Answer:
12.01
Explanation:
Given parameters:
Abundance of C-12 = 98.89%
mass of isotope = 12amu
Abundance of C - 12 = 1.11%
mass of isotope = 13.003
Unknown:
Average atomic mass of carbon = ?
Solution:
The average atomic mass ;
R.A.M = (mass of isotope x abundance of isotope)-12 + (mass of isotope x abundance of isotope)- 13
Insert the parameters and solve;
R.A.M =( 12 x 98.89%) + (1.11% x 13.003)
R.A.M = 11.87 + 0.14 = 12.01
Gravitational force acts on all objects in proportion to their masses. Why, then, doesn’t a heavy object fall faster than a light object?
Its becuase weight and mass are different. Even if an object weighs more than another object it might not have more mass than the other object.
if i want an thrilling job witch should i chose im stuck beetween,
1. horse rider
2. drawer
3. photographer
Answer:
1. horse rider
Explanation:
Why did scientists agree to use one system of measurement?
a) so they could develop theories more easily
b) so they could record their data accurately
c) so they could benefit from using the most accurate measurement system
d) so they could readily interpret one another's measurements
c) so they could benefit from using the most accurate measurement system
Explanation:
yuh
Given that on the moon g = 1.6 m/s2, and on Earth g = 9.8 m/s2, if a car on the moon weighs 3.8 N, what is its mass on Earth?
Weight = m • g
On the moon, 3.8N = m • 1.6 m/s^2
m = 3.8 / 1.6
m = 2.38 kg
Anywhere !
Everywhere !
Your little brother just learned to ride his new bike. If he travels 5.0 m in 130 s, what is his
average speed?
26 seconds per meter
Answer:
0.038m/s
Explanation:
5.0/130=0.038m
Which skill is least useful on defense in basketball?
A.Jumping ability
B.Speed
C.Strength
D.Passing ability
Max and his friend want to ride in the front car of a roller coaster. What happens to the car's kinetic energy as the roller coaster car is pulled to the top of the first big hill?
A.
Its kinetic energy is released into the air at the top of the hill.
B.
Its kinetic energy is added to the potential energy to give it twice as much speed.
C.
Its kinetic energy is converted to potential energy at the very top of the hill.
D.
Its kinetic energy is transferred to the wheels so it can roll quickly down the hill.
Answer:
KE =1/2mv^2
Explanation:
KE depends upon movement of the body
Two resistors of resistances 6 Ω and 12 Ω, are connected first in series, and then in parallel in a circuit across a battery of 6 V. Calculate the ratio of the heat produced in the series combination to that of the parallel combination of resistors.
Answer:
0.0136
Explanation:
For the series connection
Effective resistance= 6 + 12= 18 ohm
Current= 6/18=0.33 A
Heat= I^2R= 0.33^2 × 18= 1.96 J
For parrallel
Effective resistance= 6^- 1+12^-1 = 0.167 + 0.083= 0.25 ohm
Current= 6/0.25= 24 A
Heat= 24^2 × 0.25=144J
Ratio of series to parallel= 1.96/144=0.0136
While in the air (neglecting air resistance) the
vertical component of a projectile's acceleration
-remains constant
-increases
-decreases
Anwser
For general projectile motion with no air resistance, the horizontal component of a projectile's velocity ... D. first decreases and then increases ... E. The speed of the object is constant but its velocity is not constant. C ... Neglecting air resistance, when the package hits the ground
Explanation:
Which of the following is the first step in the technological design process?
HELP ASAP PLEASE!! due: 11/20/20
A. construct a prototype
B. evaluate the design
C. define a need or problem
D. research existing solutions
Answer:
C
Explanation:
you cannot any other thing if you don't even know what you are designing.
The first step in the technological design process is to define a need or problem, therefore the correct answer is option C.
What are the stages of technological design?There are mainly five stages of technological design,
Identifying the issue that needs to be solved is the first step in every problem-solving process.
The second stage is to imagine; during this phase,
The chosen product from the imaging stage is planned in the third stage.
Testing, evaluating, and modifying the product are the fourth stage.
The sharing of your solution is the fifth step. To gather comments, discuss your ideas with others, and enhance your product,
Technological designing is a lengthy process that involves a number of steps but identifying the problem we are going to is the most important step among all of the steps because a wrong approach to the problem would lead to faulty design in the later stages.
Thus, the first step in the technological design process is to define a need or problem, therefore the correct answer is option C.
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Felix connects a wire coil to an ammeter and moves a bar magnet around the
outside of the coil. He wants to show that a moving magnet can cause an
electric current in a wire. Which change should Felix make so that the
ammeter will detect a current?
A. He must arrange the connecting wire in the correct direction.
B. He must rotate the magnet as it moves around the wire coil.
C. He must move the magnet along the connecting wires.
D. He must move the magnet through the inside of the wire coil.
Answer: C.
He must move the magnet through the inside of the wire coil.
Explanation:
To detect a current Felix must move the magnet around wire coil. This magnetic field around the wire make the electrons mobile and creates an electrical current. Hence. option B is correct.
What is magnetically induced current?Electricity can be created using magnetic' characteristics. Electrons are pushed and pulled by moving magnetic fields. Electrons in metals like are loosely held in their valence shell. Hence they can be transited easily.
The electrons in the wire are pushed when a magnet is moved around it or when a coil of wire is moved around a magnet, producing an electrical current. Kinetic energy, or the energy of motion, is effectively transformed into electrical energy via electricity generators.
The coil of metallic wire can produce a magnetic field in turn also. This is what called the electromagnetic induction. Therefore moving the bar magnet around the coil generates an electric current and results in a deflection in ammeter.
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What mass of water can be heated from 25.0° C to 50.0° C by the addition of 2825 J of heat energy if the specific heat capacity of water is 4.184 J/goC?
35 g
13 g
27 g
20 g
Answer:
Mass, m = 27g
Explanation:
Given the following data;
Initial Temperature, T1 = 25°C
Final temperature, T2 = 50°C
Quantity of heat = 2825J
Specific heat capacity of water = 4.184
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where,
Q represents the heat capacity. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.Making mass, m the subject of formula, we have;
[tex] m = \frac {Q}{cdt} [/tex]
Change in temperature, dt = T2 - T1
Change in temperature, dt = 50-25 = 25°C
Substituting into the equation, we have;
[tex] m = \frac {2825}{4.184 * 25} [/tex]
[tex] m = \frac {2825}{104.6} [/tex]
Mass, m = 27g
Therefore, the mass of water that can be added is 27 grams.
explain the force of air resistance depends on an objects speed
Answer:
more massive objects fall faster than less massive objects because they are acted upon by a larger force of gravity
Explanation:
what is the reason for the apparent motions of the sun and other stars across the night sky?
Answer:
Answer is A
Explanation:
GOT IT RIGHT ON A P E X :)
The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.
What is rotation of earth?The rotation of the planet Earth around its own axis and variations in the orientation of the rotation axis in space are referred to as Earth's rotation or Earth's spin. Earth rotates prograde in an easterly direction. Earth rotates against the direction of the northern polar star Polaris.
The Northern Hemisphere's North Pole, sometimes referred to as the Geographic North Pole or Terrestrial North Pole, is where the Earth's axis of rotation and surface meet. The North Magnetic Pole of the Earth is distinct from this place. The other location where the axis of rotation of Earth crosses the surface is the South Pole, which is located in Antarctica.
The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.
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Use the data provided to calculate the gravitational potential energy of each cylinder mass. Round your answers to the nearest tenth.
3 kg: kJ
6 kg: kJ
9 kg: kJ
Answer: 3kg: 14.7 6kg: 29.4 9kg: 44.1
Explanation: just did it on Edge
Answer:
Explanation:
3 kg 14.7
6kg 29.4
9kg 44.1
A 920-kg compact car moving at 92 m/s has approximately 3,893,440 Joules of kinetic energy. What is the change in kinetic energy if it is moving at 36 m/s?
Answer:
Change in kinetic energy = 3297280 J
Explanation:
Given that,
Mass, m = 920 kg
Speed of a car, v = 92 m/s
Kinetic energy, K = 3,893,440 J
If the speed of a car, V = 36 m/s
Net kinetic energy is given by :
[tex]K_n=\dfrac{1}{2}mV^2\\\\=\dfrac{1}{2}\times 920\times (36)^2\\\\K_n=596160\ J[/tex]
The change in kinetic energy = 3,893,440 - 596160
= 3297280 J
So, the change in kinetic energy of the car is 3297280 J.
A 0.30 kg ball is struck by a club with a +900 N force with a contact time of 0.017 s. What is the impulse on the ball?
Answer:
15.3N/s
Explanation:
Given parameters:
Mass of ball = 0.3kg
Force = 900N
Contact time = 0.017s
Unknown:
The impulse on the ball = ?
Solution:
Impulse is the product of force and time of action of the force;
Impulse = force x time
Now insert the parameters and solve;
Impulse = 900 x 0.017 = 15.3N/s
When a wave is absorbed by a medium, its energy is transferred to the medium. The energy is most often transformed into thermal energy. What measurement could you make to confirm the transfer and transformation of wave energy?
Answer:
TEMPERATURE
Explanation:
When a wave is absorbed by a material medium, different phenomena occur, but the collisions with the other particles causes the energy to be transformed into internal energy in the atoms and molecules of the material, with TEMPERATURE measurements the increase in the internal energy of the material.
What is the function of the Integumentary System?
Answer:
The skin and accessory structures perform a variety of essential functions, such as protecting the body from invasion by microorganisms, chemicals, and other environmental factors; preventing dehydration; acting as a sensory organ; modulating body temperature and electrolyte balance; and synthesizing vitamin D.
Explanation:
A net force of 34 N is applied to accelerate an object at a rate of 2.5 m/s. What is the mass of the object?
Answer:
mass = 13.6 kgExplanation:
F = m * a
34 = m (2.5)
m = 34 / 2.5
m = 13.6 kg
20 POINTS & GIVING BRAINSLET IF ITS CORRECT.
DUE IN LESS THAN 5 MINUTES PLEASE HELP AND EXPLAIN.
sorry for the quality.
Answer:
it is d all of the above your welcome
The amount of matter in an object is called its weight true or false
Answer:
true
Explanation:
logic
Answer:
false
Explanation:
weight is the force exerted on an object by gravity
what exactly is imprinting?
Answer:
Imprinting is a form of learning in which an animal gains its sense of species identification. Birds do not automatically know what they are when they hatch – they visually imprint on their parents during a critical period of development. After imprinting, they will identify with that species for life.
Explanation:
Which statement best describes the importance of joints in the roadways of Bridges ?
a. Joints strengthen the roadway to support cars and trucks
b. Joints allow the roadway to expand and
contract with varying outside temperatures
c. Joints allow the roadway to expand and contract as cars put force on the bridge
d. Joints allow the bridge to be built in smaller, easier to assemble pieces.
Answer:
I think the answer is A but I could be wrong but I think the answer is A. please let me know if I am wrong.
Answer:
c. Joints allow the roadway to expand and contract as cars put force on the bridge
Explanation:
Joints in the roadways of bridges allows for the roadway to expand and contract as cars put force on the bridge.
The force on the bridge and the ambient temperature causes expansion of the materials used in making the bridge.
Joints allows and accommodate the expansion. As the force is removed and temperature reduces, the road also contracts.Okay so, basically my question is about the Careers in the Education & Training Career Cluster and I've seen so many other answers as in Human Resources Management but my answer options are.. Principal, Teacher, Curator, and Writer. Someone please help. (Also my subject isn't Physics, it's FCS ; Family and consumer sciences)
Answer:
ok, I have taken that class my 8th-grade year I might be able to help what is the question tho kinda confused about that?
Explanation:
sorry ?
Answer:
Principal, Teacher, Curator, Writer
Explanation:
Two cars are traveling at the same speed (100 km/hr). They are traveling in opposite directions. Do they have the same velocity? Why?
Explanation:
well its depends for example one car might be going down the hilll and the other up a hill and there the velocity can change between the cars because of gravity so one can be going faster and the other slower.
What will be the velocity of body in horizontal motion of the body in the air?
Answer: Projectiles travel with a parabolic trajectory due to the influence of gravity. There are no horizontal forces acting upon projectiles and thus no horizontal acceleration, The horizontal velocity of a projectile is constant (a never changing in value.
Explanation: I hoped that helped yall !!
Which action will help you stretch?
A) Bouncing
B) Inhaling and exhaling deeply
C) Eliminating Cardiorespiratory Exercise
D) Holding a pose until it is painful
why did earth most likely form into distinct, separate layers? (HELP ASAP PLZ)
Answer:
The stratification of Earth into its geologic layers was brought about by the formation of the Earth's iron core. The iron core was generated by a combination of radioactive decay and gravitation, which raised the temperature enough for molten iron to form. The migration of molten iron to the center of the Earth displaced the less dense materials toward the surface.The early Earth needed lots of energy to trigger the creation of molten iron. Some of this energy came from radioactive decay. Radioactive elements such as uranium and thorium give off heat when they decay. Radioactive elements were present in greater amounts in the early Earth. The radiation emitted by these elements increased the temperature of the Earth by roughly 2,000 degrees Celsius (about 3,600 degrees Fahrenheit).Gravitational forces both helped the iron accumulate in the center of the Earth and helped generate additional temperature. As the early Earth compacted into a planet thanks to gravity, this compaction gave off heat. As a result, gravitational energy helped raise the temperature of the Earth by an additional 1,000 degrees Celsius (about 1,800 degrees Fahrenheit). In turn, this temperature increase helped sustain the presence of molten iron at the Earth's core.
Explanation:
The hotter temperature in the mantle make the tectonic plates to move apart and form distinct layers. Hence, option C is correct.
What is tectonic movement ?The rocky mantle's base is heated by the core of earth . Buoyancy forces attempt to drive the hottest rocks upward when the densest rock near the mantle's bottom becomes slightly less dense than the somewhat cooler rock above it.
Despite being solid, the rock in the mantle can progressively distort like hot wax because of the intense pressure and heat. As a result, the heated rock gradually pushes through the colder rock.
Cooler rock flows downward to occupy the space near to the core as the hot rock rises, where it gets heated and becomes buoyant enough to rise again later. Near the surface of the Earth, the rising hot rock comes into touch with certain cold rocks, emitting heat, cooling, and lead to the tectonic movement.
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What is meant by the term longitudinal wave?
Answer:
a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.
[tex] \underbrace{ \sf{Required \: Answer}} : [/tex]
Longitudinal waves are those in which the particles of a medium vibrate to and fro in the direction of propagation of the wave through the medium. Sound wave is an example of longitudinal wave.
[tex] \text{Hope \: I \: helped!}[/tex]
[tex] \text{Have \: a \: wonderful \: time!}[/tex]ツ
~ [tex] \sf{TheAnimeGirl}[/tex]
