Hello!
To find the volume with a known mass and known density:
⇒ must consider the relationship between all three of the variables:
[tex]\hookrightarrow \text{Mass = volume * density}[/tex]
Let's write down all that we know:
Mass: 39gDensity: 3g/mlLet's plug these into our equation:
[tex]\text{Mass = volume * density}\\39\text{g} = \text{volume } *3\text{g/ml}\\\\ \text{volume} = \dfrac{39\text{g}}{3\text{g/ml}} \\\\\text{volume}=13\text{ml}[/tex]
Answer: 13 ml
Hope that helps!
when sodium is heated, a yellow spectral line whose energy is 3.37 x 10-19 j is produced. what is the frequency of this light? what is the wavelength of this light?
The frequency of the sodium light is 50.86(s)⁻¹ and the wavelength of the sodium light is 5.898 x10⁻⁷m .
We are given that,
The energy of sodium light is = ΔE = 3.37 × 10⁻¹⁹J
Therefore, to get the frequency and the wavelength of the sodium light
by the equation which is given as,
ΔE = (hc)/λ
Where, h is the plank constant which is 6.626 x 10⁻³⁴ J, c is the velocity of light i.e.3×10⁸m/s , λ is the wavelength of the light which we have to calculate as,
λ = (hc)/ ΔE
λ = ( 6.626 x 10⁻³⁴ J-sec)(3×10⁸m/s)/(3.37 × 10⁻¹⁹J-sec)
λ = 5.898 x10⁻⁷m
The frequency f of sodium light can be calculated by,
f = c /λ
f = (3×10⁸m/s)/( 5.898 x10⁻⁷m)
f = (0.5086 × 10¹⁵)s⁻¹
f = 50.86(s)⁻¹
Therefore, the frequency of the sodium light would be 50.86(s)⁻¹ and the wavelength of the sodium light would be 5.898 x10⁻⁷m .
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you do not see eclipses every month because
Due to the Moon's orbit being five degrees off-center from Earth's orbit around the Sun, lunar eclipses don't happen every month and the Moon typically passes above or below the shadow.
Paul Doherty, a senior scientist at the Exploratorium, explains why this isn't the case: because the moon's orbit is skewed in relation to Earth's path around the sun, it frequently passes below or above Earth. A solar eclipse is not produced at those times because it does not cross the dividing line between the sun and the Earth.
Eclipses of the sun and the moon happen equally frequently. Because Earth's shadow on the Moon during a lunar eclipse is significantly greater than the shadow the Moon casts on Earth during a solar eclipse, lunar eclipses are more widely seen. As a result, a lunar eclipse is more likely to be seen than a solar eclipse.
A entire or partial occlusion of one celestial body by another along an observer's line of sight results in an eclipse. When the Moon moves in front of the Sun, either completely or partially obstructing its disc, a solar eclipse takes place.
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A power shovel did 24000j of work, exerting force of 4000n. how high did the shovel lift the load?
The height at which the power shovel lifted the load is 6 meters.
What is the height of the load?Work done is simply defined as the energy transfer that takes place when an object is either pushed or pulled over a certain distance by an external force. It is expressed as;
Work done = force × distance
Given the data in the question;
Force = 4000N = 4000kgm/s²Work done = 24000J = 24000kgm²/s²Height h = ?Plug the given values into the above formula and solve for the height.
Work done = force × distance
24000kgm²/s² = 4000kgm/s² × h
h = 24000kgm²/s² ÷ 4000kgm/s²
h = 6m
Therefore, the value of the height is 6 meters.
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a railroad car of mass m and speed v collides and sticks to an identical railroad car that is initially at rest. after the collision, the speed of the system
After the collision, the speed of the system will be half as much as before.
Before the collision, the momentum of one of the railroads is zero. After it, both railroads has the same velocity. Then, by the conservation of the total momentum of the system we have
mvi = mvf+mvf
mvi = 2mvf
vi = 2vf
vf = 1/2vi
That is the speed of the railroad together after the collision.
The kinetic energy before the collision is
Ki = 1/2 mvi^2
And after it
Kf = 1/2mvf^2 + 1/2mvf^2.............both railroads has kinetic energy
Kf = mvf^2....................................Replacing vf=1/2 vi
Kf = m (1/2 vi )^2
Kf = 1/2 * 1/2 mvi^2....................The red term is exactly the initial kinetic energy.
Kf = 1/2 Ki
Collision, additionally called impact, in physics, the unexpected, forceful coming together in direct touch of two bodies, inclusive of, as an example, two billiard balls, a golfing club and a ball, a hammer and a nail head, railroad motors while being coupled together, or a falling item and a ground.
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how much total work has been done on the block after it slides down along the ramp a distance of 1.93 m ? total work done on the block: j nancy measures the speed of the wooden block after it has gone the 1.93 m down the ramp. predict what speed she should measure. final speed after sliding from rest: m/s now, steven again places the wooden block back at the top of the ramp, but this time he jokingly gives the block a big push before it slides down the ramp. if the block's initial speed is 2.00 m/s and the block again slides down the ramp 1.93 m , what should nancy measure for the speed of the block this time? final speed after sliding with initial speed 2.00 m/s :
(a) 26.55 joule is the total work done on the block after it slides down along the ramp.
[tex][W=F x\cdotd],[=mg sin \theta x\cdot d],[=1.65 x\cdot9.8 x\cdot sin 58.3^0x\cdot1.93],[W=26.55J][/tex]
(b) According to equations of motion
[tex][v_f^2=v_i^2+2ad],[a=g sin \theta],[v_f^2=2g sin \theta d],[v_f=\sqrt(2g sin \theta d)],[v_f=5.67m/s][/tex]
(c) now the block has some initial velocity
[tex][v_f=\sqrt(v_i^2+2g sin \theta d][v_f=6.01m/s][/tex]
The displacement of a body mass and the force that creates the displacement are considered the dot product of a force's output. Despite the fact that there are several ways to define it, work is a scalar number.When a body is moving along a straight path, its "rate of change in displacement in respect to time" is measured as linear velocity.To know more about work done visit : https://brainly.com/question/16976412
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Mark is conducting an experiment to show how an object’s kinetic energy is affected by its mass and velocity. First, he lets an empty wagon roll down a hill and calculates its kinetic energy. Next, he repeats the experiment after placing a bag of sand in the wagon. Which is the best prediction for the second part of his experiment?(1 point)
1. The wagon will have less velocity than when it was empty.
2. The wagon will have the same amount of kinetic energy as when it was empty.
3. The wagon will have less kinetic energy than when it was empty.
4. The wagon will have more kinetic energy than when it was empty.
Answer:
the wagon will have more kinetic energy than when it was empty
Explanation:
the car drives 17.9 m / s East. It accelerates at 2.88 m / S2 at a 137.7 angle. How long did it take him to the car is driving directly north
It will take time of 8.52 seconds for the car to drive directly north.
What is the first equation of motion?The first equation of motion can be derived from the velocity time graph to establish the relationship between the initial velocity (u), final velocity (v), acceleration (a) of the object, and time (t) taken by the object.
The mathematical equation for the first equation of motion can be written as:
v = u + at
Given, the angle of acceleration, θ = 137.7°
The equation becomes : v = u + acosθ(t)
v = 17.9 + (2.88) cos(137.7) × t
v = 17.9 - 2.1 ×t
When the car reaches north, the final velocity of the car, v = 0
0 = 17.9 - (2.1) × t
2.1 ×t = 17.9
t = 8.52 sec
Therefore, the time of 8.52 seconds for the car to drive directly north.
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Answer:
8.40 seconds
Explanation:
You want the amount of time it takes for an initial velocity of 17.9 m/s East combined with an acceleration of 2.88 m/s² in a direction 137.7° CCW from East to result in a velocity that is due north.
TimeThe velocity as a function of time will be the sum of the initial velocity and the product of acceleration and time.
v = v₀ +a·t
v = (17.9, 0) + 2.88·(cos(137.7°), sin(137.7°))t
v = (17.9 +2.88·cos(137.7°)t, 2.88·sin(137.7°)t
In order for the x-component of this velocity to be zero, we must have ...
17.9 +2.88·cos(137.7°)t = 0
t = -17.9/(2.88·cos(137.7°)) ≈ 8.40 . . . . . seconds
The first attachment shows the geometry of the velocity. The short arrow is the acceleration vector. The change in velocity is the initial velocity (horizontal vector) plus a multiple of the acceleration vector. The red resultant vector is the desired northbound velocity. The car must accelerate for 8.40 seconds to achieve that velocity.
__
Additional comment
The second attachment shows the calculator screen with the necessary calculation.
A motorcycle traveling at 25 m/s accelerates at a rate of 6 m/s2 for 4 seconds. What is the final speed of the motorcycle in m/s?
Initial velocity = Vo= 25 m/s
Final velocity = V = x
Acceleration= a = 6 m/s^2
time= t = 4 seconds
Appy the equation:
V = Vo + at
Replacing:
V = 25 + 6(4) = 25 + 24 = 49 m/s
a 1000-kg car experiences a net force of 9500 n while slowing down from 30 m/s to 15.9 m/s. how far does it travel while slowing down?
30 m (rounded to one powerful player) (rounded to one significant figure). Negative displacement indicates a slowdown of the vehicle.
What is the easiest way to define a force?The definition of force in physics is: The pushing or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of the a body. It has a direction and a magnitude.
With an example, what is force?Force: Force is used to indicate a body's tendency to change or alter its state as a result of an external cause. When a force is applied, the body also can alter its size, shape, and motion. kicking the ball, pressing and pulling on the door, or churning bread are a few example.
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a ball dropped from 2 m height by an astronaut on the moon reaches ground in 1.57 s. what is the value of the acceleration of gravity on the moon?
The value of acceleration due to gravity on the moon is 1.62 m/s².
As the ball is dropped on the moon it means that the acceleration is constant.
If the acceleration is constant then we can use the equations of motion.
Using,
S = ut + 1/2at²
Where S is the displacement,
u is the initial velocity,
t is the time,
a is the acceleration due to gravity.
As the ball is dropped it means that initial velocity of the ball is zero the displacement of the ball is 2 m the time that ball takes to reach the surface of the moon is 1.57 seconds,
So, putting all the values in the equation,
We get,
2 = (0)(1.57) + 1/2a(1.57)²
a = 2×2/(1.57)²
a = 1.62m/s².
Hence the value of acceleration due to gravity on the moon is 1.62 m/s².
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9. What is the kinetic energy of a 2,000 kg boat moving at 7.9 m/s?
Answer:
62410 J
Explanation:
Kinetic Energy in Joules is given by the equation
[tex]KE = \dfrac{1}{2}mv^2\\\\[/tex]
where
m = mass of the object in kg
v = velocity in m/s
Given m = 2000 kg and v = 7.9 m.s
KE = (1/2) x 2000 x (7.9)²
= 62,410 J or 62.41 KJ
Can someone pls help me with this????
1. The Earth only has climate change because of human activity.
True
False
2. The Earth is currently experiencing _____.
An Ice Age
A Carbon Cycle Age
A Thermal Phase Change
An Interglacial Age
3. TRICKY QUESTION: What in one thing that scientists DO NOT use to study climate change? Choose only ONE Answer.
Number of Living trees
Pollen in bogs/lakes
Tree Rings
Ice core samples
4. Why were the humans able to develop agriculture at the beginning of the Holocene Period?
Woolly mammoth herds left behind large numbers of animal droppings for fertilizer.
The ice from the previous ice age melted and the climate was warmer.
Cave Men developed metal working technology that helped them make plows.
Holocene period men were able to select cold loving plants as crops.
5. TRICKY QUESTION: Humans impact the environment and the climate on the Earth. There are daily activities that you do that can affect coral reefs in oceans far away. What should you NOT DO where you live to help protect them?
Use less energy.
Plant trees/forest.
Use more water.
1. The Earth only has climate change because of human activity.
False
An object’s velocity v as a function of time t is given in the graph above. Which of the following statements is true about the motion of the object?
The object is not moving from t = 4 s to t = 10 s.
The object is not moving from , t , = 4 s to , t , = 10 s.
The object’s initial and final positions are the same.
The object’s initial and final positions are the same.
The object is slowing down from t = 14 s to t = 16 s.
The object is slowing down from , t , = 14 s to , t , = 16 s.
A - The object is not moving from t = 4 s to t = 10 s.
B - The object’s initial and final positions are the same.
C - The object is slowing down from t = 14 s to t = 16 s.
D - The average acceleration of the object from t = 0 s to t = 4 s is different from the acceleration from t = 34 s to t = 36 s.
and how is it solved
The statement that is true about the motion of the object is that the object’s initial and final positions are the same.
d = V * t
V = ( u + v ) / 2
d = Displacement
V = Average Velocity
t = Time
u = Initial velocity
v = Final velocity
For the first 4 seconds,
t = 4 s
V = ( 0 + 10 ) / 2
V = 5 m / s
d = 5 * 4
d = + 20 m
For the next 6 seconds,
t = 6 s
V = ( 10 + 10 ) / 2
V = 10 m / s
d = 10 * 6
d = + 60 m
For the next 4 seconds,
t = 4 s
V = ( 10 + 0 ) / 2
V = 5 m / s
d = 5 * 4
d = + 20 m
For the next 2 seconds,
t = 2 s
V = ( 0 - 5 ) / 2
V = - 2.5 m / s
d = - 2.5 * 2
d = - 5 m
For the next 18 seconds,
t = 18 s
V = ( - 5 - 5 ) / 2
V = - 5 m / s
d = - 5 * 18
d = - 90 m
For the next 2 seconds,
t = 2 s
V = ( - 5 + 0 ) / 2
V = - 2.5 m / s
d = - 2.5 * 2
d = - 5 m
Overall displacement = + 20 + 60 + 20 - 5 - 90 - 5
Overall displacement = + 100 - 100
Overall displacement = 0
If the overall displacement is zero, the initial position and the final position are the same.
Therefore, the statement that is true about the motion of the object is that the object’s initial and final positions are the same.
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A quarterback throws the football to a sta-
tionary receiver who is 28.4 m down the field.
The football is thrown at an initial angle of
38.6° to the ground.
The acceleration of gravity is 9.81 m/s².
a) At what initial speed must the quarter-
back throw the ball for it to reach the receiver?
Answer in units of m/s.
The following questions about football movement can be answered using the projectile launch equations:
Initial speed is: v = 16.89 m / s
Maximum height is: y = 14.26m
Given parameters
Horizontal distance x = 28.4 m
Launch angle tea = 38.6º
To find,
The initial speed and maximum height
Kinematics is used in projectile launch, where the acceleration caused by gravity is measured on the y-axis and absent on the x-axis.
The range, as shown in the attachment, is the distance covered at the same departure height.
R = [tex]v^{2}[/tex]sin2θ/g
[tex]v^{2}[/tex]= g*r/sin2θ
calculating,
v² = 9.8 *28.4 / sin (2 *38.6)
=[tex]\sqrt{278.32/0.9751}[/tex]
v = 16.89 m / s
The vertical speed is zero at the height maximum.
v² = v² - 2 g y
0 = v² - 2g y
y = v²/2g
y = 14.26m
In conclusion, the answers to the queries about the movement of the football may be found using the projectile launch equations:
Initial speed is: v = 16.89 m / s
Maximum height is: y = 14.26m
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help me please this assignment is due at 11:59 p.m.
Which of the following correctly organizes alpha particles, beta particles, and gamma radiation from the smallest relative mass to the largest relative mass?
Arrangement from the smallest relative mass to the largest relative mass
gamma radiation → beta particles → alpha particles
A radioactive atom will naturally emit radiation in the form of energy or particles in order to transition into a more stable state. The difference between radioactive material and the radiation it emits must be made. The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive. Alpha, beta, and gamma decay are three of the most prevalent forms of decay, and they all entail the emission of one or more particles.
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which of the following best describes the composition of an atom
Answer: its the third one
a nucleus of positive and neutral particles surrounded by negative particles.
in which the neutral particles are neutrons, the positive ones are protons and the negative ones are electrons.
hope it helps, I'd appreciate a brainliest :D
What do the three arrows represent in the figure of Earth and the moon? Enter the correct label for each arrow in the diagram.
PLEASE HELP DUE MIDNIGHT
The moon is gravitational at a different point on earth.
Three arrows indicate the direction of the sun on March 18th. full moon 01.04. new moon and 16.04. full moon. To draw the orbit, we need to know the direction to the moon and the distance D to the moon for each observation. Arrows are widely accepted for indicating direction. They are commonly used for signs and directions and are commonly used for road markings.
