Answer:
Friction can be minimized by using lubricants like oil and grease and by using ball bearing between machine parts. A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant. Fluid friction can be minimized by giving suitable shapes to the objects moving in the fluids.
Explanation:
hope it helps
5. What is the frequency of a sound wave when the speed of the sound is 340 m/s and has a wavelength of 1.21 m? 263 Hz 281 Hz O 328 Hz O 346 Hz
Answer:
281 Hz
Explanation:
I am so so sorry if this is wrong. But good luck and have a good day
What would happen if you went through a black hole. I will give brainliest for a correct answer.
Answer:
You would get spagettified. Streched into a very long noodle version of yourself.
Name a track field event. Describe the event. Is it running. jumping. or throwing even?(there wasn’t an option for gym but here)
Answer:
Javelin Throw (My favorite event)
Explanation:
Javelin Throw is a spear about 8 feet long and is used to throw for maximum distance.The participant runs first within a predetermined area and then throws the javelin.
If you have any questions revolving around this this topic,feel free to ask me and I will be happy to help,Good luck! :)
Suppose you needed to push a 1,500-N sofa up a frictionless ramp with a 30° angle. How much force would you have to apply to the sofa?Show your work below.
Answer:
1299N
Explanation:
GIven data
Weight W= 1500N
Angle Ф= 30°
The applied force up the frictionless ramp is gotten by applying the formula below
F= WcosФ
substitute
F=1500 cos 30
F = 1500*0.8660
F= 1299N
Hence the applied force is 1299N
Select the correct answer. What step can an organization take to improve its culture? A. conduct regular development programs for employees B. employ people belonging to a certain age group only C. keep its number of employees to a minimum D. employ people with similar financial backgrounds
Answer:
A
Explanation:
you can keep all current employees and improve culture
Explain why a sound becomes louder as you move closer to the source of the sound.
Answer:
The wavelength of frequency of the sound are closer to each other
Or
The frequency of the sound increases as it moves towards you
What chemical formula did early instigators assume for water?
Answer:
Explanation:
Investigators thought this meant that oxygen was eight times more massive than hydrogen. They presumed the chem-ical form-ula for water to be H-O
Hope this helped!!! .
Help please:Calculate the mechanical energy of a bird flying at a speed of 10 m / s at an altitude of 15 m. If its mass is 150 g and the influence of gravitational force is 9.81 m / s²?
Mass of the bird(m) = 150 g = 0.15 kg
Speed (v) = 10 m/s
Kinetic Energy = [tex]\frac{1}{2}m v^{2} = \frac{1}{2} 0.15 (10)^{2}[/tex] = 7.5 J
Altitude (h) = 15 m
Gravitational Potential Energy = (0.15)(9.81)(15) = 22.0725 J
Mechanical Energy = Kinetic Energy + Potential Energy = 7.5 + 22.0725
= 29.5725 J
A factory has 1200 workers of which 720 are male and the rast are female what percent of workers are female
Answer:
Percent of Female Workers = 40%
Explanation:
The percentage of the female workers in the given group of workers can be easily found by the following formula:
[tex]Percent\ of\ Female\ Workers = \frac{No.\ of\ Female\ Workers}{Total\ No.\ of\ Workers}\ x\ 100\%[/tex]
where,
Total No. of Workers = 1200
No. of Female Workers = Total Workers - No. of Male Workers
No. of Female Workers = 1200 - 720 = 480
Therefore,
[tex]Percent\ of\ Female\ Workers = \frac{480}{1200}\ x\ 100\%[/tex]
Percent of Female Workers = 40%
What is the answer for this question?
Answer:
6 watts
Explanation:
hours against watts
I'm not sure though
who needs more body building food, a father or a child? Why?
Answer:
A Child has a fast metabolism since it is growing fast it needs Food, Liquids, Sleep.
Explanation:
A father has already Grown and is only gaining age.
So we can Conclude that A child needs more body building food.
