Answers
Related Questions
A machine has an efficiency of 15% . If the energy inputs is 300 joules, how much useful energy is generated
Answers
Answer:
you made with your performance, and then consider whether you would do anything differently if yo
Explanation:
The useful energy generated by the machine having an efficiency of 15% and an energy input of 300 J is 45 J
From the question given above, the following data were obtained:Efficiency = 15% = 0.15
Work input = 300 J
Work output =?The useful energy generated (i.e work output) by the machine can be obtained as follow:
[tex]Efficiency = \frac{workout}{workin} * 100\\\\0.15 = \frac{Workout}{300}[/tex]
Cross multiply
Work output = 0.15 × 300
Work output = 45 JTherefore, the useful energy generated by the machine is 45 J
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please can anybody tell me what is this lab equipment
Answers
Answer:
hii there
its a test tube holder
Explanation:
hope it helps
Ti3N + MgO → Mg3N2 +Ti2O balance chemical equation
Answers
We have that the balanced chemical equation is mathematically given as.
2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2O
From the question we are told
Ti3N + MgO → Mg3N2 +Ti2O balance chemical equation.
Generally the way to balance an equation is by making all elements present on the Left hand side(LHS) same with the right hand side RHS.
Therefore
The equation is mathematically given as.
Ti_3N + MgO → Mg_3N_2 +Ti_2OWe consider the Left hand side(LHS) first.
2Ti_3N + 3MgO → Mg_3N_2 +Ti_2OThen we consider the right hand side RHS.
2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2OTherefore the balanced chemical equation is mathematically given as.
2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2OFor more information on this visit
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When developing an experimental design, which action could a scientist take to improve the quality of the result?
Answers
Answer: You can Identify any biases about the answer to the scientific question.
Explanation:
the density of free electron in a copper conductor is 8.5×10^28m-3. how long does an electron take to dift from one end of a wire 3.0m long to it's other end?
Answers
Answer:
missing information what is your cross-section and current in Amperes
Weight of an object remains same on the Earth and the Moon.
true or false?
Answers
Weight is related to the strength of gravity, meaning, the object doesn’t remain the same on the earth and the moon since it can change.
2
8
1 point
What is the name of the element with 2 energy levels and 6 valence electrons?
Sulfur
Oxygen
Barium
Chromium
G
9
1 point
Answers
Answer:
oxygen is the right answer.
5. Sarah is standing 32.0 m away from Jason. If Sarah throws a snowball at a 45 degree
angle for maximum distance, what velocity must the snowball have to hit Jason directly.
(Assume Jason and Sarah are about the same height so that if she throws the snowball
from head level, it will hit Jason in the head.)
Answers
Answer:
Explanation:
If air resistance is ignored and assume UP and Toward Jason are the positive directions.
horizontal analysis
d = (vx₀)t
t = d/vx₀
horizontal analysis
0 = vy₀t + ½gt²
0 = vy₀(d/vx₀)+ ½g(d/vx₀)²
as vy₀ = v₀sin45 and vx₀ = v₀cos45 and are equal.
0 = d + ½g(d²/v₀²cos²45)
-d = ½g(d²/v₀²cos²45)
-dv₀² = ½g(d²/cos²45)
v₀² = -½g(d/cos²45)
v₀² = -½(-9.81(32.0/cos²45)
v₀² = 313.92
v₀ = 17.717787...
v₀ = 17.7 m/s
What happens when acetate rubs with wool
Answers
When a Cellulose Acetate rod is rubbed with a woolen duster, friction occurs, rubbing loosely held electrons from the rod onto the duster. So, this time, the rod loses electrons. Since the Acetate rod now has fewer electrons than protons it has become positively charged. Hope this helps!
Answer:
The charge becomes positive.
Explanation:
When rubbed with cellulose acetate the charge of the fur/wool will become negative.
Energy can be transformed from one form to another. The diagram shows one such process.
Which energy transformation is represented in the diagram?
nuclear to thermal and radiant
nuclear to electrical and chemical
chemical to nuclear and radiant
chemical to electrical and nuclear
Answers
Answer:
b
Explanation:
Answer
nuclear to electrical and chemical
Explanation:
Energy can be transformed from one form to another. The diagram shows one such process.
Which energy transformation is represented in the diagram?
nuclear to thermal and radiant
nuclear to electrical and chemical
chemical to nuclear and radiant
chemical to electrical and nuclear and it is ovisly b
A car drives around a racetrack for 30 seconds. What do you need to know to
calculate the instantaneous speed of the car at a given point?
A. The total displacement of the car
B. The time needed to drive 1 lap
C. The slope of the car's position-time graph
D. The average speed of the car
Answers
Answer: the slope of the cars position-time graph
Explanation:
Just took the test
Tarea del 21 de octubre 2021 del 5 de primaria
Answers
Answer:xss
zzz
Explanation:
zzz
During which section was the person moving at the highest speed? What was their speed? Defend your answer.
Answers
Where's the person that the question is talking about?
Answer:
d was
Explanation:
If your hammer develops a loose head, you can tighten it by banging
it on the ground. A little physics secret though - it's better to bang
the hammer head up rather than head down. Explain, using inertia.
Answers
weight from the hammer head makes the inertia better making it better with the head up it. the body has less weight the inertia force isn't as good. (or something like that.)
help me with b and d please
A 65 kg diver stands still on a tower, 100 m above the water
(a) Calculate the gravitational potential energy of the diver, relative to the height of the water. Assume the gravitational field constant is 9.8 N/kg
(b) The diver reaches the surface of the water at a speed of 14 m/s. Calculate the diver's kinetic energy
(c) Compare your answers to (a) and (b). Explain your comparison using concepts learned in this course.
Assume there is no air resistance during the dive (d) Calculate the speed of the diver 5.0 m above the water.
Answers
Following are the solution to the given points:
Given:
[tex]\to mass(m)= 65\ kg\\\\\to h=10.0 \ m\\\\\to g=9.8 \ \frac{m}{s^2}[/tex]
To find:
gravitational potential energy(GPE)=?
kinetic energy(KE)=?
concept=?
v=?
Solution:
For point a:
[tex]\to GPE= mgh[/tex]
[tex]= 65 \times 10 \times 9.8\\\\ = 6370 \ J\\\\[/tex]
For point b:
[tex]\to KE=\frac{1}{2} m v^2\\\\[/tex]
[tex]=\frac{1}{2} \times 65 \times 14^2 \\\\=\frac{1}{2} \times 65 \times 14 \times 14 \\\\= 65 \times 14 \times 7 \\\\=6370\ J\\[/tex]
For point c:
As we've seen, there really is no force acting, and the mechanic KE: GPE is used. Because legitimate is conserved. Home energy loss means GPE must be equal to KE gain.
For point d:
A diver has risen 5 feet above the surface. As a result, according to the energy conservation law:
[tex]\to U_i + K_i= U_f + K_f\\\\ \to mg \times h + 0 = mg \times \frac{h}{2} + \frac{1}{2} m v^2\\\\ \to 9.8 \times 10 = 9.8 \times 5 + \frac{v^2}{2}\\\\\to 9.8 \times 10 - 9.8 \times 5 = \frac{v^2}{2}\\\\\to \frac{v^2}{2} =9.8( 10 - 5) \\\\\to v^2 =9.8( 10 - 5) \times 2 \\\\\to v^2 =9.8\times 5 \times 2 \\\\\to v^2 =98 \\\\\to v =98\ \frac{m}{s^2} \\\\[/tex]
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Which statement describes how nuclear power generation systems work?
O A.
The heat for the electricity generation process comes from nuclear fusion.
ов.
Electricity is generated directly when two atoms split into smaller ones.
O C.
The heat for the electricity generation process comes from nuclear fission.
OD.
Electricity is generated directly when two atoms join together.
Answers
Answer:
c- heat for electricity generation process comes from nuclear fission
Explanation:
nuclear fission is splitting of atoms to release energy held at nucleus of atoms
A physics teacher walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North. What is the distance and displacement of this teacher?
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A heavy train of mass 200 tonnes has a maximum speed of 20m/s up a hill inclined at 1.15⁰ to the horizontal when the engine is working at 800 kwatts. What is the resistance to the motion of the train?
Answers
Answer:
https://www.brainlyanswer.com
Explanation:
click the link the answer is in the link:)
Answer:
train to busan
shadow train
the horror train
train game
Evaluate tan(24°).
ОА. 1.36
В. 0.45
Ос. 0.41
OD. 0.91
Answers
Answer:
B. 0.45
Explanation:
You just need to plug this into a calculator.
The function of which system is to release energy from food for cells to use and to take oxygen into the blood and to remove carbon dioxide?
Digestive
Circulatory
Respiratory
Excretory
Answers
Why might a scientist use a physical model of a plant cell instead of studying
a cell directly?
A. A model can be used for things that are too hot to handle easily.
B. A model can be used for things that are too small to see clearly.
C. A model can be used for things that are too large to study directly.
D. A model can be used for things that are too simple to study
directly
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B. A model can be used for things that are too small to see clearly
I NEED THIS ASAP PLEASE
Answers
Answer:
wash or dry cleanmeasuring tapeupper arm girthtapeheightmeasuring tapebistlinewaistlineabdomenhip or seatExplanation:
please mark brainiest
a ray of light is incident in water at angle of 30 on water air plane mirror surface .find the angle of refraction in air.
Answers
Angle of incidence=angle of refraction
[tex]\\ \sf\longmapsto sin\:i=sin\:r[/tex]
sin i=30°[tex]\\ \sf\longmapsto sin\:r=30°[/tex]
When the sun heats up the suface of the water, the water
Answers
Answer:
In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. Once evaporated, a molecule of water vapor spends about ten days in the air.
Explanation:
someone pls helpp meeee
Answers
Answer:
the first answer is correct
A car stops from a speed of 15 m/s in 3 s. How far did it go while stopping?
Answers
Answer:
5m/s
Explanation:
15m/s ÷ 3s = 5m/s
4. In which of the following circuits will the bulb glow?
a) switch ON, a connecting wire broken
b) switch OFF
c) switch ON, no broken wire
d) switch ON, one of the wires replaced by a
rubber band
Answers
Answer:
I believe is C.
Explanation:
its quite obvious:)
A hunter is practicing hitting a target that is down range. If the arrow leaves the bow at a
velocity of 26 m/s at an angle of 40 degrees above the horizontal,
a. Calculate how much time it takes for the arrow to return to the bow level.
b. Find out how far down range the arrow goes.
c. What is the maximum altitude the arrow reaches?
Answers
Answer:
What kind of bow Is he using
I WILL GIVE YOU THE BRAINLEST ANSWER AND 100 POINTS
Choose two of the following technological devices. For each one, complete the required research and write about how the devices use wave behavior to transmit or capture information.
Microwave
Radio
Remote control
WiFi
X-ray
Gamma radiation
Device 1
Describe the device and its function.
What form of electromagnetic radiation does it use?
Describe the frequency and wavelength range of this type of electromagnetic wave.
Using the information above and details from your research, write a paragraph of five sentences or more explaining how the device uses the behavior and characteristics of the electromagnetic wave to function. Remember the writing tips from the lesson, and use facts and details to explain your topic sentence.
You must include citations for all reliable sources used. Include citations from three or more reliable sources.
Device 2
Describe the device and its function.
What form of electromagnetic radiation does it use?
Describe the frequency and wavelength range of this type of electromagnetic wave.
Using the information above and details from your research, write a paragraph of five sentences or more explaining how the device uses the behavior and characteristics of the electromagnetic wave to function. Remember the writing tips from the lesson, and use facts and details to explain your topic sentence.
You must include citations for all reliable sources used. Include citations from three or more reliable sources.
Answers
The way a microwave uses wave behavior to transmit information is for point-point communication for small-sized antennas.
The form of electromagnetic radiation it uses is electrical and mechanical energy.
What is a Microwave?This refers to the form of electromagnetic radiation that has a range of 1m-1mm.
The way a radio uses wave behavior to transmit information is for wireless transmission of sound, typically for maritime and aircraft travel.
The form of electromagnetic radiation it uses is a radio wave.r
The range of the radio is 100–10 km at 3–30 kHz
Read more about electromagnetic radiation here:
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#SPJ1
Answer:
.
Explanation:
Three boxes are stacked on top of a cart. As the cart is moving, it comes to an abrupt stop. The boxes fall forward off of the cart. Explain why the boxes fell forward.