Up arrows are often used to indicate increasing numbers and down arrows to indicate decreasing numbers. The three-arrow symbol is widely used in the US Antifa movement along with flags based on German Antifa symbols. Anarchists and anti-fascists use this symbol frequently usually to oppose authoritarianism fascism and authoritarian socialism. Circles with arrow symbols were originally used as proofreading bookmarks. Nevertheless, it has become a universal symbol that conveys both masculine and feminine aspects.
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Topic Test
1
D
Which of the following does NOT limit range of motion?
A. weak muscles
B.
age
C. disease
D. bone structure
Active
OA
OB
5
8
9
10
Please select the best answer from the choices provided.
▶
option D active bone structure is the most apt answer for not limiting range of motion.
what is range of motion?
Range of motion refers to the amount of the distance an individual can travel or distance in an individual can make an object travel.
Example the distance travelled by a person while running.
Given:
possible reasons for limited range of motion-
1- weak muscles
2- age
3- disease
4- active bone structure
Weak muscles play an important role in the range of motion for example a person who is will Trend and has developed muscles can throw any object to a greater distance than a novice whose muscles are not much developed.
Age is also important factor as when age increases the muscles become weak and their food the range of motion decreases.
Disease can also decrease the range of motion for example a person suffering from asthma cannot run a greater distance.
While active bone structure also impacts the range of motion, but it is the most trainable of all the given options therefore active bone structure does not impact much to the range of the motion.
therefore, option D active bone structure is the most apt answer for not imitated range of motion.
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the possible ways used to remove a truck that is stuck in mud
Straight wheels while slowly depressing the gas pedal. Then, whether in drive or reverse, rock the automobile back and forth. If the wheels begin to spin, stop and turn around. If your transmission has a winter mode, use it.
What is meant by angular acceleration?The rate of change in angular velocity over time is represented by angular acceleration.
How swiftly something is accelerating or decelerating is another method to consider this. acceleration () is equal to t/. Rads/s² or degrees/s² are the units.
To maintain straight wheels while slowly depressing the gas pedal. Then, whether in drive or reverse, rock the automobile back and forth. If the wheels begin to spin, stop and turn around. If your transmission has a winter mode, use it.
Use the weight of the car to gain some traction while applying gentle pressure to the accelerator and moving as slowly as you can.
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A first piece of rock which weighs 5N. Force F is applied to this first piece of rock and it produces an acceleration of a. Now if there is a second piece of rock. What force needs to be applied to the second piece of rock to produce an acceleration of 8a. Mass of both pieces of rock is same.
Answer:
Explanation:
he force will depend on the masses of the rocks.
The formula you weren’t paying attention to in your Physics lesson was one of the more basic ones:
F = ma
F is the force. m is the mass of the object, and a is the acceleration. That’s all you should need.
Unfortunately, your question gave the weight of the rocks, not their masses. So, it can’t be answered without more information - eg is the rock on Earth, or on the moon, Mars or a planet orbiting Alpha Centauri?
If the rock is located on Earth, then you can use the same formula as above, because we know that a = g = 9.8m/s/s. and F is the weight. So, we know F, a and can work out m using a bit of basic algebra.
The other problem is that we don’t know the mass of the second piece of rock, because we haven’t been told either the weight or mass of that piece of rock.
If your homework question didn’t specify that, you can either refuse to answer it saying that not enough information was given, or STATE in your answer that you are assuming that the second piece of rock is the same mass as the first one.
If you decide to do that, then a minute’s work should give you the answer you’re looking for.
Which row describes the charge on the strips after rubbing, and the force between the strips after rubbing?
Option 4. The same charge - repulsion describes the charge on the strips after rubbing.
Static charge or an electrostatic charge is a deficiency or extra of electrons that occurs on ungrounded or insulating surfaces. it's miles produced by way of triboelectric costs, expenses which can be generated by friction among surfaces, including the motion of paper thru a copier or printer.
An electrical charge is created when two materials come into contact or are rubbed collectively. when the substances are in touch, electrons can be actually rubbed off of one object and onto the alternative.
Static power is an imbalance of electric fees within or on the floor of a material. The fee stays till it could pass away by way of an electric present-day or electric-powered discharge.
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Why does the brightness of a bulb not change noticeably when you use longer copper wires to connect it to the battery?.
Very little energy is dissipated in the thick connecting wires.
Resistance is inversely proportional to wire length, so less energy is dissipated through the wire and more energy is dissipated through the bulb. The resistance of the wires is low enough that there is not enough voltage drop across the wires so there is no noticeable voltage difference across the bulb.
The more bulbs you connect in series the brighter or brighter the bulb. The light is dimmer because less current flows through each bulb. This is because adding more bulbs in a series means adding more resistance. In a parallel circuit, current flows through separate branches. If another branch is added with another bulb, the current will have to follow an additional path. However the battery produces a constant voltage, so the current through the original lamp and its brightness remain unchanged.
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The melting point of a benzophenone is depressed by 2. 3°c when 0. 358 g of solute is dissolved in 7. 544 g of benzophenone. What is the molar mass of the solute?.
The equation If the mass of a solute is known, the formula molar mass of solute = mass of solute/number of moles of solute can be used to calculate its molar mass.
To find a solution?
One mole of a substance is made up of Avogadro's number (6.022 x 1023) of molecules (or formula units) (ionic compound).
The molar mass of a chemical indicates its mass in one mole.
To put it another way, it gives you the quantity of grammes per mole of a substance.
Estimating the mass of the solute
Concentration in g/dm = mass of solute in g
0.358/3= 0.119
Volume in dm = 3.
A sodium chloride solution has a 10 g/dm concentration.
Concentration in g/dm = mass of solute in g
Volume in dm = 3.
3\s = 10 g/dm
0.358× 2 dm 3
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Is this statement true or false? brazil is home to 20% of the known living species on earth.
20% of all known living species on earth are found in Brazil. Given statement is True.
Write about Brazil?
Brazilian land is home to 20% of all known species on Earth, making it the country with the most biodiversity in the entire globe. The Amazon rainforest, often known as the "livings of the Earth," occupies the majority of Brazil's northern half of the country's landmass and is responsible for much of the country's astounding biodiversity.
The most diversified of the 18 megadiverse nations is Brazil. It is home to between 15 and 20% of the biological diversity on the planet, including more than 120,000 species of invertebrates, 9,000 kinds of vertebrates, and more than 4,000 species of plants.
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a 8.8 kg object undergoes an acceleration of 3.5 m/s2. (a) what is the magnitude of the resultant force acting on it? incorrect: your answer is incorrect.
Answer: The magnitude of the resultant force acting on the object of 8.8kg is 17.6N
Explanation:
We have that the magnitude of the net external force and the acceleration is give as
F= 17.6N
a=3.5m/s^2
From the question we are told
A 8.8kg object undergoes an acceleration of 3.5 m/s2 .
a. What is the magnitude of the net external force acting on it?
Generally the equation for the magnitude of the net external force is mathematically given as
F=ma
F=8.8*2
Therefore, the magnitude of the resultant force acting on the object is =17.6N.
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9. Katsumi mentions using satellite data to complement his models. How do you think this information could improve his models?
Answer:
He could use this data more accurately sculpt models.
Explanation:
If you had a rough image of something like a search of the earth that you found online, you would not know to see some of the features the planet has, but if you have access to satellite imagery, you will see many small details within the surface of the earth.
What is the IMA of the inclined plane.
Answer:
Explanation:
12
the heat capacity at constant volume is 30 j/k. the energy change upon heating the system from 200 k to 350 k, at constant volume, is (in kj):
If the heat capacity at constant volume is 30 J / k. the energy change upon heating the system from 200 k to 350 k would be 450 Joules.
What is thermal energy?It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.
As given in the problem we have to calculate the energy change upon heating the system from 200 k to 350 k, if the heat capacity at constant volume is 30 j/k.
The energy change upon the heating = 30 × (350 -200)
= 450 Joules
Thus, the energy change upon heating the system from 200 k to 350 k would be 450 Joules.
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3 meters per second for 3 soconds
Answer:
9 meters
Explanation:
Assuming this question is asking for the change in position, the way to approach such a problem is multiplying VELOCITY by TIME when velocity is constant.
Velocity = 3 m/s, Time = 3s.
3m/s * 3s = 9m
