The center of mass of the three mass system is at 83cm.
What is center of mass?The center of mass of an object or a collection of objects is known. It represents the system's average location by weighing the mass of each component. For straightforward rigid structures with uniform densities, the center of mass is located at the centroid.
What is the calculation of the above problem?Given the mass of the meter stick is:
M = 0.5kg.
Since the meter stick is uniform, the center of mass of the meter stick is at 50cm or 0.5m.
Let the distance of the meter stick's center of mass from 0cm be x1. Then x1 = 0.5m.
Now a mass m2 = 1kg is attached at 50cm mark.
So the distance of m2 from 0cm is x2 = 50cm = 0.5m.
Similarly a mass m3 = 3kg is attached at the every end or 100cm mark. So the distance of m3 from 0cm is x3 = 100cm = 1m.
Now the position of the three mass system from 0cm is given by,
So the center of mass of the three mass system is at 83cm.
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Identical balls are dropped from the same initial height and bounce back to half the initial height. In case 1 the ball bounces off a cement floor and in case 2 the ball bounces off a piece of stretchy rubber.
The average force acting on the ball is biggest in the with the cement floor case 2 when in the collision the ball bounce back to half of its initial height.
It is asked that in which case the average net force on the ball is highest.
According to impulse-momentum theorem,
Impulse I = F.Δt
where, F is the net average force and Δt is the time of contact during the collision.
In the case of collision with the rubber piece the time of contact of the ball and the ball increases by large amount while in the case of cement floor the time of contact is very very less.
The change in momentum which is equal to the Impulse is also biggest in the case of cement floor because the transfer of kinetic energy of the ball in the case of cement floor will be almost immediate.
The Bigger change in momentum and the smaller time of contact makes the average force on the ball is biggest in the case of cement floor case.
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bryan allen pedaled a human-powered aircraft across the english channel from the cliffs of dover to cap gris-nez on june 12, 1979. (a) he flew for 169 min at an average velocity of 3.53 m/s in a direction 45° south of east. what was his total displacement? (enter the magnitude in km and the direction in degrees south of east.)
The total displacement is 3.58 kilometers to the south of the east. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an object is."
A scalar quantity known as distance measures "how much ground an object has traversed" while moving. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an object is. These factors provide the overall displacement: where,
The average speed is v.
Time has come.
The typical speed is:
v = 3.53 m/s
While the time must be changed from minutes to seconds:
t=169*60
=10140s.
Consequently, the displacement's size is
=3.53*10140
=35794 m
=3.58 km
Furthermore, since the direction and speed are identical, the direction is 45° south of east.
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Write the differences between normal forces and tension with suitable examples.
A Normal Force is a force applied in the direction perpendicular to the surface that the force is applied to. An example of this is putting pressure directly down on a table with your hand.
A Tension Force is a force applied in the opposite direction of the object the force is applied to. Tension Forces usually are applied by springs, ropes, and wires. An example of this is a wrecking ball hanging from a crane. There is a Tension Force on the wrecking ball holding it up in the air.
These forces are different from one another based on their directions that the forces are applied. Forces are vectors, so their magnitude is determined by the amount of force applied and their direction. Tension Force can be a Normal Force, but Normal Forces are not always Tension Forces.
Of two identical metal balls, one has a charge 5 times greater than the other. The balls touched each other and returned to the previous distance.
How many times has the interaction force changed in the module if:
1) The balls were charged with the same sign
2) Balls were charged with different marks
What do effective healthcare teams look like? What traits do they have? PLEASE HELP ASAP
First to answer right brainliest
Answer:
There traits are= understanding,fast thinkers,reliable/trustworthy,
Answer:
An effective team is a one where the team members, including the patients, communicate with each other, as well as merging their observations, expertise and decision-making responsibilities to optimize patients
State the similarities between thermonic emissions and liquid vapourization
What thermonic emissions and liquid vaporization have in common is that the particles involved both processes evaporates by the application of heat.
Understanding thermal or heat of vaporization of liquidThe amount of heat energy which is needed by just 1 gram of a liquid substance to boil without being affected by change in temperature.
However, when the thermal liquid of vaporization decreases as temperature increases. It is also affected by intermolecular forces.
Thermonic emissions refers to those electrons which are produced by the application of heat energy.
In conclusion, the major similarity in the task above is that they evaporated by heat.
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HELP THIS IS DUE TODAY who ever answers first (correctly and gives explanation will get brainly)
How much power does a cordless phone use if it draws 0.50 A of current at 6.0 V?
i need it in watts so please write it in forms of Watt
Answer:
3.0 W
I actually had this question before BUT I have no clue how to explain it. I haven't done this in so long. I apologize but that is the correct answer.
Answer:3.0 W
Explanation:
P=VI
P= (6.0 V) (5.0 A)
P= 3.0 W
A young girl sleds across a snowy field. calculate the magnitude of the friction force she experiences if her mass if 35 kg, the sled's mass is 50kg, and the coefficient of of friction with the snow is 0.220
The magnitude of the friction force she experiences=> f= 183.26 N.
friction force isthe force which opposes the motion of an object.
Total mass= 50 + 35 kg=85 kg
g= 9.8 m/s²
coefficient of friction with the snow (ц)=0.220
the friction force acting here is kinetic friction force, which is product of coefficient of friction and force acting on it which is mass × acceleration due to gravity.
the magnitude of the friction force= kinetic friction acting here=ц m g
f = 0.220 × 85 kg × 9.8
f= 183.26 N
friction force acting here is = 183.26 N.
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which organism in this food web is an ominovere
Answer:
Omnivores generally occupy the third trophic level alongside meat-eating carnivores. Omnivores are a diverse group of animals.
Explanation:
Examples of omnivores include bears, birds, dogs, raccoons, foxes, certain insects, and even humans.
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Why will a balloon filled with helium float in air?
A. Helium is a dense as air
B. Helium is denser than air
C. Helium is diatomic molecule
D. Helium is less dense than air
Answer:
D is the correct answer
Explanation:
Helium-filled balloons rise in the air because the density of helium is less than the density of air.
Derive a relation for time period of simple pendulum from dimensional method
The time period of simple pendulum is 2xpi x (l/g)^1/2 when derived by dimensional method.
What is dimensional method and time period of simple pendulum?Dimensional method is a phenomena we use to derive by using the dimensions of the components given.Here the relation of the time period is 2 pi (l/g)^1/2 where l is the length of the pendulum , g is the gravity.Let 't' the time period be directly proportional to m^a l^b g^c where a, b , c are dimensions.We will us the principle of homogeneity of dimensions to solve this.a= 0b + c = 0 , using this method we calculate the value of dimensionless constant k = 2 pi , t= 2 pi (l/g)^1/2.To know more about dimension visit:
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Betty is sitting on of her surfboard out in the ocean. She is waiting for the perfect wave to come along so she can ride it in to shore. As she waits, she notices that the waves roll by in patterns, or sets.
As the top of each wave passes by Betty, it pushes her up. Which part of the wave does this?
Crest is the part of the wave which does this.
A sound wave is the sample of disturbance resulting from the movement of strength visiting through a medium, including air, water or every other liquid or stable remember as it propagates far from the supply of the sound.
The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. The sound source creates vibrations in the surrounding medium. because the supply continues to vibrate the medium, the vibrations propagate far from the supply at the rate of sound, hence forming the sound wave.
A sound wave is not a transverse wave with crests and troughs, however alternatively a longitudinal wave with compressions and rarefactions.
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i'm giving 50 points for you to help me out please
i've been stuck on this for a day, please don't troll me!
Answer:
K ≈ 1.10 × 10⁻¹⁸ J
Explanation:
Apply the Photoelectric Equation of Einstein:
h × f = K - W
Where:
h: Planck's constant = 6,62607015 × 10⁻³⁴ m². kg / s;
K: kinetic energy;
W: work function.
So:
h × f = K - W
6,63 × 10⁻³⁴ × 9.62 × 10¹⁴ = K - (2.90 × 1.6×10⁻¹⁹)
K = 6,63 × 10⁻³⁴ × 9.62 × 10¹⁴ + 2.90 × 1.6×10⁻¹⁹
K ≈ 1.10 × 10⁻¹⁸ J
An investor purchased 50 shares of
stock in a company for $20 per
share. One year later, the investor
sold all the shares for $925. What is
the investor's rate of return?
A. 7.5%
C. -7.5%
B. -8.1%
D. 8.1%
Answer:
B
Explanation:
Kato is out camping with his family, and they decide to start a campfire because of the cold air. After everyone roasts marshmallows to a crispy golden brown, they eat them, and then they decide to go to sleep. Before going to sleep, Kato pours water over the campfire to put it out. He notices that steam drifts from the burned wood and ashes even though the fire is gone and the coals have stopped glowing.
Which statements best describe how energy is conserved in this scenario?
Select all that apply.
The statement that best describes how energy is conserved in this scenario is that the cold air absorbed energy from the water vapor, so it condensed and formed steam and the liquid water absorbed the energy of the fire, so it changed into a gas and evaporated. That is option B and D respectively.
What is conservation of energy?The law of conservation of energy states that energy is neither created nor destroyed but can be changed from one form to another.
At the camping, energy from a lighter is being transferred to the wood and is being sustained by the chemical energy in the wood.
Upon the use of water to extinguish the fire, the liquid water absorbed the energy of the fire, so it changed into a gas and evaporated.
Also around the fire is the cold air which can absorb heat to form steam after condensation.
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If the output work is 500 J and the input work is 380 J, what is the machine efficiency?
Answer:
Therefore machine efficiency is 131.6%.
Explanation:
Data
work output = 500J
work input = 380J
M.E = ?
M.E = work output/work input × 100%
M.E = 500J/380J × 100%
M.E = 131.6%
Therefore machine efficiency is 131.6%.
how close were your experimental results to the theoretical values? what experimental factors contributed to the error between experimental and theoretical measurements of specific heat?
Actual specific heat capacity would be less than the computed experimental specific heat capacity.
The experiment's measurement of water's specific heat capacity, c, is higher than the accepted value for c. This is because some heat was lost to the surroundings, causing the experimental temperature rise to be q smaller than the projected temperature rise.
The quantity of heat energy needed to raise the temperature of 1 kg of a material by 1 K is measured as specific heat capacity. It is crucial because it will show how much energy will be needed to raise or lower an object's temperature by a certain amount for a certain mass.
In this experiment, the primary source of error is heat loss by conduction. The conservation of energy serves as the theoretical foundation for this particular heat test. Energy can be in the form of heat, and in this instance, heat will be transported from the sample to the water.
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5. Modern houses have systems to control internal air temperatures in times of very cold or hot weather. In these homes, hot or cool air is pumped into the interior of the house to help keep the temperature comfortable. Based on what you know about how cool and warm air circulate in the atmosphere, what might an engineer need to consider when designing a heating/cooling system for a home in a cooler climate?
How might the design differ for a house found in a warmer climate?
The engineer should take into account the convective currents that cause higher temperature gases to rise and lower temperature gases to sink.
What is convection?Convection is a term that refers to the way in which heat is transmitted in a liquid or gaseous state as a consequence of the actual movement of particles at different temperatures. If this movement is due to the effect of gravitation, due to differences in density, it is called natural convection.
What might an engineer have to consider when designing a heating/cooling system for a house in a colder climate?The engineer must take into account that, due to their density, the hottest gases tend to rise, and the coldest gases descend. Therefore, he would have to find a way for the hot gases to leave the floor and circulate around the house so that it stays at a warm temperature.
How might the design of a house that is in a warmer climate differ?In the case of a house that is in a warmer climate the engineer should take into account convection because it can find a way in which the hot gases rise and are released through the roof of the house and keep the gases cold inside the house.
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a torpedo fired from a submerged submarine is propelled through the water eit ha speed of 20.00m/s and explodes upon impact with a target 2000.0m away. if the sound of the impact in heard 101.4s after the torpedo was fired, what is the speed of sound in water
The speed of sound in water made by a torpedo with a speed of 20.00m/s and explodes upon impact with a target 2000.0m away is 19.72 m / s
v = d / t
v = Velocity
d = Distance
t = Time
d = 2000 m
t = 101.4 s
v = 2000 / 101.4
v = 19.72 m / s
Velocity of an object is the object's rate of change of position with respect to time. It is mostly denoted as m / s.
Therefore, the speed of sound in water is 19.72 m / s
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Which of the following values are vectors:
I. Instantaneous velocity
II. Distance traveled
III. Average acceleration
Instantaneous velocity and Average acceleration are vectors. Hence, the correct options are (I) and (II).
The instantaneous velocity is a quantity that shows us how quickly an object is moving at any point along its path. The time between the two events approaches zero when the average velocity between two points on the path reaches a certain limit. Instantaneous velocity is a vector with a dimension of length per time, similar to average velocity.
The rate at which the velocity changes is known as the average acceleration vector. It moves in the direction of the velocity change, v. The rate at which a velocity is changing over time is called acceleration. Acceleration is also a vector quantity and must take into account changes in both the magnitude and direction of a velocity. Because velocity has both magnitude and direction, it is referred to as a vector quantity.
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car a is moving at va 60 km/h to the right with respect to the ground car b is moving at vp 80 km/h to the right with respect to the ground. what is the velocity of car a with respect to car b (the velocity of car a measured by car b)?
Car a is moving at va 60 km/h to the right with respect to the ground Car b is moving at vp 80 km/h to the right with respect to the ground. The Relative velocity of a car a with respect to car b is 20km/h .
rPS=→rPS′+→rS′S.r→PS=r→PS′+r→S′S.
The relative velocities are the time derivatives of the position vectors. Therefore,
→vPS=→vPS′+→vS′S.v→PS=v→PS′+v→S′S.
The velocity of a particle relative to S is equal to its velocity relative toS′S′plus the velocity ofS′S′relative to S.
We can extend (Figure) to any number of reference frames.
For particle P with velocities
→vPA,→vPB,and→vPCv→PA,v→PB,andv→PC in frames A, B, and C,
→vPC=→vPA+→vAB+→vBC.v→PC=v→PA+v→AB+v→BC.
We can also see how the accelerations are related as observed in two reference frames by differentiating
:→aPS=→aPS′+→aS′S.a→PS=a→PS′+a→S′S.We see that if the velocity of S′S′ relative to S is a constant,
then →aS′S=0a→S′S=0 and→aPS=→aPS′.a→PS=a→PS′.
This says the acceleration of a particle is the same as measured by two observers moving at a constant velocity relative to each other.
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what instrument is used to measure electromotive force
Answer:
Voltmeter
Explanation:
Voltmeter is used to measure both terminal potential difference as well as electromotive force (e.m.f.) depending upon the connection state of the battery or cell.
.
Determine the acceleration of an object that can go from 0-60 m/s over the course of
1600 m.
Answer:
1.125 m/s^2
Explanation:
Given:
u = 0v = 60 m/sS = 1600 mTo Find:
Acceleration (a)Formula used:
v^2 = u^2 + 2aSwhere,
v = final velocity
u = initial velocity
a = acceleration
S = Displacement
Let the acceleration be a.
Using the above formula, we have
60^2 = 0^2 + 2(a)(1600)
3600 = 3200a
a = 36/32
a = 9/8
a = 1.125 m/s^2
So, the acceleration is 1.125 m/s^2.
A string tied to a rock is being twirled around Fred's head at . If the rock has a mass of 500 g and the string is 50 cm long, what is the tension in the string?
247 N
15.7 N
2467 N
6.25 N
A. The tension in the string being twirled around Fred's head is 247 N.
What is the centripetal acceleration of the rock?The centripetal acceleration of the rock twirled around Fred's head is calculated as follows.
a = ω²r
where;
a is the centripetal accelerationω is the angular velocity of the rockr is the radius of the circular pathThe angular velocity of the rock = 5 rev/s x 2π rad/rev = 10π rad/s = 31.42 rad/s
Substitute the value of the angular velocity and radius of the circular path and calculate the centripetal acceleration.
a = (31.42)² x (0.5)
a = 493.6 m/s²
The tension in the string = ma
= (0.5 kg) x (493.6 m/s²)
= 246.8 N ≈ 247 N
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The complete question is below:
A string tied to a rock is being twirled around Fred's head at 5 cycles/s . If the rock has a mass of 500 g and the string is 50 cm long, what is the tension in the string?
PLEASE THIS IS URGENT!!! I'M STUCK ON THIS QUESTION AND THIS IS MY LAST RESORT!!!!! How do mass and distance affect the gravitational pull of an object?
Answer: The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.
Explanation: Hope this helps. : )
the electric potential of a hydrogen atom is modeled by the equation where a0 is the bohr radius of the atom and q is the charge of the proton. the electric field due to the hydrogen atom is assumed to be spherically symmetric (a) calculate the θ (theta) component of the electric field (6 pts) (b) calculate the ɸ (phi) component of the electric field (6 pts) (c) calculate the r (radial) component of the electric field (6 pts) (d) what is the change in the magnitude of the electric field if a test point moves from the position (7 pts) to the position problem 7 (25 pts) v (r)
In light of this, V=V 0 loge (r/r 0 ) Field E= dr dV =V 0(r0r) eE= r mV2 alternatively, reV0r0=rmV2. V=(m eV 0 r 0 ) \ s1 / 2mV=(m e V 0 r 0 ) 1/2 = constant mvr= 2 nh, also known as Bohr's quantum condition or Hermitian matrix.
Show that the eigenfunctions for the Hermitian matrix in review exercise 3a can be normalized and that they are orthogonal.
Demonstrate how the pair of degenerate eigenvalues for the Hermitian matrix in review exercise 3b can be made to have orthonormal eigenfunctions.
Under the given Hermitian matrix, "border conditions," solve the following second order linear differential equation: d2x/ dt2 + k2x(t) = 0 where x(t=0) = L and dx(t=0)/ dt = 0.
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Jacob has 10 cars for his train. when they are all used, the train cannot make it up the hill. explain what jacob could do to answer this question: how many cars can the train pull up the hill?
To answer the question effectively, Jacob should use trail and error as a method. When doing so, he should be reducing the number of cars loaded in the train one after the other until he successfully make the train pull up the remaining cars.
For Jacob to answer this question and to find the number of cars that the train can pull up the hill, he should use a method know as trial and error. With the method, Jacob would want to decrease the number of cars loaded in the train one after the other, and should be pulling the train up after every trail.
The number of cars loaded in the train can be decreased by one for each case Jacob makes an attempt up to the time he successfully make the train pull up the hill.
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the acceleration of high-speed aircraft is sometimes expressed in g’s (multiple of the standard acceleration of gravity). determine the net upward force, in newtons, that a 90-kg person would experience in an aircraft whose acceleration is 6 g’s straight up. ans.: 6180.3 n
According to Newton's Second Law, an object's net force is equal to the product of its mass and acceleration.
Force (F) can be computed from the 2nd Law of Motion using the following formula:
Fnet = ma( Equation 1 )
due to the fact that the problem did not specify it. We'll suppose the plane is flying straight up.
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A block of wood has a mass of 120 g
and a volume of 200 cm³. What is the density of
the wood?
Answer: 0.6 g /cm^3
Explanation:
Just plug in the value in the equation d=m/v and you will get the answer!
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Natasha wrote a table comparing pure substances and mixtures.
Which correction should be made to Natasha’s table?
Answer: C
Explanation:pure substance is a single kind of matter that cannot be separated into other kinds of matter by any physical means
The correction should be made to Natasha's table is: Mixtures are substances that are not chemically combined.
What is mixture?When two or more separate chemical substances are combined without being chemically linked, the result is referred to as a mixture in chemistry. A mixture is the physically combined state of two or more distinct substances that can take the forms of solutions, suspensions, or colloids while retaining their identities.
Chemical components, such as elements and compounds, can be mechanically blended or mixed to create mixtures without causing any chemical bonding or other chemical change, preserving the unique chemical properties and makeup of each ingredient.
Physical qualities of a mixture, such as its melting point, may be different from those of its constituents even while there are no chemical changes to its constituents.
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