Calculate the mass of wood that has the same energy as 1 g of oil

Answer:

Comencemos con la primera:

si tenemos algo como:

7.1*10^n

Simplemente lo que tenemos que hacer es:

si n es positivo, movemos n veces el punto para la derecha, si no tenemos dígitos, completamos con ceros.

si n es negativo, movemos n veces el punto a la izquierda.

a) 7.1*10

aca tenemos n = 1

entonces movemos una vez el punto a la derecha:

7.1*10 = 71. = 71

b) 2.3*10^3

aca n = 3, entonces movemos el punto 3 veces a la derecha:

2.3*10^3 = 23__.

Tenemos dos huecos ahí, los cuales serán completados con ceros, entonces:

2.3*10^3 = 2,300. = 2,300

c) 1.56*10

n = 1, entonces movemos el punto una vez a la derecha:

1.56*10 = 15.6

d) 4.10^4

acá tenemos n = 4

entonces movemos el punto 4 veces a la derecha, recordar que debemos completar con ceros:

4.10^4 = 40,000. = 40,000

Answer:

Radiation

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.

The coefficient of static friction between the crate and the floor is calculated to be 0.275.

The frictional force when an object moves on the horizontal surface is given as,

Ff = μ N

where, N is the normal force

μ is the coefficient of static or kinematic friction

If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal force are equal in magnitude.

N = W = m g

Given that,

Mass of the crate = 26 kg

Frictional force Ff = 70 N

Weight of the crate = 26 × 9.8 = 254.8 N

The normal force is 254.8 N.

The coefficient of static friction μ = Ff /N = 70/254.8 = 0.275

Thus, the coefficient of static friction between the crate and the floor is 0.275.

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The control voltage in an air-conditioning system typically comes directly from the system's thermostat or control panel.

The thermostat senses the room's temperature and, based on the desired temperature setting, sends a control voltage signal to the various components, such as the compressor, condenser, and evaporator, to regulate their operation. This voltage is usually lower (24 volts) compared to the main power supply voltage (120/240 volts) and is used to control the contactors or relays, which in turn switch the high-voltage components on or off. The control voltage enables precise temperature control, energy efficiency, and safe operation of the air-conditioning system, ensuring a comfortable indoor environment.

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Nuclei of the same element can have different values of Z, N, and A, as these values are all related to the number of protons, neutrons, and nucleons in the nucleus, respectively. Therefore, option 2, 3, and 4 are correct.

Nuclei of the same element can have different values of Z, N, and A due to the number of protons, neutrons, and nucleons they contain, respectively. This is because the number of these particles in the nucleus can vary, although they all will still be the same element. Therefore, option 2, 3, and 4 are correct and option 1 is incorrect.

Nuclei of the same element can have different values of Z, N, and A, as these values are all related to the number of protons, neutrons, and nucleons in the nucleus, respectively. Therefore, option 2, 3, and 4 are correct.

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Answer:

speeding up

Explanation:

because its speeding up, theres going to be more newtons in the back

i really hope this is right, tell me if so

The volume of material that needs to be excavated from the foundation is approximately 166.67 ft³.

To calculate the volume of material that needs to be excavated from the foundation based on the given dimensions, we need to find the volume of the rectangular prism formed by the dimensions of the foundation and subtract the volume of the adjusted square.

Given:

Calculating the volume of the rectangular prism:

Volume = Length * Width * Depth

= 100 ft * 100 ft * (0.2/12) ft

= 166.67 ft³

Therefore, the volume of material that needs to be excavated from the foundation is approximately 166.67 ft³.

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Answer:

Explanation:

Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

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Answer:

x_total = 20m

Explanation:

This is an exercise in kinematics, we will look for the distance it travels during the reaction time, where there is no braking, and then the distance during the deceleration.

Distance traveled during response time

           v = x₁ / t

           x₁ = v t

let's calculate

          x₁ = 10 0.75

          x₁ = 7.5 m

Now we calculate the distance during braking, the final speed is zero (v = 0)

         v² = v₀² - 2 a x₂

         x₂ = v₀² / 2 a

let's calculate

         x₂ = 10² / (2 4)

         x₂ = 12.5m

the total stopping distance is

        x_total = x₁ + x₂

        X_total = 7.5 + 12.5

        x_total = 20m

Answer:

a = 1.428 [m/s²]

v₀ = 5 [m/s]

Explanation:

To solve this problem we must use the following equation of kinematics.

\(x=x_{o}+v_{o}*t+\frac{1}{2}*a*t^{2}\)

where:

x = final point [m]

x₀ = initial point [m]

v₀ = initial velocity [m/s]

a = acceleration [m/s²]

t = time [s]

But we need to use this additional equation.

\(v_{f}=v_{o}+a*t\)

where:

vf = final velocity = 15 [m/s]

Now we can use this equation, replacing it, in the first one. We must bear in mind that the difference among x - x₀ is equal to 70 [m]

\(x-x_{o}=v_{o}*t+\frac{1}{2}*a*t^{2} \\x-x_{o}=(v_{f}-a*t)*t+\frac{1}{2} *a*t^{2}\\70=(15-a*t)*t+\frac{1}{2}*a*t^{2}\\70=15*t-a*t^{2} +\frac{1}{2}*a*t^{2} \\70=15*t-\frac{1}{2}*a*t^{2}\\70=15*(7)-\frac{1}{2} *a*(7)^{2}\\105-70=0.5*a*49\\35=24.5*a\\a=1.428[m/s^{2} ]\)

Now replacing this value in the second equation, we can find the initial velocity.

\(15=v_{o}+1.428*7\\v_{o}=5[m/s]\)

Answer:

a. 40.0 N

b. 0.41

Explanation:

By the second law of Newton, the net force is equal to the mass times the acceleration. In this case, the net force is the applied force less the frictional force, so

Where F is the applied force, Ff is the friction force, m is the mass and a is the acceleration.

Solving for Ff, we get

Now, we can replace the values

So, the frictional force is 40N

On the other hand, the force of friction is equal to the normal force times the coefficient of friction. Where the normal is equal to its weight, so

Where μ is the coefficient of friction and g is the gravity and it is equal to 9.8 m/s². Solving for μ

Now, we can replace the values to get

Therefore, the coefficient of friction is 0.41

Then, the answers are

a. 40.0 N

b. 0.41

Answer:

19m/s

Explanation:

U= 4m/s

a = 0.5m/s²

t= 30s

V= U+at

= 4+15

=19m/s

Answer:

Explanation:

Because of hydrogen bonding, water exhibits several unique characteristics.

Hydrogen bonding occurs between the hydrogen atom of one water molecule and the oxygen atom of another water molecule. This results in water molecules being held together by strong intermolecular forces, which leads to several unique properties of water. These include a high boiling point, high surface tension, and the ability to dissolve many substances. Additionally, hydrogen bonding also allows for water to have a higher density in its liquid state compared to its solid state, which is why ice floats on water. Overall, the presence of hydrogen bonding in water contributes to its importance as a universal solvent and a vital component of many biological processes.

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The statement that illustrates how progress in engineering has affected the natural environment is extracting mineral resources with modern mining equipment removes fertile topsoil.

The natural environment may be defined as anything that can be present in the surroundings of living entities whether it is a biotic or abiotic factor.

The utilization of contemporary mining tools terminates fertile topsoil and admiringly impacts the fertility of the soil.  It is tough to rebuild topsoil and modern mining tools constantly damage soil fertility.

Advancement in engineering has influenced the natural environment and mining is one of the most accepted measures of this.

The complete question is as follows:

Therefore, it is well described above.

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Answer:

\(\boxed {\boxed {\sf 13.3 \ m/s^2}}\)

Explanation:

Acceleration is the rate of change of velocity with respect to time. It is the change in velocity over the change in time, and it is calculated using the following formula.

\(a= \frac{ v_f-v_i}{t}\)

The car starts at a speed of 10 meters per second, then it accelerates to a speed of 50 meters per second. It achieves this acceleration in 3 seconds.

Substitute the values into the formula.

\(a= \frac{50 \ m/s - 10 \ m/s}{3 \ s}\)

Solve the numerator.

\(a= \frac{40 \ m/s}{3 \ s}\)

Divide.

\(a= 13.3333333 \ m/s/s\)

\(a \approx 13.3 \ m/s^2\)

The car's acceleration is approximately 13.3 meters per second squared.

In the event of a front tire blowout, hold the steering wheel tightly, compensate for the pulling, and avoid braking hard. Gradually release the accelerator, maintain control, and safely maneuver to the side of the road.

If you experience a front tire blowout while driving, it is crucial to remain calm and take appropriate actions to maintain control of your vehicle. Here's what you should do:

1. Stay calm and maintain control: It is essential to avoid panic and keep a firm grip on the steering wheel. Do not make sudden movements or overreact, as it may lead to losing control of the vehicle.

2. Do not brake forcefully: Abruptly hitting the brakes can cause the car to skid or spin out of control, especially with a front tire blowout. Instead, gradually release the accelerator pedal to slow down gradually.

3. Counteract the pulling: As the front tire goes flat, your vehicle will tend to pull strongly in the direction of the affected side.

To counteract this, apply gentle and steady pressure on the opposite side of the steering wheel. This will help you maintain a straight path and prevent veering into other lanes or obstacles.

4. Signal and move to a safe location: Once you have regained control, use your turn signals to indicate your intention to change lanes.

Slowly and safely maneuver your vehicle to the side of the road or a designated safe area away from traffic.

5. Assess the situation and seek assistance: After coming to a stop, evaluate the condition of the tire and call for roadside assistance or change the tire yourself if you have the necessary skills and equipment.

Remember, prevention is key, so regularly inspect and maintain your tires to minimize the risk of blowouts.

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Answer:

v=3.66,h-3.66

Explanation:

vertical = 10sin60 - 10sin 30

horizontal =10cos60 + 10cos 30

v = 10×0.8660-10×0.5

h = 10×0.5 + 10 × 0.8660

v=8.660-5.0 = 3.66

h= 5.0-8.660 = -3.66

Answer:

d

Explanation:

Answer:

363,000,000

Explanation:

Got it right on the assignment EDGE 2022.

A stock tank heater rated at 1500 watts will use 1,29,600 kJ of energy in a 24 hour period.

Given :

We know that

Energy = Power x time

E = P * t

E = 1500 x 24 x 3600

E = 129600000 J ( or 129600 kJ)

Hence, a stock tank heater rated at 1500 watts will use 1,29,600 kJ of energy in a 24 hour period.

The formula that links energy and power is:

Energy = Power x Time.

The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.

If we know the power in watts of an appliance and how many seconds it is used we can calculate the number of joules of electrical energy which have been converted to sortie other form.

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Answer:

Mitochondria (animal) and Chloroplast (plant)

The correct answer for the (A) Escape velocity is \(570\) (B) Escape velocity is \(0.57\) in Km/h and (c). Escape velocity is \(1.27\) in mph.

Given:

Diameter of asteroid D = \(10\) km

Radius R = \(5\) Km

Density \(\rho\)  = \(3000\) kg/m³

Unit conversion;

\(1\) m/s  = \(0.001\) Km/s

\(1\) m/s  = \(2.23694\) mph

(A)To calculate Escape velocity:

Use the formula;

\(v_e = \sqrt{\dfrac{2GM}{R} }\)

Gravitational Constant \(G\) = \(6.67430\)

To calculate Mass(\(M\)) of the asteroid, Calculate Volume(\(V\)) of the sphere and multiply it with density(\(\rho\)).

\(V= \dfrac{4}{3} \pi R^3 \\\\\rho = \dfrac{M}{V}\)

\(M = \rho*V\)

= \(523598775000\) Kg

Escape velocity:

\(v_e = \sqrt{\dfrac{2*6.67430 * 10^{-11} * 523598775000}{5000} }\)

\(= 570\) m/s

(B)Escape velocity in Km/s:

\(v_e = \dfrac{570}{1000}\)

\(= 0.57\)  Km/s

(B)Escape velocity in mph:

\(v_e = 0.57 * 2.23694\)

\(= 1.27\) mph

Escape velocity is \(570\) m/s. In Km/h is \(0.57\) and In mph is \(1.27\) .

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Answer: False

Explanation:  

Answer:

False

Explanation:

Soap bubbles reflect certain wavelengths of light, find minimum wall thickness for enhanced reflection of 729 nm light.

When light passes through a material with a higher refractive index than air, such as soap solution, it can be reflected back with greater intensity.

The thickness of the soap bubble's wall determines which wavelengths of light are reflected more efficiently.

To find the minimum wall thickness for enhanced reflection of 729 nm light, we can use the equation for constructive interference:

2nt = mλ, where n is the refractive index of the soap solution, t is the wall thickness, m is the order of the interference, and λ is the wavelength of the light in air.

Solving for t, we get t = (mλ)/(2n), or t = (729 nm)/(2*1.29) = 224 nm for m=1.

Therefore, the minimum wall thickness for enhancing the reflection of 729 nm light in air is 224 nm.

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After a girl delivering newspapers travels three blocks west, four blocks north, and then six blocks east, her total displacement is 5 blocks. While the total distance covered is 13 blocks.

A displacement is a vector in geometry and mechanics whose length is the smallest distance between the beginning and final positions of a moving point P.

If an item moves relative to a reference frame, such as a lecturer moving to the right of a whiteboard or a passenger moving toward the back of an airliner, the object's location changes. This shift in location is referred to as displacement.

Displacement (change in position) = Last position – initial position

To Calculate displacement, let displacement be (d)

d = -3i + 4j + 6i (-i because she turned west, +i because she turned east)

d = 3i + 4j

d = √(3² + 4²)

d = √(9 + 16)

d = √25

d = 5 blocks.

Total distance (Td_  = Sum of all the blocks traveled.

Td = 3 + 4 + 6

Td = 13 blocks.

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Answer:

14,400m

Explanation:

The formula for calculating speed is S=D/T.

S=speed( in meters per second- m/s)

D=distance(in meters)

T=time( in seconds)

For our case:

S=40m/s

D=?

Time=2 hours=60min x 60 sec=3600seconds

Now make D the subject.

D=S x T

D=4m/s x 3600s=14,400m

Therefore our answer is

14 400 m or 14.4 km

Interstellar is a movie about the human race being faced with a

civilization ending blight. A small group of brave individuals explore

possible new habitable worlds for humans. The following questions

will help guide you through the movie and hopefully get you

thinking about the future.

1. The Cooper family hijacks a UAV (Unmanned Aerial Vehicle).

What do you know about UAVs and how they are used today?

2. While at the parent-teacher conference, Murphy’s teacher

mentions that the Apollo program -- the same program that

landed humans on the Moon -- was just propaganda to

convince the Soviet Union to bankrupt themselves trying to do

the same. The reason for this was to encourage children to

take care of their own planet, rather than wasting precious

resources day dreaming of leaving it. Which side of the fence

would you sit on? Would you look for ways to save Earth and

our ability to stay there, or would you look to the sky, and find

a new planet to live on? Why?

3. A) What natural disaster(s) is Earth suffering from in the beginning of Interstellar?

B) If one of these happened now what actions would you take to protect yourself?

4. Cooper, Doyle, Romilly, and Dr. Brand (female) rendezvous with the Endurance in orbit around Earth. Once

onboard, they begin to spin the Endurance. Why? (Think about the physics happening here!) Draw a diagram.

5. Why or why isn’t space exploration important for the people in the movie interstellar? Why or why isn’t

space exploration important in today’s society? Defend your answers.

6. Explain time dilation as best as you can.

7. A) Estimate how long Dr. Mann went without human contact while on the ice planet:

The Lazarus mission was __________ years ago. It takes _______ years to get to Saturn from Earth. Cooper

and Dr. Brand were on Miller’s planet for approximately __________ years. This means the total time Dr.

Mann went without human contact is: ___________ years.

B) Consider the longest time away from human contact you've experienced. What did you do to keep yourself

occupied?

Useful Vocabulary

Blight: A specific symptom affecting plants in

response to infection by a pathogenic organism. The

potato famine of Ireland was caused by blight.

Event horizon: Is a point in which not even light can

escape the gravitational influence of the black hole.

Maroon: The intentional action of leaving someone

in a remote area such as an inhabitable island.

Rendezvous: When two objects meet and typically

dock together while in space.

Time dilation: A difference of elapsed time between

two events as measured by observers either moving

relative to each other or differently situated from

gravitational masses.

UAV: Unmanned Aerial Vehicles are remote

controlled or autonomous flying vehicles.

Unmanned aerial vehicles (UAVs) are typically used for a variety of purposes such as:

An unmanned aerial vehicle (UAV) is also referred to as a drone and it can be defined as an aircraft that is designed and developed to be piloted or controlled by a remote control (ground-based controller) and on-board computer systems.

This ultimately implies that, an unmanned aerial vehicle (UAV) is a class of aircrafts that can fly without any human pilot, cabin crew, or passengers on board.

In conclusion, unmanned aerial vehicles (UAVs) carries no human pilot and are typically used for a variety of purposes such as:

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Micah will experience a larger magnification is because the angular size of the object is smaller for Micah than for Lyra.

Why angular size of the object is smaller for Micah than for Lyra?

The magnification produced by a magnifier is given by the formula:

M = (25cm/f) + 1, where f is the focal length of the magnifier.

The magnification is larger when the focal length is smaller. However, in this case, both Micah and Lyra are using the same magnifier, so the focal length is the same for both of them.

The near point is the closest distance at which an object can be brought into focus by the eye. The near point varies from person to person, and it depends on the elasticity of the lens and the shape of the eye. In this case, Micah's near point is located farther away from his eye than Lyra's near point is located relative to her eye. This means that Micah's eye has less ability to focus on close objects than Lyra's eye.

When an object is located at the near point, the image formed on the retina is at its maximum size.

The angular size of the object is given by the formula:

θ = tan⁻¹ (s/d), where s is the size of the object and d is the distance between the object and the eye.

Since Micah's near point is farther away than Lyra's near point, the distance d is larger for Micah. This means that the angular size of the object is smaller for Micah than for Lyra.

When Micah uses the magnifier to inspect the object, the magnification will be larger because the angular size of the object is smaller.

This is because the magnification is proportional to the ratio of the angular size of the image to the angular size of the object.

Since the angular size of the object is smaller for Micah, the angular size of the image produced by the magnifier will be larger, resulting in a larger magnification for Micah.

Therefore, the correct reason why Micah will experience a larger magnification is because the angular size of the object is smaller for Micah than for Lyra when the object is located at his near point.

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When the object is located at his near point, the angular size of the object is smaller for Micah than for Lyra, for which reason Micah will experience a larger magnification.

The statement that is correct for the given question is "When the object is located at his near point, the angular size of the object is smaller for Micah than for Lyra."

Micah and Lyra are two people with different near points but are equally close to an object.

Both inspect the object through the same magnifier by holding the lens close to the eye. In this context, magnification is the ratio of the size of the image seen through the magnifier to the size of the object when viewed directly.

The distance between the object and the lens must be greater than the focal length of the lens to create a virtual image. Micah's near point is located farther away from his eye than Lyra's near point is located relative to her eye.

So, Micah will experience a larger magnification for the reason that when the object is located at his near point, the angular size of the object is smaller for Micah than for Lyra.

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