Answer:
12 is a tween (preteen) and still growing, definitely still a kid and not really a teen
Answer:
nope
Explanation:
13 thir TEEN
How long would it take a bowling ball to fall (starting from rest)
from the top of the Leaning Tower of Pisa (58.36 meters)
That would depend on how much it weighs
Keeping in mind that not all flasks are vacuum, Please help me explain how other flasks prevent heat loss?
A man is whirling a 0.25 kg ball on a 1.5 m long string at 3 m/s. Find the centripetal acceleration of this ball.
O 13.5 m/s2
0 0.5 m/s2
m.
2 m/s2
6 m/s2
The centripetal acceleration of the ball been whirled in a circular path is 6m/s².
Hence, Option D) 6m/s² is the
Given the data in the question:
Mass of ball; [tex]m = 0.25kg[/tex]Length of string or radius; [tex]r = 1.5m[/tex]Speed; [tex]v = 3m/s[/tex]Centripetal acceleration is the acceleration of a particle moving in a circular path. It is expressed as:
[tex]a_c = \frac{v^2}{r}[/tex]
Where [tex]a_c[/tex] is the Centripetal acceleration, v is the speed of the motion and r is the length of the string or radius of the circular pattern.
We substitute our given values into the equation
[tex]a_c = \frac{(3m/s)^2}{1.5m}\\\\a_c = \frac{9m^2/s^2}{1.5m}\\\\a_c = 6m/s^2[/tex]
The centripetal acceleration of the ball been whirled in a circular path is 6m/s².
Hence, Option D) 6m/s² is the correct answer.
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please help ! Which of the following objects has the greatest momentum?
Answer:
maybe the third one....
Electricity consumption in the United States totaled about ____________ kilowatthours (kWh) in 2015.
Answer:
3,900
Explanation:
What is the smallest possible wavelength of light?
Explanation:
Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum.
Explain how energy changes in the spring toy below when it goes downstairs
Answer:
As a pendulum swings, its potential energy changes to kinetic energy, then back to potential energy, then back to kinetic energy, and so forth.
hope this helped<3
How much force is required to swing a 3 kg mass in a circle with a radius of 1.5 m at
a speed of 5 m/s?
F =ma.
The force is required to swing the mass in a circular path with the given radius and speed is 50 Newtons.
Given the data in the question;
Mass; [tex]m = 3kg[/tex]Radius; [tex]r = 1.5m[/tex]Speed; [tex]v = 5m/s[/tex]Force; [tex]F =\ ?[/tex]
From the Newton's second law of motion:
[tex]F = ma[/tex]
Where F is force applied, m is mass and a is acceleration
Now force a circular motion Centripetal Acceleration is expressed as:
[tex]a_c = \frac{v^2}{r}[/tex]
Hence, force is required to swing the mass in a circular path will be:
[tex]F = m * a_c\\\\F = m * \frac{v^2}{r}[/tex]
We substitute our given values into the equation;
[tex]F = 3kg * \frac{(5m/s)^2}{1.5m}\\\\F = 3kg * \frac{25m^2/s^2}{1.5m}\\\\F = 50 kgm/s^2\\\\F = 50N[/tex]
Therefore, force is required to swing the mass in a circular path with the given radius and speed is 50 Newtons.
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how many times has the u.s. landed astronauts on the moon?
Answer:
six crewed landings
Explanation:
help please! btw this is science
Answer:
I hope this helps if not I am sorry good luck
Explanation:
The food of the foxes is the voles and if the their population went down of course the foxes would too if the voles went extinct what would the foxes eat surley they would die since their food source is shortened .
The density of aluminum is 2700 kg/m3. If transverse waves propagate at 34 m/s in a 4.6-mm diameter aluminum wire, what is the tension on the wire
Answer:
52N
Explanation:
v=SQRT(T/μ), μ=pA, A=πr^2
v=SQRT(T/pπr^2)
v^2=T/pπr^2
v^2*pπr^2=T
34^2*2700*π*0.0023^2=T
T=52N
The tension on the aluminum wire at the given density is 52.02 N.
Tension in the wire
The tension in the wire is calculated using the following formulas;
[tex]v = \sqrt{\frac{T}{\mu} }[/tex]
where;
v is speed of the sound waveT is the tension in the wireμ is mass per unit lengthArea of the aluminum wireA = πd²/4
A = π x (4.6 x 10⁻³)²/4
A = 1.66 x 10⁻⁵ m²
Mass per unit length of the wireμ = ρA
μ = 2700 kg/m³ x 1.66 x 10⁻⁵ m²
μ = 0.045 kg/m
Tension on the wire[tex]34 = \sqrt{\frac{T}{0.045} } \\\\34^2 = \frac{T}{0.045}\\\\T = (34^2)(0.045)\\\\T = 52.02 \ N[/tex]
Thus, the tension on the aluminum wire at the given density is 52.02 N.
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A car starting from rest accelerates at a rate of 8m/s what is the final speed at the end of 4 seconds?
Answer:
vf = 32ms
Explanation:
v = u + a t ,
v = 0 + 8.0 x 4.0
v = 32 ,
v = 32 m /s
Hope it Helps! :D
a doctor observe areas of pink scaly skin on patient
Answer:
0-0 what is rhat supposed to mean. i dont think anyone can answer that lol
Compare and contrast gravitational potential energy and elastic potential energy?
Answer:
The gravitational potential energy of an item is determined by its weight and height above the ground, whereas elastic potential energy is determined by the form of the object. When an elastic item is stretched or compressed, this occurs.
Why type of energy is present after a solar panel changes forms?
Explanation:
Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.
I am giving 100 points for you to answer 3 questions...
Question 1:
Research the fossil record of humpback whales and answer these questions:
Name at least two extinct species that share a close evolutionary relationship with humpback whales.
Explain the similarities and differences that exist between these species and humpback whales.
Is the fossil record complete for humpback whales? Explain your answer.
Question 2:
Explain scientifically whether humans and humpback whales share a close evolutionary relationship. Here are some ideas to consider as you structure your response:
Do they have any body structure similarities that suggest an evolutionary link?
How do scientists classify each organism? What is their kingdom, phylum, class order, and so on? Does this tell you anything about their evolutionary lineage?
Does their embryology hold any clue to their evolutionary relationship?
Question 3:
Conclude your research on humans and humpback whales by answering these questions:
What conclusion can you draw about the evolution of humans and humpback whales?
Did your research show that your original predictions were correct? Explain your answer.
Answer:
Two extinct species that share a close evoluntionary relationship with humpback whales are Dourdon and Basilosaurs. They had tailfins
No we do not have any body structure similarities to them. Scientist classify each organism by looking at their characteristics and their appearance. Yes it tells you something about the evoluntinary lineage becuase throw characteristics it can show how they have evolved
The conclusions that I can draw is that we do have some things common with humpback whales. Yes my original predictions were correct. They do have a common evoluntianry link as I stated in the beginning. I learned alot more than I knew at first about the similarties.
Explanation:
run me my points gimme 5 stars and a thanks. Why? cus i ran dem answers cmon now
Answer:
the person above me is right
Explanation:
+ 50 PLEASE HELP ME IM SO CONFUSED
Answer:
Place the nickel at 1" point on the ruler for each trial. Then, drop the quarter from 12" for each trial.
Here are the results-
Middle Trials (6")
T1: moved right about 0.5"
T2: moved left 1" and backwards 0.5" (-0.5")
T3: moved right 2" and backwards 0.5" (-0.5")
______________________________________
9" trials
T1: Right about 1"
T2: Right 0.5"
T3: around 0.8" foward
______________________________________
12" trials were all at 0" in change
______________________________________
The 12" trial requires more force for movement while the 9" trial gave the most positive changes forwards.
Explanation:
Information-
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A 50,000 kg plane is flying at a constant velocity of 130 m/s. Is the plane in a state of equilibrium
Answer:
yes
Explanation:
Equilibrium means that all the forces acting upon the object are balanced. A cruising airplane has all four forces balanced, with no external forces acting on it. As a result it will remain in its motion at a constant velocity until an external force acts upon it
A ray of light travelled from water into the air an angle of incidence of 30°. Calculate;
a) Its speed in water
b) angle of refraction in air. (Refractive index of water = 1.33)
c) Speed of light in air = 3.0 × 10⁸ m/s
hence calculate the critical angle of light in water.
Answer:
speed = distance/time
just find the speed if it
‼️ IN DESPERATE NEED OF HELP ‼️ i have a time limit of 20 minutes and i’m so lost, please help with a step-by-step explanation
The blue color of the sky results from the scattering of sunlight by air molecules. If the blue light of the sky
has a frequency of about 7.5 x 10“ Hz, what is the wavelength of this radiation (in m)?
0.00004
Explanation:
velocity of electromagnetic waves = 3.0×10^8.
Wavelength=velocity/frequency
(3.0×10^8) (7.5×10^12)
A race car travels on a straight racetrack with
a forward velocity of 44 m/s and slows at a
constant rate to a velocity of 22 m/s over 11 s.
How far does it move during this time?
Answer:968 m/s
Explanation:
If a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s, then the distance traveled by the race car would be 343 m.
What are the three equations of motion?There are three equations of motion given by Newton
The first equation is given as follows
v = u + at
the second equation is given as follows
S = ut + 1/2×a×t²
the third equation is given as follows
v² - u² = 2×a×s
As given in the problem Question a race car travels on a straight racetrack with a forward velocity of 44 m/s and slows at a constant rate to a velocity of 22 m/s over 11 s,
initial velocity = 22 m/s
final velocity = 44 m/s
time = 11 s
By using the first equation of motion,
v = u + at
44 = 22 + 11a
11a = 22
a = 2 m/s²
By using the second equation of motion,
S = ut + 1/2*a*t²
u= 22m/s , a= 2m/s² and t = 11seconds
S = 22*11 + 0.5*2*11²
S = 222+121
S= 343 m
Thus, the distance covered by the race car would be 343 m.
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In elementary school, 40% of girls and 25% of boys are unhappy with the shapes of their bodies. OA. True O B. False
1. State Newton's 3 laws of motion in your own words.
1st law INERTIA
2nd law (Force = mass x acceleration)
3rd law (all actions have opposite reaction)
What is resistanance?
Answer:
Resistance is a measure of the oppostion to flow current in a electrical circuit
Explanation:
I hope it's help u army
Please if someone knows the answer please tell me
Answer:
i think its electrostatic force
what two factors affect how much gravitational potential energy an object-earth system has?
Answer:
height and mass
Explanation:
gpe = mass x height x gravitational field strength
when a wave moves through an opening in a barrier it
A.is reflected
B.bends and spreads out
C.Forms nodes and antinodes
D.speeds up
A ball was positioned in the middle of a smooth ramp and allowed to roll
downward. How does the total mechanical energy of the ball before it is
released compare to its total mechanical energy at the bottom of the ramp?
Assume there is no friction.
Answer:
These are all the forces acting on the ball: friction, gravity, and a normal force.
Explanation:
At the middle of the ramp their will be potential energy associated with the ball and the total mechanical energy will be equal to its potential energy . At the bottom of the ramp their will be kinetic energy associated with the ball and total mechanical energy will be equal to its kinetic energy .
What is mechanical energy ?Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.
Total mechanical energy = potential energy + kinetic energy
When ball is positioned in the middle of the ramp , the ball is at rest , which implies that total mechanical energy is equal to potential energy possessed by the ball and their is no kinetic energy at that instant of time , after that it came under the action of forces due to which it rolls down and its potential energy starts converting into kinetic energy and the total mechanical energy will be the sum of potential as well as kinetic energy and when it reaches at the bottom of the ramp the total mechanical energy will be kinetic energy of the ball.
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What does NOT experience gravity?
Answer:
Astronauts who are orbiting the Earth often experience sensations of weightlessness. These sensations experienced by orbiting astronauts are the same sensations experienced by anyone who has been temporarily suspended above the seat on an amusement park ride. Not only are the sensations the same (for astronauts and roller coaster riders), but the causes of those sensations of weightlessness are also the same. Unfortunately however, many people have difficulty understanding the causes of weightlessness.
The diagram below shows a pendulum in motion.
At what point(s) does the pendulum possess the least potential energy?
A. Points 1, 3, and 5 only
B. Points 2 and 4 only
C. Points 1 and 5 only
D. Point 3 only
Answer:
Potential Energy is given as:
P.E = mgh
which means P.E is directly proportional to height 'h'.
Kinetic Energy is given as:
K.E = (1/2)mv²
which means K.E is directly proportional to velocity 'v²'.
Total Energy of Pendulum = K.E + P.E
1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.
2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.
3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.
4. The pendulum has the least potential energy at the mean position because the height is minimum.
A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.Potential Energy is given as:
P.E = mgh
which means P.E is directly proportional to height 'h'.
Kinetic Energy is given as:
K.E = (1/2)mv²
which means K.E is directly proportional to velocity 'v²'.
Total Energy of Pendulum = K.E + P.E
1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.
2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.
3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.
4. The pendulum has the least potential energy at the mean position because the height is minimum.
A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.Potential Energy is given as:
P.E = mgh
which means P.E is directly proportional to height 'h'.
Kinetic Energy is given as:
K.E = (1/2)mv²
which means K.E is directly proportional to velocity 'v²'.
Total Energy of Pendulum = K.E + P.E
1. The pendulum has the most potential energy at extreme position because the height is maximum at the extreme position.
2. The pendulum has the least kinetic energy at extreme position because the velocity is zero at extreme position.
3. The pendulum has most kinetic energy at the mean position because the velocity is maximum at this point.
4. The pendulum has the least potential energy at the mean position because the height is minimum.
A rule to remember: The point where K.E is maximum, P.E is zero at this point and vice versa.
Explanation:
