Answer:
1. Somewhat 2.Yes
Explanation:
Answer:
C,a
Explanation:
1. A particular lever is 90.0% efficient. If 50.0 J of work are done on the lever, then how much work does the lever do on its load? 2.The mechanical advantage of a pulley system is 4.00. Using this pulley system, how much force do you need to exert to lift a 500.0 N box?
Answer:
Explanation:
Using the efficiency formula;
Efficiency = Work done by the machine (output)/work done on the machine (input) ×100%
Efficiency =w/50 ×100
90 = 100w/50
Cross multiply
90×50 = 100W
4500 = 100W
W = 4500/100
W = 45Joules
Hence the lever does 45Joules of work on its load
2) Mechanical Advantage= Load/Effort
Given
MA = 4
Load = 500N
4 = 500/Effort
Effort = 500/4
Effort =125N
Hence the effort required to lift the load is 125N
1. The work done by the lever on its load is 45 J
2. The force needed to exert to lift the load is 125 N.
1. Determination of the work done by the lever on the load.
Work Input = 50 J
Efficiency = 90%
Work Output =?[tex]efficiency \: = \frac{work \: output}{work \: input} \times 100 \\ \\ 90\% = \frac{work \: output}{50} \\ \\ cross \: multiply \\ \\ work \: output \: = 90\% \: \times 50 \\ \\ work \: output = 0.9 \: \times 50[/tex]
Work Output = 45 JTherefore, the work done by the lever on the load is 45 J
2. Determination of the force needed to lift the load
Mechanical advantage (MA) = 4
Load (L) = 500 N
Effort (E) = ?[tex]mechanical \: advantage \: = \frac{load}{effot} \\ \\ 4 \: = \frac{500}{effort} \\ \\ cross \: multiply \\ \\ 4 \: \times effort \: = 500 \\ \\ divide \: both \: side \: by \: 4 \\ \\ effort \: = \frac{500}{4} \\ [/tex]
Effort = 125 NTherefore, the force needed to lift the load is 125 N
Learn more: https://brainly.com/question/17070019
3. As the ice melts into liquid water, what happens to the kinetic energy of the particles in the sample?
4. How does the kinetic energy of the particles in the sample relate to the sample’s temperature?
Answer:
As ice melts into water, kinetic energy is being added to the particles. This causes them to be 'excited' and they break the bonds that hold them together as a solid, resulting in a change of state: solid -> liquid.
Explanation:
As the ice melts into liquid water, the kinetic energy of the particles in the sample increase. The temperature of the sample is directly proportional to the kinetic energy of the particle.
What is Kinetic energy?The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate a body of a given mass from the rest position to its stated velocity. The body of an object maintains the same amount of kinetic energy which it gained during its acceleration unless its speed changes.
The temperature is directly proportional to the kinetic energy of the object. As the temperature of the object increases the phase of the object changes from solid to liquid.
Learn more about Kinetic energy here:
https://brainly.com/question/26472013
#SPJ6
If a girl runs 51 m East in 17 seconds what is her velocity?
Answer:
Yea what he said I think
Explanation:
A crate weighing 523 N rests on a plank that makes a 22.0 angle with the ground. Find the components of the crate's weight force parallel and perpendicular to the plank. ( Fgx = –196 N, Fgy = –485 N)
Answer:
Explanation:
The weight of the crate will e equal to its normal reaction R
Since R = mgsin theta = W
W = mgsintheta ( resolved along the vertical perpendicular to the plank
Fy = 523sin22°
Fy = 195.92N
Since the weight is acting along the negative y direction,
Fy = -195.92N
The force parallel to the plank will be the force acting in the horizontal direction.
Fx = Fcos theta
Fx = 523cos 22°
Fx = 484.9N
Children are ready for more complex storybooks:
Around one.
Around two.
Around two and a half to three years old.
Around three.
Around four years old.
Answer:
4
Explanation:
Because that is when they're mind learns how to read
what is a Harmful mutation
. A car going 50 m/s accelerates to pass a truck. Five seconds later the car is going 80m/s. Calculate the acceleration of the car.
GIVING BRAINLY, FOLLOW AND STARS, HELP!
When a solid object absorbs infrared rays, what happens to the particles
in that object?
Answer:
All objects emit and absorb infrared radiation. The hotter an object is the more energy it radiates per second. Infrared radiation can travel through a vacuum. When infrared radiation hits an object some of the energy is absorbed, making the objects temperature increase, and some is reflected.
Explanation:
What is the speed of a car that travels 400 m in 20
minutes?
Answer:
3.33 m/s
Explanation:
time = 20 minutes = 20 x 60 = 120 seconds
distance = 400m
speed = distance/time
= 400/120
= 40/12
= 10/3
= 3.33m/s
You leave Chicago, Illinois at 8am and fly to Portland, Oregon. Your flight takes 2.5 hours. What time do you arrive in Portland?
Answer:
10:30am ........................
Answer:
maybe around 10:30 I would say
PLZZZ HELLPP MEE
Which of the choices below shows a model of the atom Neon (Ne)?
B.
D.
Ne
Ne Ne
OB
ОС
OD
Answer:
A is answer
Explanation:
this is helpful
While a dog runs forward, its
owner pulls back with a 22.4 N
force at a 115º direction, doing
-42.3 J of work. How far did the
dog move?
(Unit = m)
HELP ME
Answer:
d = 4.47 [m]
Explanation:
To solve this problem we must make a free body diagram, where we can see the direction of the force acting with the appropriate angles. In the attached image we can see the free body diagram mentioned.
So in the image, we can see an angle of 65° with respect to the horizontal, therefore we can calculate the horizontal component of the force.
Fx = 22.4*cos (65)
Fx = - 9.46 [N] (it's negative because the force is pointing in the negative direction).
We can obtain the same result using 115° as the angle.
Fx = 22.4*cos (115)
Fx = 9.46 [N]
Now we know that work is defined as the product of the force by the distance, therefore we have.
Note: Always the work must be calculated with the force parallel
to the movement
W = F*d
Where:
W = work = 42.3 [J] (units of joules)
F = force parallel to the movement = 9.46 [N]
d = distance [m]
d = W/F
d = 42.3/9.46
d = 4.47 [m]
Answer:
Explanation:
the person on top of me is right it’s 4.47
1 kg sample of aluminium is stored in a laboratory. In a different laboratory, in the same town,
there is a 1 kg sample of iron.
Which quantity must these two samples always have in common?
Same density
Same temperature
Same volume
Same weight
Plz explain
Answer:
same weight
Explanation:
because same
This is a lab for science can you help with punctuation errors? Also where it says figures I have pictures :) (I am in 7th grade btw so no hate)
Leaf lab
Purpose: Find out if the leaf area of a given tree is bigger on the North or the Southside. Learn more advanced statistical analysis.
Research: To find the area of an irregular shape it’s whole + part ½ which is whole plus part divided by 2. The shape of the leaf will be traced. They are affected by the Earth's tilt and the sun because we are in the North Hemisphere.
Figure 1 is an example of the Earth’s tilt and how the sun gives a certain amount of heat to different parts of the Earth.
The south gets more sun it’s because the leaves burn while the north leaves get less sun. The north leaves are thinner but bigger in area than the leaves that get a lot of suns. This makes them smaller or bigger because one side might get more sun which makes north leaves bigger.
Hypothesis: The leaves on the Northside are bigger.
Procedure:
1. Collect 35 leaves from the Northside and 25 leaves from the Southside.
2. A tree that is not in shade.
3. Press the leaves flat.
4. Trace the leaves onto graph paper using both sides of the page keeping North and South separate.
5.Count whole (w) and partial squares (p) and calculate the area of each leaf in squares 6. with the equation A= W+ ½ P.
Figure 2 is an example of the equation A= W+ ½ P. There are 4 whole´s and 8 parts so the area is 8 inches squared because 4+ ½ 8= 8.
7. Create a north and South leaf data table.
8. Discard leaves afterward.
9. Put the leaf area in order from smallest to greatest in each table.
10. Find the mean, median, mode of the 2 data sets as well as the entire range of 50 leaf data sets.
11.Create a histogram
Use the range to find the size of 7 bins. USe the nearest whole number
Sort leaves
Count leaves and creates a chart
12.Create histograms of individual data using Microsoft Excel or google docs
5. Results: The north's side leaves are bigger than the south side by a few a lot,
6. Conclusion: It was a warm sunny day and windy. The experimenter gathered 25 leaves from the North and South sides with all different sizes and colors. The hypothesis was supported based on the data collected. One reason why it was supported was that the North overall average was greater than the South. The Northside leaves are greater is that it is proven by facts. If someone compared a random south leave to a random north leaf, most times the North would be bigger because the probability of getting a big leaf is higher for North rather than South. The second piece of evidence from my data is that the South bin had more leaves in smaller bins while the North bin had an equal amount of leaves in the high and low bins. The third piece of evidence is that the Northside leaves had a bigger average than the South leaves. Also, the Southside had the smallest leaf while the Northside had the biggest leaf. The entire group also supported this.
7. Errors and ways to improve: Try to get different trees and instead of picking a few leaves in a certain area in the north and south, pick random ones. Also, gather more and different leaves. Different weather conditions could affect the leaves.
Figure 3, is the north bin where most of the leaves are bigger.
Figure 4, the south bin where most of the leaves are smaller.
Figure 5, the class north bin where some most leaves are small but some are big.
Figure 6, the class south bin where mostly all of the leaves are small.
Figure 7 is the tree used to pick leaves off.
Answer:
First of all you should give more then 5 points for this.And the errors are you should add a space between all of the steps and info of the lab. And read everything over again and where you take a breath at or if you stop add a coma or a period.
GIVING BRAINLIEST TO THE RIGHT ANSWER examine the information for the two samples described in the chart. How are zinc and sodium alike?
A. They have the same hardness at room temperature.
B. They are both dolids at room temperature.
C. They have the same color.
D. They have the same boiling point.
A driver speeds along a curved road and sees a fallen tree on the road. He applies the brakes but is unable to stop in time. When the car hits the tree, it slows down from 6 meters/second to 0 meters/second. What was the change in velocity during this time?
Answer:
It's -6 meters/seconds.
Explanation:
Answer:
-6
Explanation:
A tablecloth can be pulled out from underneath a fully set table without breaking plates or glassware. The reason is that the objects follow Newton's:
Answer:
newtons law of force
newtons law of force explains that something may or can or canot move depending on the objexts mass.
Come up with your own team sports game and make your own rules and regulation.
SO my sports name would be called " Basvollball" It's where you have to hit in a volleyball into a basketball hoop, of course, the time is the same as football with increments of 5 minutes for junior high and 7 minutes for high school with halftime. Also, the ball can never touch the ground and if the ball ever hits the floor its the other's team ball. To decide which team gets the ball, a coin flip will decide it. For the point system, it depends on how far the ball is hit from so it's like basketball from 3 pointers to 2 points inside the line. If the team ever reaches 30 points without the other team scoring, the team who's winning will automatically win after the time runs out in that period or quarter. You can use every body part, as long as, the ball doesn't touch the floor, and you can only use your body to push someone, no pushing with hands or arms. You can play this sport indoors or outside whether the team has a field available. There's also a maximum of 14 players on the field, so 7 players on each team.
In boiling water, water molecules move apart and escape in the form of water vapor. The process is called_
Answer:
Evaporation
Explanation:
Evaporation occurs when a liquid changes to a gas. During evaporation, molecules gain enough thermal energy to escape from the liquid surface into the air as water vapor. Water-vapor molecules spread out, breaking completely free of each other, and then disperse or spread out among the other gas molecules in the air.
Hope this helps stay safe
love anyla..
Answer:
evarporation that is the answer i think because molecules of liqid are sperated thats why when in boiling water The molecules move apart and escape in vapour even i don't think it is the right answer
Car 1 of mass m1 is waiting at a traffic light.
Car 1 is struck from behind by Car 2 of mass m2.
The two cars stick together after the collision.
Car 2 was traveling at v2i = 30.0 m/s before the collision.
What is the initial kinetic energy, in [J], of car 1, if m1= 2500kg?
Answer: KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
Explanation: since initial velocity is 0, the KE is 0.
The initial kinetic energy, in [J], of car 1 is 0.
KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by means of reason of its movement. If paintings, which transfer strength, are carried out on an object via making use of an internet pressure, the object hastens and thereby gains kinetic energy.
What's the initial and very last kinetic strength?The kinetic strength of an object depends on its velocity. To trade its pace, one must exert pressure on it. It turns out there's a connection between the pressure one applies to an object and the resulting change in its kinetic electricity: KE(very last) - KE(initial) = (force) (distance)
Learn more about kinetic energy here: https://brainly.com/question/25959744
#SPJ2
How much does a 200 kg car weigh?
Answer:
42,000 lbs
Explanation:
100 kg is 210 lbs.
200 x 210 lbs =
42,000 lbs
The weight of the car is product of its mass and acceleration due to gravity of earth. Hence, the weight of the 200 kg car is 1960 N.
What is acceleration due to gravity ?The gravitational force of an object is the force by which attracts other objects into its center of mass. Earth attracts every objects into its center and that is why we are all standing on the ground.
The weight we experience on earth is due to this gravitational force and it decreases when we move far from earth. The acceleration due to gravity is the acceleration by which an object accelerates downwards due to earth's gravity (g).
Weight of an object = mass × g
g for earth = 9.8 m/s²
mass of the car = 200 Kg.
then, weight = 200 kg × 9.8 m/s² = 1960 N.
Therefore, the weight of the car is 1960 N.
Find more on gravitational force:
https://brainly.com/question/24783651
#SPJ6
What does the xylem do?
A .stores the glucose
B captures the sunlight
C absorbs oxygen into the leaf
D carries water from the roots to the leaves
Answer:
D carries water from the roots to the leaves.
is the answer.
Explanation:
Xylem is the specialised tissue of vascular plants that transports water and nutrients from the plant–soil interface to stems and leaves, and provides mechanical support and storage.
Answer:
D carries water from the roots to the leaves
Explanation:
have a nice day
If the magnification of the image is NEGATIVE, the image is ( choose two .25
* answers)
virtual
real
inverted
reduced
Answer:
C. Inverted
Explanation:
When a negative magnification is obtained, it means that the image is inverted. When an object is placed far away from a converging lens than the focal length, the image is formed on the opposite side of the lens. In this case, a screen is introduced at image position for viewing. The image is focused up-side down. It is real and inverted.
give any five difference between of solar system and constellation
Answer:
constellation is just a name for a set of stars that are perceived, from an earth viewpoint, to make a form in tge night sky…. the Plough, the Great Bear, for example. A galaxy is a formation of stars that are revolving around a centre, our own solar system lies in the outer edge of the galaxy known as the Milky Way.
Explanation:
Is better to run or walk when it is raining?
Answer:
run
Explanation:
run - less wet
walking - more wet
Explain how to identify a starting position on a line.
Answer: You can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.
brainliest please :)
Answer:
We can easily find out the beginning point of the line by using dot representation. When it comes to the position vector, it expresses the exact position of a certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end that is fixed to its body.
PLEAASSEEEE HELLLPPP !
Answer: It moves in the direction of Fb at a constant rate of speed, because the same amount of force is being added the whole time.
Explanation:
what allows for movement
Choose the correct answer:
-excretory
-immune/hymophatic
-integumentary
-muscular
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions. Free Weights and Machines What are some things to consider when deciding to use free weights or machine weights?
Machine weights are safer when used correctly, but free weights can be dropped and cause injury. These are safety considerations to keep in mind whether using free weights or machine weights. But because they aren't big, complicated machinery, free weights are less expensive.
What are free weights or machine weights?Resistance machines and free weights are very different from one another in terms of how they work and the results they can create.
Machines are set in place and can only move in a few directions, whereas free weights can be moved in whatever direction the user selects. This is the main distinction between machines and free weights. Free weights require you to utilize more stabilizing muscles to control them, whereas resistance machines help you by stabilizing you while you move.
Learn more about free weights here:
https://brainly.com/question/21991373
#SPJ2
A train travels for 120 seconds (s) at a speed of 50 meter per second (m/s). What was the distance (m) that it travelled?
Answer:
2
Explanation:
50 times 2