Explain how seafloor spreading is like a conveyor belt
Answer:
In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crst is added. As a result, the ocean floors move like conveyor belts, carrying the continents along with them.
Explanation:
How was our galaxy formed?
Answer:
according to big bang theory our galaxy was formed 13billion years ago and then made the stars and galaxies we see today. ... The universe began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a "singularity).
What is the galaxy that our solar system is located in?
Answer:
I think the answer is Milky Way
I hope this Will help you
Manny walked a total of 3 miles. The reference point used to calculate the total distance that he walked was the same as the ending point. Which describes where Manny most likely walked?
Correct question:
Manny walked a total of 3 miles. The reference point used to calculate the total distance that he walked was the same as the ending point. Which describes where Manny most likely walked?
a. from the bottom of a hill to the top
b. on a circular nature trail
c. on a sidewalk from his house to the mall
d. from the beginning of a straight track to the end
Answer:
b. on a circular nature trail
Explanation:
As it is mentioned that Manny that his reference point from where she started is same as ending point meaning that she moved in a circular path making point B correct answer.
Answer:
on a circular nature trail
Explanation:
In the example of a hammer hitting a nail, which is hit harder? the nail, the hammer, or they both hit equally?
Answer:
both hit qaulity
Explanation:
Newton's Third Law says that every interaction involves two forces - in this case (1) hammer pushes nail, and (2) nail pushes hammer. When a hammer hits a nail, Newton's Third Law says that the force that the hammer exerts on the nail is exactly the same size as the force the nail exerts on the hammer.
CAN U HELP PLZZ? ;(
A 12kg aluminum box is sliding along a horizontal steel surface while experiencing a rightward applied force of 60N. The box has a displacement of 20m. Is this box in Equilibrium? *
A.)Yes, because the net force & net work is more than 0N
B.)Yes, because the net force & net work equals 0N
C.)No, because the net force & net work is more than 0N
D.)No, because the net force & net work equals 0N
E.)Need more info
Qs 5 pleaseeee help!!!
Answer:
Ok, first is important that you understand how the heat radiation works.
All the objects that have some heat energy in them, radiate some of that energy in the form of electromagnetic waves.
Particularly, the Sun radiates a lot of energy (at the point that if you step under the sunlight, you can feel on your skin the heat that comes from the sun, this is due to radiation).
Now, suppose that you have a thin coat of water over you, then the material that gets impacted by that radiation will be the water and not you, and then the energy is dissipated (some of the energy goes to your body and some go to the air)
This is one way in which spraying water over themselves helps the elephants to keep them cool.
Another way in which heat can be transferred is by conduction.
When you have a hot object and a cool object, and you put them together (so the objects touch each other), the heat will flow from the hotter object to the cooler object until both objects have the same temperature.
Then if the elephant body temperature is larger than the temperature of the water that the elephant sprays over his body, when the water touches the body some of the heat in the elephant body will be transferred to the coat of water, and in this way, the temperature of the elephant's body decreases.
These are the two ways we wanted to find.
100 cm cubic of water is mixed with 50 centimetres cubic of concentrated acid of density 1.2 gram per centimetre cube assuming no change in volume find the average density of the mixture the density of water is 1.0 gram per centimetre cube
Answer:
Average Density = 1.07 g/cm³
Explanation:
The average density of the whole mixture is given by the following formula:
[tex]Average\ Density = \frac{mass\ of\ whole\ mixture}{volume\ of\ whole\ mixture}[/tex]
where,
volume of whole mixture = volume of water + volume of acid
volume of whole mixture = 100 cm³ + 50 cm³ = 150cm³
mass of whole mixture = mass of water + mass of acid
mass of whole mixture = (volume of water)(density of water) + (volume of acid)(density of acid)
mass of whole mixture = (100 cm³)(1 g/cm³) + (50 cm³)(1.2 g/cm³)
mass of whole mixture = 160 g
Therefore,
[tex]Average\ Density = \frac{160\ g}{150\ cm^3}[/tex]
Average Density = 1.07 g/cm³
14. Earth goes around the sun at an astonishing speed of about -hold your breath-107 460 643 meters per second. *
1 point
True
False
15. A car is moving around an oval track at a constant speed of 20km/h. Is it accelerating? *
1 point
True
False
Answer: 14 speed of Earth around Sun I see 30 km/s. FALSE
15. Because car is in circle track, direction of velocity changes
And car is in accelerating motion. direction of acceleration points to
The centre of the circle. RIGHT
Explanation:
how does electricity work?
Answer:Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. ... Once you can control the direction the electrons are going, you can use them to power or charge anything from a light bulb to your TV to your electric car.
Explanation:trust
A 12kg aluminum box is sliding along a horizontal steel surface while experiencing a rightward applied force of 60N. The box has a displacement of 20m. What is the Net Force acting on the box? *
A.)60N
B.)117.72N
C.)4.67 N
D.)-55.33N
at what point does the skater have the least amount of KE kinetic energy?
Answer:
I think it's D
Explanation:
because kinetic basically means moving and potential mean sitting still so ig it's c or D
under which conditions do both convex and concave mirrors form virtual images state whether or not each can form a real image if the mirror can form a real image describe how this occurs
Answer:
Explanation:Concave mirrors can make a real image.when the object is away from the mirror it is called real image and when the object is closer to the mirror it is called virtual mirror.
Joni plays a scale on her clarinet. As she plays from low notes to high notes, what happens to the sound waves that the clarinet creates?
Answer:
The answer is "The frequency of the sound waves increases".
Explanation:
Its most oscillating their frequency waves, therefore higher the vibration we hear. However you see, sound frequency is determined through the oscillation of electrical signals while moving to our ears, which implies that perhaps the audio medium, which usually is air, makes a distinction between compression to spreading. It's the end of the communication as the frequency rises.
19. Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference.
Which of the following best
describes the waves a moment after the waves meet and coincide?
The waves no longer exist.
The waves continue unchanged.
The waves reflect and travel backward.
A single wave continues along the rope.
a.
b.
c.
d.
Answer:
B
Explanation:
I have no questions.
Answer: happy Ramadan
Explanation: thanks
Imani stirs a cup of hot sencha tea with a cool silver spoon. She notices that the silver spoon becomes warmer. What energy change occurs when the silver spoon is added to the hot cup of sencha tea?
A. The spoon adds its cold to the hot tea
B. The hot tea absorbs the heat from the spoon
C. The cool spoon causes the water to expand thus cooling it
D. The tea loses heat to the spoon causing the spoon to become warmer
Answer:
D. The tea loses heat to the spoon causing the spoon to become warmer
Explanation:
When the silver spoon at a lower temperature than the tea, is added to the tea, it makes thermal contact. Hence, the heat transfer starts between the two until the equilibrium is reached. We know that the heat transfer takes place from the body with a higher temperature to a body with a lower temperature. As a result, the body with higher temperature loses heat and its temperature lowers down. While the body with a lower temperature gains heat and its temperature rises.
Therefore, the correct option is:
D. The tea loses heat to the spoon causing the spoon to become warmer
Explain one inference scientists made about the interior of the Earth based on seismic waves. Use the words S & P waves in your answer. Use the word refract/bend in your answer
Answer:
"An earthquake radiates P and S waves in all directions and the interaction of the P and S waves with Earth's surface and shallow structure produces surface waves. Near an earthquake the shaking is large and dominated by shear-waves and short-period surface waves." please rephrase this in your own words.
Explanation:
Im not sure if this helps but credits to: eqseis.geosc.psu.edu › Notes › waves_and_interior
the body acts on a force of 3N with the shoulder 20 cm. What is her moment?
Answer:
0.6Nm
Explanation
Given
Force = 3N
Distance = 20cm = 0.2m
Moment = Force * perpendicular distance
Substitute
Moment = 3N * 0.2
Moment = 0.6Nm
Hence her moment is 0.6Nm