PLEASE HELP!!
Identify how each machine changes the way work is done so as to
be useful.
Bicycle
Ax blade
Car jack
Answers
When you pedal a bike with chains attached to it, the wheel spins as you exert force from your body into the pedaling. The chains are connected to an almost circular shape.
How machine changes the way of work?Contrary to popular assumption, using machines does not result in more work being done. They merely alter the method of operation. Machines make work easier by increasing the amount of force used, extending the distance over which the force is exerted, or changing the direction of the force.
Simple machines are helpful because they lessen effort or enable humans to execute things that would normally be beyond their capacity. The wheel and axle, pulley, inclined plane, screw, wedge, and lever are examples of simple devices that are frequently employed.
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Related Questions
A narrow slit is illuminated with sodium yellow light of wavelength 598 nm. If the central maximum extends to latex: \pm30^\circ± 30 â, how wide is the slit?.
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Answer:
because of the gravity of the earth
NO LINKS! What are the definitions of initial horizontal velocity and initial vertical velocity? Please help! This like is my 10th time asking this question because many people have been scamming me.
Answers
Explanation:
Initial horizontal velocity
If a projectile is launched at an angle to the horizontal, then the initial velocity of the projectile has both a horizontal and a vertical component. The horizontal velocity component (vx) describes the influence of the velocity in displacing the projectile horizontally.
The initial horizontal velocity can also be determined by measuring the diameter d of the ball and dividing by the time t that it takes for the ball to move across the photogate. That is Vo = d/t.
Initial vertical velocity
Vertical velocity refers to the speed of an object's movement in a vertical direction.The initial vertical velocity is the vertical component of the initial velocity: v 0 y = v 0 sin θ 0 = ( 30.0 m / s ) sin 45 ° = 21.2 m / s .
Please I need help fast <3
Answers
Answer:
Where is the picture send again please
Explanation:
Which of toby's answers is a correct description of what happens when a 1-kg cart traveling at 1 m/s collides inelastically with another 1-kg cart at rest?.
Answers
Answer:
hi I don't know sorry sorry forgive me
Explanation:
sorry
If you blow up a balloon, tie it off, and release it, it will fall to the ground.
Why does it fall instead of float?
NO LINKS YA FILTHY VERMINS
Answers
Answer:
carbon dioxide (what you are blowing up the balloon with) is a heavy gas. so when you fill the Balloon with it, the balloon will not float. helium is a light gas and floats. gravity takes another. part in this
Please answer correctly.
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Urgent !!!
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A block requires an applied force of 20N to begin moving it to the right. What is the maximum static friction?
a. Less than 20 N
b. Exactly 20 N
c. Just over 20 N
d.Twice as much as the block's weight
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Answer:
A.
Explanation:
Thats my answer
Please make me branlies answer
why the speed of sound in solid and liquid is not signoficantly affected by temperature
Answers
Explanation:
because the molecules are closer together and more tightly bonded in solids
What does 1 N = ? please I need help?
Answers
[tex]1~N = 1~ \text{kg~ms}{^{-2}[/tex]
1 N = 1 kg × m/s²
One Newton is equal to 1 kilogram multiplied by meter by second squared.
_____
Hope it helps ⚜
Describe the changes that occur inside a helium balloon as it rises from sea level
Answers
Answer:
The balloon expands in the number of particles per cubic centimeter decreases. This happens because as it expands there is a decrease in the density of area. The Dead Sea is a solution that is so dense that you easily float on it.
What is/are the difference between wavelength and spectral lines?
Answers
Answer:
Definition of spectral line: one of a series of linear images formed by a spectrograph or similar instrument and corresponding to a narrow portion of the spectrum of the radiation emitted or absorbed by a particular source.
Definition of Wavelength: can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. ... Wavelength is inversely proportional to frequency. This means the longer the wavelength, lower the frequency.
So, the spectrum is the range of wavelength in visible light. While, wavelength is the length of a wave.
Explanation:
I hope this helps!
The efficiency of a motor is 15%. The student calculated the useful output energy transfer is 1.20J. Calculate the total input energy transfer.
Answers
Answer:
[tex]8.0\; \rm J[/tex].
Explanation:
The efficiency of a machine is the ratio between the useful output and the energy input:
[tex]\begin{aligned}\text{efficiency} &= \frac{\text{useful output}}{\text{energy input}} \times 100\%\end{aligned}[/tex]
Rearrange this equation to find energy input in terms of efficiency and useful output:
[tex]\displaystyle \text{energy input} = \frac{\text{useful output}}{\text{efficiency} / (100\%)}[/tex].
Substitute in the values: [tex]\text{useful output} = 1.2\; \rm J[/tex] and [tex]\text{efficiency} = 15\%[/tex]. Evaluate to find the value of [tex]\text{energy input}[/tex]:
[tex]\begin{aligned} \text{energy input} &= \frac{\text{useful output}}{\text{efficiency} / (100\%)} \\ &= \frac{1.20\; \rm J}{15\% / (100\%)} \\ &= 8.0\; \rm J\end{aligned}[/tex].
(Rounded to two significant figures as in the value of efficiency.)
Global warming means that
Answers
Answer:
The earth is heating up.
Explanation:
This is due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.
choose 3 ways to keep our bodies healthy
. play in the mud
.sanitize your hands
. break a window
. eat vegies
. eat burgers
. take daily showers
. bite your arm
(i already know it)
Answers
This was fun to answer.
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NO LINKS AND NO STEALING POINTS,
PLS ANSWER IF YOU KNOW FOR SURE WHAT IT IS!!!
THE QUESTION IS IN THE PICTURE ATTACHED!
Answers
Answer:
B. between carbon and oxygen
Explanation:
formaldehyde has a carbon atom that has single bonds with two hydrogen atoms on both sides, and it has a double bond with oxygen.
Answer:
The placement of the double bond is between carbon atom and oxygen atom
this same question was for me so I did and got it correct
please mark me as brainliest
The ______ of Saturn vary in thickness and are composed of icy chunks ranging in size from sand to boulders (and even larger).
Answers
Answer:
"rings" - viewed from a distance, Saturn appears to be surrounded by rings
URGENT! 40 POINTS! For each situation below, make a model of the situation and find the work done on the box using both energy and forces.
1. A 2 kg box with some initial velocity slides up a frictionless ramp, which is at a 15ᵒ
angle to the ground, until the box comes to rest 1 second later.
2. A 2 kg box initially at rest slides down a frictionless ramp (at 15ᵒ from the ground) for
1 second.
3. A 2 kg box is thrown upward with an initial speed of 3.5 m/s. Consider the box from
the time it was thrown until it reaches its maximum height.
4. A 2 kg box is dropped from an initial height of 10 m.
I have some physics, I just don't know what formulas to use or where to start. Help is much appreciated.
Answers
Answer:
i dont know but ask your mom for help
Explanation:
some brainly things dont work so ask your mom for some help or someone you know ok
3.2.1.3.2 Practice with Work and Forces …A_K_
A piece of iron has a density of 7.86 g/cm3 and a mass of 1.09 x 10^-1 kg. Calculate the volume of the piece of iron.
Answers
1.00 cm3 lead x 11.4 g/cm3 = 11.4 g lead on one side of balance
To balance that, one needs 11.4 g of iron on the other pan. Calculate volume of iron to give you 11.4 g:
11.4 g iron x 1 cm3/7.87 g = 1.45 cm3 of iron needed
Brain list please
What would be the extension of the spring for a 3 N weight if the extension of the spring was 4 mm for a 50 g mass?
А 4 mm B)8 mm C)12mm D)24 mm
Answers
Answer:
24mm
Explanation:
3 N to g is 305.9 g
50g ---- 4 mm
305.9 ----- 4×305.9/50 = 24 mm
How many minutes did it take for all of the gold in the sample to change from solid to liquid? Time taken minutes =
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Calculate the amount of time it takes to heat the water by dividing the power used to heat the water, which was determined to be 1.867 with the heater element rating, listed in kW. So if your heater element rating was 3.6 kW, your equation would look like this: heating time = 1.867 ÷ 3.6, or heating time =0.52 hours.
A train is running at a speed of 60 m/s . what will this speed be in km/h ?
don't answer if u don't know
spammers = reported
Answers
Speed= 60 m/s
for converting m/s to km/h =multiply with 5/18
for converting km/h to m/s= multiply with 18/5
so, 60 × ( 18/50) = 216 km/h
Where is the natural light display called aurora borealis located?
Answers
The natural light display called aurora borealis is located in the northern
hemisphere.
There are two types of aurora which are called aurora borealis and aurora
australis. The aurora borealis is located in the Northern hemisphere while
the aurora australis is located in the Southern hemisphere.
They receive their energy through the interaction of charged particles
on the Sun and Earth to produce the light display. An example
of the interaction involves solar wind with atoms of the upper atmosphere.
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Answer:
northern and southern hemisphere
Explanation:
The amount of heat that is needed to raise the temperature of 1
kg of some material by 1°C is called the of the material.
a. specific heat
b. state
c. temperature
d. charge
Answers
Answer:
a. specific heat
Explanation:
a. specific heat
Explanation:
The specific amount of heat produced to an object of specific mass is known as specific heat.
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Help
Will give brainlessness
Answers
Answer:
1. A
2. A; distance is scalar, displacement is vector
3. C ; position is on the y-axis
The total mass of the carts is 1000 kg. The first
drop is 77.7 m. What is the speed of the coaster
at the bottom of the hill?
Answers
Answer:41xm/s
Explanation:
Answer:41xm/s
Explanation:
I found this for you hope it helps.
Complete the following sentence. Pressure in a liquid depends on the __________ of the liquid.
Answers
Answer:
density
Explanation:
because it is directly proportional
Pressure in a liquid depends on the density of the liquid.
What is density?Density is defined as the mass per unit volume. It is an important parameter to understand the fluid and its properties. Its unit is kg/m³.
The pressure in the liquid is;
P = ρgh
Where,
h is the height
ρ is the density
g is the acceleration due to gravity
The density of a liquid determines its pressure.
Hence, density is the correct answer.
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In which material does the light wave have the larger wavelength?
Answers
Answer: in the smaller/ thinner pieces.
2. If Joe rides his bicycle in a straight line for 15 min with an average velocity of 12.5 km/h south, how far has he ridden?
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Answer:
3.125 Kilometers
Explanation:
To answer this you just multiply 12.5 by .25 (since 15 minutes is a quarter of an hour) to get 3.125 kilometers ridden.
how do humans affect the lithosphere
Answers
Which wave has the highest frequency?
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Answer:
e
Explanation:
It is possible to create a wave having some frequency on a rope and then gradually it will become faster. During this time wavelength becomes shorter. Here the wave 'e' is found to has highest frequency. The correct option is E.
What is frequency of a wave?The number of oscillations of a wave per unit time is defined as the frequency. It is usually measured in Hertz and the frequency is directly proportional to the pitch. Humans can hear sounds with frequencies ranging between 20-20000 Hz.
The sounds with frequencies over the human ears range are called the ultrasonic sound and sounds with frequencies less than the audible range are called infrasonic sound. The wavelength and frequency are inversely proportional to each other.
When wavelength increases, frequency decreases and vice versa. So here wave E has maximum number of vibrations.
Thus the correct option is E.
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