Answers
Answer:
The first one: 240 meters
The second one: 960 meters
Explanation:
Related Questions
What does NOT experience gravity?
Answers
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.
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?
Answers
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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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
Answers
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:
What is resistanance?
Answers
Answer:
Resistance is a measure of the oppostion to flow current in a electrical circuit
Explanation:
I hope it's help u army
A 50,000 kg plane is flying at a constant velocity of 130 m/s. Is the plane in a state of equilibrium
Answers
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
how many times has the u.s. landed astronauts on the moon?
Answers
Answer:
six crewed landings
Explanation:
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)
Answers
That would depend on how much it weighs
Please if someone knows the answer please tell me
Answers
Answer:
i think its electrostatic force
It's not A. Please help.
Answers
Answer:
It represents double composition
Explain how energy changes in the spring toy below when it goes downstairs
Answers
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
Compare and contrast gravitational potential energy and elastic potential energy?
Answers
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.
In elementary school, 40% of girls and 25% of boys are unhappy with the shapes of their bodies. OA. True O B. False
Answers
Jshshshdhddhdhje
A car starting from rest accelerates at a rate of 8m/s what is the final speed at the end of 4 seconds?
Answers
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 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.
Answers
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.
learn more about mechanical energy
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1. State Newton's 3 laws of motion in your own words.
Answers
1st law INERTIA
2nd law (Force = mass x acceleration)
3rd law (all actions have opposite reaction)
What is the relationship between kinetic energy and changing states of matter?
Answers
Answer:
The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in. This in turn determines whether the substance exists in the solid, liquid, or gaseous state.
what two factors affect how much gravitational potential energy an object-earth system has?
Answers
Answer:
height and mass
Explanation:
gpe = mass x height x gravitational field strength
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.
Answers
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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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
Answers
Why type of energy is present after a solar panel changes forms?
Answers
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.
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
Answers
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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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.
Answers
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:
What is the smallest possible wavelength of light?
Answers
Explanation:
Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum.
A 76-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of the rope is 19 m and its cross-section area is 1.6 x 10-5 m2. As the skier moves, a resistive force (due to the water) of magnitude 140 N acts on her; this force is directed opposite to her motion. What is the change in length of the rope when the skier has an acceleration whose magnitude is 0.61 m/s2?
Answers
Newton's second law and the definition of Young's modulus allows us to find the change in length in the chord is:
Length change is: ΔL = 5.98cm
Given parameters
Mass of the water skier m = 76 kg Young's modulus of chord Y = 3.7 10⁹ N / m² Chord length Lo = 19 m. The area of the curda is a = 1.6 10-5 m² Friction force with water fr = 140 N. Acceleration a = 0.61 m / s²To find
The change in length of the chord.
Newton's second law says that the net force on a body is directly proportional to its mass and acceleration.
∑ F = m a
where bold letters indicate vectors, F is force, m is mass, and acceleration.
A free-body diagram is a diagram of the forces without the details of the bodies, see attached.
T-fr = m a
T = ma + fr
Let's calculate.
T = 76 0.61 + 140
T = 186.36 N
Yung's modulus is defined by the relationship between stress and strain.
[tex]Y = \frac{\frac{F}{A} }{\frac{\Delta L}{L_o} }[/tex]
[tex]\Delta L = \frac{F}{A} \ \frac{L_o}{Y}[/tex]
Let's calculate.
ΔL = [tex]\frac{186.36}{1.6 \ 10^{-5}} \ \frac{19}{3.7 \ 10^9}[/tex]
ΔL = 5.98 10⁻² m = 5.98 cm
In conclusion using Newton's second law and Young's modulus definition we can find the change in length in the chord is:
Length change is: ΔL = 5.98cm
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Electricity consumption in the United States totaled about ____________ kilowatthours (kWh) in 2015.
Answers
Answer:
3,900
Explanation:
Keeping in mind that not all flasks are vacuum, Please help me explain how other flasks prevent heat loss?
Answers
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.
Answers
Answer:
speed = distance/time
just find the speed if it
please help ! Which of the following objects has the greatest momentum?
Answers
Answer:
maybe the third one....
‼️ 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)?
Answers
0.00004
Explanation:
velocity of electromagnetic waves = 3.0×10^8.
Wavelength=velocity/frequency
(3.0×10^8) (7.5×10^12)
If the absolute temperature of a gas is doubled and the pressure of the gas is doubled, how will the volume change
Answers
Answer: the volume quadruples
Explanation:
