Under the same conditions, the height of a person whose film image is 16 mm is 1.44 m.
What is magnification of a lens?
The magnification of a lens is defined as the ratio of the height of an image to the height of an object.
The formula for magnification of a lens is given as;
M = v/u = hi/h
where;
v is image distanceu is object distance hi is image heighth is object heightUnder the same conditions, the height of a person whose film image is 16 mm is calculated as follows
M = 20 mm / 1.8 m = 16 mm/h
20 mm / 1.8 m = 16 mm/h
h = (16 mm / 20 mm) x 1.8 m
h = 1.44 m
Thus, under the same conditions, the height of a person whose film image is 16 mm is 1.44 m.
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An apple is hanging at rest on a tree when its stem breaks. It takes 1.4 seconds for the apple to fall halfway to the ground. How long does it take for the apple to fall the entire distance to the ground?
The apple takes 2.05 seconds to fall due to gravity.
Newton's Second Law of Motion and Newton's Law of Universal Gravitation serve as the foundation for the formula for the acceleration caused by gravity. The most practical formula for estimating the acceleration caused by gravity is given by these two laws: g = G*M/R2, where g is the acceleration caused by gravity, G is the universal gravitational constant, M is mass, and R is distance.
Everything has a gravitational pull on every other object, according to Newton's Law of Universal Gravitation. The force is inversely proportional to the square of the distance between the centers of both objects and directly proportional to the masses of both objects. This is determined mathematically by the formula F = G*(m1*m2/d2), where F is the force and G is the gravitational constant of the universe.
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a) d = 24 g/mL
v = 1.2 L =
m=? 28.1
? 23.03
mL
Density calculations are 1.2L = 1200mL m = 2.9 x 10^4 g
Density is the mass of a material substance per unit volume. d = M/V, where d is density, M is mass, and V is volume, is the formula for density. Grams per cubic centimetre are a typical unit of measurement for density. Another way to state density is in kilogrammes per cubic metre (in metre-kilogram-second or SI units).
For instance, air weighs 1.2 pounds per cubic metre. In textbooks and manuals, the densities of typical solids, liquids, and gases are stated. The relationship between mass and volume can be easily determined using density; for example, the mass of a body is equal to its volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d).
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You pull a rope to the left with 300 N and a friend pulls the rope to the right with 425 N. Draw a vector for the two forces acting on the rope
The total forces acting on the rope is 125 N towards the right side.
125 N of total forces are being applied to the rope's right side.
How are two forces operating on the rope represented by a vector?300 N of force as well as additional forces are applied in the proper direction.These forces are 425 N and are bigger than the starting force. The necessary vector diagram is shown here.The two forces' large, calm vector diagram is seen here. We must now determine the product of these two forces for part B.These two forces combine to produce a vector that is equal to the bigger force in the right direction less the smaller force in the left.Due to the smaller forces moving left. Therefore, since positive (425 -300) N is equivalent to 125 N, we have determined that the direction is correct.These two forces add up to 125 newtons moving in the proper direction.We must determine the size of the resultant, which is the magnitude of 125 newtons, for part C.The rightward movement of the outcome entities. The response to part C is this.To construct the resultant vector for party in this manner, we must widen it. The rope is this.Small and pointing in the right direction by 125 N, the outcome vector is small.To know more about vector visit:
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You are traveling on an airplane. The velocity of the plane with respect to the air is 120 m/s due east. The velocity of the air with respect to the ground is 43 m/s at an angle of 30° west of due north.
1) What is the speed of the plane with respect to the ground?
2) What is the heading of the plane with respect to the ground? (Let 0° represent due north, 90° represents due east).
3) How far east will the plane travel in 1 hour?
Answer:
VPA
Explanation:
Why are the noble gases the least reactive elements?
A car with an initial speed of 22.1 km/h accelerates at a uniform rate of 0.84 m/s2 for 4.4 s. Find the final speed of the car. Answer in units of m/s. Find the displacement of the car after that time. Answer in units of km.
(Desperately need help with Part 2)
Answer:
Final speed of car = 9.834 m/s
Displacement = 0.035 km
Explanation:
Part 1
Final velocity, v of an object moving with an acceleration a m/s² for t seconds and an initial velocity u m/s is given by the formula
v = u + at m/s
[tex]\textrm{Initial velocity } u = 22.1 km/h\\\\\textrm{Convert this to m/s:}\\\\\textrm{1 km/h = 1000m/3600 s}\\\\ 22.1 km/h = 22.1 x 1000/3600 = 6.139 m/s\\\\\boxed{\textrm{Final velocity } v = u + at = 6.138 + 0.84 x 4.4 = 9.834 m/s}[/tex]
Displacement s in m for a constant acceleration of a m/s² for a time t seconds is given by the formula:
[tex]x = ut+\dfrac{1}{2}at^2[/tex]
where u is initial velocity
Plugging in the values we get
[tex]s = 6.139\cdot 4.4 + \dfrac{1}{2}\cdot0.84\cdot (4.4)^2 = 35.143 \;\mathrm {meters}[/tex]
35.143 meters = 35.143/1000 = 0.035 km
Answer:
1) 9.83 m/s (2 d.p.)
2) 0.04 km (2 d.p.)
Explanation:
Constant Acceleration Equations (SUVAT)
[tex]\boxed{\begin{array}{c}\begin{aligned}v&=u+at\\\\s&=ut+\dfrac{1}{2}at^2\\\\ s&=\left(\dfrac{u+v}{2}\right)t\\\\v^2&=u^2+2as\\\\s&=vt-\dfrac{1}{2}at^2\end{aligned}\end{array}} \quad \boxed{\begin{minipage}{4.6 cm}$s$ = displacement in m\\\\$u$ = initial velocity in ms$^{-1}$\\\\$v$ = final velocity in ms$^{-1}$\\\\$a$ = acceleration in ms$^{-2}$\\\\$t$ = time in s (seconds)\end{minipage}}[/tex]
When using SUVAT, assume the object is modeled as a particle and that acceleration is constant.
Part 1Given:
u = 22.1 km/ha = 0.84 m/s²t = 4.4 sConvert km/h into m/s by dividing by 3.6:
[tex]\implies \sf 22.1\;km/h=\dfrac{22.1}{3.6}\;m/s[/tex]
Substitute the given values into the formula and solve for v:
[tex]\begin{aligned}v&=u+at\\\implies v & = \dfrac{22.1}{3.6}+0.84(4.4)\\v & = 6.1388...+3.696\\v & = 9.834888...\\v & = 9.83 \sf \;m/s\;(2\:d.p.)\end{aligned}[/tex]
Therefore, the final speed of the car was 9.83 m/s (2 d.p.).
Part 2Substitute the given values into the formula and solve for s, remembering to use the initial velocity in m/s:
[tex]\begin{aligned}s & = ut+\dfrac{1}{2}at^2\\\implies s &=\dfrac{22.1}{3.6}(4.4)+\dfrac{1}{2}(0.84)(4.4)^2\\s &=27.0111...+8.1312\\s &=35.1423111...\sf m\end{aligned}[/tex]
Convert meters into kilometers by dividing by 1000:
[tex]\implies \dfrac{35.1423111...}{1000}=0.0351423111...=0.04 \sf \; km\;(2\:d.p.)[/tex]
Therefore, the displacement of the car after 4.4 s was 0.04 km (2 d.p.).
(Figure 1) shows a 5.4 N force pushing two gliders along an air track. The 150 g spring between the gliders is compressed. The spring is firmly attached to the gliders, and it does not sag.
a)How much force does the spring exert on glider A ?
b)How much force does the spring exert on glider B ?
(a) The force the spring exert on glider A is 1.88 N.
(b) The force the spring exert on glider B is 2.82 N.
Acceleration of the springThe acceleration of the spring is calculated as follows;
F = ma
a = F/m
a = 5.4 N / (0.15 kg + 0.4 kg + 0.6 kg0
a = 4.7 m/s²
force the spring exert on glider AF(A) = ma
F(A) = 0.4 kg x 4.7 m/s²
F(A) = 1.88 N
force the spring exert on glider BF(B) = 0.6 kg x 4.7 m/s²
F(B) = 1.88 N
F(B) = 2.82 N
Thus, the force the spring exert on glider A is 1.88 N.
The force the spring exert on glider B is 2.82 N.
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An object is launched across a room. How can a student determine the average horizontal velocity of the object using a meter stick and a calculator
1) The student can measure the initial velocity and acceleration and use that information to calculate objects final velocity.
2) The student can measure the recoil distance of the throwing mechanism and then calculate the velocity from the conservation of momentum principle.
3) The student can measure the horizontal distance traveled, determine the flight time from the vertical drop, and then calculate the average horizontal velocity.
4) The student can measure the fall distance and travel time from the horizontal displacement and then calculate the average horizontal velocity.
The student can determine the average horizontal velocity of the object using a meter stick and a calculator by measuring the horizontal distance traveled, determine the flight time from the vertical drop, and then calculate the average horizontal velocity.
So option 3 is correct.
What is horizontal velocity?The horizontal velocity can be described as the velocity of any projectile along a horizontal path.
From the options given, the student can measure the horizontal distance traveled, determine the flight time from the vertical drop, and then calculate the average horizontal velocity.
Gravity acts only in the vertical direction and doesn't affect horizontal motion directly.
Horizontal velocity comes from forces that act in the x-axis, that is directions from side to side and not up or down.
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briefly define what are micro-organisms
1. Which of the following secondary sex characteristics do not develop during the teen years?
Odevelopment of breasts in girls
Odevelopment of body hair in boys
Odevelopment of ovaries in girls and testes in boys
Odevelopment of acne in boys
Answer:
Development of acne in boyw
What is the magnitude of the resultant of a 61m north and 21m south vector?
Answer:
1281
Explanation:
what is the magnitude of the resultant of a 61m north and 21m south vector
1. Do stars going supernova have any impact on
allowing life to exist? Why?
Yes, the stars going supernova will have impact on allowing life to exist in nearby planets.
When a star goes supernova, a large amount of radiation is emitted. So, if a nearby planet inhabiting life has a ozone layer, it will be depleted. This results in increased harmful radiation levels on the ground. There will be mutations in organisms that can survive the radiations. Those that are not strong will die.
A supernova is the explosion of a star. This phenomenon happens when a star's nuclear fuel in its core runs out. As a result the pressure created by the burning in its core becomes completely null. Thus the gravity is only force acting, so the star collapses on itself emitting huge quantities of light and harmful radiation.
Therefore, the stars going supernova will have impact on allowing life to exist in nearby planets.
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True or False? Air resistance acts in the direction the object is moving in.
Read a sample of one type of narrative nonfiction below and determine the type of narrative nonfiction: Monique went through many trials and tribulations and decided to write a book about this particular period in her life. Read a sample of one type of narrative nonfiction below and determine the type of narrative nonfiction: Monique went through many trials and tribulations and decided to write a book about this particular period in her life
Memoir is a type of narrative nonfiction: Monique went through many trials and tribulations and decided to write a book about this particular period in her life.
Because it combines elements of creative writing with the relation of facts required to produce a work of nonfiction, narrative nonfiction is a type of writing that is occasionally referred to as creative nonfiction. This genre comprises of writing that is factually accurate yet written with a creative flair that contributes to improving the work's flow and appeal. The genre of narrative nonfiction can include journalism and some genres of biography, essay, memoir, and personal essay. When compared to plain nonfiction, this genre is very new, and as the genre has developed, so too has the scrutiny that is applied to this kind of writing.
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Which type of circuit has
more than one path for
electrons to flow?
A. Parallel
B. Series
C. Neither
Answer:
A. Parallel connection
Answer:
Parallel circuit to be exact
A race car rounds a curve at 55 m/s. The radius of the curve is 434 m, and the car's mass is 685 kg. (Assume the car's speed remains constant. Take the radially inward direction to be positive. Indicate the direction with the sign of your answer.)
(a) What is the car's (centripetal) acceleration?
______m/s2
What is it in g's?
____g
(b) What is the centripetal force acting on the car?
____N
PLEASE HELP!!!
The car's (centripetal) acceleration would be 6.97 meters / second², its value in terms of acceleration due to gravity would be 0.71 g and the centripetal force acting on the car would be 4774.5 Newtons.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem a race car rounds a curve at 55 m/s. The radius of the curve is 434 m, and the car's mass is 685 kg. (Assume the car's speed remains constant. Take the radially inward direction to be positive.
The centripetal acceleration of the car = v² / r
=55² / 434
= 6.97 meters / second²
The centripetal force acting on the car = m×v² / r
=685× 6.97
=4774.50 Newtons
Thus, the centripetal force acting on the car would be 4774.5 Newtons.
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An Alaskan rescue plane traveling 45 m/s
drops a package of emergency rations from
a height of 110 m to a stranded party of
explorers.
margolalaraq
The acceleration of gravity is 9.8 m/s².
Where does the package strike the ground
relative to the point directly below where it
was released?
Answer in units of m.
The package strike the ground relative to the point directly below it was released at 213.3m.
Equation:Given values,
Velocity of plane 45 m/s
Acceleration due to gravity 9.8 m/s²
horizontal component of plane velocity is
ux = 45 m/s
Vertical component is zero
In the same way
ay = - 9.8 m/s²
ax = .0 m/s^2
Motion in y direction = -110 m
From equation of motion time of flight is
d = u x t + 1/2 at²
where,
d is distance
u is velocity initial
a is acceleration
t is time
So, putting values
-110 = 0 + 1/2 (-9.8)t²
-110 = -4.9t²
t² = 110 / -4.9
t² = 22.45
t = √22.45
t = 4.74
Motion in x direction,
d = u x t + 1/2 at²
d = ( 45 x 4.74) + 1/2 (0) 4.74²
d = 213.3 + 0
d = 213.3m
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A satellite orbiting Earth at an orbital radius [tex]r[/tex] has a velocity [tex]v[/tex]. Which represents the velocity if the satellite is moved to an orbital radius of [tex]4r[/tex]?
A. [tex]4v[/tex]
B. [tex]\frac{1}{2}v[/tex]
C. [tex]\frac{1}{4}v[/tex]
D. [tex]2v[/tex]
Answer: C
Explanation:
The bigger the satellite, the longer it will take to get around the satellite. Hence, the velocity would get smaller.
r*v=4r*?
r*v/4r=?
r/4r * v=?
1/4 * v=?
?=v/4 ==> C
In 1954 the English runner Roger Bannister broke the four-minute barrier for the mile with a time of 3:59.4 s (3 min and 59.4 s). In 1999 the Moroccan runner Hicham el-Guerrouj set a record of 3:43.13 s for the mile. If these two runners had run in the same race, each running the entire race at the average speed that earned him a place in the record books, el-Guerrouj would have won. By how many meters?
Answer:
Bannister = 3:59.4 sec = 239.4 sec
Guerruoj = 3:43.13 = 223.13 sec
1 mi = 5280 ft
G = 5280 / 223.13 = 23.66 ft/sec
B = 5280 / 239.4 = 22.06 ft/sec
In 223.13 sec B runs 223.13 * 22.06 = 4922 ft
G Wins by 358 ft = 119.3 yds = 109.1 meters
What is the weight of a 12.5kg mass?
What is the mass of a 2.5N weight?
200N are weighed. What is the mass?
What will a scale read for a 4kg mass?
1. The weight of a 12.5 kg mass is 122.625 N
2. The mass of a 2.5 N weight is 0.255 kg
3. The mass of a 200 N weight is 20.4 kg
4. The scale read for a 4 kg mass is 39.2 N
What is the relationship between weight and mass?The mass of a substance is the quantity of matter present in that substance.
The quantity of matter or mass of a substance is constant and is measured using a weighing balance.
The weight of a substance is the product of the mass of a substance and the acceleration due to gravity.
The weight of a substance varies and is measured using a spring balance and the unit is N.
Weight = m * g
where;
m is mass in kg
g = 9.81 m/s²
Considering the given substances:
1. The weight of a 12.5 kg mass = 12.5 * 9.81
The weight of a 12.5 kg mass = 122.625 N
2. The mass of a 2.5 N weight = 2.5/9.81
The mass of a 2.5 N weight = 0.255 kg
3. The mass of a 200 N weight = 200/9.81
The mass of a 200 N weight = 20.4 kg
4. The scale read for a 4 kg mass = 4 * 9.81
The scale read for a 4 kg mass = 39.2 N
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A transverse wave can be graphed as position vs. time or y-position vs. x-position. If
you want to determine the wavelength of a transverse wave, which graph should
you use? Explain
To determine the wavelength of a transverse wave, we use the graph of y-position vs. x-position.
What is a transverse wave?A transverse wave is a wave in which the direction of propagation of the wave is perpendicular to the direction of the disturbance causing the wave.
Plotting a transverse wave,
the y - direction represents the direction of disturbance of the wave, the x - direction represents the direction of propagation of the wave and t axis represents the time of travel of the waveNow, we can have two graphs namely,
position vs. time or y-position vs. x-position.Which graph will we use to determine the wavelength of a transverse wave.If we plot a cycle of each graph above, we see that position is plotted against time and y-position is plotted against x-position.
We note that the x - position is the direction of travel of the wave in which we measure its wavength. Since the wavelength is the x - position after one cycle, so, we use the graph of y-position vs. x-position to find its wavelength.
So, to determine the wavelength of a transverse wave, we use the graph of y-position vs. x-position.
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According to the conservation of momentum, if a smaller football player collides with a
much larger football player, what can be said about the movement of each player after
the collision?
Although the bigger football player will move, his speed will be substantially slower than the smaller players due to his greater mass.
According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced. As a result, momentum cannot be gained or lost.
When a collision occurs, the point of impact is generated by two equal and opposing forces. The heavier mass will be forced to accelerate by the force applied to it, whereas the smaller mass will be forced to slow down by the force applied to it.
Because of their greater mass, larger masses will accelerate more slowly, reducing their velocity.
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what is The physical meaning of the slope for the kinetic frictional force vs. normal force graph
The physical means of the slope between the static friction and the normal pressure is the coefficient of static friction of the surface on which the object is located.
Mathematically fstatic≤usΝ in which μs is the coefficient of friction and slope among fs and N will provide this μs mentioning that static friction increases with an increase in everyday pressure and vice versa. but we will see this linearity between fs and N most effective for the most static frictional pressure and till fs< usN we can't observe this linearity and when fs=uSN we will look at this linearity.
The slope of this graph represents the coefficient of friction, The more the force the more the friction because the pressure is higher the downward pressure is extra consequently the object. So the friction on the shoe does rely on the load. So the slope of the graph represents the coefficient of friction. Kinetic friction importance is directly proportional to the regular pressure magnitude and the roughness between the sliding surfaces. Static friction magnitude is immediately proportional to the normal pressure importance and the roughness among the sliding surfaces.
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Consider the case of an object moving with
constant acceleration a along a straight line.
If we plot v(t) versus t, we find that v(t) plots
as a straight line with some slope.
What is the physical meaning of that slope?
The straight line in the velocity versus time graph has a physical significance as it depicts constant acceleration of the motion.
What is acceleration?Acceleration is a physical quantity which is defined as the change of velocity per unit time it is a vector quantity and therefore can be both positive and negative.
What is velocity versus time graph?Velocity versus time graph is the depiction of emotion in which the y-axis represents the velocity of the motion and the x-axis represents the time the graph can either be a positive state line or a curve depending on the acceleration of the motion.
According to the question the velocity versus time graph in our case is a straight line.
A straight line in a velocity versus time graph means that motion has a constant acceleration.
The following conclusion can also be reached from the use of differential calculus as we differentiate velocity with respect to time we get a new physical quantity that is known as acceleration.
On differentiating velocity with respect to time we will get a new value that will represent the change in velocity per unit time and since from the definition of acceleration we know that acceleration is change in velocity per unit time therefore we can conclude that the straight line in the velocity time graph depicts constant acceleration.
Therefore, The straight line in the velocity versus time graph has a physical significance as it depicts constant acceleration of the motion.
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what is the value of the x component of the car's average velocity, in meters per second, during the given time interval
To find the component of car's average velocity along X-axis, the angle between the the direction of the velocity and the X-axis must be known.
The value of x component of the car's average velocity is Vcosx.
Calculation of the x component of the car's average velocityLet the angle be = x
The X-component of the car's average velocity = Vcosx.
V is the magnitude of the velocity.
To calculate the y component of the car's average velocity
The Y-component of the velocity = Vsinx
What does the phrase "average velocity" actually mean in context?The difference between the change in position or displacement (x) and the time periods (t) during which the displacement happens is known as average velocity. Depending on the direction of the displacement, the average velocity could be either positive or negative. Meters per second (m/s or ms-1) is the SI unit of measure for average velocity.
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A flowerpot falls from a window sill 36.5 m
above the sidewalk.
What is the velocity of the flowerpot when
it strikes the ground? Choose upwards to be
the positive y direction. The acceleration of
gravity is 9.81 m/s
2
Answer in units of m/s.
When a flowerpot falls from a window sill 36.5 m
above the sidewalk, then the velocity of the flowerpot is 26.7 m/s.
From Newton's third equation of motion,
v^2 = u^2 + 2gh
where,
h is the height of the object or body from ground
u is the initial velocity of the body or object
v is the final velocity of the body or object
g is the acceleration due to gravity
Now, as we know that
Flowerpot is at rest. So, u = 0
g = 9.81m/s^2
h = 36.5m
By substituting all the values, we get
v^2 = 2 × 9.81 × 36.5
= 716.13
v = 26.7m/s
Thus, we concluded that when a flowerpot falls from a window sill 36.5 m
above the sidewalk, then the velocity of the flowerpot is 26.7 m/s.
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A reconnaissance plane flies 404 km awayfrom its base at 730 m/s, then flies back to its base at 1095 m/s.What is it’s average speed?
Answer in units of m/s
The average speed of the plane is 875.999 m/s.
Average speed can be defined as the ratio of total distanced travelled by the object to that of total time taken to cover the distance.
Mathematically, Average speed = Av = [tex]\frac{Total Distance}{Total Time}[/tex]
According to the question,
Speed of the plane away from its base V₁ = 730 m/s
Speed of the plane when it flies back V₂ = 1095 m/s
Plane flies the distance D = 404 km
Total Distance covered by the plane S = 404 * 2 km
(because the distance travelled by the plane when going away from the base and then flying back to the base is same)
Therefore S = 808 km = 808 ˣ 10³ m
Time taken by the plane while flying away from the base T₁ = [tex]\frac{D}{V1}[/tex]
T₁ = [tex]\frac{404000}{730}[/tex] = 553.425 s
Time taken by the plane while flying back to the base T₂ = [tex]\frac{D}{V2}[/tex]
T₂ = [tex]\frac{404000}{1095}[/tex] = 368.949s
Total Time T = T₁ + T₂ = 922.375 s
Therefore Av = [tex]\frac{Total Distance}{Total Time}[/tex]
= [tex]\frac{D}{T}[/tex] m/s
= [tex]\frac{808000}{922.375}[/tex] m/s
= 875.999 m/s
The average speed of the plane will be 875.999 m/s.
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A butcher throws a cut of beef on spring scales which oscillates about the equilibrium
position with a period of T = 0.500 s. The amplitude of the vibration is A = 2.00 cm
(path length 4.00 cm). Find:
i. Frequency
ii. the maximum acceleration
iii. the maximum velocity
iv. the acceleration when the displacement is 1.00 cm
v. the velocity when the displacement is 1.00 cm
vi. the equation of motion as a function of time if the displacement is A at t = 0
The frequency of the simple harmonic motion is 2 Hertz , the maximum acceleration is 3 u and the maximum velocity is equal to 2.48 m/s.
What is oscillation?Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value or between two or more different states.
What is the time period?Time period in periodic oscillation refers to the time taken by the system to complete one oscillation.
Given:
Time period of the oscillation = 0.5 seconds
Amplitude of the oscillation = 2 cm
For determining frequency we use the formula of frequency.
f = 2π/T
Where,
f is the frequency of the oscillation
T is the time period of the oscillation
On substituting values we get,
Frequency (f) = 1/0.5
Frequency (f) = 2 Hertz
For determining maximum acceleration we use,
a = A × w × w
Where,
a is the acceleration
A is amplitude of the SHM
w is the angular frequency
Now,
a = A × w × w
a = 0.02 × 12.4× 12.4
a = 3 u
For maximum velocity we use,
v = A × w
Where v is maximum velocity
v = 0.02 × 12.4
v = 2.48 m/s
Therefore, the frequency of the simple harmonic motion is 2 Hertz , the maximum acceleration is 3 u and the maximum velocity is equal to 2.48 m/s.
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The law of Conservation of energy states that energy can be transformed from one form to another, but it cannot be _______ or ________. created, changed created, destroyed changed, destroyed radiated, conducted
Answer:
The low of conservation of energy states that "energy can neither be created nor be destroyed but it can be changed from one form to another".
What is the kinetic energy of a 29 kg dog that is running at a speed of 8.5 m/s (about 17 mi/h)?
The kinetic energy of of given data is K.E. = 1,047.62 J
Equation:To calculate kinetic energy using the formula,
K.E. = 1/2 m v²
where,
K.E is kinetic energy
m is mass
v is velocity
So, Putting values,
K.E. = 1/2 x 29 x (8.5m/s)²
K.E. = 1,047.62 J
What is kinetic energy in simple words?The energy an object has as a consequence of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the object, which then moves at a new, constant speed.
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