Answer:
angular acceleration = change in angular speed / change in time
angular acceleration = 10 rad/s - 6.3 rad/s / 5s
angular acceleration = 3.7 rad/s / 5s
angular acceleration = 0.74 rad/s^2
example of what happens to particles when their kinetic energy decreases?
Explanation:
When we decrease the temperature, less heat energy is supplied to the atoms, and so their average kinetic energy decreases. When they enter a phase transition, such as freezing from a liquid to a solid, the temperature is not decreasing or increasing, and stays constantAnswer:
when the kinetic energy of a particle decreases, according to me that body must have been freeze, like water particles or intermolecular force which losses when heated (gains more kinetic energy) and when freeze losses kinetic energy.
What does newton’s second law describe ?
A. the tendency of moving objects to stay in motion
B. Action-reaction pairs
C.The attractive force between two objects due to their masses
B. How the amount of mass influences the amount of force needed to move an object
states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
Explain why in both partsthe leaf of the electroscope goes back to itsoriginal positionafter the rod is removed. Refer to rubric element b9 for guidance.
Answer:
The leaves of an electroscope will return to their original position if the electroscope is not grounded because the final condition of the electroscope is the same as it was originally.
If however if one touches the terminal of an electroscope while the scope is exposed to a source of static electricity, and then the contact with the terminal is removed before the source of static electricity is taken away, then any excess electrons will remain on the electroscope and the leaves will remain diverged.
Why are some solutions better conductors of electricity.
Answer:
Strong electrolytes have a better tendency to supply ions to the aqueous solution than weak electrolytes.
Explanation:
The Earth rotates 1 time every 24 hours….
A. How many RPM’s is this?
B. What is the velocity of a person standing on the surface of the Earth 6,378,000 m from the center?
Answer:
A. 0.000694 RPM
B. 463 m/s
Explanation:
Calculate the amount of conventional current flowing in the wire. The measurement was made at a location where the horizontal component of the earth's magnetic field is bearth 2 ✕ 10-5 tesla.
It can be deduced that the amount of conventional current that is flowing in the wire is 0.1608 A.
What is a conventional current?
The conventional current simply means the charge per unit time that is transported in a certain direction.
In this case, the magnetic field B of the wire makes an angle θ with the earth's magnetic field BEarth. From the tangent law of magnetism,
B = BEarth × tanθ
= (2 × 10 - 5T) × tan15 = 5.36 × 10-6 T
The current flowing through the wire will be:
I = 2πrB / μ0
I = 2π × (6 × 10-3m)(5.36 × 10-6 T) / (4π × 10 - 7)
I = 0.1608 A
Therefore, the amount of conventional current that is flowing in the wire is 0.1608 A.
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22. True or False... The original unstable isotope is the daughter isotope.
Answer:
false
Explanation:
You are part of a police unit that has found a powder in a suspect's home. You think it might be a new drug called XYZ. XYZ is an ionic compound that dissolves in water. However, what you think might be a drug may just be salt. Unfortunately there seems to be iron fillings and sand mixed in with the white powder. Your job is to isolate the white powder before sending it to the police lab to be tested to determine if it is salt or XYZ. Give step by step directions on exactly how you will separate your mixture of white powder, iron fillings, and sand.
Answer:
a magnet and sifter
Explanation:
a magnet will get all the iron filling and the sifter will separate the powder and sand
When two objects of unequal masses collide with no other external forces, what happens to the momentum within the system?
During a baseball game, a batter hits a high pop-up. if the ball remains in the air for a total of 6.0 s, how high does it rise? ( Assume Accel. = 10 m/s^2 )
Apply second equation of kinematics
[tex]\\ \rm\hookrightarrow s=ut+\dfrac{1}{2}gt^2[/tex]
[tex]\\ \rm\hookrightarrow s=1/2(10)(3)^2[/tex]
[tex]\\ \rm\hookrightarrow s=5(9)[/tex]
[tex]\\ \rm\hookrightarrow s=45m[/tex]
It rises 45m
which of the following is a vector quantity?
A) The power of a battery.
B) The density of an apple.
C) The volume of a mountain.
D) The weight of an elephant.
which of the following is a vector quantity?
D) The weight of an elephantWeight is the only quantity that is vector among the others. Power, density, volume all are scalar quantities.
Power:- It is a scalar quantity. It doesn't need a direction to specify it.The reason for others to be a scalar quantity is also same!Weight is a scalar quantity because it has a direction. Weight is the force applied by earth on an object. Now, the force must have a direction so it is a vector quantity!!~
Answer:
D) The weight of an elephant
Explanation:
Weight, acceleration, and velocity are all considered vector quantities because gravitational forces of the Earth are required to push them in certain directions. Always remember:
[tex]\displaystyle Vector \hookrightarrow Speed\:AND\:Direction \\ Scalar \hookrightarrow Speed[/tex]
I am joyous to assist you at any time.
Which shows the pieces after the magnet is cut?
N
S
N
S
ON
S
S
N
N
S
S
N
Save and Exit
Nexi
Submit
Mark this and return
Answer:
NS/NS
Explanation:
If we cut a bar of magnet in half pieces according to the question given below, then the magnet will show NS/NS that is the north-south because the smaller pieces of the magnet will become a small magnet with the same property -carrying both the poles , north pole as well as south pole.The poles will not be separated.
Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond
Answer:
It [the diamond] would act like a prism, and make a rainbow, or, the light would break up and disappear
Explanation:
that's what I would think at least
Answer:
a cat could eat it
Explanation:
Fluffy ate my diamond
The largest source of background radiation is
The largest source of background radiation is radon
Which of the following statements is incorrect about the relationship between force,
acceleration, and mass?
a. A small force results in a larger acceleration.
b. An object with greater mass will have smaller acceleration.
c. More force is needed to accelerate an object with a larger mass.
d. A small force results
a small acceleration.
Answer:
A
Explanation:
a small force results in a large acceleration
Any sound with a frequency that is too high for humans to hear is called.
Answer:ultrasound
Explanation:
How does forces affect the acceleration of a body
An object hits the ground travelling at 8 km/hr. It is brought to rest in 0.4 seconds. What is its
acceleration in m/s^2?
Explanation:
8km/hr---→2.22m/s
a=v-u/t
0-2.22/0.4
5.55m/s²
A drag racer accelerates uniformly over a course 400m long. Determine the car's acceleration if it reaches a top speed of 120 m/s. Assume that the car starts from rest.
Apply third equation of kinematics
[tex]\\ \rm\hookrightarrow v^2-u^2=2as[/tex]
Isolate the equation for a
[tex]\\ \rm\hookrightarrow a=\dfrac{v^2-u^2}{2s}[/tex]
[tex]\\ \rm\hookrightarrow a=\dfrac{v^2}{2s}[/tex]
[tex]\\ \rm\hookrightarrow a=120^2/800[/tex]
[tex]\\ \rm\hookrightarrow a=18m/s^2[/tex]
Element tounlukely have a reaction with any element or conpound
Answer:
conpound
Explanation:
help?? ....... ┐(‘～`;)┌
Answer:
(3) Both extensional as well as compressional strain is produced
Explanation:
Both extensional as well as compressional strain is produced
Strain is amount of restoration formed by a restoring force .It is formed in the direction of force applied.calculates the speed of the satellite which performs orbital motion around the earth from an altitude of 3600km?
Answer:
Using the equation for orbital speed
orbital speed= square root of GM/r
Where
G= Gravitational Constant = 6.674x10^-11m^3/kg.s^2
M= mass of The Earth=5.972x10^24 kg
r= the combined radius of The Earth and the height of the satellite above The Earth=6378km+ 3600km= 9978km converting to meters gives (1000m=1km) 9978km*1000m/1km= 9,978,000m or 9.978x10^6m
orbital speed = square root of (6.674x10^-11*5.972x10^24/9.978x10^6= 63198m/s
If a force of 50 newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be? (hint - units!).
Answer:
100 m/s²
Explanation:
50 N / 500 g = 50 N / 0.500 kg = 100 m/s²
7
Analisa wants to save her money in a place where she can have access to it anytime in case of an emergency. Which option BEST fits Analisa's
wishes?
OA.
CD
ОВ.
savings account
Ос.
bond
OD. stocks
Savings account is where she can have access to her money anytime in case of an emergency.
What is a Savings account?This is a type of account run by a financial institution which yields interests on deposits made.
This type of account usually comes with features in which the money can be withdrawn via an ATM card or by visiting the bank to collect it. This therefore makes it the most appropriate choice for Analisa.
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Post WWII Germany was divided into four zones with the Americans occupying one zone and all of the following countries occupying a zone EXCEPT:
a. USSR
c. France
b. Italy
d. England
Answer:
b. Italy
Explanation:
Italy had sided with germany and lost in world war 2
After the Potsdam conference, Germany was divided into four occupied zones: Great Britain in the northwest, France in the southwest, the United States in the south and the Soviet Union in the east.
europeuncedu
Which of the following has kinetic energy?
O a compressed spring
O a stretched spring
O a spring traveling down a flight of stairs
O a spring still at the top of a flight of stairs
It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.
What is Kinetic energy?Since it is moving, it would be a spring moving down a set of steps. A stretched spring, a compressed spring, and a spring at the top of a set of steps are all in motion.
Kinetic energy is a type of power that a moving object or particle possesses.
An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force. A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion.
Therefore, It would be 3: a spring descending a set of steps. As kinetic energy is the energy of motion, it must be in motion.
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A young child holds a string attached to a balloon. What is the reaction force to the child pulling down on the string?
A. The child giggles with laughter.
B. The string pulls up on the child.
C. Gravity pulls the balloon down.
D. The balloon moves.
Answer:
The Answer Choice is C , Gravity Pulls the Balloon down
Answer:
B. may be
Explanation:
Gravity is greater than the string
pulling force.
SORRY IF MY ANSWER NEED ANY.
If the scaled-up man now stands on one leg, what fraction of the tensile strength is the stress on the femur?.
The new cross sectional area and tensile stress is mathematically given as
A=4.8*10^{-4}m^2
X=14:100
Cross sectional area and stress on the femurQuestion Parameters:
To see why this must be so, recall, that the stress on the femur for a man standing on one leg is 1.4%
we scale this man up by a factor of 10 in all dimensions
that a 70 kg person has a femur with a cross-section area
a)
Generally the New cross sectional area is mathematically given as
100A=100*4.8*10^{-4}
A=4.8*10^{-4}m^2
b)
From the initial statement we see that the fraction of the tensile strength is the stress on the femur and will be
[tex]X=\frac{14}{100}[/tex]
X=14$
X=14:100
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Complete Question
Larger animals have sturdier bones than smaller animals. A mouse's skeleton is only a few percent of its body weight, compared to 16% for an elephant. To see why this must be so, recall, that the stress on the femur for a man standing on one leg is 1.4% of the bone's tensile strength. Suppose we scale this man up by a factor of 10 in all dimensions, keeping the same body proportions. (Assume that a 70 kg person has a femur with a cross-section area (of the cortical bone) of 4.8 x 10-4m², a typical value.)
Part A
Both the inside and outside diameter of the femur, the region of cortical bone, will increase by a factor of 10. What will be the new cross-section area? Express your answer using two significant figures.
Part B
If the scaled-up man now stands on one leg, what fraction of the tensile strength is the stress on the femur?
You observe a star system for many weeks. The light curve does not show significant changes in brightness, but a series of spectra show a spectral feature that cyclically appears as one absorption line, then two, then one again, and so on. Is this a binary system
Based on the changes in the light curve and the behavior of the series of spectra, this is a binary system.
How is this is binary system?The characteristics described are those of a binary system with the specific type of system being the spectroscopic binary system.
This is because in a spectroscopic binary system, there won't be significant changes in brightness but as a result of stars orbiting towards and then away from us, spectral features will appear as alternative absorption lines.
In conclusion, this is a binary system.
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1) A 2-kg object moving at 10 m/s has a 4-N force applied to it. Can you predict how the force will affect the object?
es
A) yes, it will slow it down at a rate of 2 m/s?
B) yes, it will speed it up at a rate of 2 m/s
yes, it will speed it up at a rate of 4 m/s?
D) It cannot be determined without more information,
아
Hint
Regular Calc
Graphing Calc
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Answer:D) It cannot be determined without more information,
Explanation:
