Answer:
Colors!
Explanation:
"Visible light waves are the only electromagnetic waves we can see. We see these waves as the colours of the rainbow. Each colour has a different wavelength. Red has the longest wavelength, and violet has the shortest wavelength."
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Ancient Greek history shows that winning at any cost was always the goal of sports.
A.
True
B.
False
PLEASE NO LINKS
Answer:
B.false
Explanation:
wining does not only depends on scoring a goal no
Ancient Greek history shows that winning at any cost was always the goal of sports. the statement is false.
what is goal ?Goal can be defined as something where an individual or a group of individual aim to achieve something, they might make an envision, plan and commit to achieve a desired objective within a finite time by setting deadlines.
goal can be denoted as an anticipated result that motivates a person to direct his/ her effort where the Persistence and patience are two important qualities to achieve one’s goals.
Goals van be specific, close-ended quantifiable objectives with a limited time period or achieving them, it can help to concentrate energy by defining what needs to be done and setting reasonable time limits for it,
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A 4.0 kg dog runs from one end of a 21 kg canoe to the other, a distance of 4.9 m. Assuming negligible water resistance, how far does the canoe move in metres?
The distance traveled by the canoe in the water is 0.93 m.
The given parameters;
mass of the dog, m = 4.0 kgmass of the canoe, = 21 kgdistance traveled by the dog, d = 4.9 mApply the principle of conservation of linear momentum to determine the distance traveled by the canoe;
[tex]m_1v_1 = m_2 v_2\\\\m_1(\frac{d_1}{t} ) = m_2(\frac{d_2}{t} )\\\\4(4.9) = 21(d_2)\\\\d_2 = \frac{4(4.9)}{21} \\\\d_2 = 0.93 \ m[/tex]
Thus, the distance traveled by the canoe in the water is 0.93 m.
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A range of energy that cannot be seen by human eyes but has slightly more energy per photon than visible light is known as _______ radiation.
Answer:
ultraviolet
Explanation:
think of the color with the highest wavelength, then add a prefix
How far has a dolphin traveled in kilometers if it swims for 1.8 h at 5.6 km/h ?
Answer:
distance = 6.26342 miles
Explanation:
what is the scientific name for light bending when it strikes certain objects?
Answer:
refraction!
Explanation:
it's the bending of light. it makes it possible for us us have lenses, magnifying glasses, rainbows and other stuff
When should you not do if you feel pain while exercising
Answer:
you should rest or decrease the activity that is causing the problem, ice the painful area
Explanation:
Hope this helps~!
Answer:
Your question is hard to understand, are you asking what you should do?
Explanation:
If so then the answer is to stop doing the exercise. You want to stop immediately because you can cause damage. You can tear a muscle if you keep pushing yourself if you feel pain. (not to be confused with uncomfortableness).
If an object falls from rest and lands 3.2 seconds later, how many
meters did it fall
Answer:
50.2 meters
Explanation:
When an object falls, it goes a distance d in time t according to the formula:
[tex]d=\frac{1}{2}*g*t^{2}[/tex]
d is the distance in meter, g is the acceleration due to gravity with the value of 9.8[tex]m/s^{2}[/tex] , t is the time in seconds
Therefore, [tex]d = \frac{1}{2}*9.8*(3.2)^{2}[/tex]
d= 50.176 ≈ 50.2m
Force 1: The force which pulls objects towards the surface of a planet.
Force 2: The force which attracts iron nails towards a magnet.
Which statement is true about the forces?
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a contact force. Force 2 describes
magnetic force, which is a contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a non-contact force.
Force 1 describes gravitational force, which is a non-contact force. Force 2 describes
magnetic force, which is a contact force.
Answer: Friction is an important thing in life and we use it to move things or friction is used on us.
Explanation: Friction happens when you rub against something or when someone or something rubs against you.
In addition, you can’t see inside the dummy’s skull, but if you could, what would his brain be doing?
Resistance is equal to the potential difference divided by what?
Answer:
From this, we conclude that; Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR). The important factor here is the temperature.
how much heat energy is needed to raise the temperature of 50g of lead by 4.0°c
Explanation:
h=mcƦ
=50×0.129×4
=25.8j
HELPP EARTH SCIENCE PLS!! And thank you.
Answer:
a
Explanation:
The reader can infer from this passage that Archimedes' screws A. can be used to drill for underground minerals. B. have been replaced by the electric grain elevator. C. were the main reason Rome became a world power. D. can be operated without an electric power source.
Answer: the answer is D operated without an electric power source.
Explanation: got it right on the test!!
Answer: Answer D,
Can be operated without an electric powder source.
Explanation:
I NEED ANSWERS ASAP!!!! Which of the following would accelerate faster with the same amount of force?
150 pound person on a skateboard
200 pound person on a skateboard
They all accelerate equally
300 pound person on a skateboard
150 pound person on a skateboard
The 150-pound person on a skateboard would accelerate faster with the same amount of force. Therefore, option (A) is correct.
What is acceleration?Acceleration of a body is demonstrated as the change of velocity with respect to time. The acceleration is a vector parameter as it carries both magnitude and direction. Acceleration is defined as the 2nd derivative of position w.r.t. time and the 1st derivative of velocity w.r.t. time.
According to Newton's 2nd law, the force is equal to the multiplication of the mass and acceleration of an object.
F = ma
and, a ∝ 1/m
From the above equation, we can say that acceleration (a) is inversely proportional to the mass (m) of the body.
In the given option the person with a mass of 150 pounds will accelerate faster with the same amount of force and the person with a mass of 300 pounds will accelerate the least.
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In the game of shuffleboard, you push plastic disks forward and then release them so that they slide across a level playing surface. Once you release a disk, you are no longer pushing and it gradually skids to a stop. Its final position determines your score. As each disk skids to a stop, what becomes of the kinetic energy it had when you released it
Answer:
I believe it would then become potential energy.
Explanation:
You carry a 20 kg suitcase upstairs, a distance of 4m. How much work did you do?
Please find attached photograph for your answer.
Hope it helps.
Do comment if you have any query
Describe the effects of the unbalanced forces on each of these objects.
- A bicycle is moving in a straight line. There is an unbalanced force
opposite to the direction the bicycle is moving.
- A car is moving in a straight line. There is an unbalanced force in
the same direction as the car is moving.
- A ball is moving in a straight line. There is an unbalanced force
sideways to the direction the ball is moving.
Answer:
The unblanced force will start to pull the bicycle backward
The car will move faster in the direction that it is moveing
The ball will move off course sideways
Explanation:
The force will cause the motion in an object. The effects of the unbalanced forces on each of these objects can be,
A bicycle will move backward.A car will move in the same direction.A ball will have sideways due to unbalanced force.What is Unbalanced Force?Unbalanced force is defined as the forces which are not equal in magnitude. When two forces with different magnitudes are applied on an object from opposite directions, the object will start moving in the direction of the net force.
These forces result in the motion of an object.
Balanced forces are the forces which are equal in magnitude. When two forces with equal magnitude are applied on an object from opposite directions, the object will not start moving.
These forces does not result in the motion of an object.
Hence, this force will cause the motion in an object.
The effects of the unbalanced forces on each of these objects can be,
A bicycle is moving in a straight line. There is an unbalanced force in the opposite direction and the bicycle will move backward.A car is moving in a straight line. There is an unbalanced force in the same direction as the car is moving in the same direction.A ball is moving in a straight line. There is an unbalanced force sideways to the direction the ball is also moving in sideways.Learn more about Unbalanced force,
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What causes an electric charge?
Question 1 options:
The movement of electrons due to a difference in electric potential energy
The movement of protons due to a difference in electric potential energy
The movement of neutrons due to a waterfall
The movement of electrons due to kinetic energy
Answer: The movement of electrons due to kinetic energy
Explanation: best one i could see not 100% tho
Answer: The correct answer is A.
Explanation: Reason being is that if you look it up it'll explain that it is the movement of electrons being removed or added.
Also, I know this is truly correct because I've taken the test myself.
Please ignore the other persons answer because they are incorrect.
I hope this helps!! :D
how much energy is needed to raise the temperature of 2kg of copper from 0°c to 10°c. the specific heat capacity of copper is 380j/kg°c
Explanation:
H= mass× specific heat capacity×change in temperature
=2×380×(10-0)
=2×380×10
=7600Joules
According to the specific heat capacity, 7600 joules of energy is required to raise temperature of 2 kg copper from 0-10 degree Celsius.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
In the given problem,energy is calculated as, Q=2×380×(10-0)=7600 J.
Thus, 7600 joules of energy is required to raise the temperature of 2 kg of copper from 0°C to 10°C.
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Why does lowering the temperature of an object increase its density
Answer: Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
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Why are comets ice bodies?
A. They originate in areas beyond Neptune.
B. They orbit the sun between Mars and Jupiter.
C. They lose heat as they fall through Earth's atmosphere.
D. They cluster in streams.
Answer:
The answer is C
Explanation:
the answer is C
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It is common to struggle to maintain a fitness regime.
A.
True
B.
False
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Answer:
A.true
we struggle to maintain a fitness regime
easy one giving brainly if correct
Answer:
c) Liquid
Explanation:
Liquid takes the shape of its container and has a specific volume. On the other hand, solid and gas don't.
In each cylinder, draw the piston and the gas particles based on the temperature shown.
What is the cost of operating a 40 W light bulb for a year, if the cost of electricity is $0.10 per kWh
Answer:
$480 a year
Explanation:
If Marin walks 28 m north and 19 m east, what is the magnitude of her displacement from the starting point?
Answer:
I guess 266
Explanation:
28*19=532
532/2=266
You travel 20 miles east in 2
hours. What is your velocity?
Answer:
10 mph
Explanation:
it just common sense
Answer with full steps please!
Answer:
B
Explanation:
Because B/5
if i'm wrong sorry but i hope it's help^^
An arrow is launched from a bow with an initial horizontal velocity of 40
m/s and an initial vertical velocity of 62 m/s. What is the total initial vector
velocity of the arrow?
Answer:
V = (Vx^2 + Vy^2)^1/2 = (40^2 + 62^2)^1/2
V = 73.8 m/s
tan theta = Vy / Vx = 62/40 = 1.55
theta = 57.2 deg
Help help help please help
hii
Explanation:
question: 1 Answer: the second answer
question: what is one importance of sea ice ? answer: "reflecting sunlight back into space, regulating ocean and air temperature, circulating ocean water, and maintaining animal habitats." so either 1 or 3
question: 2 Answer: Species become endangered for two main reasons: loss of habitat and loss of genetic.
