a car has an efficiency of 33% if the temperature at the exit from a machine is 150°celcius ¿what´s the temperature of the machine that the car came from?
un auto tiene una eficiencia del 33% si la temperatura a la salida de la maquina es de 150°celcius ¿cual es la temperatura de la fuente de suministro?
Answers
The temperature of the machine that the car came from is approximately 224.63°C.
The thermal efficiency of a car engine is given by: efficiency = (T1 - T2) / T1 where T1 is the temperature at the inlet of the engine, and T2 is the temperature at the outlet of the engine.Given that the efficiency of the car engine is 33%, or 0.33, and the outlet temperature is 150°C, we can solve for the inlet temperature as follows:0.33 = (T1 - 150) / T1
Multiplying both sides by T1, we get: 0.33T1 = T1 - 150. Subtracting T1 from both sides, we get: 0.33T1 - T1 = -150. Simplifying, we get-0.67T1 = -150 .Dividing both sides by -0.67, we get: T1 = 224.63°C. Therefore, the temperature of the machine that the car came from is approximately 224.63°C.
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Related Questions
You would like to confirm Netwon's second law by running an experiment. You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude?
Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
There is some other force present. This additional force is different for the two objects and accounts for the fact that the objects land at different times.
Newton's second law is not relevant in determining when an object will land on the ground.
One object must be heavier than the other and must therefore experience a greater gravitational acceleration.
Answers
Answer:
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
Explanation:
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
What would you not find on an acceleration graph? *
O pie chart
O x axis
O time
O velocity
Answers
if a truck has the mass of 2,000 kilometres and a velocity of 35 m/s, what is the momentum
Answers
Answer:
70,000 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 2000 × 35
We have the final answer as
70,000 kg.m/sHope this helps you
1) Calculate the ideal efficiency of a heat engine that takes in energy at 800 K and expels heat to a
reservoir at 300K ?
Answers
Answer:
Could you explain that more better?
Explanation:
PLZ HELP ME I BEG YOU :(
The chemical composition and crystal structure of a mineral gives it unique characteristics.
True OR False
Answers
a rectangular gasoline tank can hold 44.0 kg of gasoline when full. what is the depth of the tank (in m) if it is 0.400 m wide by 0.900 m long? m (b) what is the volume of the tank (in gal)? (it is suitable for a passenger car.) gal
Answers
Volume of the tank (in gal) is 17 gal
Volume is a measure of the occupied three-dimensional space. Often quantified numerically using SI units or by various imperial or US customary units. The definition of length is related to volume.
Given;
Density of gas(ρ)= 0.680*10^3 kg/m^3
ρ=m/v
ρ=m/(h*l*w)
h=44/(0.680*10^3*0.900*0.400)
h=0.179m
Volume of gasoline tank(in m^3) = l*w*h=0.4*0.9*0.179=0.06444m^3
so volume (in gal)= 0.06444/0.003709
=17 gal
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Distance is best described as
Please help!!!!
Answers
Answer:
How much an object has moved
why do we hear explain in concept of waves
Answers
Answer:
SOUND WAVES enter the ear canal and cause the eardrum to vibrate. VIBRATIONS pass through 3 connected bones in the middle ear. This motion SETS FLUID MOVING in the inner ear. ... In the brain, these impulses are CONVERTED into what we "hear" as sound.
Explanation:
I hope this help
car travel 3km due north then 5km east represent these displacement graphically and determine the resultant displacement
Answers
5.83 N-E will be displacement when car travel 3km due north then 5km east.
the resultant displacement =\(\sqrt{3^2+5^2}\)
= 5.83 N-E
Being a vector quantity, displacement has both a magnitude and a direction. The vector (or straight line) distance between an initial and final position is what is meant by this term. Knowing these two places is consequently all that is necessary to determine the resultant displacement.
Calculate the inverse tangent of the ratio of the displacement components in the y- and x-directions to determine the direction of the displacement vector.
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suppose each bulb has resistance r . with bulb c in place, bulbs b and c are in blank and have equivalent resistance blank.
Answers
Suppose each bulb has resistance r . with bulb c in place, bulbs b and c are in blank and have equivalent resistance blank. This implies that if we remove bulb C and replace it with an identical bulb, the resistance of the circuit will remain the same
Suppose each bulb has resistance r. When bulb C is in place, bulbs B and C are in series and have an equivalent resistance of 2r. In a series circuit, the total resistance is the sum of the individual resistances. When bulbs B and C are in series, the current flowing through them is the same. Thus, the total resistance is the sum of their resistances, which in this case is r + r = 2r. In a series circuit, the same current flows through each component. This means that if bulb C has resistance r and is in series with bulb B, the current passing through bulb B is also the same. The voltage across the bulbs is divided between them based on their resistances, and since they have the same resistance r, they receive equal voltage. So, with bulb C in place, bulbs B and C are connected in series and have an equivalent resistance of 2r. This implies that if we remove bulb C and replace it with an identical bulb, the resistance of the circuit will remain the same. Series circuits allow the current to flow through each component one after another, while the voltage divides between them.
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(4. A bus is moving at 25 m/s when the driver steps on the brakes and brings the bus to a stop in
3.0 s.
a. What is the average acceleration of the bus while braking?
b. If the bus took twice as long to stop, how would the acceleration compare with what you
found in part a?
Answers
Answer:
(a) the average acceleration of the bus while braking is 8.333 m/s
(b) if the bus took twice as long to stop, the acceleration will be half of the value obtained in part a. [¹/₂ (8.333 m/s) = 4.16 s]
Explanation:
Given;
initial velocity of the bus, v = 25 m/s
time of the motion, t = 3 s
(a) the average acceleration of the bus while braking
a = dv/dt
where;
a is the bus acceleration
dv is change in velocity
dt is change in time
a = 25 / 3
a = 8.333 m/s
(b) If the bus took twice as long to stop, the duration = 2 x 3s
a = 25 / (2 x 3s)
a = ¹/₂ x (25 / 3)
a = ¹/₂ (8.333 m/s) = 4.16 s
Thus, if the bus took twice as long to stop, the acceleration will be half of the value obtained in part a.
(a) The average acceleration of the bus while braking is 8.333 m/s.
(b) In the case when the bus took twice as long to stop, the acceleration will be half of the value obtained in part a. [¹/₂ of 8.333 m/s) = 4.16 s]
Calculation of acceleration:initial velocity of the bus, v = 25 m/s
time of the motion, t = 3 s
(a) the average acceleration of the bus should be
a = dv/dt
Here,
a is the bus acceleration
DV is a change in velocity
dt is changed in time
So,
a = 25 / 3
a = 8.333 m/s
(b) If the bus took twice as long to stop, the duration = 2 x 3s
So,
a = 25 / (2 x 3s)
a = ¹/₂ x (25 / 3)
a = ¹/₂ (8.333 m/s)
= 4.16 s
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Two identical charges exert a force of 4.5 x 10-2 N and each have charges of 2.5 x 10-6 C, what is the radius?
1.18 x 10-5 m
1.12 m
1.25 m
707.11 m
Answers
Write a hypothesis based on observations and scientific principles.
Answers
Answer:
The answer to your question is that A scientific hypothesis is the initial building block in the scientific method. Many describe it as an "educated guess," based on prior knowledge and observation
Explanation:
A hypothesis also includes an explanation of why the guess may be correct, according to National Science Teachers Association
Proving that, a hypothesis is based on a observations and scientific principals.
You r welcome and have a good day.
An example of a hypothesis based on observation and scientific principles is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.A hypothesis is an informed prediction or a tentative statement about what you think that would occur in a scientific experiment as a result of experience from observations accepted by scientific rules and law.
A hypothesis is a testable statement obtained from the research question but questions cannot be tested directly, it is the proposed relationship between the variables that are tested.
An example of a hypothesis is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.This specifies the direction of the hypothesis because one group is faster than the other.
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How is speed calculated? multiply velocity by displacement divide velocity by displacement multiply distance by time divide distance by time
Answers
Answer:
\(\huge\boxed{Divide\ distance \ by \ time}\)
Explanation:
Speed = Distance / Time
So, to find distance, we actually divide distance by rime.
Answer:
\(\large \boxed{\mathrm{divide \ distance \ by \ time}}\)
Explanation:
Using the formula to calculate speed:
\(\displaystyle \sf speed =\frac{distance}{time}\)
We divide the distance by the time taken to get the average speed.
A Lagrangian Point or gravitational dead zone is found between two stars, at a distance RA = 4020 AU from star A and RB = 20100 AU from star B where 1 AU = 149.6 million km. If the mass of star A is 6.8E43 kg, determine the force exerted on star A by star B. Derive and express algebraic solution in terms of givens: Ra Rb, ma and G.
Answers
The gravitational force is given by Newton's Law:
\(F=G\frac{mM}{r^2}\)We know that in a lagrangian point the foreces cancel out, then in this case we have:
\(\begin{gathered} -G\frac{mM_A}{r^2_A}+G\frac{mM_B}{r^2_B}=0 \\ -\frac{M_A}{r^2_A}+\frac{M_B}{r^2_B}=0 \end{gathered}\)From which we can find the mass of star B:
\(\begin{gathered} -\frac{M_A}{r^2_A}+\frac{M_B}{r^2_B}=0 \\ \frac{M_B}{r^2_B}=\frac{M_A}{r^2_A} \\ M_B=\frac{r^2_B}{r^2_A}M_A \\ M_B=(\frac{20100}{4020})^2(6.8\times10^{43}) \\ M_B=1.7\times10^{45} \end{gathered}\)Now, that we know the mass of star B we can calculate the force exerted on star A by star B:
\(F=G\frac{M_AM_B}{(r_A+r_B)^2}\)plugging the values given we have:
\(\begin{gathered} F=G\frac{M_AM_B}{(r_A+r_B)^2} \\ F=6.67\times10^{-11}\cdot\frac{(6.8\times10^{43}\cdot1.7\times^{45})}{\lbrack(24120)(1.496\times10^{11})\rbrack^2} \\ F=5.92\times10^{47} \end{gathered}\)Therefore, the force exerted on star A by star B is:
\(F=5.92\times10^{47}\text{ N}\)What is ONE variable that will change the amount of POTENTIAL ENERGY
of a box on the floor?
Answers
Answer:
The height or the mass
Explanation:
The one variable that can change the potential energy of a box on the floor is either the height or the mass of the box.
Potential energy is the energy due to the position of a body.
Mathematically;
Potential energy = mass x acceleration due to gravity x height
Therefore, if the mass of the box is changed, the potential energy changes also.
If the position of the box is changed by raising it up, the potential energy changes
Rank the main causes of death among young children, from the highest incidence to the lowest incidence. ____
Answers
Unintentional injuries caused by accidents are the number one killer of children and teenagers.
What causes the majority of adolescent deaths?
A little over half of all adolescent fatalities are caused by accidents. Over one-third of all fatal accidents fall under the category of motor vehicle fatalities, which is the top cause of death for teens. Non-Hispanic black male teens have the highest death rate.
The top causes of mortality for children under 5 years old continue to be congenital anomalies, pre-term birth complications, birth asphyxia, and other infectious diseases like pneumonia, diarrhea, and malaria. According to a recent study, homicide is the top cause of death for children in the United States, and the total rate has grown by 4.3% annually on average.
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Which structure reduces friction between joints?
Answers
Answer:
The cartilage is the structure that reduces friction between joints.
Explanation:
Cartilage is the tissue between the bone joints. They are composed of several membranes and cellular groups. One of them called synovial membrane which provides lubricant to the edges of tissue that are touched by the bones. Reducing the friction and absorbing it so the body can move without obstacles.
why is MA always less than VR?
Answers
Answer:
\( \boxed{ \bold{ \boxed{ \sf{see \: below}}}}\)
Explanation:
MA ( Mechanical Advantage ) is always less than VR ( Velocity Ratio ) because MA is reduced by friction but VR is not affected by friction.
Hope I helped!
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the instrument used in physics laboratory
Answers
Answer:
Glasses, test pieces, scales, lenses, heat lamps, magnets, balls, garlands, slopes, etc. Physics labs may have advanced equipment such as voltmeters, electronic endoscopes, potentiometers, telescopes, microscopes, and spectrometers. electromagnet etc.
Hope that helps!
<3
Answer:These may include glass beakers, test tunes, items scales, lenses, heat lamps, magnets, balls, pendulums inclined planes etc. A physics lab may also include some more sophisticated equipment, such as voltammeter, electroscope, potentiometer, telescopes, microscopes, spectroscopes; electromagnets etc.
Explanation:
when was the last time that all four of the gas giant planets were aligned on the same side of the sun?
Answers
The last time all four gas giant planets – Jupiter, Saturn, Uranus, and Neptune – were aligned on the same side of the Sun was in 1981.
Planetary alignment refers to the scenario when planets in our solar system form a straight line in relation to the Sun. This phenomenon is relatively rare due to the varying orbital periods of these planets.
Jupiter takes about 11.9 Earth years to complete one orbit around the Sun, while Saturn's orbit takes approximately 29.5 Earth years. Uranus and Neptune have even longer orbital periods, taking around 84 and 165 Earth years, respectively. These differences in orbital periods mean that true alignment of all four gas giants is not a frequent occurrence.
It is important to note that such alignments do not have any significant effects on our daily lives or Earth's environment. Although some people may associate planetary alignments with disasters or astrological predictions, these claims lack scientific basis.
In summary, the last time all four gas giant planets were aligned on the same side of the Sun was in 1981. This event is relatively rare due to the planets' differing orbital periods, and it does not have any notable impact on Earth or its inhabitants.
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a motorboat that normally travels at 10 km/h in still water heads directly across a flowing river (at a right angle to the river flow). if the river also flows at a rate of 10 km/h, what will be boat's velocity relative to the shore?
Answers
The boat's velocity relative to the shore is approximately 14.1 km/h at an angle of 45° to the river flow.
Using the Pythagorean theorem, we can find the magnitude of the resultant velocity:
Resultant velocity = √(10² + 10²) = √200 ≈ 14.1 km/h
To find the direction of the resultant velocity, we can use trigonometry:
Angle = tan⁻¹(opposite/adjacent)
Angle = tan⁻¹(10/10) = 45°
Resultant velocity is the vector sum of two or more velocities acting on an object. It is the total velocity that an object experiences due to the combined effects of all the individual velocities acting on it. Resultant velocity is a vector quantity, which means that it has both magnitude and direction.
When two velocities act on an object, they can either add or subtract depending on their directions. If the velocities are in the same direction, they add up to create a larger velocity, resulting in a greater speed. If the velocities are in opposite directions, they subtract from each other, resulting in a slower speed. If the velocities act at an angle to each other, the resultant velocity will be a combination of their horizontal and vertical components.
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How can you use ohms law in the form of y=mx+c to calculate the average resistance of an ohmic conductor
Answers
To use Ohm's Law in the form of y=mx+c to calculate the average resistance of an ohmic conductor, you need to understand that Ohm's Law is V=IR, where V is voltage, I is current, and R is resistance.
In this case, y represents voltage (V), m represents resistance (R), x represents current (I), and c is the constant (0 for an ohmic conductor).
Now, you can rewrite Ohm's Law as y=mx+c or V=IR+0. To find the average resistance, you'll need to collect data on voltage (V) and current (I) at various points.
Then, plot these points on a graph with voltage (y-axis) against current (x-axis). The slope (m) of the best-fit line through these points will give you the average resistance (R) of the ohmic conductor.
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PLEASE ANYONE CAN HELP ME !E.x/A block of metal has a volume of 0.09 m3
Calculate the buoyant force when it's Completely
immersed in brine ? density = 1200 kg/m3
Answers
Answer:
B = 1058.4 N
Explanation:
Given that,
The volume of a metal block, V = 0.09 m³
The density of fluid, d = 1200 kg/m³
We need to find the buoyant force when it's Completely immersed in brine. The formula for the buoyant force is given by :
\(B=\rho gV\)
g is acceleration due to gravity
\(B=1200\times 9.8\times 0.09\\\\B=1058.4\ N\)
So, the required buoyant force is 1058.4 N.
Temperature is a measure of how hot or cold
something is but need
Explanation
Answers
Answer:
Temperature is a measure of the average kinetic energy of the particles in an object.
Using the modern celcius system of temperature measurement, We. an easily determine how hot or cold it is. It was also know as Centigrade. This is because it is based on the freezing and boiling points of water with 100 degrees between those temperatures.
A car travels a distance of 98 meters in 10.0 seconds. What is the average speed of the car during this 10.0 second interval?
Answers
Answer:
9.8 m/s
Explanation:
Distance Traveled = 98 m
Total Time = 10 s
Average Speed = Total Distance/Total Time
= 98/10
= 9.8 m/s
Hope this helped...
A tsunami can travel over 970 kilometers in an hour. If it’s been 3 hours since the tsunami was created, how far has it traveled?
Answers
Answer:
2910
Explanation:
970 × 3. 970 in one hour × 3 hrs. 2910 kilometers
Convert 250mm to kilometers using conversion factor
Answers
Answer:
0.00025 kilometers
Explanation:
divide the length value by 1e+6
Answer:
250 mm = 0.00025 km.
Explanation:
250 mm equal 0.00025 km
Conversion details
To convert mm to km use the following formula:
1 mm equals 0.000001 km
So, to convert 250 mm to km, multiply 0.000001 by 250 i.e.,
250 mm = 0.000001 * 250 km = 0.00025 km
(hope this helps can i plz have brainlist :D hehe)
a 66-kg skier starts from rest at the top of a 1200-m-long trail which drops a total of 170 m from top to bottom. at the bottom, the skier is moving 11 m/show much energy was dissipated by friction?
Answers
The energy dissipated by friction is approximately 105663 Joules when a 66-kg skier starts from rest at the top of a 1200-m-long trail which drops a total of 170 m from top to bottom.
A skier with a mass of 66 kg starts from rest at the top of a 1200 m trail that drops 170 m. At the bottom, the skier is moving at a speed of 11 m/s. To calculate the energy dissipated by friction, we need to determine the change in potential energy and the change in kinetic energy.
The change in potential energy (ΔPE) can be calculated using the formula ΔPE = mgh, where m is the mass of the skier, g is the acceleration due to gravity (approximately 9.8 m/s²), and h is the vertical distance (170 m). Substituting the given values, we get ΔPE = (66 kg) × (9.8 m/s²) × (170 m) = 109656 J.
The change in kinetic energy (ΔKE) can be calculated using the formula ΔKE = (1/2)mv², where m is the mass of the skier and v is the final velocity (11 m/s). Substituting the given values, we get ΔKE = (1/2) × (66 kg) × (11 m/s)² = 3993 J
The energy dissipated by friction is the difference between the change in potential energy and the change in kinetic energy: Energy dissipated = ΔPE - ΔKE = 109656 J - 3993 J = 105663 J.
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how is geothermal energy trapped? state a draw back of this kind of energy.
Answers
Answer:
Geothermal energy can be trapped using geothermal plants that utilizes steam escaping from the earth surface to make electricity.
The limitations include :
depletion of the geothermal sourcehigh costs of investments required for geothermal systemsExplanation:
Geothermal energy originates in form of heat/steam escaping from the inner parts of the earth surface. The steam trapped is converted to electricity through turbines. The hot water pumped by heat pumps can be used to heat homes or for heating purposes in industries.
The limitations of geothermal energy are high initial capital costs for installing the systems, depletion of geothermal sites after sometime, environmental concerns due to greenhouse gases emissions and land requirements for geothermal projects.