Answer:
The long term cost and benefit of renewable resources is that it is most likely a one-time purchase kind of thing. For example, if you use solar energy, you only have to buy the solar panels for your roof once. However, if you use gas oil to cook, you have to keep buying since it runs out. Sunlight doesn't run out.
The long term cost and benefit of non renewable resources is that it is something you can profit off of very easily. It will take a lot of time for people to completely switch over to renewable resources, so it is something that can steadily bring in money. Examples of non renewable resources that people constantly use is oil, gas, coal, etc.
A 6m crowbar is used to lift 500 N load up to 4 m height hanging at one end of it by pressing
the bar with 400 N effort up to the depth of 6 m at the other end, then calculate
(1) Input work.
(ii) Output work, and
(ii) Efficiency of the machine
Answer:
Work = force • distance
so (input) 400 • 6 = 2400 joules.
and (output) 500 • 4 = 2000 joules
and efficiency = output energy ÷ input energy
so 2000 ÷ 2400 = 83%
input energy = 2400 joules
output energy = 2000 joules
efficiency = 83%
What are the similarities of gravity and air resistance?
Answer: Gravity or Air Resistance. As you saw and read on the previous screens, the force of gravity causes an object to accelerate toward the ground. However, the force of air resistance counteracts gravity and affects how fast an object falls. In this activity, you will compare the forces of gravity and air resistance.
Explanation:
Question 1
Sue traveled 2.3 km on her bike and it took her 5.78 minutes go bike that distance.
What was her velocity in units of km/min ?
Heat is distributed through the atmosphere by winds
True
False
Answer:
True!
Explanation:
Hope this helps!
How will you determine the volume of a cuboid ? Write the formula you will use.
An engineer must design a runway to accommodate airplanes that must reach a ground speed velocity of 61 m/s before they can take off. These planes are capable of accelerating at a rate of 2.5 m/s2.
a.) How long will it take the planes to reach takeoff speed?
b.)What must be the minimum length of the runway?
a) It will take 24.4 second the planes to reach takeoff speed.
b) The minimum length of the runway must be 744.2 meter.
What is acceleration?Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Given parameters:
Acceleration of the plane: a = 2.5 m/s².
Final speed of the plane: v = 61 m/s.
Initial speed of the plane: u = 0 m/s.
Hence, it will take the planes to reach takeoff speed = final speed/acceleration
= 61 m/s / 2.5 m/s²
= 24.4 second.
The minimum length of the runway must be = (final speed)²/(2×acceleration)
= ( 61)²/(2×2.5) meters
= 744.2 meter.
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i been answering all your qustions but noone can help me ? crazy but can someone pls help me its due today ill give alott of points if u help
01.07 Motion Discussion-Based Assessment
Review the topics listed from the lesson.
Arrange to complete the discussion-based assessment with your instructor.
Submit the date and time you spoke with your instructor for the 01.07 Motion Discussion-Based Assessment.
Answer:
Do you have a picture of your work?, Maybe i could help with it if you did.
Answer:
Hi, can you send the list of topics? I'd be happy to help you review. Also, did you meet with your instructor to complete the discussion-based assessment?
Explanation:
A marine weather station detects waves which are 15 meters long and 2.4 meters high and travel a distance of 75.0 meters in 30 seconds. Determine the amplitude, the speed, the period and the frequency of these waves.
For a detected wave that is 15 meters long and 2.4 meters high and travel a distance of 75.0 meters in 30 seconds, the amplitude, speed, period, and frequency is mathematically given as
V=2.0m/s
A=1.2m
f=0.13Hz
T=7.5sec
What is the amplitude, speed, period, and frequency of these waves.?The amplitude of the wave is the distance from the middle to the crest or through
Hence
Amplitude=wave height/2
A=2.4/2
A=1.2m
Generally, the equation for the speed is mathematically given as
V=d/t
V=75/30
V=2.0m/s
Period time to complete one oscillation or length.
T=d/v
T=15/2
T=7.5sec
Frequency
f=1/T
f=0.13Hz
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How to find kinetic energy with force, mass, and distance
Answer:
Explanation:
Set the equations for work and kinetic energy equal to each other. Work equals force times distance and kinetic energy equals one-half the mass of the object times its velocity squared, so F_d = (m_ ÷ _2)_v2. Substitute the measurements for force, distance and mass into the equation.
The energy an object has as a result of motion is known as kinetic energy.
What is Kinetic energy?A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force.
After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transferred and is dependent on the mass and speed attained.
The square of the object's velocity determines the kinetic energy. In other words, when an object's velocity twice, its kinetic energy quadruples.
Therefore, The energy an object has as a result of motion is known as kinetic energy.
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The focal length of a converging lens is the distance.
The distance from the lens to the focal point is called the focal length.
What is a converging lens?Converging lenses, commonly referred to as convex lenses, have thicker centers and narrower upper and lower margins. The edges are outwardly curled. This lens has the ability to concentrate a beam of parallel light rays coming from the outside onto a spot on the opposite side of the lens. Convex lenses come in three different varieties, each with a unique structure.Convex mirrors are used in a car's side wing mirrors and rearview mirrors. This is so that the driver can see a wider area than the average person because of the distorted image that is created. aids the driver in keeping a closer eye on the road and vehicles in the back.Due to the greater field of view, it provides than usual, it is also utilized in driving mirrors and store security mirrors. Using blind corner mirrors to see around blind corners on the road is advantageous. By being able to see the traffic around tight turns, it improves road safety.To learn more about converging lens, refer to
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Hector is walking his dog (Fido) around the neighborhood. Upon arriving at
Fidella's house (a friend of Fido's), Fido turns part mule and refuses to continue
on the walk. Hector yanks on the chain with a 67.0 N force at an angle of 30.0°
above the horizontal. Determine the horizontal and vertical components of the
tension force.
If Hector yanks on the chain with a 67.0 N force at an angle of 30.0°
above the horizontal, the horizontal and vertical components of the
tension force. is mathematically given as
Fx=58NFy=33.5NWhat are the horizontal and vertical components of the tension force?Generally, the equation for the coplanar forces is mathematically given as
For x axis
Fx=67cos30
Fx=58N
For y axis
Fy=67sin30
Fy=33.5N
In conclusion, The horizontal and vertical components
Fx=58N
Fy=33.5N
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Is the answer I provided correct
Answer:
yea, force is mass x acceleration
What is kinetic energy? (99 points)
A.thermal energy
B.the energy of radiation
C.stored energy
D.the energy of motion
Answer:
its D
Explanation:
The kinetic energy is the energy of motion.
What is kinetic energy?
The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.
An item in motion has energy, which is called kinetic energy. Motion in space, you walking down the street, and the rotation of the planet around the sun are all examples of kinetic energy. Kinetic energy has the following formula: K.E. = 1/2 m*v², where m is the object's mass and v is its square velocity.
Any object in motion is using kinetic energy, so the energy of motion is
kinetic energy.
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Two rams run toward each other. One ram has a mass of 49 kg and runs west
with a speed of 7 m/s, while the other has a mass of 52 kg and runs east with
a speed of 9 m/s. What will the momentum of the system made up of the two
rams be after they collide? Assume the total momentum of the system is
conserved.
A. 125 kg-m/s west
B. 125 kg-m/s east
C. 811 kg m/s west
D. 811 kg-m/s east
Answer:
D. 125 kg-m/s east
Explanation:
N
W E
S
momentum of box moving east: 52 * 9 = 468 kg-m/s east
momentum of box moving west: 49 * 7 = 343 kg-m/s west
so finally moving towards, 468 - 343 = 125 kg-m/s east
Kinetic energy is the energy that an object possesses due to its ____ and potential energy is the energy that an object possesses due to its ____.
Answer: Kinetic energy is the energy that an object possesses due to its motion and potential energy is the energy that an object possesses due to its position
Explanation:
Kinetic energy is the energy that a body or item has as a result of its motion.
Example: A ball that starts rolling down a hill has kinetic energy because of its motion.
Potential energy is known as the energy that an object has as a result of its position.
Example: A drawn bow can store energy because of its position.
An Indy car racer traveling at 15.0 meters per second slows as he makes a pit stop. If he decelerates at 2.5 meters per second squared, he was
away from the pit when he started braking.
meters
Answer:
x = 45 [m]
Explanation:
To solve this problem we must use the following kinematics equation:
[tex]v_{f}^{2} = v_{i}^{2}-(2*a*x)[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 15 [m/s]
a = desacceleration = 2.5 [m/s^2]
x = distance [m]
Note: the negative sign in the equation above, is because the car slows down.
0^2 = 15^2 - (2*2.5*x)
2*2.5*x = 15^2
x = 45 [m]
this is a physics question please help
Answer:
mass×Velocity
Explanation:
b/c when we want to get KE =one over two mass times velocity square
In a summer storm, the wind is blowing at a velocity of 8 m/s north. Suddenly in 3 seconds, the winds velocity is 23 m/s north. What is the winds acceleration?
Answer:a=v-u/t
=23-8/3
=5m/s hope you got your answer
Explanation:
An ultra-low friction pulley deal is as shown. The two weights experience an acceleration of 3.8m/s2. The first weight has 1.08kg. Find the mass of the second weight
Answer:
The mass of the second weight is approximately 0.477 kg
Explanation:
The given parameters are;
The acceleration experienced by the two weights = 3.8 m/s²
The mass of the first weight = 1.08 kg
The formula for the acceleration, a, of weights attached to a friction pulley, is given as follows;
[tex]a = \dfrac{g \cdot (M - m)}{M + m}[/tex]
Where;
a = The common acceleration of the two weights
g = The acceleration due to gravity = 9.81 m/s²
M = The mass of the first weight = 1.08 kg
m = The mass of the second weight
Therefore, we have;
[tex]m = \dfrac{M\cdot (g -a )}{g + a} = \dfrac{1.08\times (9.81 -3.8 )}{9.81 + 3.8} \approx 0.477[/tex]
The mass of the second weight = m ≈ 0.477 kg
The mass of the second weight ≈ 0.477 kg.
please answer my question :)
Answer:
Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.
A device has a resistance of 11 Ω and a current of 12 A. What is it power and potential difference?
Answer:
The potential difference is 132 volt
And the Power is 1584 watt
Explanation:
Given :
Reresistance = 11 Ω
current = 12 A
The Potential difference = IR
V= IR
=> V = 11×12
=> V = 132v
Now ,
Power = VI
=> P = 132×12
=> P = 1584 w
Question :-
A Device has a Resistance of 11 Ohm and a Current of 12 Ampere . What is it Power and Potential Difference .Answer :-
Power of the Device is 1584 Watt .Potential Difference is 132 Volt .Explanation :-
As per the provided information in the given question, we have been given that the Resistance of the Device is 11 Ohm . Current is given as 12 Ampere . And, we have been asked to calculate the Power and Potential Difference .
➻ Now here, First we will find the Potential Difference of the Device :-
V = I RWhere ,
V denotes to the P.DI denotes to the CurrentR denotes to the ResistanceTherefore, by Substituting the given values in the above Formula :-
⇒ P.D = Current × Resistance
⇒ P.D = 11 × 12
⇒ P.D = 132 Volt
Hence ,
Potential Difference is 132 Volt .[tex] \: \: \: \: \: \: \: \rule{150pt} {0.5pt} [/tex]
➻ Now here, we will find the Power :-
P = V IWhere ,
P denotes to the PowerV denotes to the P.DI denotes to the CurrentTherefore, by Substituting the given values in the above Formula :-
⇒ Power = P.D × Current
⇒ Power = 132 × 12
⇒ Power = 1584 Watt
Hence ,
Power of the Device is 1584 Watt .[tex] \underline {\rule{90pt} {4pt}} \: \underline {\rule{90pt} {4pt}} [/tex]
Note :-
In the above Answer , kindly refer that P.D denotes to the Potential Difference .Two boxes of textbooks, of masses 10 kg and 15 kg, are connected by a lightweight string, and then pulled across a horizontal table by a horizontal applied force, as shown in the diagram above (attached to question).
The applied force has a magnitude of 50 N, and there is no friction between the boxes and table. What is the acceleration of the 10 kg 10 kg box?
A.) 3.3 m/s^2
B.) 2.0 m/s^2
C.) 5.0 m/s^2
D.) The box will not accelerate because the tension force acting on it to the left must also be 50 N 50 N.
Answer:
The correct option is;
B.) 2.0 m/s²
Explanation:
The given information are;
The masses of the boxes are; m₁ = 15 kg and m₂ = 10 kg
The force applied, F = 50 N
The friction force between the blocks and the table = N/A
The equation for the applied force, F = Mass, m × Acceleration, a
Therefore;
a = F/m
Given that the two boxes are attached to each other and to the force by a spring, they will experience the same motion, and therefore, the same acceleration
The total mass (the two blocks) pulled by the applied, 50 N force, [tex]m_T[/tex] = m₁ + m₂ = 10 kg + 15 kg = 25 kg
The acceleration given the blocks by the applied force, a = F/[tex]m_T[/tex] = 50 N/(25 kg) = 50 kg·m/s²/(25 kg) = 2 m/s²
The acceleration experienced by the 10 kg box = The acceleration experienced by the system of the two boxes = 2 m/s².
What is a metal?????????
Answer:
A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable (they can be hammered into thin sheets) or ductile (can be drawn into wires). A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride.
Use one letter for each letter. Please I need help
Answer:
A. Battery
B. Switch
C. Element
D. Wire
Explanation:
I'm not completely positive.
Answer:
A:Battery B:Resistor C:Element D:wire
Explanation:
A person on a tricycle travels a distance of 45km in 6.1 hrs, what was the speed of the person on the tricycle?
Answer:
7.37 km per hour
Explanation:
Divide km buy hours
Answer: 7.377 Km/h
Explanation:
What you want to do is 45 divided by 6.1. And you will get your answer.
The largest single entity in the universe is a black hole.
True
False
Select the correct answer.
What happens to the acceleration of an object if the net force on it increases?
ОА. .
The acceleration increases.
OB.
The acceleration decreases.
Ос.
The acceleration becomes zero.
OD
The acceleration remains the same.
Answer:
A
Explanation:
According to Newton's second law, acceleration is directly proportional to the net force. As the acceleration increases (when mass is constant), the net force increases. This is represented in the following formula.
[tex]f = ma[/tex]
[tex]a = \frac{f}{m} [/tex]
a = acceleration
f = force
m = mass
What is the difference between regular electricity and static electricity
2. A car travels 100 km due East in 2 hours. It then travels 50 km South in 1 hour. What is its average velocity?
Answer: The average velocity of the car is 37.27 km/h.
Explanation:
Answer:
Solution
100 km into m/s= 55.4 m/s
59 km into m/s = 13.8m/s
Average velocity= v+u/2
=69.2/2
= 34.6
I think it's average velocity is 35.6
I think it will help
A scientist recorded the number of geese found in a park on various days of this week. The data is shown below.
14, 12, 19, 20, 21, 13, 18
What is the range of this data?