Answer:
7.35 m
Explanation:
We can solve with kinematics or with energy.
Using kinematics, given:
v₀ = 12 m/s
v = 0 m/s
a = -9.8 m/s²
Find: Δy
v² = v₀² + 2aΔy
(0 m/s)² = (12 m/s)² + 2 (-9.8 m/s²) Δy
Δy = 7.35 m
Using energy instead:
PE = KE
mgh = ½ mv²
gh = ½ v²
h = v² / (2g)
h = (12 m/s)² / (2 × 9.8 m/s²)
h = 7.35 m
Alisa needs to make some hot tea for her ill mother. She uses some ice-cold water from the freezer and heats it up in the kettle. As she hears the teapot whistling, she asks herself, “How is the motion of the ice water’s particles changing as the hot tea is being made?”
please help i need an answer ASAP :C
the French Broad, The Mississippi, and the Amazon are examples of ____
-turbidity
-streams
-springs
-rivers
HELP HELP HELP NOW PLEASEEEEEEE
how could you increase the kinetic energy of a wagon without increasing its mass?
Answer:
use newtons gravity of law by launching a watermelon in frot of the wagon
Explanation:
Issac throws an apple straight down from a tree with an initial speed of 5.0 m/s
Answer:
what's the question to this
Suppose the deer population in a region is expected to increase by 6% in the next year. If there are currently 11,650 deer living in the region, approximately how many will be living there a year from now?
Answer:
12,349 deers
Explanation:
Present population size of deer = 11,650
Expected percentage increase in population size by next year = 6%
6% of 11,650 = 6/100 x 11,650
= 699
Adding this to the present population: 11,650 + 699 = 12,349.
Hence, the total number of deer expected to be living in the population a year from now (that is, next year) is 12,349 deers.
At what point does the rollercoaster have the most GPE? A,C B,A C,E D,B E,D
Answer:
b
Explanation:
An object of mass 10 kg is released from rest above the surface of a planet such that the object’s speed as a function of time is shown by the graph above. The force due to gravity exerted on the object is most nearly
Answer:
100NExplanation:
Hey there!!!, there are no attached files/graphs to this question, but we can find our way and solve for the gravitational force acting on the mass
Step one:
given data
mass= 10kg
acceleration due to gravity= 9.81m/s^2
Step two:
The expression for the gravitation force is given as
Gravitational force F=mass * acceleration due to gravity
Fg=ma
substituting we have
Fg=10*9.81
Fg=98.1N
The force due to gravity exerted on the object is most nearly 100N
What controllable risk factors for heart disease did Brenda’s father have?
Controllable risk factors that Brenda'a father may have had include dietary choices, amount of exercise, sleep schedule, among other things.
The controllable risk factors for heart disease that Brenda’s father has include stress, smoking, high blood pressure, etc.
Blood pressure is a risk factor for heart disease. High blood pressure increases the risk of heart disease.
Another risk factor is smoking. It is advisable for people not to smoke in order to avoid having diseases. If one smokes, there's a higher chance that the person will have heart disease.
In conclusion, it's also important for one to rest very well and not stress himself or herself.
Read related link on:
https://brainly.com/question/22909359
You stand on a pier watching water waves and see 10.9 waves pass by in a time of 28 seconds. What is the frequency of the water waves?
Answer:
0.4Hz
Explanation:
Given parameters:
Number of waves = 10.9waves
Time taken = 28s
Unknown:
Frequency of water waves = ?
Solution:
The frequency of a wave is the number of waves that passes through a point per unit of time.
Frequency = [tex]\frac{number of waves }{time}[/tex]
Insert parameters and solve;
Frequency = [tex]\frac{10.9}{28}[/tex] = 0.4Hz
The starting velocity was 0 m/s, and the final velocity
was -15.35 m/s. Based on this, what was the average
velocity of the rock? In general, to find the average of
any 2 things, you add them together and divide by how
many things there are.
Answer:
The average velocity is -7.675 m/s
Explanation:
Given;
initial velocity, u = 0 m/s
final velocity, v = -15.35 m/s
Based on the follow up state " In general, to find the average of any 2 things, you add them together and divide by how many things there are", the average velocity will be calculate as ;
Sum of the velocities = 0 m/s + (-15.35 m/s) = -15.35 m/s
Number of velocites = 2
AVERAGE VELOCITY = (-15.35 m/s) / (2)
AVERAGE VELOCITY = -7.675 m/s
What is true about the electric and magnetif fields as the electromagnetic wave moves?
a The angle between them is constantly increasing
b the angle between them is decreasing
c They are parallel
d They are perpendicular (90º)
Answer:
d They are perpendicular (90º)
Explanation:
When electric and magnetic fields moves they are perpendicular to one another.
Electromagnetic fields are composed of both electric and magnetic fields. In motion, the two fields moves perpendicular to one another. These waves are mostly generated through natural activities. They are called transverse waves and moves perpendicular to the particles. Examples are light waves, radio waves, etc.1. chemistry the study of matter and energy and how they interact 2. physics the systematic study and analysis of facts 3. science a process to test a proposed solution to a problem 4. scientific method the study of the structure, properties, and interactions of materials and the changes they undergo
Answer:
1. Chemistry- the study of the structure, properties, and interactions of materials and the changes they undergo.
2. Physics- the study of matter and energy and how they interact.
3. Science- the systematic study and analysis of facts.
4. Scientific method- a process to test a proposed solution to a problem.
Explanation:
1. Chemistry is a branch of science that deals with the study of the structures, properties, and interactions of various materials with other materials. It also includes the study of such changes that may occur during such interactions.
2. Physics is also one branch of science that deals with the study of matter and energy. Contrary to chemistry, this scientific branch deals with the interaction of matter and energy, their motion, and behavior especially related to space and time.
3. Science is the systemic study and analysis of facts. It is the understanding of the natural and scientific world, dealing with the elements of how and why things work.
4. Scientific method is the method or process by which tests are made to ascertain problems and find a solution for such. It is the method of getting knowledge and solutions, the experimentation to get to a conclusive result.
A runner is jogging in a straight line at a steady vr= 8.8 km/hr. When the runner is L= 3 km from the finish line, a bird begins flying straight from the runner to the finish line at vb= 17.6 km/hr (2 times as fast as the runner). When the bird reaches the finish
Answer:
Explanation:
Speed of runner Vr = 8.8 km / h
distance to be covered = 3 km
time taken by runner to reach finish line = 3 / 8.8 h = .34 s
distance covered by the bird during this period = speed of bird x time
= 17.6 x .34 = 5.98 km .
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.25 m/s. The stone subsequently falls to the ground, which is 13.3 m below the point where the stone leaves your hand. At what speed does the stone impact the ground? How much time is the stone in the air? Ignore air resistance and take g = 9.8 m/s2.
Answer:
1.) 17.3 m/s
2.) 1.8 s
Explanation:
Given that While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.25 m/s.
The maximum height will be calculated by using third equation of motion
At maximum height, V = 0
V^2 = U^2 - 2gH
0 = 6.25^2 - 2 × 9.8 × H
39.06 = 19.6H
H = 39.06 / 19.6
H = 1.993m
The stone subsequently falls to the ground, which is 13.3 m below the point where the stone leaves your hand. At what speed does the stone impact the ground?
Using the same formula again.
Where the height = 13.3 + 1.993
Height = 15.29m
Substitutes the height into the third equation of motion
V^2 = U^2 + 2gH
U = 0
V^2 = 0 + 2 × 9.8 × 15.29
V^2 = 299.74
V = sqrt ( 299.74 )
V = 17.3 m/s
How much time is the stone in the air? Ignore air resistance and take g = 9.8 m/s2.
Using the second equation of motion formula
H = Ut + 1/2gt^2
U = 0
15.29 = 1/2 × 9.8 × t^2
15.29 = 4.9t^2
t^2 = 15.29 / 4.9
t^2 = 3.120
t = sqrt ( 3.120 )
t = 1.766 s
Therefore, the stone is on air for 1.8s approximately.
What happens to the tension in the string as the weight of the block increases? Explain your answer
Answer:
the weight becomes thicker and harder to carry as the weight plottens,
Explanation:
i did this
A cart is loaded with a brick and pulled up a ramp. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart on top of the ramp?
Answer:
Potential energy = 13.23 J
Explanation:
Given that,
The mass of the loaded cart, m = 3 kg
Its height of the seat top is 0.45 m
We need to find the potential energy of the loaded cart on top of the ramp. We know that, the potential energy of an object is due to its height. It can be given by the formula as follows :
[tex]E=mgh\\\\E=3\ kg\times 9.8\ m/s^2\times 0.45\ m\\\\E=13.23\ J[/tex]
So, the required potential energy is 13.23 J.
what would be the distance a bomb traveled in the X direction if it fell out of an airplane at 25,000 meters high and was traveling 50 meters per second.
Answer:
The bomb will land at approximately 3.5 Km
Explanation:
Horizontal Motion
The bomb is thrown horizontally by an airplane with a speed v=50 m/s from a height h=25,000. The range or maximum horizontal distance traveled by the object can be calculated as follows:
[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]
[tex]\displaystyle d=50\cdot\sqrt{\frac {2*25,000}{9.8}}[/tex]
[tex]\displaystyle d=3,571.43\ m[/tex]
The bomb will land at approximately 3.5 Km
During which changes of state do atoms overcome the attractive forces between them?
A freezing and condensation
B boiling and deposition
C condensation and melting
D vaporization and sublimation
Answer:
D) vaporisation and sublimation
Explanation:
Answer:
D
Explanation:
vaporization and sublimation
A car is traveling in a straight line path at a maximum speed of 7.00 m/s. The driver of the vehicle applies the brakes bringing the car to a stop after traveling 10.0 m. What is the magnitude of the car's acceleration to the nearest hundredths place?
Answer:
[tex]a=-2.45\ m/s^2[/tex]
Explanation:
An object is traveling at constant acceleration if its changes in speed are constant at the same intervals of time.
The acceleration can be calculated as follows:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
Where vo is the initial speed, vf the final speed and t is the time.
The acceleration and the distance x are related through the following equation:
[tex]v_f^2=v_o^2+2.a.x[/tex]
The car has an initial speed of vo=7 m/s when the driver stops the car (vf=0) after traveling x=10 m.
The acceleration can be calculated by solving the last equation for a:
[tex]\displaystyle a=\frac{v_f^2-v_o^2}{2x}[/tex]
[tex]\displaystyle a=\frac{0-7^2}{2*10}[/tex]
[tex]\displaystyle a=\frac{-49}{20}[/tex]
[tex]\boxed{a=-2.45\ m/s^2}[/tex]
An object starts at position 12 on a horizontal line with a reference point of 0. What is the position of the object if it moves 14 units to the left?
–26
–2
2
26
Answer:
Answer is negative -2 think about this is basically a sbrtaction problem the number starts at 12 and then it moves 14 to left which means backwards so 12-14=-2 so thats were u get -2 as your answer.
Explanation:
wanted to help people plus I am doing the quiz right now.
There is a temperature change of 3 °C in the room when 1.5 kg of water flows through the
radiator each second.
The specific heat capacity of water is 4200 J/kg°C.
i.
Calculate the amount of energy given to the room by the 1.5 kg of water as it passes
through the radiator.
Show your working and write down the unit.
Answer:
18900J
Explanation:
energy = Temperature change * Mass * Specific Heat Capacity
3*1.5*4200=18900
=18900J
Answer:
Explanation:
Q = mcT
where,
Q is heat(energy)
m is mass
c is specific heat capacity
T is change in temperature
so,
Q= 1.5kg x 4200 J/kg.C x 3C
Q = 18900J of energy
PLEASE HELPP
Select ALL the correct answers.
Which of these factors make hydrogen fuel cells a better option than burning fossil fuels?
1. Hydrogen fuel cells have a higher energy efficiency.
2. Hydrogen fuel cells create less pollution.
3. Burning fossil fuels relies on outdated devices and technology.
4. Hydrogen is the most abundant element in the universe.
5.Hydrogen fuel cells are more expensive than fossil fuels.
Answer:
Hydrogen fuel cells have a higher energy efficiency.
Hydrogen fuel cells create less pollution.
Explanation:
Calculate the acceleration of a 300,000-kg jumbo jet just before takeoff when the thrust on the aircraft is
120,000n
I
Answer:
0.4 m/s²
Explanation:
Use Newton's second law.
∑F = ma
120,000 N = (300,000 kg) a
a = 0.4 m/s²
Set the cannon height to 14 m and the initial speed to 20 m/s. Show how to calculate the location of the target. Verify your prediction using the simulation.
Answer:
Explanation:
The location of the target can be determined by calculating the horizontal distance according to the projectile formula
R = U*√2H/g
U is the initial speed = 20m/s
H is the maximum height = 14m
g is the acceleration due to gravity = 9.81m/s²
Substitute
R = 20*√2(14)/9.81
R = 20√28/9.81
R = 20√2.85
R = 20(1.689)
R = 33.79m
Hence the location of the target is at 33.79m
Use the excerpt from an online article to answer the question. "While the big bang theory is the most popular modern theory of how the universe formed, it is incomplete." Which question does the big bang theory leave unanswered? (1 point) When did the universe form? What is the temperature of deep space? What is the future of the universe? How did galaxies and stars form?
Which question does the big bang theory leave unanswered?
Accordingly with THE HOT BIG BANG COSMOLOGY from Andrew R. Liddle, University of Sussex, David H. Lyth, Lancaster University. Some problems are not explained by the big bang theory as the existence of multiverse or single universe as well as what laws of physics were responsible for the collapse of the big bang.
When did the universe form?
the age of the universe is the time elapsed between the Big Bang until the present moment. A few years ago, the WMAP probe collected data that led astronomers to conclude that the probe's data accepted the determination of the age of the Universe at 13.787 ± 0.020 billion years.
What is the temperature of deep space?
It depends on what part of the space we are talking about. In general, it works like this: the closer to the stars, the higher the temperature. Another factor is the presence of matter: heat can be retained by it. As the space becomes empty, the temperature drops. In the total vacuum (no matter), the temperature drops to minus 272 ºC, 1 degree above absolute zero.
How did galaxies and stars form?
Typically, most stars were formed from large molecular clouds. When somewhere in the cloud there is a certain density of massive molecules, they tend to collapse and the central density then tends to increase rapidly, while the density on the outside remains almost constant.
The most accepted theory for the formation of galaxies is that the structures we observe today are formed as a consequence of the growth of primordial fluctuations due to gravitational instability. The primordial fluctuations caused that the gases were attracted to areas of denser material, supercumulus, galactic clusters, galaxies, stellar cumulus and stars are formed hierarchically. One consequence of this model is that the location of galaxies indicates areas of high density in the primordial Universe. Thus, the distribution of galaxies is closely related to the physics of the early Universe.
Recent data provides evidence that the first galaxies formed much earlier than astronomers predicted, only 600 million years after the Big Bang. This leaves little time for the primordial small instabilities to have grown large enough for protogalaxies to form galaxies.
Answer:
Your answer is: What is the future of the universe
Explanation:
I really need help plz
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Answer:
true!! hope this helps
it has to be 20 characters ignore my extra typing
Atoms are neutral in electric charge because they have the same
number of negative electrons as positive protons, and the electric
charges "cancel out."
A: True
B: False
How much mass is required to exert a force of 25 Newtons, accelerating at 5 m/s2?
help pleaseee!
Answer:
5
explanation:
25 divided by 5
Answer:
25/5= 5
Explanation:
A boy on his skateboard is accelerating at a rate of 5 m/s2 and has a mass of 40kg. How much force does the boy on his skateboard have?
Answer:
The answer is 200 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 40 × 5
We have the final answer as
200 NHope this helps you
Can somebody plz answer this grade6 science question? Only answer in
1-2 sentences!
(WILL MARK BRAINLIEST)
Answer:
Alkali metals are reactive, soft metals with low densities. Noble gases are all unreactive non-metals
Explanation: