Concrete sections for a new building have the dimensions and shape shown in the figure
a. find the area of the face of the section superimposed on the rectangular coordinate system. (round your answer to three decimal places.) ____ m2
b. find the volume of concrete in one of the sections by multiplying area in part (a) by 2 meters. (round your answer to three decimal places.) ____ m2
c. one cubic meter of concrete weights 5000 pounds. Find the weight of the section. (round your answer to three decimal places.) m2

You wish to start a fire by reflecting sunlight from a mirror onto some paper under a pile of wood which means the best choice of the type of mirror for this operation is a concave one and is denoted as option B.

This type of mirror usually has a reflective surface that is curved inward and away from the light source. They also reflect light inward to one focal point which is done by reflecting all the rays parallel to its axis and converge them at a single point.

For fire to occur, then we need a large concentration of light rays which will help reflect all the sunlight from a mirror onto some paper under a pile of wood thereby causing the fire.

This is therefore the reason why concave mirror was chosen as the most appropriate choice.

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Answer:

skier

Explanation:

i took the test

Whenever the circuit is turned on, each of these elements has the same current through it. The correct option is A.

The current is stream of charges flowing through circuit from the positive terminal to the negative terminal of the voltage source.

A series circuit consists of a switch, a 6-v battery, a lightbulb, and some copper wire. The circuit has the current I flowing in it.  Light bulb will act as resistor. When the circuit is on, current will flow through the entire circuit and its elements starting from the positive terminal of battery to the negative terminal of battery.

Thus, whenever the circuit is turned on, each of these elements has the same current through it. The correct option is A.

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Answer:

When you push it hard enough, then force for the Bush is created than the fictional force. So that means that is net force Equus. If Bush minus the fiction force is very Dan zero, so that means that is mass times acceleration. So that's why it starts moving in the direction off the bush Boxee.

Explanation:

Answer:

tensional force

Explanation:

It usually exist in fluid or any liquid substance where by an object is put before it

e.g An ant can walk on water without submersed in it.

This statement is false .

Space-X is only planning for Mars colonization. Alpha centauri is just a proposal. so, it is False

Entrepreneur Elon Musk founded SpaceX as for reshaping the aerospace sector and bringing about a more accessible type of space travel. With the Falcon 1 rocket, a two-stage, liquid-fueled vehicle built for launching miniature satellites into orbit, the corporation entered the fray.

In accordance with the NASA Commercial Crew Program, this is the sixth SpaceX flight to carry people, including the Demo-2 test voyage to the space station in 2020.

Entrepreneur Elon Musk founded SpaceX in the goal of reshaping the aerospace sector and bringing about a more accessible type of space travel.    

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(a) The equation for p is p = p0 * e^(-h/k). (b) The pressure p at an altitude of 5 km is 51.5 kPa.

(a) To solve the equation for p, we have the formula:
ln(p/p0) = -h/k

First, let's rewrite the formula in terms of exponentials:
p/p0 = e^(-h/k)

Now, we want to isolate p, so we'll multiply both sides of the equation by p0:
p = p0 * e^(-h/k)

(b) To find the pressure p at an altitude of 5 km, we can plug in the values for h, k, and p0 into the equation we derived in part (a):
p = 100 * e^(-5/7)

Now, we can calculate the value of p:
p ≈ 100 * e^(-5/7) ≈ 100 * 0.515 ≈ 51.5 kPa

So, the pressure p at an altitude of 5 km is approximately 51.5 kPa.

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Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape. Conductors: materials that allow electrons to flow through them easily. Conductors CANNOT be easily charged by friction as the extra electrons gained can easily escape. When negatively charged rod is put near a metal can

Big has no cause of action against Temper. In this scenario, while Temper may have made a verbal threat and raised his fists in a confrontational manner, there is no indication that he physically touched or harmed Big.

Assault refers to the act of intentionally causing apprehension or fear of imminent harmful or offensive contact. Battery, on the other hand, involves the intentional and harmful or offensive physical contact with another person without their consent.

In this case, Temper's actions may constitute assault due to the verbal threat and raising his fists, creating an atmosphere of fear or apprehension. However, since no physical contact or harm occurred, battery is not applicable. Therefore, the appropriate response is option d: Big has no cause of action against Temper.

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Answer:

I think it might be A: Alec but tell me if I'm wrong

Explanation:

Answer:

a

Explanation:

i did it on e d g e n u i t y

Answer: Half of an object's mass (1/2*m) multiplied by the velocity squared

Explanation:

In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.  

Hope this helps! <3

Your question has been heard loud and clear.

Gallelio Galei is truly the father of modern sciences. Well I mean he had a cool beard , but he still was intelligent.

Thank you

The magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.

A unit vector is a type of quantity that has both magnitude and direction.

A unit vector can also be described as a single vector that can represent two vectors in terms of magnitude and direction.

A resultant vector is defined as a single vector that produces the same effect as is produced by a number of vectors collectively.

The unit vector of the two forces is calculated as follows;

R² = Fx² + Fy²

where;

R = √( Fx² + Fy²)

R = √( 100² + 153.2²)

R = 182.95 N

The direction of the vector is calculated as follows;

θ = arc tan (Fy/Fx)

θ = arc tan (153.2 / 100)

θ = 56.87⁰

Thus, the magnitude of the unit vector of the forces is 182.92 N and the direction is 56.87⁰.

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Explanation:

Given,

A car is starting from rest, so it's initial velocity (u)= 0m/s

Acceleration (a) = 20m/s²

distance covered (s) = 50m

Therefore, time taken (t) = ?

Here,

s= ut + 1/2 at²

or, 50 = 0 × t + 1/2 × 20 × t²

or, 50 = 0 + 20t² /2

or, 50× 2= 20t²

or, 100 = 20t²

or, 100/20 = t²

or, 5 = t²

or, √5 = t

therefore, t = 2.2360 seconds.

The maximum acceleration of the mass is 11.28 m/\(s^{2}\). I have taken the standard units while doing calculation as units are not clearly given.

We can calculate the acceleration of a moving spring using Hooke's Law. we need to identify the mass m of the object, the spring constant k of the spring, and the distance x the spring has been displaced from equilibrium.

Using the equation a=kxm a = k x m, we calculate the magnitude of the spring's acceleration.

Given mass = 3.5 kg

spring constant = 6

velocity = 70 m/s

U = 1/2 M\(W^{2}\)\(A^{2}\) = 1/2 K\(A^{2}\)

    = 1/2 ×3.3×70 = 1/2 ×6× \(A^{2}\)

    \(A^{2}\) = 38.5

     A = 6.20 M

\(W^{2}\)\(A^{2}\) = 70

\(W^{2}\) = 70/38.5 =1.82

\(a_{MAX\) = \(W^{2}\)A

          = 1.82 ×6.20

           = 11.28 m\(s^{2}\)

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Answer:

The cue ball crashing into the eight balls on a pool table.

Explanation:

Elastic and inelastic collisions are two types of collisions.

For elastic collision, both the momentum and the kinetic energy before and after the collision remains conserved.

Out of the given options, the option that shows an example of an elastic collision is option A " The cue ball crashing into the eight balls on a pool table." All the eight balls after crashing moves with different velocity.

(a)  If the mass of the blob is reduced by half, the new period of oscillation will same as the initial.

(b) The new period of oscillation on Pluto is 4 times the period of oscillation on Earth.

The new period of oscillation of the pendulum is calculated as follows;

T = 2π √ ( L / g )

where;

From the equation above we can see that the period of a pendulum does not depend on the mass of the bob, but only on the length of the string.

Hence, the new period of oscillation will be same value as the initial.

The new period of oscillation on Pluto when the gravity of Pluto is 1/16 of Earth is calculated as;

T' =  2π √ (L/g/16)

T' = 2π √ ( 16L/g )

T' = 4 [ 2π √ (L/g) ]

T' = (4T)

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A particle moving at speed 0.32 c has momentum P₀. the speed of the particle is increased to 0.72 c then its momentum would be 2.25P₀.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

Mathematically the formula of the momentum is

P = mv

where P is the momentum of the particle

m is the mass of the particle

v is the velocity by which the particle is moving

As given in the question a particle moving at speed 0.32 c has momentum P₀. the speed of the particle is increased to 0.72 c

by using the formula of the momentum and substituting the values of the velocity

P =mv

As mentioned in the question when the particle is moving with 0.32c velocity it has a momentum of P₀

P₀ = m*(0.32c)

If the speed of the particle is increased to 0.72 c the momentum would be

P=m*(0.72c)

by dividing the second equation from the first one

P₀/P = 0.32c/0.72c

P₀/P = 0.44

P =2.25P₀

Thus, the increased momentum of the particle would be 2.25P₀

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The string's tension F(t) will be less than the force of friction F(fric) acting on mass m₁.

Since velocity is constant.

∴ According to Newton's second law of motion, net force on m₁ must be zero. ( If an object moves with constant velocity than net force acting on it will be zero. )

Balancing forces on m₁ along the incline,

F(fric) - m₁ g sinθ - F(t) = 0

F(t) = F(fric) - m₁ g sinθ

where, θ = Angle of incline

Hence, tension F(t) in the string will be less than the frictional force F(fric) on mass m₁.

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The main advantage of using models in science is the chance to predict a given outcome and make new predictions.

The expression 'scientific models' makes reference to all advancements associated with the use of scientific claims, especially scientific theories that are well sustained by empirical evidence and the chance to prove these claims before their usage.

The scientific advantages are mainly associated with the possibility to predict the result of phenomena from the real world, which also allows for making new predictions.

In conclusion, the main advantage of using models in science is the chance to predict a given outcome and make new predictions.

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Answer:

26.8%

Explanation:

The type of immersion Supervised Agricultural Experience (SAE) that requires a research plan to include all safety requirements is the "Experimental SAE."

In this type of SAE, students engage in research activities related to agriculture or a specific agricultural topic. Since experimentation involves potentially hazardous materials, equipment, or procedures, it is crucial to incorporate safety measures and protocols into the research plan. This ensures that students understand and adhere to safety guidelines while conducting their experiments.

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The find the mass of the aluminum bar, we need to use the heat transfer formula Q = mcΔT - Q represents the heat transferred (581 J, as given in the question) - m is the mass of the aluminum bar (which we need to find) - c is the specific heat capacity of aluminum (which is approximately 0.897 J/Gac) - ΔT is the change in temperature of the aluminum bar

The First, we need to find ΔT, which is the difference between the initial and final temperatures of the aluminum bar. However, the temperature information is missing from the question, so I'll assume it's provided in the problem. Once you have the initial and final temperatures, subtract the initial temperature from the final temperature to find ΔT = Final temperature - Initial temperature Now, we can use the heat transfer formula to find the mass (m) of the aluminum bar:
Q = mcΔT Rearrange the formula to solve form m = Q / (cΔT) Plug in the given values (Q, c, and ΔT) into the formula:
m = 581 J / (0.897 J/Gac * ΔT) Finally, calculate the mass (m) of the aluminum bar, and you'll have your answer.

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In conclusion, it is not possible to achieve an average speed of 90 km/h on this car trip, regardless of the average speed for the second half of the distance.

To average 90 km/h on a car trip, you need to maintain a specific average speed for the entire journey. In this case, you covered the first half of the distance at an average speed of 48 km/h. Now, let's determine the average speed you must have for the second half of the trip to meet your goal.

To find the average speed for the entire trip, you can use the concept of harmonic mean. The harmonic mean is the reciprocal of the average of the reciprocals. In this case, we can calculate the harmonic mean of the two speeds:

Harmonic Mean = 2 * (Speed1 * Speed2) / (Speed1 + Speed2)

Let's plug in the known values:

48 km/h * Speed2 / (48 km/h + Speed2) = 90 km/h

Now, we can solve for Speed2:

48 km/h * Speed2 = 90 km/h * (48 km/h + Speed2)

48 km/h * Speed2 = 90 km/h * 48 km/h + 90 km/h * Speed2

48 km/h * Speed2 - 90 km/h * Speed2 = 90 km/h * 48 km/h

-42 km/h * Speed2 = 90 km/h * 48 km/h

Speed2 = (90 km/h * 48 km/h) / -42 km/h

Speed2 ≈ -102.857 km/h

Since a negative speed is not physically possible, we can conclude that it is not possible to average 90 km/h on this trip. The goal is not achievable given the conditions provided.

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This reduces the force of the impact on the egg, limiting the amount of damage it receives.

What is force ?

Force is an influence that can cause a change in the motion, direction, or shape of an object. It is a vector quantity, meaning it has both magnitude and direction. Forces are a result of interactions between objects, and can either be a push or a pull.

Force can cause an object to accelerate, decelerate, or remain in its current state of motion. Examples of forces include gravity, friction, electromagnetism, and the normal force. Force is measured in units of Newtons (N).

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Answer:

25.9

Explanation:

(15.4 m) + (10.5 m) d=25.9

To calculate the number of turns required for the generator to produce a peak output voltage of vpk = 100, we can use the formula:

vpk = 4.44 * n * b * f * A

Where:
- vpk = peak output voltage (in volts)
- n = number of turns
- b = magnetic field strength (in teslas)
- f = frequency (in hertz)
- A = area of the loop (in square meters)

First, we need to convert the dimensions of the loop from centimeters to meters:
- Length = 10 cm = 0.1 m
- Width = 10 cm = 0.1 m
- Area (A) = Length x Width = 0.1 m x 0.1 m = 0.01 m^2

We are given that the magnetic field strength (b) is constant and has a magnitude of 0.2 T, and the frequency (f) is 60 Hz. We are also given that the peak output voltage (vpk) is 100 V.

Substituting these values into the formula, we get:
100 = 4.44 * n * 0.2 * 60 * 0.01

Simplifying and solving for n, we get:
n = 375 turns

Therefore, the generator needs to have 375 turns in its square loop in order to produce a peak output voltage of 100 V when the electric company experiences a loss of power.

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