Answer:
Total mechanical energy = 225 J
Explanation:
Given:
Mass of duck (m) = 2 kg
Speed of duck (v)= 5 m/s
Height of duck from ground (h) = 10 m
Gravitation acceleration (g) = 10 m/s²
Find:
Total mechanical energy
Computation:
Total mechanical energy = Kinetic energy + Potential energy
Total mechanical energy = (1/2)mv² + mgh
Total mechanical energy = (1/2)(2)(5)² + (2)(10)(10)
Total mechanical energy = 25 + 200
Total mechanical energy = 225 J
2. Why do you think a light stick would be a good
light source around flammable materials?
Answer:
the wood for the stick is less dense so it would be easy to light on fire and maintain a fire on it, unlike a wood log witch will take a larger activation energy to have a fire last on it for a period of time.
How much force is needed to accelerate a 70 kg rider and her 200 kg
motor scooter at 4 m/s/s? (Include measurement label) *
Answer: f= mass×acceleration
They said t1he scooter so 200× 4
=800N
Explanation:
I am not that sure
The athlet at point A runs 150m east, then 70m west and then 100 east
Determine the resultant displacement of the athlete relative to point A
Answer:
180m to the east
Explanation:
Displacement is the distance traveled in a specific direction. It is a vector quantity with both magnitude and direction. Therefore, the start and finish position is very paramount.
point A runs 150m east,
70m west
100m east
150m
--------------------------------------------------------→
70m
←---------------------
100m
-----------------------------------→
The displacement of the athlete = 150 - 80 + 100 = 180m to the east
Calculate the net force being applied to the objects. Include SIZE and DIRECTION.
10 N
SN
2 N
Describe some things that Ye-Jun could do each day to increase the healthiness of his lifestyle.
Answer:
Eat more healthy foods and keep more active.
Explanation:
A 58 kg counterweight on a trebuchet is raised to a height of 3.1 meters. Calculate how much potential energy it has
Answer:
1762.04J
Explanation:
Given parameters:
Mass of counterweight = 58kg
Height = 3.1m
Unknown:
Amount of potential energy = ?
Solution:
The potential energy of a body is the energy due to the position of the body.
It is given as:
Potential energy = mass x acceleration due to gravity x height
So;
Potential energy = 58 x 9.8 x 3.1 = 1762.04J
The more energy, the hotter the object. And the shorter the wave
length the more energy there is.
True
False
Help me plssss!!
Answer:
that is true
Explanation:
Answer:
True.
Explanation:
Energy can be given off by heat, a lot of heat can be a sign of a lot of energy. And a shorter wavelength the more energy, which I've learned in school.
hello I wanna know what is the Newton first is also called the law
Answer:
What is another name for the first law of motion? Why is it given that name? Law of inertia. Page 2. It is given that name because inertia is the tendency of an object to resist any change in its motion until an unbalanced force acts on it.
Explanation:
II. What examples can you find in your home that are examples of kinetic and potential energy (name two for each type
of energy)?
11. Kinetic:
12. Kinetic:
13. Potential
14. Potential:
Answer:
11. A door accelerating when pushing it.
12. A person sliding along the floor.
13. Water dropping from the faucet.
14. Courtains descending when loosening them.
Explanation:
For kinetic energy, any example that does not move horizontally will do. Something accelerating or decelerating is a good example (Ek=1/2mv^2, where v is velocity).
For potential energy try to think of things moving vertically. Potential energy comes from the height of an object (Ep=mgh, where h is height).
Notice that example 13 and 14 represent potential energy turning into kinetic energy, height becomes lower, so velocity increases.
Which situation would result in interference?
a wave bouncing off an object
a wave bending as it moves through an object
a wave scattering as it moves through an object
a wave increasing in energy as it hits another wave
Answer:
Answer is a wave increasing in energy as it hits another wave.
Explanation:
I hope it's helpful!
Answer:
D - A wave increasing in energy as it hits another wave
Explanation:
Find the mass and show all the work please and show the answer. Thank you.
Answer:
75 kg.
Explanation:
From the question given above, the following data were obtained:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
Kinetic energy (KE), mass (m) and velocity (v) of an object are related according to the following equation:
KE = ½mv²
With the above formula, we can obtain the mass of the object as illustrated below:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
KE = ½mv²
937.5 = ½ × m × 5²
937.5 = ½ × m × 25
937.5 = m × 12.5
Divide both side by 12.5
m = 937.5 / 12.5
m = 75 Kg
Therefore, the mass of the object is 75 Kg.
What acceleration is produced by a force of 250 N acting on a mas
25 kg?
Answer:
10m/s2
Explanation:
f=ma
f/m= a
or,250/25=a
or,10 = a
therfore, acceleration is produced 10m/s2
What was the long-term effect of the Northwest Ordinance of 1787?
Answer:
Established a government for the Northwest Territory, outlined the process for admitting a new state to the Union, and guaranteed that newly created states would be equal to the original thirteen states
Explanation:
Goooogle, so I hope this helps somewhat
Also, isn't this a History question? You put physics lol
A wave with a frequency of 56 Hz has a wavelength of 27 meters. At what speed will this wave travel?
HELP PLS 100 POINTS TAKING TEST RN
WHEN you look at the speedometer in a moving car, you can see the car's.
A.instantaneous speed.
B.average speed.
C.instantaneous acceleration.
D.average acceleration.
E.average distance traveled.?
Answer:
I think he answer is C but I could be wrong
Explanation:
brainliest plz
Answer:
d mark brainlyest
Explanation:
Jesús sketched models of two different neutral isotopes of sodium. If the
isotope models are accurate, which statement might be true? (Refer to the
periodic table if necessary.)
O A. One shows 11 protons, and one shows 12.
O B. One shows 11 neutrons, and one shows 12.
C. One shows 11 electrons, and one shows 12.
O D. One shows 10 protons, and one shows 12.
Answer :
O B. One shows 11 neutrons, and one shows 12.
is correct
I just took the quiz <3
If the isotope models are accurate, one will show 11 neutrons, and one will show 12.
What are isotopes?Isotopes are two or more types of atoms that have the same atomic number but different mass numbers.
Based on the models of two different neutral isotopes of sodium sketched by Jesus, we can conclude the following about isotopes of sodium;
One of the isotope shows 11 neutrons, and the one shows 12.
Learn more about isotopes here: https://brainly.com/question/14220416
#SPJ2
f. It is easier to pull a lawn roller than to push it, why?
Answer:
because you use more force to push than to pull (well it depends how heavy it is)
Explanation:
Cell with structures labeled A, B, and C
Cell with structures labeled A, B, and C
What structure represents a chloroplast in the cell?
In 2010, scientists obtained an image of an asteroid that was dangerously close to Earth. Which technology did the scientists likely use to capture the image?
GPS, because it uses satellites that provide position and velocity data
radio telescope, because it captures radio waves from space
MRI, because it uses magnets to produce a picture
submarine communication, because it uses LF radio waves
Answer:
radio telescope, because it captures radio waves from space
Explanation:
The technology the scientists used to capture the image is likely to be a radio telescope. This telescope is able to produce images from electrical signals transmitted by the radio waves the trail of the asteroid generates.
Telescope are used to study very far and distant bodies. So, due to their special design, it is the best instrument to use for this kind of study. The radio telescope picks radio waves produced from astronomical bodies in space.Answer:
radio telescope, because it captures radio waves from space
Explanation:
Edge 2021
A pontoon boat travels across a lake in a straight line and increases in speed uniformly from vi = 18.5 m/s to vf = 36.0 m/s in a displacement Δx of 250 m. We wish to find the time interval required for the boat to move through this displacement. g
(a) Draw a coordinate system for this situation.
(b) What
analysis model is most appropriate for describing this situation?
(c) From the analysis model, what equation is most
appropriate for finding the acceleration of the speedboat?
(d) Solve the equation selected in part (c) symbolically for
the boat’s acceleration in terms of vi , vf , and ?x. (e) Substitute
numerical values to obtain the acceleration numerically.
(f) Find the time interval mentioned above.
Answer:
Explanation:
a ) The motion is one dimensional , so motion is along x - axis , starting from origin ( 0 , 0 )
b ) Initial velocity is 18.5 m /s when boat is situated at origin . When he displaces by 250 m along x axis and his position is ( 250 , 0 ) along x axis , his velocity becomes 36 m /s . Both his velocity and acceleration is along x - axis.
c ) Initial velocity vi = 18.5 m /s
final velocity vf = 36 m/s
Displacement x = 250 m
Acceleration a = ?
Most appropriate formula is given below .
vf² = vi² + 2 a x
2ax = vf² - vi²
x = ( vf² - vi² ) / 2 a
d )
Putting the given values
36² - 18.5² / 2 x 250
= 1296 - 342.25 / 500
= 1.9 m /s².
f ) Time interval t = ?
Required formula
vf = vi + at
t = (vf - vi ) / a
Putting the values
t = (30 - 18.5) / 1.9
= 6.05 second .
What effects the amount of lift a plane gets?
Detailed answer pls!!! I will give brainliest!!! 10 pts!!!
Answer:
The airfoil shape and wing size will both affect the amount of lift. The ratio of the wing span to the wing area also affects the amount of lift generated by a wing. ... The lift then depends on the velocity of the air and how the object is inclined to the flow. Air: Lift depends on the mass of the flow.
Please give brainliest!!!
Please Help Me!!!........
Answer:
Hola, veo que quieres la respuesta, así que todo lo que tienes que hacer es traducir esto, EHHHHH me encontraste y la respuesta es un
Explanation:
ps this is a real answer
is newton third law accurate for electric forces?
An object with greater charge will exert a greater force on an object than an object with smaller charge would. However, if you consider two charges that exert a force on each other, regardless of the magnitude of charge, both charges will exert an equal force on each other because of Newton's third law.
Determine the change in velocity between 2.0 to 6.0 seconds. ____
Group of answer choices
-1.6 m/s
-2.1 m/s
-9.5 m/s
Answer:
-2.1 m/seconds velocity
Calculate the velocity of an apple that falls freely from rest and drops for 3.5 seconds.
(brainliest and 100 points)
Answer:
initial velocity(u)=0
time(t)=3.5sec
acceleration (a)=9.8m/s²
final velocity (v)=?
Explanation:
we have
v=u+at=0+9.8×3.5=34.3m/s
Which of the following is not necessary for the creation of fossil fuels?
A. Organic matter
B Heat
C Pressure
D. Wind
The athlete at point A runs 150m east, then 70m west and then 100m east. Determine the resultant displacement of the athlete relative to point A
Answer:
180m to the east
Explanation:
Displacement is the distance traveled in a specific direction. It is a vector quantity with both magnitude and direction. Therefore, the start and finish position is very paramount.
point A runs 150m east,
70m west
100m east
150m
--------------------------------------------------------→
70m
←---------------------
100m
-----------------------------------→
The displacement of the athlete = 150 - 80 + 100 = 180m to the east
According to the question,
Point A runs:
150 m (east)70 m (west)100 m (east)Now,
The displacement will be:
= [tex]150-80+100[/tex]
= [tex]250-80[/tex]
= [tex]170 \ m \ (east)[/tex]
Thus the answer above is correct.
Learn more about displacement here:
https://brainly.com/question/21116279
What is the acceleration of a 19 kg bike pushed with a force of 340 N? F = ma
A) 6460 m/s
B) 18 m/s2
C) 17.6 m/s2
Answer:
C
Explanation:
is it possible for an object to be in motion without any external force applied? justify
A. A person does 5415J of work in 4.5 minutes, how much power, expressed in watts, rounded to the tenths place, was generated?
B. Calculate the potential energy of an object whose mass is 56.90kg when dropped from a height of 2150.cm. Round your answer to the nearest tens place.
C. Calculate the kinetic energy of an object with a mass of 355g moving at a velocity of 7.73 m/s. Round your answer to the nearest tenths place.
D. What is the total energy of a system with KE = 1368 J and a PE = 5782J? Express your answer in kJ.
Answer: I only have the answer for A, but still, the answer is 20.07.
Explanation: Because the number ends in a 15, round to the nearest tenth which is 20. So now the number is 5420. To get the Watts (W) you have to take 5420 and divide it by the time in seconds. 4.5 minutes in seconds is 270, so 5420 divided by 270 equals 20.07. So 20.07 is the answer.