Answer:
Increase in Atomic Spacing = 6.5 x 10⁻¹² m = 6.5 pm
Explanation:
The young's modulus of a material is given by the following formula:
Young's Modulus = Stress/Strain
2 x 10¹¹ N/m² = (5 x 10⁹ N/m²)/Strain
Strain = (5 x 10⁹ N/m²)/(2 x 10¹¹ N/m²)
Strain = 0.025
Now, the formula for the strain in the steel wire can be written in terms of atomic spacing as follows:
Strain = Increase in Atomic Spacing/Initial Atomic Spacing
0.025 = Increase in Atomic Spacing/2.6 °A
Increase in Atomic Spacing = (0.025)(2.6 x 10⁻¹⁰ m)
Increase in Atomic Spacing = 6.5 x 10⁻¹² m = 6.5 pm
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:
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.
What is the velocity of a 0.06
kg ball moving with 75 J of energy?
Answer:
The ball moves at 50 m/s
Explanation:
Kinetic Energy
Is the energy that it possesses an object of mass m due to its motion at speed v. The kinetic energy is calculated as follows:
[tex]\displaystyle K=\frac{1}{2}m\cdot v^2[/tex]
If we know the value of the kinetic energy and need to calculate the speed, we can solve it for v:
[tex]\displaystyle v=\sqrt{\frac{2K}{m}}[/tex]
Since the ball has a mass of m=0.06 kg and moves with a kinetic energy of K=75 Joule:
[tex]\displaystyle v=\sqrt{\frac{2\cdot 75}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{\frac{150}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{2500}[/tex]
v=50 m/s
The ball moves at 50 m/s
Answer:50m/s
Explanation:divide
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
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what allows for movement
Choose the correct answer:
-excretory
-immune/hymophatic
-integumentary
-muscular
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.
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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
Npk fertilizer is called a complete fertilizer,why?
Answer:
Complete fertilizers or balanced fertilizers are so-called because of their amounts of nitrogen, phosphorus, and potassium. ... If your soil already had an excess of one of the three nutrients in NPK, you could actually be harming some of your plants by adding more of it to the soil
Explanation:
How is power calculates
Answer:
Explanation:
Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.
6. Which Thanksgiving dish contains the most dietary fiber ? (Corn) (Mashed Potatoes) (Sweet Potatoes) (Pecan Pie)
Answer:
The correct option is;
Sweet Potatoes
Explanation:
The dietary fiber in Corn = 2.7 g per 100 g
The dietary fiber in Mashed Potatoes = 1.3 g per 100 g
The dietary fiber in Sweet Potatoes = 3 g per 100 g
The dietary fiber in Pecan Pie = 2.1 g per 100 g
Therefore, the Thanksgiving dish that contains the most dietary fiber per 100 g is Sweet Potatoes
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
Why are many adults and youth in the United states overweight?
Answer:
I'd imagine fast food is a lot more popular than most countries over there and easier to get hold of.
Explanation:
america
Answer:
There are different answers to that, like if you read a passage or something.
Explanation:
These days many people do not get exercise. A lot of jobs are now done indoors and do not require any physical activities. Technology is becoming more advanced and many people prefer using machines to do the heaving lifting.
There are a lot of fast-food restaurants and this is where a lot of people in the US choose to eat. The food is cheap and easy to pick up. This food is convenient for people on the go. The food is not healthy and it causes weight gain.
In the US, many young children find it cool to smoke. Smoking decreases the body's strength and it causes a decrease in physical health, causing people to gain weight.
Everyone has a phone these days, if not some kind of electronic device to chat with people or play games. Over time, playing on electronic devices replaces doing physical activities.
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.
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)
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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.
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
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:
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.
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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
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
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:
Which refers to the rate of change in velocity?
speed
O acceleration
O direction
O magnitude
. 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.
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.
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:
If a car with an initial velocity of 10 m/s accelerates at a rate of 50 m/s^2
for 3 s. What will be the final velocity? *
Given:
Initial velocity (u) = 10 m/s
Acceleration (a) = 50 m/s²
Time taken (t) = 3 s
To Find:
Final velocity (v)
Answer:
By using equation of motion, we get:
[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow v = 10 + 50 \times 3 \\ \\ \rm \longrightarrow v = 10 + 150 \\ \\ \rm \longrightarrow v = 160 \: m {s}^{ - 1} [/tex]
[tex] \therefore [/tex] Final velocity (v) = 160 m/s
what is a Harmful mutation
Is better to run or walk when it is raining?
Answer:
run
Explanation:
run - less wet
walking - more wet
Caregivers should begin reading to children:
When they are babies.
When they can talk.
When they show an interest.
When they are two.
When they are preschoolers.
Answer:
When they are babies. to get them familar with it
Explanation:
Pls choose brainliest.
Answer:
When they are babies
Explanation:
Because they could hear the words and laern them.