Explanation:
This problem bothers on the conservation of mechanical energyThis is the principles in which the energy changes by virtue of the position of the body and when in motion are conserved.
The principle of conservation of mechanical energy states that "energy can neither be created nor destroyed but can be transformed from one form to another".
Based on the principle of energy conservation the correct options are
The potential energy could be increasing, like a ball thrown into the air.The kinetic energy could be lost to friction or air resistance.The ball could be returning to its natural resting state.Why aren't the right-hand rules used to figure out the force exerted on particles traveling parallel to a magnetic field?
Answer:
The answer would be the first option. This occurs because of the presence of the protons. The positive charge of protons and the negative charge of electrons set the balance of each other and usually the net charge turn out to be zero.
Answer:
A magnetic field does not exert a force on particles traveling parallel to the magnetic field.
Explanation:
This is the PLATO answer.
The structure of a main sequence star like our sun can hold for a long time because
A. Gravitation fore is counterbalanced by thermal expansion forces
B. The immense volume of matter
C. The rotational force
Answer: B
The immense volume of matter
Explanation:
Stars are formed by cloud and dust, draw together by gravity.
But the longevity of a main sequence star lives depends on how massive it is. An enormous massive star burns faster due to its enormous material it contains and higher core temperatures caused by greater gravitational forces. While a less massive star will burn slowly and stick around the sun for a very long period. The structure of a main sequence star like our sun can therefore hold for a long time because of the immense volume of matter of star.
2. Which is a possible unit of mass?
gram
liter
meter
Answer:
Gram
Explanation:
Meter is a unit used to measure length and liter is used to measure liquids therefore using process of elimination the answer has to be gram
Which of the following are major problems with fission reactors? maintaining high temperatures disposal of hot water disposing of radioactive waste obtaining fuel
Answer:
hot water
Explanation:
Answer:
a
Explanation:
what was a luxury but is now considered a necessity.
Answer:
a cellphone
Explanation:
pls mark brainliest
Answer:
A car
Explanation:
Two identical speakers are 3.50 m and 5.20 m from a listener. What is the lowest frequency (n = 1) that would cause constructive interference there? PLS HELP!
For constructive interference the path difference must be an integer number of wavelengths. The lowest frequency for this would be the longest wavelength with the path difference equal to one wavelength.
Path length difference(m) = 5.20 - 3.50 = 1.70m.
λ =2m ⇒ f = v/λ
λ/2 =1.70
λ = 3.40m
Taking speed of sound as v = 340m/s:
f = v/λ = 340/3.40 = 100Hz.
What is constructive interference?"When two waves of identical wavelength are in phase, they form a new wave with an amplitude equal to the sum of their individual amplitudes."
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Answer:114
Explanation:
for Acellus
6. Two positive charges, each with 6.0 x 10^-6 C, are 0.75 meters apart.
What force exists between the two charges?
Answer: F = 5.76x10^-1 N
Explanation:
The force between two charges is:
F = k*q1*q2/r^2
where k = 9x10^9 N*m^2/C^2 is the Coulomb's constant.
q1 and q2 = 6x10^-6 C
and r is the distance between the charges, here r = 0.75m
then the force is:
F = ( 9x10^9 N*m^2/C^2)*6x10^-6 C*6x10^-6 C/(0.75m)^2 = 576x10^-3 N
F = 5.76x10^-1 N
We have a positive force, this means that we have a repulsive force.
5. Coal, petroleum, natural gas, propane, and uranium are examples of
energy sources.
A. nonrenewable
B. renewable
C. biomass
D. Geocentric
Answer:
Nonrenewable
Explanation:
Coal, petroleum, natural gas, propane, and uranium are examples of nonrenewable energy sources.
What is energy sources?Energy sources are forms of potential energy that can be used to perform work.
What is nonrenewable energy sources?A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource. Fossil fuels such as oil, natural gas, and coal are examples of nonrenewable resources.
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An electric field around two charged objects is shown.
Two spheres next to each other. Vectors perpendicular to each surface spread out and go to the other charge. The vectors are from the charge on the left, labeled X, and to the other charge, labeled Y. The vectors on the opposite sides of the charges are not bent.
What are the charges of objects X and Y?
Answer:
x is positive y is negative
Explanation:
because the ones from x are moving away from it and the ones from are moving towards it
Answer:
x pos y neg
Explanation:
yes
What is the resistance of a 6.0 m long gold wire (ρgold = 5.6 x 10 -8 Ω-m) whose cross-sectional area is 5x10 -7m 2 ? (Please show some work)
Answer:
R =0.672 ohms
Explanation:
We have,
Length of a gold wire is 6 m
Resistivity of gold is [tex]5.6\times 10^{-8}\ \Omega-m[/tex]
Area of cross section of the wire is [tex]5\times 10^{-7}\ m^2[/tex]
The resistance of a wire is given by the relation as follows :
[tex]R=\rho\dfrac{l}{A}\\\\R=5.6\times 10^{-8}\times \dfrac{6}{5\times 10^{-7}}\\\\R=0.672\ \Omega[/tex]
So, the resistance of the gold wire is 0.672 ohms.
As SCUBA divers go deeper underwater, the pressure from the weight of all the water above them increases tremendously which compresses the gases in their blood. What happens to the volume of gas in their blood as the diver rises quickly to the surface?
A.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to decrease.
B.
As a diver rises, the pressure on their body increases which allows the volume of the gas to decrease.
C.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to increase.
D.
As a diver rises, the pressure on their body increases which allows the volume of the gas to increase.
Answer: A.
As a diver rises, the pressure on their body decreases which allows the volume of the gas to decrease.
Explanation:
The problem is that a diver, experiences an increased pressure of water compresses nitrogen and more of it dissolves into the body. Just as there is a natural nitrogen saturation point at the surface, there are saturation points under water. Those depend on the depth, the type of body tissue involved, and also how long a diver is exposed to the extra pressure. The deeper a diver go, the more nitrogen the body absorbs.
The problem is getting rid of the nitrogen once you ascend again. As the pressure diminishes, nitrogen starts dissolving out of the tissues of the diver's body, a process called "off-gassing." That results in tiny nitrogen bubbles that then get carried to the lungs and breathed out. However, if there is too much nitrogen and/or it is released too quickly, small bubbles can combine to form larger bubbles, and those can do damage to the body, anything from minor discomforts all the way to major problems and even death.
Create a series circuit with a 10-volt battery and four 10-ohm resistors, as shown. Measure the current. A. Based on the voltage and current, what is the resistance of the circuit? (Hint: Use Ohm’s law.)
Answer:
0.25 A
Resistance= 40 ohms
Explanation:
The first, and perhaps most important, the relationship between current, voltage, and resistance is called Ohm's Law, discovered by Georg Simon Ohm and published in his 1827 paper. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual V=IR. Any Electrical device or component that obeys “Ohms Law” that is, the current flowing through it is proportional to the voltage across it ( I α V ), such as resistors or cables, are said to be “Ohmic” in nature.
Since we are not in a laboratory, we can not experimentally measure the current but it can be calculated from ohm's law.
Given that the four resistors are connected in series and
Req= R1 + R2 + R3 + R4
Since all are four ohm resistors
Req= 10 + 10+10+10 = 40ohms
Then;
V= 10 V
R= 40ohms
I= ???
From;
V=IR
I= 10/40
I= 0.25 A
Answer:
See the attachment for circuit and position of ammeter in the circuit to measure the current.
40ohms
Explanation:
Ammeter in always connected in series with other elements in the circuit.
Measured current= 0.25A
According to ohm's law
V=IR
10= (0.25) R
R= 40 ohms
4. Convert this distance( 9cm)into MILES, using the scale provided:
Answer:
Which two gases in the atmosphere are essential to life on Earth? *
Nitrogen and Helium
Oxygen and Carbon Dioxide
Neon and Argon
Hydrogen and Helium
Answer:
Explanation:
Oxygen and carbon dioxide
David drinks a glass of water in his kitchen. The water is at room temperature, and David
decides to make it colder by adding ice. Which of the following describes why the ice cubes
will melt?
A. Liquid water is reacting with solid water to absorb energy.
B. Water is evaporating from the surface of the water.
C. Slow-moving molecules move out of the ice.
D. Heat from the water moves into the ice.
Answer:
I think it's C
Explanation:
During which two phases would surfer’s most likely benefit
A. New and Full Moon
B. New moon and Waxing Crescent
C. Full Moon and Waxing Gibbous
D. 1st Quarter and 3rd Quarter
The phases where surfer’s most likely benefit include D. 1st Quarter and 3rd Quarter.
Surfers will benefit include during the 1st Quarter and 3rd Quarter because there's tidal change. Tidal change is when coastal areas experience two low and high tides.
The benefit of surfing during this period is that it helps jack the waves. Waves transmit energy and this is important to surfers.
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F.
Using this formula m = =, If a car is pushed with a net force
of 5000N, resulting in an acceleration of 3.5m/s2, what is the
mass of the car?
a 1438.5kg
b 1428.6kg
c 1328.6kg
d 1421.6kg
Answer:
C
What is the answer please help her
Please help.
To which 2 systems does the heart belong:
A. Circulatory system and Respiratory system
B. Circulatory system and Muscular system
C. Circulatory system and digestive system
D. Circulatory system and Reproductive system
Answer:
A
Explanation:
circulatoy system and respiratory
Answer:
A
Explanation:
;3
Please I need help!!! ASAP!!!
Do waves transfer matter?
Answer: Light energy only travels through empty space absent of mass energy and kinetic energy only travels through a medium full of mass energy. ... Waves don't transfer mass because mass is not the same as a wave. Mass can hold “extra” energy but it is that energy that moves through it as a wave, not the particle itself.
In a wave phenomenon, energy can move from one location to another, yet the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter. Waves are seen to move through an ocean or lake; yet the water always returns to its rest position.
Explanation:
TRUE or FALSE? If an object moves in a circle at a constant speed, its velocity vector will be constant. Explain your answer.
A hockey puck moving at 28 m/s is caught by an 80,00 kg man who was at
rest. The man and puck move together after the collision. The pucks mass is
0.16 kg. What is the final velocity?
A. 0.06 m/s
B. 4.5 m/s
C. 1.36 m/s
D. 8 m/s
Answer:
A
Explanation:
all the work is in the attached file :D
Two sounds are played for you. The first has a frequency of 196 Hz. The second has a frequency of 392 Hz. Which sound will be "higher" to your ear?
A) The First
B) The Second
C) They will sound the same
Answer:
The second one, the higher the hertz the higher the frequency we hear
Explanation:
HELP ASAP
this is for science, and if i get the questions right, I pass, but the teacher never taught us the lesson, idrk y. so i really need help:( Im giving away 20 points so please give me your best answers ;)
1. As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based on the Law of Gravity which of the following statement is true?
a. mass remains the same and the gravitational pull from Earth decreases
b. weight remains the same and the gravitational pull from Earth changes
c. weight increases and the gravitational pull from Earth stays the same
d. mass decreases and the gravitational pull from Earth increases
2. A satellite is sent into orbit around the Earth, In which of the following situation would the gravitational force be the greatest?
A. 1200 lb satellite orbiting 150 miles above Earth’s surface
b. 850 lb satellite orbiting 150 miles above Earth’s surface
c. 850 lb satellite orbiting 1500 miles above Earth’s surface
d. 1200 lb satellite orbiting 1500 miles above Earth’s surface
3. High and low tides are the regular pattern of rising and sinking ocean-water levels. They are caused when the sun’s gravity and the moon’s gravity pull on ocean water. The moon’s gravity has a greater effect on Earth’s oceans than the sun’s gravity. Why would the moon have a greater effect than the sun?
a. The moon has less mass than the sun.
b. The moon is closer to Earth than the sun.
c. The moon is not as hot as the sun.
d. The moon has less mass than Earth.
4. Which statement about the universality of gravity is false?
a. The gravitational force between two objects depends only on their masses.
b. Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are.
c. The gravitational force between two objects increases if the objects move closer together.
d. The gravitational force between two objects increases if mass is added to one object.
Answer:
1)a- mass never changes as you move from the earth
2)actually am not sure I haven't been taught that too
3)b
4)a-it doesn't depend only on mass but also weight
I need help if you can help me to get 10 points.
Answer:
It allows the reader to feel more connected to her purpose
Explanation:
If Cooper is using personal examples for her argument, she is allowing the reader see more of her point of view, which can also lead them to feel connected to her purpose
A student is conducting a physics experiment and rolls four different-
sized marbles down identical ramps. The marbles have the following
masses:
Marble A: 1.0 gram
Marble B: 1.5 grams
Marble C: 2.0 grams
Marble D: 2.5 grams
Assuming the marbles reach the same speed, which will have the
greatest kinetic energy at the bottom of the ramp?
Answer:
I think the answer is C
Explanation:
Its heavy but not too heavy
If several forces are exerted on a system, calculate the work done by each force, then multiply the results.
Question 4 options:
True
False
Answer:
false, each force might have a different about and a different direction
False because each force might have a different about and a different direction.
What is force?A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The vector sum of all the forces equals the net force. In other words, the net force is the sum of all forces, it is obtained by combining all forces as vectors. The net force is the sum of the force vectors A + B + C for the situation of the three forces on the force board.
Work done due to force is given as,
Work done, W = F.S cosФ
Where F is force a vector quantity, S is displacement and Ф is angle between them.
When forces are exerted in different direction than net force is calculated using vector sum.
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Balance chemical reactions: please help question attached
Based on the table, which isotope is best suited for use as a radioactive tracer for the body’s use of calcium? calcium-40 calcium-45 calcium-47 calcium-49
Answer:
calcium-47
Explanation:
Just did the test. Good Luck!
The isotopes of calcium are artificially produced to use them as a radioactive tracers. Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
What is radioactive tracer?A radioactive tracer consists of a chemical compound in which one or more atoms are replaced by a radioisotope.
Out of the six isotopes of calcium, calcium 47 is the most suitable isotope.
Calcium-47 consists of the half-life of about five days. This duration is long enough for biological investigations.
Thus, Calcium 47 is best suited for use as a radioactive tracers for body's use of calcium.
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Pls help I need this done soon 50 points
Answer:
1,3,5
Explanation:
i think maybe dont come at me
Answer:
it is 1,3,5
Explanation:
Which of the following is a claim of special relativity?
A. All laws of physics apply to frames of reference that are changing
speed.
B. All laws of physics apply to frames of reference that are
accelerating
C. All laws of physics apply to frames of reference that are not
accelerating.
D. All laws of physics apply to frames of reference that start from
rest.
SUSM
