Physics High School
Answers
Answer 1
Answer: When the concentration of nanosilver particles in water is increased, the population of Daphnia magna will decrease
Explanation:
The statement below that is the most likely testable hypothesis based on the information provided is that when there is an increase in the concentration of nanosilver particles in water, the population of Daphnia magna will decrease.
Since we are informed that the particles may decrease survival in many aquatic organisms, it simply means that an increase in the particles in water will bring about the decrease in the Daphnia magna, which is the tiny freshwater crustacean.
Related Questions
A wave transports what
from one place to another.
A friction
OB. atoms
O C. energy
OD, amplitude
Answers
it’s C. energy shdjqhkdajkdjqod
What modern method of study can trace evolution airy relatedness of organisms by comparing the nucleotide sequences on DNA
Answers
Answer:
Cross-Species Sequence Comparisons
Explanation:
Cross-Species Sequence Comparisons can help in comparing the nucleotide sequences on DNA
In this comparative study, based on the different evolutionary distances, genomic sequences of species within the evolutionary tree can be determined. The coding and non coding sequences can be determined based on which it can be assessed that which are the unique gene sequences for a given species.
PLS HELP:)
If the incident angle of a light ray is 30 degrees to the normal, what will the reflected angle be?
Answers
The incident ray will have an angle of reflection of 30 degrees (made with a surface normal to the mirror surface). The reflected ray will make an angle of 60 degrees (90 - 30 degrees) with the mirror surface.
A 12 kg
mass is lifted to a height of 2 m. What is its potential energy
at this position?
Answers
Answer:
Explanation:
Potential energy is the energy stored within an object, due to the object's position, arrangement or state
Answer:
240joules
Explanation:
P:E = MGH
mass 12kg
g is constant as 10m/s²
h is 2m
therefore, 12*10*2 =240joules
When entering an expressway, in the acceleration lane you should: A search for a gap in traffic and adjust your speed to the speed of the traffic. B set the cruise control for highway speed. C make a complete stop and check traffic for a suitable gap. D get as close to the vehicle ahead as possible so you can merge into the same gap.
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Answer:A
Explanation: search for a gap in traffic and adjust your speed to the speed of the traffic.
which feature of a balanced chemical equation demonstrates the law of conservation of mass?
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A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow
help me pls its for my science class i need to show my work
Answers
Answer:
P = 5880 J
Explanation:
Given that,
The mass of the block, m = 30 kg
The block is sitting at a height of 20 m.
The block will have gravitational potential energy. The formula for gravitational potential energy is given by :
[tex]P=mgh\\\\=30\times 9.8\times 20\\\\=5880\ J[/tex]
So, the required potential energy is equal to 5880 J.
2 mi. ki khni
mene to bhot sari khni likhi he socha ek aap ke liye
Answers
Answer:
yah kaya ha pagal ............^,^
can someone help me with this??
Answers
Answer:
C
Explanation:
Have a nice day :)
.A person pushes a heavy cabinet across a level wooden floor. Force X is the force required to start the
cabinet moving. Force Y is the force required to maintain a slow, steady forward motion.
Which of the following statements describes the two forces, X and Y?
O
A. Force X is added to force Y
B. Force X is less than force Y
C. Force X is unrelated to force Y
O
D. Force X is greater than force Y
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Answer:
A because both force are required to move the cabinet . force x to make sure the movement also force y to make sure it moves in directed motion
Which object is NOT a form of chemical energy?
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Answer:
Temperature is the degree or intensity of heat present in a substance or object. Thus temperature is not a form of energy.
Explanation:
Answer:
Temperature
Explanation:
If a 50 kg person is running at a rate of 2 m/s, the person’s momentum is
_____________ kg • m/s.
Answers
Momentum is the product of the mass in kg by the velocity in meters per second
50kg*2m/s
= 100kgm/s is his momentum
8. What is the total mechanical energy of a penny dropped off of the top of the Empire
State Building if it has a potential energy of 47 J, and a kinetic energy of 23 J?
A.18J
B.24 J
C.70 J
D.667 J
Answers
Answer:
C 70 Joules because all of the energy of converted to potential energy.
A bullet with a mass of 0.040 kg collides inelastically with a wooden block of mass 1.5 kg, initially at rest. After the collision, the bullet along with the block has a speed of 1.0 m/s. Calculate the initial speed of the bullet.
Answers
Answer:12.43 m/s
Explanation:
Match the following. Match the items in the left column to the items in the right column.
1. March 21
7
North Pole
2. Arctic
vernal equinox
3. December 21
longitude
4. meridians
lowest point on earth
5. September 23
latitude
6. Greenwich, England
South Pole
7. Antarctic
winter solstice
8. Marianas Trench
autumnal equinox
9. parallels
Prime Meridian
10. International Date Line
180th meridian
Answers
Answer:
March 21 = Vernal Equinox
Artic = North Pole
December 21 = Winter Solstice
Meridians = Longitude
September 23 = Autumnal Equinox
Greenwich, England = Prime Meridian
Antarctic = South Pole
Marianas Trench = Lowest point on earth
Parallels = Latitude
International Date Line = 180th Meridian
Explanation:
Una persona puede oír sonidos cuyas longitudes de onda están comprendidas entre 17 m y 0,017 m. Si se considera que la velocidad del sonido es de 340 m/s, las frecuencias de los sonidos que oye, se encuentran entre:
Answers
If you put it in English I’ll answer it for you
two charges create 8.00 N of electric force on each other. if you increase their distance to twice its original value, how much electric force do they exert on each other
Answers
Answer:
2.00 (right on acellus)
Explanation:
doubling the distance between two charges makes F (8.00) quarter, so you would just do 8.00*1/4
Deonte’s family sees a solar panel display and considers using solar power for their home. Deonte knows that solar energy is a natural energy resource.
His family currently uses city electricity, and their power comes from a coal burning power plant. What problems come from using fossil fuels? Choose the two that apply.
A. burns very hot
B. nonrenewable
C. contributes to greenhouse effect
D. expensive
Answers
The answer is b I think
Which of the following actions may help to prevent a rear-end collision?
rolling forward if there is room
pumping the brake to make the brake lights flash
rolling forward if the front zone is clear
all of the above
Answers
Rolling forwards if zone is clear
What is represented on the picture?
O Reflection
O Diffraction
Refraction
Induction
Answers
induction hahahahahahahahahaha
I NEED THIS DONE ASAP I WILL MARK YOU THE BRAINLIEST BUT NO LINKS
Put the correct terms with the correct pictures
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Answer:
1. Static Friction
2. Sliding friction
3. Fluid friction
4. is rolling friction
Sorry if i am wrong
Explanation:
what are the steps to form a igneous rock
Answers
Answer:
igneous rocksare formed through the cooling and solidification ofmagmaor lava. As hot, moltenrockrises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize.
1pt If an object is moving at a constant velocity, it means that....
A. no net force is acting on it
B. a constant force is acting on it in the direction of its motion
c. a constant force is acting on it in the opposite direction of its motion
D. several forces are acting on it, but one force is greater than the others
Answers
Answer:
thecool me
Explanation:
A 0.1 kg mass is connected to a spring with a spring constant of 100 N/m. The spring is
stretched a displacement of 0.2 meters and released. What is the total energy in this system?*
(1 Point)
2.0)
4.0J
10.0)
20.03
Answers
Answer:
[tex]2.0\:\mathrm{J}[/tex]
Explanation:
The elastic potential energy of a spring is given by:
[tex]U_s=\frac{1}{2}kx^2[/tex], where [tex]k[/tex] is the spring constant and [tex]x[/tex] is the displacement from equilibrium.
Solving for [tex]U_s[/tex], we get:
[tex]U_s=\frac{1}{2}\cdot 100\cdot 0.2^2,\\U_s=\boxed{2.0\:\mathrm{J}}[/tex]
A 3.0-kilogram steel block is at rest on a frictionless, horizontal surface. A 1.0-kilogram lump of clay is propelled horizontally at 6.0 meters per second toward the block, as shown in the diagram below.
Answers
Answer:
1.5 m/s
Explanation:
Upon collision, the clay and steel block stick together and move to the right with a speed of 1.5m/s.
What is conservation of momentum principle?
When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For inelastic collision, final velocity is the common velocity for both the bodies.
m₁u₁ +m₂u₂ =(m₁ +m₂) v
Substitute the values for m₁ = 3kg, m₂ =1kg, u₁ =0 and u₂ =6 m/s, then the final velocity will be
3x0 +1x6 = (3+1)v
v = 1.5 m/s
Thus, the clay and steel both have final velocity is 1.5 m/s.
Learn more about conservation of momentum principle
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a 20 A fuse is connected in series with a circuit containing a 240 V source. What is the minimum resistance required to prevent the fuse from melting
Answers
Answer:
12 ohms
Explanation:
you just divide 240 and 20
240 V/ 20 A = 12 ohms
9. What would be an objects weight on Jupiter, if acceleration due to
gravity on Jupiter is 24.5 m/s/s and the object's mass is 5 kg.
Answers
Answer:
Fj / Fe = 24.5 / 9.8 acceleration on Jupiter / acceleration on Earth
Fj / Fe = 2.5
Fj / Fe = 2.5 force on Jupiter = 2.5 that on Earth
W = F = M a
W Jupiter) = 5 kg * 9.8 m/s^2 * 2.5 = 122.5 N
or more simply
F = M a = 5 kg * 24.5 m/s^2 = 2=122.5 N
A set of charged plates have an
area of 8.22*10^-4 m^2 and
separation 2.42*10^-5 m. The
plates are charged with
5.24*10^-8 C. What is the
potential difference V between
the plates?
(Unit = V)
pls hurry <3
Answers
Answer:
175
Explanation:
its for Acellus
The potential difference is V=1.743*10^-7
The voltage is generally referred to as the electric potential difference and it can be measured using a voltmeter. The electrical potential difference between the two plates is expressed as q=CV.
CALCULATION
we know,
q=CV
q={EA/d}*V
here q= 5.24*10^-8C
A=8.22*10^-5m^2
d=2.42*10^-8m
therefore , C={( 8.85*10^-12)*(8.22*10^-5)}/(2.42*10^-8)
C=3.006*10^-1
q=CV
q/C=V
V=1.743*10^-7
refer https://brainly.com/question/26733095
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If two vectors are 7 cm and 5 cm .then what's the addition of these two?
Answers
Answer:
7 + 5 = 12
7 + 5 = 12
Explanation:
Since it asks for 2 vectors, you have to add 2 times.
A beam of light from a laser pen passed through the air and then through a glass plate. Which diagram accurately models this phenomenon? Use evidence and scientific reasoning to defend your claim.
Answers
Explanation:
the second diagram depicts the phenomenon which is refraction and this stems from light moving from a medium to another......and in this case light moves from a less dense medium to a denser medium hence is refracted away from the normal(the straight line between the medium of air and glass)
PLS GIVE BRAINLY
Diagram B shows the refraction event and this is from light to medium, in this case, the light travels from a slightly narrower area to a compact area and is, therefore, further away from the normal (vertical line between the air and glass).
When a ray of light travels from a central location?
When a ray of light travels from a dense area to a rare place, it bends away from normal.
How do you calculate the refractive index?
Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.
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