Answer:
An ellipse with the Sun at one of the foci of the ellipse
Explanation:
Planets have elliptical orbits
A man lowers an object of mass 12 kg from a height of 0.5m to the floor. What is the work done by gravity?
Answer:
60Nm
Explanation:
Work done = F * S = 12*10*0.5 = 60Nm
Question 9 of 25
Which feature of a balanced chemical equation demonstrates the law of
conservation of mass?
OA. It has equal numbers of each type of atom in its reactants and
products.
OB. It shows the coefficients and subscripts of each formula shown in
the equation.
OC. It has a reaction arrow between the products and reactants of a
chemical reaction.
OD. It shows the chemical formula for each substance in its reactants
and products.
SUBMIT
A. It has equal numbers of each type of atom in its reactants and products.
a balanced chemical equation = number of elements on both side are equal
True or false the incident angle is the angle formed between the barrier and the direction of wave propagation?
It is true that the incident angle is the angle formed between the barrier and the direction of wave propagation.
What is wave propagation?Wave propagation refer to the processes and different ways waves travels from one medium to another and transferring energy.
Therefore, is true that the incident angle is the angle formed between the barrier and the direction of wave propagation.
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Which formulas show the relationships between momentum, mass, and velocity? check all that apply. p = mv p = mass over volume p = volume over mass m = density over volume p = volume over density v = density over mass v = mass over density
The relationships between momentum, mass, and velocity is that the product of mass and velocity gives the momentum of that object ( kg.m/s ).
P = mv.
What is Momentum?Momentum is simply the product of the mass of an object and its velocity.
Its is expressed as;
P = m × v
Where m is the mass of the object and v is its velocity.
The relationships between momentum, mass, and velocity is that the product of mass and velocity gives the momentum of that object ( kg.m/s ).
P = mv
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Answer:(C)
Explanation:
because is 13 trust me I got it right
Let f(x) = -log(4x) + 5.
What is the average rate of change of f(x) from 3 to 8?
Round your answer to the nearest hundredth.
0-11.74
-0.09
0
0.09
O 11.74
Answer:
0.09
Explanation:
I took the test and the correct answer is actually
-0.09
A neutron star is as dense as Group of answer choices water the nucleus of an atom the center of the Earth our astronomy textbook a white dwarf star
A neutron star is considered as dense as the nucleus of an atom, and it represents a special type of star.
What is a neutron star?A neutron star is a special kind of star generated after the death of a giant star that produces a supernova.
These stars (neutron stars) have a diameter really small, e.g., an area of ten kilometers in diameter.
In conclusion, a neutron star is as dense as the nucleus of an atom, and it represents a special type of star.
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A 30 kg falling object hits the ground at a speed of 11.5 m/s. If the kinetic energy of the object when it hits the ground is equal to the gravitational potential energy it had before it was dropped, at what height was it dropped from?
Answer:
6.74 m
Explanation:
PE = KE
mgh = 1/2 mv^2
30 ( 9.81) h = 1/2 (30)(11.5)^2
h = 6.74 m
archaeologists use radioactive decay of an isotope of the element because it has a fairly short half-life and is found in anything that was once living.
Archaeologists use radioactive decay of an isotope of the element carbon. Because it has a fairly short half-life, and is found in anything that was once living.
What is radioactivity?The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.
Archaeologists use radioactive decay of an isotope of the element carbon. Because it has a fairly short half-life, and is found in anything that was once living.
Hence, carbon is used the correct answer for the blank.
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Answer:
Answer is carbon
Explanation:
EDGE2023
Suppose it turns out that one in 1 million stars has a planet that at some point in its history is home to an advanced civilization. Then the total number of civilizations that have arisen in our galaxy would be closest to _____. Assume there are about 100 billion stars in the Milky Way galaxy.
It has been proposed that the total number of civilizations that have arisen in our galaxy would be closest to 100,000.
What is a galaxy?A galaxy is a group of stars (solar systems), gas, and dust in a specific position in the Universe.
The Milky Way is the galaxy where we live and it has been proposed that this galaxy is full of dead civilizations.
In conclusion, the total number of civilizations that have arisen in our galaxy would be closest to 100,000.
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A meter stick hurtles through space at a speed of 0. 95c relative to you, with its length perpendicular to the direction of motion. You measure its length to be equal to.
Answer:
Explanation:
Caty , Use the relativity formula for length. ( they teach this in H.S. ? ) it's from my Modern Physics in college, A 300 level class
L = [tex]L_{0}[/tex][tex]\sqrt{1-\frac{v^{2} }{c^{2} } }[/tex]
L = 3 [tex]\sqrt{1-\frac{.95^{2} }{1^{2} } }[/tex]
L = 0.9367496998 meters
L = 0.94 meters approx
A crate of mass 90 kg rests on the floor. How much work is required to move the crate at a constant speed 6 m along the floor against a friction force of 180 N?
If the crate is moving at a constant speed, then there is zero net force on the crate, and hence no work is required.
More specifically, by Newton's second law the net horizontal force on the crate is
F - 180 N = 0
where F is the magnitude of the applied force. The right side is zero since constant speed = no acceleration. Then F = 180 N.
Now,
• work done by F = (180 N) (6 m) = 1080 J
• work done by friction = (-180 N) (6 m) = -1080 J
so the total work W is
W = 1080 J - 1080 J = 0 J
Alternatively, by the work-energy theorem, the total work done on the crate is equal to the change in its kinetic energy. But constant speed means initial and final velocities are equal; if v is this speed, then
W = 1/2 (90 kg) v² - 1/2 (90 kg) v² = 0 J
How come on Mercury the day is 58 Earth days. But Mercury is closest to the sun, meaning that the time on Mercury would be faster? It makes no sense...
Answer:Mercury spins slowly on its axis and completes one rotation every 59 Earth days. But when Mercury is moving fastest in its elliptical orbit around the Sun (and it is closest to the Sun), each rotation is not accompanied by sunrise and sunset like it is on most other planets.
Explanation:
A grasshopper jumps at a 65.0° angle at 5.42 m/s. At what time does it reach its maximum height? (Unit = s)
Answer:
Vy = V sin θ = 5.42 m/s * .907 = 4.91 m/s initial vertical speed
Vy = a t = 0 at time it reaches maximum height
t = 4.91 m/s / 9.80 m/s^2 = .501 time to reach maximum height
I NEED THIS ANSWER QUICK!
About how much precipitation in the water cycle occurs over the ocean?
A) 15 percent
B) 50 percent
C) 78 percent
D) 100 percent
Answer:
Hello, I'm here to help you.
↬ 78%
Explanation:
↬ Think that about 70% of the area of the earth is covered by the ocean.
↬ So the precipitation that falls on it is a smiliar percentage.
What is the answer:
in the setup shown, a student pulls a string attached to a block with a force of F, The string applies a force with a magnitude of 21.1N on the block in the upward direction. the block has a weight of 19.6N.
A. 1.5N in the upward direction
B. 40.7N in the upward direction
C. 1.5N in the downward direction
D. 40.7 N in the downward direction
The magnitude and direction of the normal force will be 1.5N in the upward direction. Option A is correct.
What is tension force?The tension force is described as the force transferred through a rope, string, or wire as it is pulled by opposing forces.
The tension force is applied along the whole length of the wire, pulling energy equally on both ends.
The magnitude and direction of the normal force is found as;
[tex]\rm F_{net}=F_1-F_2 \\\\ \rm F_{net}=N\\\\ N=21.1 \ N - 19.6 \ N \\\\ N=1.5 \ N[/tex]
The grater force is in the upward direction. The magnitude and direction of the normal force will be 1.5N in the upward direction.
Hence,option A is correct.
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Answer:
1.5 N in the upward direction.
Explanation:
What type of energy change results when friction slows down an object.
How is area different from volume
Answer:
Area is two dimensional like cm^2 volume is 3 dimensional like cm^3
Explanation:
Answer:
an area is a two dimensional whereas a volume is a three dimensional
Explanation:
An area is a plain figure while a volume is a solid figure.The area is measured in square units and the volume in cubic units.The area covers the outer space and the volume the inner capacity
A wave created by shaking a rope up and down is called a.
A woman suddenly pulls a cart with a box to the right. Explain the motion. (Look at the picture I provide)
The box moves to the left to its resisting change in motion AKA inertia.
What is law of inertia?The law of inertia of Newton's first law of motion states that an object at rest o uniform motion in a straight line will continue in that path unless it is acted upon by an external force and will move in the direction of the applied force.
When the woman applies a force on the cart, the cart will move in the direction of the woman applying the force, while the box will move backward due to resisting change in motion.
Thus, the correct answer is, the box moves to the left to its resisting change in motion AKA inertia.
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what is the kinetic energy of a flying bird of mass 600g flying with velocity of 10m/s
Answer:
30 J
Explanation:
You have to transform g in kg, so 600 g=0,6 kg
the kinetic energy value is
K= ½ mv² so it is K=½ (0.6×100)=30 J
[tex]\text{Kinetic energy,}\\\\~~~~~~E_k = \dfrac 12 mv^2\\\\~~~~~~~~~~=\dfrac 12 \times 6\times 10^{-1} \times 10^2~~~~~~~;[m = 600 g = 600 \times 10^{-3}~ \text{kg} = 6\times 10^{-1}~ \text{kg}]\\\\~~~~~~~~~~=\dfrac{60}2\\\\~~~~~~~~~~= 30~ J[/tex]
An alpha particle (charge 2e) and an electron move in opposite directions from the same point, each with the speed of 2. 80×105 m/s
The total magnetic field of the alpha particle will be = 1.974 x 10⁻⁴ T .
What is magnetic field?
Magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Magnetic field due to moving charge =
[tex]B=\dfrac{\mu_oq}{4\pi}\times \dfrac{v}{r^2}[/tex]
q is charge moving with velocity v and r is distance from point at which field is calculated .
For alpha particle
[tex]B_1=\dfrac{\mu_o}{4\pi}\times \dfrac{2\times 1.6\times 10^{-19]\times 2.8\times 10^{5}}}{(8.25\times 10^{-9})^2}}[/tex]
= 0.1316 x 10⁻³ T
For electron
[tex]B_2=\dfrac{\mu_o}{4\pi}\times \dfrac{1.6\times 10^{-19}\times 2.8\times 10^{5}}{(8.25\times 10^{-9})^2}[/tex]
= .0658 x 10⁻³ T .
Both these magnetic field will be same in direction because direction of equivalent current is same for both the particles .
Hence
Total magnetic field
= B₁ + B₂ = .1974 x 10⁻³
= 1.974 x 10⁻⁴ T .
Hence the total magnetic field of the alpha particle will be = 1.974 x 10⁻⁴ T .
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The basic unit of electric current is the: ohm. ampere. conductivity. volt.
The basic unit of the measure of the rate of current flow in a conductor is ampere.
Option B) ampere is the correct answer.
What is Current?Current is simply the rate of flow of charged particles such as electrons caused by:
EMF or Voltage.An ampere is simply a unit of measure of the rate of current flowing through a conductor.
Ampere is the SI basic unit of electric current
Therefore, the basic unit of the measure of the rate of current flow in a conductor is ampere.
Option B) ampere is the correct answer.
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Answer:
B) ampere
Explanation:
which of these is NOT an example of a lever?
a. shovel
b. pushup
c. ramp
d. seesaw
Answer:
c
Explanation:
Out of the given options, shovel, pushup, and seesaw are all examples of levers. Hence, the one that is not an example is :
rampAn object appears white because it ___. reflects all wavelengths of visible light absorbs all wavelengths of visible light reflects all wavelengths of ultraviolet light absorbs all wavelengths of ultraviolet light
An object appears white because it reflects all wavelengths of visible light . Option A is correct.
What is ultraviolet ray?
Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.
A white item reflects white light in all hues equally. We see the hue that an item does not absorb if it absorbs all except one. Red, orange, green, blue, indigo, and violet light are absorbed by the yellow strip in the diagram.
Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of vitamin C.
An object appears white because it reflects all wavelengths of visible light .
Hence, the correct answer for the blanks is reflects all wavelengths of visible light .
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What type canola oil biome is
Answer:
canola oil biome is a chemically refined oil that is used for cooking and skin
Explanation:
A nonconducting sphere of radius r0 carries a total charge q distributed uniformly throughout its volume
The electric field for the nonconducting sphere of radius r₀ carries a total charge q distributed uniformly throughout its volume will be,[tex]E=kQ\frac{r}{r_0^3}[/tex].
What is an electric field?It is a physical field occupied by a charged particle on another particle in its surrounding.
For a non-conducting sphere, the charge density is;
[tex]\rm \rho = \frac{q}{V} \\\\ \rho = \frac{Q}{\frac{4}{3}\pi r^3 } \\\\ \rho = \frac{3Q}{4 \pi r_0^3} \\\\[/tex]
The electric field is found as;
[tex]\rm E=K \frac{\rho V}{r^2} \\\\ E= k \frac{3Q \times 4 \pi r^3}{4 \pi r_0^3 \times 3r^2} \\\\ E=kQ\frac{r}{r_0^3}[/tex]
Hence, the electric field for the nonconducting sphere of radius r₀ carries a total charge q distributed uniformly throughout its volume will be,[tex]E=kQ\frac{r}{r_0^3}[/tex].
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The effort needed when a simple machine is used is best described by which of these statements?
Answer:
effort effort effort effort effort effort
Is cracking the eggs a physical change or a chemical change and why
Answer:
Cracking of an egg is a physical change since the egg and the stuff inside does not change but the shape or appearance of the shell changes.
Explanation:
Hope it helps
Which one of the following would not be considered an advantage of the corporate form of organization?
The corporate form of organization has a disadvantage of government regulations, which is due to the complicated rules. The correct option is b.
What is a corporate form of organization?The major characteristics of a corporate form of organization are limited liability, shareholder ownership, double taxation, continuing lifespan and professional management.
Among the options, the disadvantage is government regulations.
Thus, the correct option is b.
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If the voltage of a circuit is doubled and the resistance remains unchanged, the current flowing through the circuit will be
If the voltage of a circuit is doubled and the resistance remains unchanged, then current flowing through the circuit: will Increase
Relationship between Current, Voltage and Resistance
The Current of a circuit is directly proportional to the voltage and inversely proportional to the resistance.
The voltage in a circuit is equal to the product of the current and the resistance in the circuit
The resistance in a circuit is directly proportional to the voltage but inversely proportional to the current.
In conclusion, If the voltage of a circuit is doubled and the resistance remains unchanged, then current flowing through the circuit: will Increase
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