semi-major axis divided by the semi-major axis length.

Remember that the sun is always a focus point to a planet orbiting around the sun.

11)  The semi-major axis length is (180+220)/2 = 200

      220-200= 20 <= distance from focus to the center of the ellipse along the semi-major axis length

        e= 20/200 = 0.1

Here's the answer for the next question too :)

12)  (147.2+152.1)/2= 149.65

       152.1-149.65= 2.45

        e= 2.45/149.65 = 0.0164

Explanation:

yahoo answered these questions 8 years ago O.o

The eccentricity of the orbit of a planet whose distance from the sun varies from 180 million to 220 million km is 0.1.

A conic section's eccentricity is a non-negative real integer that defines its form. More precisely, two conic sections are comparable if and only if their eccentricities are the same. The eccentricity may be thought of as a measure of how much a conic section deviates from being circular.

Eccentricity is calculated by dividing the distance from a focus to the center of an ellipse along the semi-major axis by the length of the semi-major axis.

Since the sun is always the focal point for planets orbiting around the sun. Therefore, we can write,

The semi-major axis length = (180 +220) / 2

                                             = 200

Now, the length of the semi-major axis from the focus to the center of the ellipse is,

Length = 220 - 200 = 20

Further, the eccentricity can be written as,

e= 20/200 = 0.1

Hence,  The eccentricity of the orbit of a planet whose distance from the sun varies from 180 million to 220 million km is 0.1.

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The height of the building where a penny falls and hits the ground going 30 m/s is 45.9 m.

The height of the building can be calculated with the following equation:

\( v_{f}^{2} = v_{i}^{2} + 2gh \)

Where:

\( v_{f}\): is the final speed = 30 m/s

\( v_{i}\): is the initial velocity = 0 (it falls from rest)

g: is the acceleration due to gravity = 9.81 m/s²

h: is the height =?

Hence, the height is:

\( h = \frac{v_{f}^{2} - v_{i}^{2}}{2g} = \frac{(30 m/s)^{2}}{2*9.81 m/s^{2}} = 45.9 m \)

Therefore, the height of the building is 45.9 m.  

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I hope it helps you!

3 electrical equipments consider for this circuit diagram are,

1. Ammeter

2. Resistance

3. Resistance

The circuit diagram with 6 lamps and 3 electrical equipments and 1 power source with open circuit form is represented as,

Answer:

B

Explanation:

this is because the neutrons do not have a charge, the things that have charge in an atom are electrons and protons.

and in the nucleus of an atom, there are protons and neutrons so you can see that A is not the answer

if you see the periodic table, you will know that the number of electrons and protons are equal, so the charges cancel each other out, hence the charge of an atom will be neutral

let me give you a tip which I got from my teacher, never write there is no charge in the atom, this suggests that there is no protons or electrons.

instead, write, the it is neutral

hope it helps if not please report it so that someone else gets to try it out

Answer:

a.) C.

b.)b.

c.)E.

d.)A.

Answer:

if there is only one planet in the universe and the ball is there it will have 0 kinetic energy if the ball is in the very center of that planet only if the planet itself is absolutely motionless. its at its highest if the planet is moving away from the ball at a slightly faster speed forever. Between point A and B both potential energy and kinetic energy are at perfect 0.

Explanation:

never will have a measurable kinetic or potential energy status unless every single object is included in the calculation.

The time taken for the man to reach the ground is 0.64 s and his velocity on reaching the round is 6.26 m/s.

Given that we can be able to use the equations of kinematics to obtain the time that it took the man to fall to the floor. Using the equation;

v^2 = u^2 + 2gh

v = final velocity

u = initial velocity

g = acceleration due to gravity

h = height attained

Note that u= 0 m/s since he dropped from a height;

v= √2gh

v = √2 * 9.8 * 2

v = 6.26 m/s

Again;

v = u + gt

Again  u= 0 m/s

v = gt

t = v/g

t = 6.26 m/s/9.8 m/s

t = 0.64 m/s

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Answer:

Q=mc(T2-T1)

Explanation:

Ti is the temperature

m is mass

c is specific heat capacity for steam

Q is heat, [Q]=J

There is only one path to travel if two resistors are in series, therefore the correct answer is option A

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

For calculating equivalent resistance in parallel combination.

Re = R1  + R2

As given in the problem two resistors are connected in a series combination and we know that the current would be the same in the circuit as the resulting current follows only a single path.

Thus, the correct answer is option A.

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import numpy as np:

random_vector = np.random.rand(15)

modified_vector = np.where(random_vector == np.max(random_vector), -1, random_vector)

print("Original Array:", random_vector)

print("Modified Array:", modified_vector)

A NumPy program that creates a random vector of size 15, replaces the maximum value with -1, and prints both the original array and the modified array:

```python

import numpy as np

# Create a random vector of size 15

random_vector = np.random.rand(15)

# Find the maximum value in the vector

max_value = np.max(random_vector)

# Replace the maximum value with -1

modified_vector = np.where(random_vector == max_value, -1, random_vector)

# Print the original and modified arrays

print("Original Array:")

print(random_vector)

print("\nModified Array:")

print(modified_vector)

```

When you run this program, it will generate a random vector of size 15 and display the original array. Then, it will replace the maximum value in the array with -1 and display the modified array.

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Answer:

The orbital velocity an aircraft orbiting around a heavenly body is found as follows;

At the orbital velocity, \(F_G\) = \(F_C\)

Where;

\(F_G\) = The gravitational force = \(\dfrac{G \cdot M \cdot m}{R_E^2}\)

\(F_C\) = The centripetal force = \(\dfrac{m \cdot v_0^2}{R_E}\)

Therefore

\(v_0 = \sqrt{\dfrac{G \cdot M}{R_E} }\)

Therefore, at the orbital velocity of the spacecraft, the centripetal force attracting the person away from the central region heavenly body is equal to the gravitational force pulling the person towards the center of the heavenly body (which was felt as her or his weight), and the person feels weightless while inside the orbiting spacecraft

Explanation: