Answer: 89 J
Explanation:
The kinetic energy of the baseball with the given mass and speed is 89.425 Joules.
What is the Kinetic energy of the baseball?Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Mass of the baseball m = 0.146kgVelocity v = 35m/sKinetic energy of the baseball K = ?K = (1/2)mv²
K = (1/2) × 0.146kg × (35m/s)²
K = 0.5 × 0.146kg × 1225m²/s²
K = 89.425kgm²/s²
K = 89.425J
The kinetic energy of the baseball with the given mass and speed is 89.425 Joules.
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A construction crane is on top of a skyscraper which has height 45m. The crane itself is 10m in height. What is the gravitational potential energy in joules of a 60kg worker who is standing on top of the crane? (Use g=9.81 in your calculations)
Answer:
32340J
Explanation:
Given parameters
Height of skyscraper = 45m
Height of crane = 10m
Mass of worker = 60kg
g = 9.81m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is expressed as:
G.P.E = mgh
m is the mass
g is the acceleration due to gravity
h is the height = 45 + 10 = 55m
G.P.E = 60 x 9.8 x 55 = 32340J
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:
9) Suppose it takes a plane 5 hours to travel from Philadelphia to San Francisco. It
travels at an average speed of 500 miles per hour. What is the distance between
the two cities?
Answer:
2500miles
Explanation:
Given parameters:
Time of travel = 5hrs
Average speed = 500miles/hr
Unknown:
Distance between the two cities = ?
Solution:
To solve this problem, we must understand that speed is the distance covered with time.
So;
Distance = speed x time
Distance = 500 x 5 = 2500miles
One degree of longitude at the equator is approximately 111 km. As we move north or south the size of a degree changes. What is the distance that each degree of longitude has at the poles?
ALL of the meridians of longitude converge (come together) at the North and South poles. So at a pole, the distance between different longitudes is ZERO.
if you're standing at the North or South pole, you're located at EVERY longitude, because any other longitude is zero distance from you.
You're also located at NO longitude. Because . . .
==> If you're standing at the North pole and you take one step, it doesn't matter what direction you stepped, you've moved South. All directions from the North pole are South.
==> If you're standing at the South pole and you take one step, it doesn't matter what direction you stepped, you've moved North. All directions from the South pole are North.
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:
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.
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 .
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.
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.
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
If it is 9 am in San Francisco, is it also 9 am in New York? Why or why not?
If it is 9 am in San Francisco, then there will be 12pm in New York. it happens because of spin rotation of our earth.
What is Clock ?A clock or a timepiece is a device used to measure time. The clock is one of the oldest human inventions. It has three hands moves in the circle. one is second hand, which show seconds. Second hand shows hours and third hand which is smaller than other shows hours.
San Francisco, California is 3 hours behind New York. There will be 12pm in New York when it is 9 am in San Francisco. Day and night happens because of our earth is spinning about itself. when we take a football in the dark room and illuminated it by the torch, then one side of the ball gets illuminated and other side of the ball gets dark due to shadow of its own, Same happens with our earth. it this case torch is our sun and earth is our football. The people who are on the darker side they are in the night and who are in the light side they are in the morning.
Morning starts where edge of the light is. Tme changes with lateral distance on the earth. The points which is on same longitude have same time. There is lateral displacement from San Francisco to New York. Therefore there is time lag between them.
Hence there is time lag.
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what type of triangle measures 8 inches,8 inches,3 inches
Answer:
isoceles
Explanation:
Because two sides are equal
Answer:
An Isosceles triangle
Explanation:
An Isosceles triangle is a triangle where AT LEAST two sides are congruent.
How does an electrical field change when it interacts with an opposing field
Answer:
The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. ... If it is moving in the opposite direction it will decelerate. If a negative charge is moving in the same direction as the electric field vector the particle will decelerate.
Q. A runner has a momentum of 670 kg m/s and is traveling at a
velocity of 9 m/s. What is his mass?
Answer:
m = 74.44 kg
Explanation:
p = m × v
670 = m × 9
9m = 670
m = 670/9
m = 74.44 kg
Momentum of an body is defined as the product of mass and velocity.It s unit is kgm/sec.The value of mass will be 74.44 kg.
What is momentum?The measurement of mass in motion is called momentum. Momentum is equal to its mass multiplied by its velocity. Mathematically it is given as;
Momentum = Mass x Velocity
The given data in the problem will be
p is the momentum of runner=670 kgm/sec.
v is the velocity =9m/sec.
m is the mass =?
[tex]\rm p =mv\\\\\rm m =\frac{p}{v} \\\\\rm m =\frac{670}{9} \\\\\rm m =74.44 kg[/tex]
Hence the value of mass will be 74.44 kg.
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which two options are examples of wave refracting?
A. Your image in a mirror
B. Light bending as it travels through glass.
C. A voice echo.
D. An object appearing broken when partly seen through water.
Calculate the net force being applied to the objects. Include SIZE and DIRECTION.
10 N
SN
2 N
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:
A wave with a frequency of 56 Hz has a wavelength of 27 meters. At what speed will this wave travel?
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.
Can some one please explain how to read this and what the answer would be?
Answer:
4 to 5
Explanation:
A boat travels north at a rate of 25.0 kilometers per hour (km/hr) relative to the current of the river. The current of the river moves south at a rate of 10.0 km/hr relative to the ground. What is the rate of motion of the boat relative to the ground?
Answer:yes
Explanation:yes
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
PLEASE HELP I WILL GIVE BRAINLYEST!!
Look at the world map shown below.
The picture shows the world map with a horizontal line labeled 'Equator' running across the middle of the map. A dotted line is shown slightly above the equator and parallel to it. This line is labeled 'Tropic of Cancer'. A dotted line is shown slightly below the equator and parallel to it. This line is labeled 'Tropic of Capricorn'. Florida is labeled on the left just above the Tropic of Cancer and Russia is labeled on the right closer to the north pole.
Public Domain
Which statement accurately describes the distribution of sunlight for the regions labeled? (3 points)
Group of answer choices
Florida has shorter seasons because it is more towards the west of the globe.
Russia has a greater number of longitudinal lines, which causes greater temperature differences.
Florida is situated closer to the Tropic of Cancer, which receives more constant and direct rays of the sun.
Russia is situated closer to the North Pole, which is tilted more towards the sun.
Answer:
Florida is situated closer to the Tropic of Cancer, which receives more constant and direct rays of the sun.
Explanation:
Took the test got it right C
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
pls help its about baseball and energy
(one question)
'^'
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.
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D.
because the time is used up due to irrelevant and unnecessary topics
& Every time your group conducts a meeting, nothing is accomplished
that intervene the discussion.
As the group leader, how will you keep your members focused on the
agenda of the meeting using the restriction strategy?
A. Tell them that they will get kicked out from the group if they will
B. End the meeting immediately as soon
as the group begins to
talk about other things irrelevant to the agenda.
c. Give instructions before the meeting starts to confine and limit
what they can say.
D. Show disappointment.
not cooperate.
Answer:
b because I took the quiz
Find the acceleration of a 600 kg car that experiences an impulse of 18,000 kgm/s in 0.05 seconds.
I need help with this question, i don’t understand it
Answer:
what?
Explanation:
Answer:
600m/s²
Explanation:
Given parameters:
Mass of car = 600kg
Impulse = 18000kgm/s
Time = 0.05s
Unknown:
Acceleration = ?
Solution:
To solve this problem, let us find the force that cause the impact first;
Impulse = Force x time
Force = [tex]\frac{impulse}{time}[/tex] = [tex]\frac{18000}{0.05}[/tex] = 360000N
So;
Force = mass x acceleration
Acceleration = [tex]\frac{Force }{mass}[/tex] = [tex]\frac{360000}{600}[/tex]
Acceleration = 600m/s²
100 PTs HELP PLS MARKING BRANLIST TAKING TEST RN
John is running 4 m/s when he decides to make a final sprint to the finish line. He crosses the finish line 6 seconds later
running 8 m/s. What was his acceleration in the last 6 seconds of the race?
-1.33 m/s2
1.33 m/s2
0.67 m/s2
-0.67 m/s2
Answer:
Explanation:
uhm answer is 6x8 +6+4 divded by the race seconds
Answer:
0.67m/s2
Explanation: