Answer:
The minimum amount should be 30 minutes three times a week.
Explanation:
Someone please help me!!! Please explain and I will mark brainliest!!!
R=10+15+30
55 is the answer to the question
Write two characteristics of an educated society
Answer:
Different and better?
Explanation:
i dont think that helps lol
An educated person has the ability to think clearly and independently and has good judgement.
What is Education?Education is defined as purposeful activity directed towards achieving some objective, such as the dissemination of knowledge or the promotion of skills and character traits, whose aims include the development of understanding, rationality, kindness and honesty.
There are three main types of education which are as follows:
Formal, Informal and Non-formal.
The specialty of education is that it is pre-determined and pre-planned. It is regular and spatial i.e. time bound and regulated by the institutional. Proper education improves people's understanding of the world around them which make them less susceptible to the influence of others
Thus, an educated person has the ability to think clearly and independently and has good judgement.
Learn more about Education, here:
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When does the ball have the greatest and least amount of potential energy?
Answer:
A ball thrown into the air has the most potential energy when it has reached the highest point above the ground before it begins descending. If we consider the vertical motion only beginning when the ball leaves the thrower’s hand, the ball is exchanging kinetic energy for (gravitational) potential energy. When all of the kinetic energy has been transformed, the ball begins falling, and exchanges it’s potential energy back into kinetic energy. If you ignore air resistance, the ball will land with as much energy as it began with.
10 A ship is made of 4000 m' steel of density
7900 kgm^3
a. What volume of fresh water
1000 kg m) would the ship need to
displace in order for it to float?
b. Explain how the design of the ship enables
it to displace this much water.
Answer:
Explanation:
mass of ship = volume x density
= 4000 x 7900 = 316 x 10⁵ kg
The ship must displace water equal to weight of ship that is 316 x 10⁵ kg .
If volume of displaced water be V .
V x 10³ is mass of displaced water
V x 10³ = 316 x 10⁵
V = 31600 m³.
b ) Now the volume of steel making ship is only 4000 m³ so if it is in the form of a lump , it will displace only water equal to its volume ie 4000 m³ . So in order that it may displace water equal to volume 31600 m³ , it must be given shape so that it is hollow .
Why is oxygen more chemically reactive than nitrogen?
Answer:
O2 has two more electrons compared to N2, with extra 2 electrons in the higher energy anti-bonding orbitals known as Diradical. These electrons have higher energy and are unpaired; therefore, O2 is more reactive
Explanation:
Answer:
O B. Oxygen needs to gain only 2 electrons to have a full octet, while nitrogen needs to gain 3.
Explanation:
5 kg dog accelerates at a rate of 3 m/s2. What is the net force acting on the dog?
A. 2 N
B. 15 N
C. 8 N
D. 1.5 N
Answer:
The answer would be C. 8 N
Explanation:
What is the Kinetic Energy of a 120 kg object that is moving with a velocity of 15 m/s
Answer:
Kinetic Energy:120 x 15=1800
Explanation:
Answer:
13500J
Explanation:
Kinetic energy = (1/2×120)kg × (15m/s)^2
KE = 60kg × 225 (m/s)^2 = 13500J
6. Compare Which of the
following can carry the
most current?
a. 9-V battery
b. 220-V electrical outlet
c. 12-V battery
d. 110-V electrical outlet
A student used three appliances in her dormitory room: a 1,200-watt iron, which she uses 3.5 hours per month: a lamp with a 100-watt bulb she uses 125 hours per month; and a 700-watt coffee maker, which she uses 15 hours month hours per month
Lowest form of energy from the sun
UVA
I'm pretty sure it's UVA :)
what is CHA-CHA-CHA.
Answer:
The cha-cha-cha, is a dance of Cuban origin. It is danced to the music of the same name introduced by Cuban composer and violinist Enrique Jorrin in the early 1950s. This rhythm was developed from the danzón-mambo
one the energy level diagram what is represented by the letter
a
b
c
Answer:
see below
Explanation:
B is the activation energy
A is the enthalpy change which is negative
C is the product of oxygen and ethanol which is carbon dioxide and water
hope this helps, please mark
can you give me an example about radiation
Explanation:
A burning candle emits radiation in the form of heat and light. The Sun emits radiation in the form of light, heat, and particles.
Answer: The energy from the sun is one great example of radiation. The sun emits light in a broad range of wavelengths which all contain energy. These waves are also discussed in the climate section for energy balance. The waves are emitted from the sun and travel through space and hit the earth and other planets.
EXTRA EXAMPLES: heat from a stove burner.
visible light from a candle.
x-rays from an x-ray machine.
alpha particles emitted from the radioactive decay of uranium.
sound waves from your stereo.
microwaves from a microwave oven.
electromagnetic radiation from your cell phone.
Based on Nia's notes, what would be the BEST way to investigate the heat transfer based on the movement of the molecules?
Answer: Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.
Explanation:
Answer:
Nia could measure the temperature of the bottom floor of a house to see if the heat had risen in the house due to convection.
Explanation:
Because energy transferred by the mass motion of molecules.
*Urgent*
(Part 1)
A merry-go-round rotates at the rate of 0.4 rev/s with an 99 kg man standing at a point 2.5 m from the axis of rotation. What is the new angular speed when the man walks to a point 1 m from the center? Consider the merry-go-round is a solid 73 kg cylinder of radius of 2.5 m. Answer in units of rad/s.
(Part 2)
What is the change in kinetic energy due to this movement? Answer in units of J.
Answer:
6.5 rad/s
11.695 kJ
Explanation:
Using the principle of conservation of momentum, we have
L1 = L2 and
I1w1 = I2w2, with I being the moment of inertia and w being the angular velocity.
w1 = 0.4 rev/s = 0.4 * 2π = 2.51 rad/s
Moment of Inertia, I = ½MR² + mr²
I1 = ½ * 73 * 2.5² +99 * 2.5²
I1 = 73 * 3.125 + 99 * 6.25
I1 = 228.125 + 618.75
I1 = 846.875 kgm²
The man has been said to have walked 1 m away from his position, so then
I2 = ½ * 73 * 2.5² + 99 * 1²
I2 = 228.125 + 99
I2 = 327.125 kgm²
From the formula stated above,
w2 = I1w1 / I2
w2 = (846.875 * 2.51) / 327.125
w2 = 2125.65725 / 327.125 rad/s
w2 = 6.5 rad/s
2
K = Iw²
K = 846.875 * 2.51²
K = 2125.65725 J
K'= Iw²
K' = 327.125 * 6.5²
K' = 13821.03125 J
Change in energy is given as, K' - K, so that
Energy, E = 13821.03125 - 2125.65725
Energy, E = 11.695 kJ
What do you understand if the frequency of a sound is 70 Hz?
Answer:
see below
Explanation:
frequency of a wave is the number of complete waves produced per second
so 70 Hz
means, that 70 complete waves are produced in one second,
hope this helps
which of the following has the most energy
the answer is blue light
Why is it safer to collide with a soft cushion than a hard surface?
Answer:
Impulse is force multiplied by time; and together, the product must be 1 unit. A collision with soft ground will result in the 1 unit of impulse by a larger time and a smaller force (compared to the small time and a large force for the hard floor).
What is the energy transformation of home gas?
Answer:
The Sun transforms nuclear energy into heat and light energy.
Our bodies convert chemical energy in our food into mechanical energy for us to move.
An electric fan transforms electrical energy into kinetic energy.
Being overweight or obese increases the risk of:
A. Diabetes
B. Heart disease
C. Stroke
D. All of the above.
theanswer is b.heart disease
Newton’s first law of motion states that an object's motion remains the same unless a force acts upon it. What would be an example of this law in action?
Answer:
A driver breaks suddenly and the passengers are flung forward
24 How long does it take for the Earth to orbit the Sun?
A one day
B one week
C one month
D one year
Answer:
365 days
So The Final Answer is a Year
D is the answer
Explanation:
Answer:
C one month
Explanation:
Look at the diagram below. Which wave effect is being shown?
Enter your answer
Answer:
Where is the diagram????
Answer:
reflection
Explanation:
pleaseeeeeeeeee helpppppppppppppppp
Which of the following would have the most momentum?
A.
A light ball moving slowly
B.
A heavy ball moving slowly
C.
A light ball moving quickly
D.
A heavy ball moving quickly
A heavy ball moving quickly will have the most momentum
The right option is D. A heavy ball moving quickly.
What is momentum?
This can be defined as the product of the mass of a body and its velocity.
The S.I unit of momentum is kgm/s.
The formula of momentum is
M = mv.............. Equation 1Where:
M = Momentum of the ballm = mass of the ballv = velocity of the ball.From the formula above, it can be seen that momentum is directly proportional to
The mass of the ballThe velocity of the ball.Therefore, A heavy ball moving quickly will have the most momentum
Hence, the right option is D. A heavy ball moving quickly.
Learn more about momentum here: https://brainly.com/question/7973509
A 20 kg cart moving at 4 m/s has how much momentum?
40 kg*m/s
40 kg*m/s
5 kg*m/s
5 kg*m/s
80 kg*m/s
Answer:
We conclude that the required momentum is 80 kgm/s.
Explanation:
Given
Mass m = 20 kgVelocity v = 4 m/sTo determine
The momentum p = ?
Important Tip:
The momentum of an object is the product of mass and velocity.We can determine the momentum using the formula
[tex]p = mv[/tex]
where
p is the momentumm is the massv is the velocitynow substituting m = 20 and v = 4 using the equation
[tex]p = mv[/tex]
[tex]p = (20) (4)[/tex]
[tex]p = 80[/tex] kg m/s
Therefore, we conclude that the required momentum is 80 kgm/s.
The momentum of the moving cart is 80kgm/s.
HOW TO CALCULATE MOMENTUM:
The momentum of a body can be calculated by multiplying the mass of that body by its velocity. That is;Momentum (p) = mass (m) × velocity (v)
According to this question, a 20kg cart moving at 4 m/s will have a momentum as follows:Momentum (p) = 20kg × 4m/s
Momentum (p) = 80kg*m/s.
Therefore, the momentum of the moving cart is 80kgm/s.Learn more at: https://brainly.com/question/17173143?referrer=searchResults
How much voltage would it take to push 0.5 amps through a 2 kilowatt toaster?
1000 Volts
2000 Volts
3000 Volts
4000 Volts
5000 Volts
6000 Volts
Given :
Current, I = 0.5 A.
Power of toaster, P = 2 kW = 2000 W.
To Find :
How much voltage is required.
Solution :
We know, voltage is given by :
[tex]V = \dfrac{P}{I}\\\\V = \dfrac{2000\ W}{0.5 A}\\\\V = 4000 \ volts[/tex]
Therefore, 4000 Volts are required.
Answer:
4000
Explanation:
2000/0.5=4000
RE (8
10 ms
1. What is the length of the liquid column in a barometer tube that would support an atmospheric pressure of
10,200 Nm2 if the density of the liquid is 2,600 kgm
what are the methods of avoiding demagnetization
[tex] \\ [/tex]
The best method to use in prevention of self-demagnetization of a permanent magnet is by use of a keeper. Keepers were also commonly known as amateurs. They help in storing magnets safely, especially those that have low coercivity ( magnets that are extremely susceptible to stray fields).
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Hope It Helps!
What the energy transformation of an solar panel?
Answer:
The light energy from the sun causes the particles of the object to vibrate, transforming the light energy into heat energy. The heat energy is then radiated out as infrared light.
Explanation: