Answer:
d the moment the ball is the highest in the air
Explanation:
for a, b, and c the ball is in movement which is kinetic energy. also the higher you are the more potential energy you will have.
Un tubo cilindrico hueco de cobre mide 3 m de longitud tienen un diametro exterior de 4cm y un diametro interior de 2 cm¿cuanto pesa?
Answer:
W = 9.93 10² N
Explanation:
To solve this exercise we must use the concept of density
ρ = m / V
the tabulated density of copper is rho = 8966 kg / m³
let's find the volume of the cylindrical tube
V = A L
V = π (R_ext ² - R_int ²) L
let's calculate
V = π (4² - 2²) 10⁻⁴ 3
V = 1.13 10⁻² m³
m = ρ V
m = 8966 1.13 10⁻²
m = 1.01 10² kg
the weight of the tube
W = mg
W = 1.01 10² 9.8
W = 9.93 10² N
In a nuclear power plant, uranium atoms ______
A. Combine and give off heat energy
B. Split and give of heat energy
C. Burn and give of heat energy
D. Split and give off electrons
Answer:
All nuclear power plants use nuclear fission, and most nuclear power plants use uranium atoms. During nuclear fission, a neutron collides with a uranium atom and splits it, releasing a large amount of energy in the form of heat and radiation. More neutrons are also released when a uranium atom splits.
Where, When, What occured in Australian Wildfires?
1. Where?
2. When?
3. What ?
On 11 November a fire started in the Ravensbourne area near Toowoomba, which burnt through over 20,000 hectares (49,000 acres) of bush across several days, destroying six houses.
A 12 kg
mass is lifted to a height of 2 m. What is its potential energy
at this position?
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
The flooding of the Mississippi River
A) is always going to produce negative effects
B) deposits fertile soil in the Mississippi Delta.
C) deposits fertile soil in the western part of the state.
D) is responsible for the formation of the Mississippi Delta.
Hint: Rivers are agents of erision.
If two proton approach each other with speed of 400m\s and 450m\s respectively what is the total momentum of the two particle system
Answer: [tex]83.65\times 10^{-27}\ kg.m/s[/tex]
Explanation:
Given
The velocities of the protons are 400 m/s and 450 m/s
Mass of the Proton is [tex]m=1.673\times 10^{-27}\ kg[/tex]
Since they travel in the opposite direction, therefore, their momentum cancels out each other.
Momentum is the product of mass and velocity
[tex]\therefore m(450-400)\\\Rightarrow 1.673\times 10^{-27}\times 50\\\Rightarrow 83.65\times 10^{-27}\ kg.m/s[/tex]
The direction of momentum is in the direction of proton having 450 m/s velocity.
What is one problem that you think needs to be solved so that your future is safer for your children?
Answer:
Systemic racism
Explanation:
Two parallel plates of area 7.34 x 10^-4 m^2 have 5.83 x 10^-8 C of charge placed on them. A 6.62 x 10^-6 C charge q1 is placed between the plates. What is the magnitude of the electric force on q1? Hint: How is force related to the field? (Unit = N)
Answer:
* if the two plates have the same charge sign F_net = 0
*if one plate is positive and the other is negative F_net = 59.4 N
Explanation:
The electric field created by a parallel plate is
E = [tex]\frac { \sigma }{2 \epsilon_o }[/tex]
where sigma is the charge density
σ = Q / A
we substitute
E = [tex]\frac{Q}{A \ 2 \epsilon_o }[/tex]
E = [tex]\frac{ 5.83 \ 10^{-8} }{7.34 \ 10^{-4}\ 2 \ 8.5 \ 10^{-12} }[/tex]
E = 4.487 10⁶ N / C
the electric force is
F = E / q
in this force it is a vector, so if the charges are of the same sign they repel and if they are of the opposite sign they attract. In this case, the test load is between the two plates that have the same load sign, so the forces are in the opposite direction.
* if the two plates have the same charge sign
F_net = F₁ - F₂
F_net = q (E₁ -E₂)
since the electric field does not depend on the distance
E₁ = E₂
in consecuense
F_net = 0
In a more interesting case
*if one plate is positive and the other is negative
F_net = F₁ + F₂
F_net = q (E₁ + E₂) = 2 q E₁
F_net = 2 6.62 10⁻⁶ 4.487 10⁶
F_net = 59.4 N
net force goes from positive to negative plate
Answer:
59.4 N
Explanation:
acellus
Which factor increases as a result of increasing altitude?
An increase in population growth __________ the need for natural resources for survival.
A. increases
B. decreases
C. prevents
D. has no effect on
Answer:
A. increases
Explanation:
with more mouths to feed, you need more food, but when your food doesn't increase with your population, then there is a food shortage.
verdadero o falso de La energía interna es la energía térmica asociada al objeto en virtud del movimiento de sus moléculas.
Necesito ayuda, porfa.
Answer:
Es la energía cinética interna total de un objeto debido al movimiento aleatorio de sus ... a es la energía que posee un objeto o cuerpo en virtud del movimiento de sus ... Si el movimiento de estas moléculas y átomos es más rápido, se dice que el ... Por lo tanto, la energía térmica asociada con la conducción resulta de la .
Explanation:
A wave is moving at 300m/s and has a frequency of 25Hz, what is the wavelength?
Answer:
12 metre
Explanation:
Wavelength = Velocity / Frequency
Wavelength = 300m/s / 25 Hz
Wavelength = 12 metre
Friction always acts
in the same direction as motion.
in the opposite direction as motion.
at a 30 degree angle to the direction of motion.
perpendicular to the direction of motion.
Explanation:
friction always acts in the opposite direction as motion.
stay safe healthy and happy...A stun gun or TASER is designed to put out a few seconds worth of electric pulses that impress a
voltage of about 1200 V across the human body. This results in an average current of approximately 3
mA into a human body. Using these figures, estimate the resistance of the human body.
Answer:
Resistance = 400000 Ohms
Explanation:
Given the following data;
Voltage = 1200 V
Current = 3 mA = 3/1000 = 0.003 A
To find the resistance;
Voltage = current * resistance
Resistance = 1200/0.003
Resistance = 400000 Ohms
explain how to find the surface area of a rectangular pyramid
...................
Answer:
So let's first start with the base which is a rectangle remember that the formula to solve the area
Explanation:
An event in when a large percentage of all species become extinct is calle
A. biodiversity shift
B. evolutionary shift
C. mass extinction
D. background extinction
Which is a benefit of a scientific model?
A.) It provides a complete image of the concept it is modeling.
B.) It provides an accurate scale of the concept it is modeling.
C.) It provides an accurate visual representation of the texture and coloring of the concept it is modeling.
D.) It provides a useful understanding of the concept it is modeling.
Explain what cardiovascular exercise is in your own words. Explain the benefits of it and how it is different than muscular strength. Give 3 examples of cardiovascular exercises/activities
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
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
Which type of wave is a combination of two waves?
Answer:
A composite wave
Answer:
surface waves
Explanation:
what is the energy of an electromagnetic wave that has a frequency of 5.0 x 10⁵ Hz?
Answer: 3.3 x 10^-28 J
Explanation: just answered on a quiz!! :)
Which use of iron is due to its chemical properties?
Write three things you already know about golf, three things you want to know, and three things you learned
Answer:
What I know, want to know, and have learned
Explanation:
I know
1. You have to have a golf ball
2. You have to have a golf club
3. Its nice to have a golf cart
Want to know:
1. Where can I play
2. How to play
3. Is it a common sport
Have learned:
1. Golf is hard
2. Top golf is a nice place to golf
3. The goal is to make the ball into the hole
What is the mean distance between the Sun and the core of
the Milky Way?
Answer:
about 8 kpc
Explanation:
why do plants on the floor of a rainforest often have reddish-colored leafs?
A, to help absorb as much sunlight as possible.
B, to camouflage themselves from predators.
C, to attract pollinators
D, To warn animals that the leaves are poisonous.
PLEASE HELP BY TODAY THANKS :)
Answer:
c i hope this helps
Explanation:
A ball is released from a height of 20 metres. Calculate; 1. The time it takes to fall 2. The velocity with which it hits the ground
Answer:
Final velocity of ball = 20 m/s
Explanation:
Given:
Height when ball released = 20meter
Find;
Time taken to fall
Final velocity of ball
Computation:
Initial velocity of ball = 0 m/s
Acceleration due to gravity = 10 m/s²
Using equation of motion;
S = ut + (1/2)(g)(t²)
20 = (0)(t) + (1/2)(10)(t²)
20 = 5(t²)
(t²) = 20 / 5
(t²) = 4
Time taken to fall = 2 second
V = u + at
V = 0 + (10)(2)
Final velocity of ball = 20 m/s
Which caused the greatest increase of the growth of the human population
Answer:
This rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age. By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.
Explanation:
The main cause of human population growth is increased well-being.
Well-being is a term to refer to the state of satisfaction of economic, social, labor, psychological, biological needs, among others of the human.
Therefore, when civilizations and societies became more complex, many issues such as health, food, hygiene, education, government, among others, improved, giving more well-being to their inhabitants.
Well-being has evolved with society and today people have access to many things, services, and goods that give them well-being, improving their quality and life expectancy. Therefore, the correct answer is well-being.
Learn more at: https://brainly.com/question/10571076
I NEED THIS DONE ASAP I WILL MARK YOU THE BRAINLIEST BUT NO LINKS
Put the correct terms with the correct pictures
Answer:
1. Static Friction
2. Sliding friction
3. Fluid friction
4. is rolling friction
Sorry if i am wrong
Explanation:
A vector is 14.4 m long and
points in a 133 degree
direction.
Find the x-component of the
vector.
X-component (m)
Answer:
Explanation:
The x-component is found in the magnitude of the vector times the cosine of the angle.
[tex]A_x=14.4cos133[/tex] and, to 3 sig dig,
[tex]A_x=-9.82m[/tex]
(PLESE HELP) why does boiling pot of water have more temperature that an iceberg