Answer:
[tex]\displaystyle KE = 32 \ J[/tex]
General Formulas and Concepts:
Energy
Kinetic Energy Formula: [tex]\displaystyle KE = \frac{1}{2}mv^2[/tex]
KE is in Jm is in kgv is in m/sExplanation:
Step 1: Define
Identify variables
m = 2 kg
v = 4 m/s
Step 2: Find KE
Substitute in variables [Kinetic Energy Formula]: [tex]\displaystyle KE = (2 \ kg)(4 \ m/s)^2[/tex]Simplify: [tex]\displaystyle KE = 32 \ J[/tex]Topic: AP Physics 1 - Algebra Based
Unit: Energy
Governments have the most economic power in which economic system?
A Command economy
B. Mixed economy
C. Traditional economy
D Market economy
Answer:
A
Explanation:
thats what I think , though not sure
Answer:
The answer is A. Command economy
Explanation:
In a command economy, the government has the most control.
if a wave has a period of 0.25 seconds what is its frequency?
Answer:
4
Explanation:
1/.25 =4
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Shondra has heard some conflicting advice. On one hand, she heard that weighing yourself every day is important to maintain a healthy weight. On the other hand, she learned that even developing healthy habits for several weeks does not lead always lead to weight loss. She is afraid that if she changes her habits and does not see results on the scale, she will just get discouraged. What is the BEST response to Shondra?
A.
The scale should just be one method of monitoring her overall health.
B.
She will actually see weight loss right away if she changes her habits.
C.
There are very few ways to document weight loss other than the scale.
D.
Regular weigh ins should begin once she has already lost some weight.
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Weight loss for a fat body does not make a sense of healthy habits. The scale should just be one method of monitoring her overall health.
What are healthy habits?Healthy habits include good food habits, regular exercising, personal hygiene and positive mind. These all factors affecting our health and it not just our weight.
Body weight can be controlled up to a limit by healthy habits and and controlled food. However, the some people might have a nature of fatty body or skelt irrespective of their habits. In such cases people no need to worry on their health by just looking on their weight.
Weight scale should just be one method of monitoring the overall health. By losing weight or gaining weight we cant said to be in good health. Therefore, option A be the best response to Shondra.
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Help me plzzzzz
Will give Brainlyest
[Questoin 1] Volume
"Charles's law is an experimental gas law that describes how gases tend to expand when heated." Expand = volume, so this answer is correct
[Question 2] b) move faster
An increase in heat is an increase in energy, which is an increase in particle movement. This means that b is correct, because the particles will be moving faster
[Question 3] a) Celsius
Charles' Law uses Celsius, so when doing Charles' Law problems you should use Celsius, aka °C
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Four importance of soil water
Answer:
nitrogen, phosphorus, potassium, and calcium
Explanation:
Just put it.
Which equation correctly relates mechanical energy, thermal energy, and total
energy when there is friction present in a system?
A. Etotal = ME x Ethermal
=
B. Etotal = ME + Ethermal
C. Etotal = ME - Ethermal
O D. Etotal = Ethermal - ME
The total energy could then be written as; Etotal = ME + Ethermal
What is energy?The term energy is the refers to the ability to do work. We know that according to the first law of thermodynamics, energy is neither created nor destroyed but can be converted from one form to another.
The total energy of the system must then be the sum of all the energies that are in the system. In this case, the system has both mechanical and thermal energy.
The total energy could then be written as; Etotal = ME + Ethermal
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Need help!!
Dina has been working out for a few weeks. She wants to really focus on developing healthy habits rather than a very specific goal, like losing weight. She knows that tracking can help maintain health. What could she document that would let her see progress?
A.
She should just create a long-term goal.
B.
She could note the lengths and speeds of her morning runs.
C.
She should write down what she weighs when she wakes up in the morning.
D.
She can record what days she exercises and the type of activity.
Answer:
The correct choice is A. She should just create a long-term goal.
When battery voltage drops below _________volts while cranking, the voltage-sensing relay will typically open-circuit the starter relay circuit.
HELP IS FOR TOMORROW PLEASE
Answer:
The first one: 240 meters
The second one: 960 meters
Explanation:
What is the average speed of a bus that travels 170 km in 2 hours and then slows down to 70 km/hr?
Answer: 77.5
Explanation:
Okay so, You have 3 numbers in this equation, 170, 2, and 70.
Divide 170 by 2= 85
Add 85 + 70= 155
Now divide 155 by 2= 77, R1 = 77 1/2. You can turn 77 1/2 to 77.5
Answer: 77.5
Las trampas de CO2 calientan muy bien. Eso significa que cuanto más CO2 hay en el
océano, más(. ) se vuelve el océano.
Determine the momentum of a 20 kilogram object that is
moving at 4.0 meters per second.
Answer:
80 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question
mass = 20 kg
velocity = 4 m/s
We have
momentum = 20 × 4 = 80
We have the final answer as
80 kg.m/sHope this helps you
Animals which consume only plants are called
Answer:
herbivores
Explanation:
Animals that eat plants exclusively are herbivores.
Animals that eat only meat are carnivores.
When animals eat both plants and meat, they are called omnivores.
A large carnivore might hunt down large herbivores such as elk and deer.
PLEASE PLEASE PLEASE HELP ME!!!!!!!!!!!!!! PLEASE
Answer:
not sure what I am looking at
Explanation:
but I am sorry
Which of the following concepts can be defined as the ability to cause change?
A. energy
B. resistance
C. force
D. temperature
Answer:
A. Energy
Explanation:
In general, the word energy refers to a concept that can be paraphrased as "the potential for causing changes", and therefore one can say that energy is the cause of any change. The most common definition of energy is the work that a certain force (gravitational, electromagnetic, etc) can do..I really hope this helps.
Whats the formula for calculating kinetic energy
your eyes see different wavelengths of light as different ________.
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."
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Which BEST explains why puberty is such a challenging time to maintain a positive body image?
A.
Puberty is full of negativity for most people.
B.
Puberty causes a lot of uncomfortable changes.
C.
Puberty is a temporary state, so any issues will pass.
D.
Puberty requires a lot of discipline to negotiate successfully.
PLEASE NO LINKS
Answer:
B
Puberty is a challenging time to maintain positive body image, because it causes uncomfortable changes. While A, C, & D are true, they do not explain why it is a challenging time to maintain positive body image.
Explanation:
Hope this helps! Shalom
Answer: B. Puberty causes a lot of uncommon changes.
Explanation:
How many grams of water would require 2200.0 joules of heat to raise its temperature from 34.0 °C to 100.0 °C? The specific heat of water is 4.18 J/g°C.
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Index Fossils can help scientists determine the age of a rock layer because they are present in every rock layer since the beginning of life on Earth.
Answer:
They were only present during a short time frame, so it helps to narrow down the age of the rock layer.
Explanation: hope this helps :)
A force of 1000N acts to stop a 1000kg car moving at 20m/s. How much time does it take the car to stop?
Answer:
Explanation:
How much force does a 1000kg car need to accelerate at 3m s2 to the south?
Answer- the force needed to accelerate the 1000kg car by 3m/s2 is 3000N.
A fireworks shell is accelerated from rest to a velocity of 82.0 m/s over a distance of 0.400 m. (a) How long did the acceleration last
Find the acceleration:
v² - u² = 2ax
(v = final velocity, u = initial velocity, a = acceleration, x = displacement)
(82.0 m/s)² - 0² = 2 a (0.400 m)
a = (82.0 m/s)² / (2 (0.400 m))
a = 8405 m/s²
Find the time:
x = ut + 1/2 at²
(t = time)
0.400 m = 0 + 1/2 (8405 m/s²) t²
t² = (0.400 m) / (1/2 (8405 m/s²))
t = √((0.400 m) / (1/2 (8405 m/s²)))
t ≈ 0.00976 s
approximately how many days after a full moon does the new moon occur?
It takes 29.5 days for a new moon to occur approximately after a full moon.
If Emily throws the ball at an angle of 30∘ below the horizontal with a speed of 14m/s, how far from the base of the dorm should Allison stand to catch the ball? Assume the vertical distance between where Emily releases the ball and Allison catches it is 4.0m.
Emily throws the ball at 30 degree below the horizontal
so here the speed is 14 m/s and hence we will find its horizontal and vertical components
v_x = 14 cos30 = 12.12 m/sv
x
=14cos30=12.12m/s
v_y = 14 sin30 = 7 m/sv
y
=14sin30=7m/s
vertical distance between them
\delta y = 4 mδy=4m
now we will use kinematics in order to find the time taken by the ball to reach at Allison
\delat y = v_y *t + \frac{1}{2} at^2\delaty=v
y
∗t+
2
1
at
2
here acceleration is due to gravity
a = 9.8 m/s^2a=9.8m/s
2
now we will have
4 = 7 * t + \frac{1}{2}*9.8 * t^24=7∗t+
2
1
∗9.8∗t
2
now solving above quadratic equation we have
t = 0.44 st=0.44s
now in order to find the horizontal distance where ball will fall is given as
d = v_x * td=v
x
∗t
here it shows that horizontal motion is uniform motion and it is not accelerated so we can use distance = speed * time
d = 12.12 * 0.44 = 5.33 md=12.12∗0.44=5.33m
What is the relationship between the surface tension and viscosity of a liquid?
Answer:liquid
Explanation:
What is the speed of a bird of mass 8kg which has kinetic energy of 8836J?
Answer:
For the bird moving in a straight line, the kinetic energy is one-half the product of the mass and the square of the speed: Ek=12mu2.
What Is the west component of 85 m 25 north of west
Answer: 17 m/s,
Explanation:
A Ferris wheel rotates 12 times on for each ride. A passenger is 5 meters from the center of the wheel. The ride takes 10 minutes to complete. What is the angular speed (in radians/second) of the passenger?
The angular speed of the passenger in radians per second is 0.126 rad/s.
The given parameters;
number of turns of the wheel, N = 12 position of the passenger from the center of the wheel, r = 5 mtime of motion, t = 10 minutes, = 600 sThe angular speed of the passenger in radians per second is calculated as follows;
[tex]\omega = \frac{2\pi N}{T} \\\\\omega = \frac{2\pi \times 12 \ rad}{600 \ s} \\\\\omega = 0.126 \ rad/s[/tex]
Thus, the angular speed of the passenger in radians per second is 0.126 rad/s.
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A ball is thrown straight up from the ground with an initial velocity of 31.2 m/s; at the same instant, a ball is dropped from the roof of a building 21.3 m high. After how long will the balls be at the same height
Answer:
S1 = V1 t + 1/2 g t^2 distance traveled by ball dropped
S1 = 1/2 g t^2 since ball is dropped and V1 = zero
S2 = -1/2 g t^2 + V2 t height to which ball 2 rises in time t
S1 + S2 = V2 t both balls at same height after time t
t = S / V2 = 21.3 / 31.2 = .683 sec
Check:
S1 = 1/2 g t^2 = 9.8 / 2 * .683^2 = 2.29 m
S2 = 31.2 * .683 - 9.8/2 * .683^2 = 19 m
Total distance traveled = 2.29 + 19 = 21.3 m
What is the rate at which work is done?
Answer:
The rate at which work is done would be power. Bonus: The SI unit of work is Joules.
Explanation:
Hope this helped, nya~ :3
