A ball rolls from point A to point B. The total energy of the ball at point A isn’t the same as the sum of its potential energy and kinetic energy at point B. Which statement best explains this situation?
The rolling ball doesn’t follow the law of conservation of energy.
Some of the ball’s energy is transformed to thermal energy.
The rolling ball loses some of its energy because of gravity.
The ball absorbs some of its own potential energy.
Answer:
option b
Explanation:
because the law of conservation
it means that energy can never created nor be destroyed
even it will change into another form if energy
Answer: B
Explanation:
what is ohms law of a resistor?
Answer:
La Ley de Ohm muestra la relación que existe entre una resistencia, la tensión o voltaje en sus terminales y la corriente que pasa a través de ella.
Explanation:
14. Which of the following ideas is NOT a part of cell theory?
A. There are only plant and animal cells
B. All living things contain at least one cell
C. Cells come from other cells of the same kind
D. Cells are the basic unit of structure and function of living things
Cell theory states that all living things contain at least one cell, and there are certainly more types of living things than simply plants and animals. For example bacteria and fungi.
So your answer would be A.
Answer: C
Explanation:
all the other ones are part of the cell theory
A child riding a bike has a total mass of 60kg. What is the momentum of the child-bike system if the child rides a distance of 200 m in 5 seconds at a constant speed?
Answer:
Momentum = 2,400 Pa
Explanation:
Given:
Total mass = 60 kg
Distance travel = 200 m
Time = 5 sec
Find:
Momentum
Computation:
Velocity = Distance / time
Velocity = 200 / 5
Velocity = 40 m/s
Momentum = Mass x Velocity
Momentum = 60 x 40
Momentum = 2,400 Pa
Yass QUEEN. What is the relationship between Pressure, Area, and Force?
Answer:
pressure=force/area is therelationship between Pressure, Area, and Force.
a wall is painted yellow with yellow paint. explain why the paint makes the wall look yellow
How
did the solar system begin? ( use complete sentences ) will mark b
why does flowing water from waterfall seems to look white in colour?
Answer:
Explanation:
it seems white because once it falls or hits the bottom bubbles are created and it makes it look white
Answer:
However, when water flows rapidly, its flow becomes turbulent. This sort of aeration creates tons of small bubbles in water, which are eventually responsible for the white color of waterfalls.
What is the root cause of earths magnetic field?
Answer:
I'm not sure but I think it is electric currents in the outer core
what equation describes these relationships?
1. (-3,-9), (-2,-6), (-1,-3), (0,0)
2. (3,0), (2,-1), (1,-2), (0,-3)
3. (0,0), (1,-3), (2,-6), (3,-9)
a. y=3x
b. y=-3x
c. y=x-3
Hi people; there's a question that has been so confusing for me and a friend of mine.
0°C + 0°C = 64°F
Is this correct or wrong?
Answer:
The correct answer is: 0°C + 0°C = 32°F
Explanation:
We need to remember the conversion equation from Celsius to Fahrenheit:
[tex]y^{\circ}F=(x^{\circ}C * \frac{9}{5})+32[/tex]
In our case x = 0, then y will be:
[tex](0^{\circ}C * \frac{9}{5})+32=32[/tex]
[tex]y=32^{\circ}F[/tex]
Now 0°C + 0°C is just 0°C because if we add a body at a certain temperature to another body with the same temperature the total temperature will the same.
Then, knowing that 0°C = 32°F we can conclude that:
[tex]0^{\circ}C+0^{\circ}C=32^{\circ}F[/tex]
I hope it helps you!
Which way do the trade winds usually blow in the Pacific Ocean
Answer:
Hey mate.....
Explanation:
This is ur answer......
Winds and currents in the Pacific flow predominantly from East to West. Above the equator Pacific Ocean trade winds blow from the northeast. Below the equator they blow from the southeast.
Hope it helps!
mark me brainliest plz.....
Follow me! :)
ILL MARK BRAINLIEST
PLEASE HELP
2.Write the formula associating energy with power
Answer:
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
Explanation:
Sub to Beast_Building on yt
a boy situated from A took 80 seconds to reach C through B
it so what is the distance travelled by the boy
240 seconds
Explanation:
If he walked to A and took 80 Seconds it should be the same amount of distance to B and C
A box weighing 100 newtons is pushed up an inclined plane that is 5 meters long. It takes a force of 75 newtons to push it to the top, which has a length of 3 meters.
Answer:
80%.
Explanation:
Question didn't state what is being looked for, but then....
Weight of the box, w = 100 N.
Length of the plane, L = 5 m
Force used, = 75 N
Length pushed through, = 3 m
Looking at the stated parameters, the first thing that comes to mind is to look or calculate for the efficiency of the machine.
Tha efficiency can be gotten by using the relation
Change in energy divided by work done. This is gotten by saying
(100 * 3) / (5 * 75) =
300/ 375 = 0.8
Therefore, the efficiency of the machine has been calculated to be 80% or 0.8
What is the gravitational force between two 15-kg packages that are 0.35 cm apart?
Answer:
u wanna play some blox?
Explanation:
A satellite orbits around a planet with a mass of 3.0x10^23kg . If the satellite is 3.0x10^8m from the planet's center, what is the velocity of the satellite as it orbits in a circle around the planet?
Answer:
dyffuosuzfuufoxuusouuofdofusuddsudzufuxfusfdfdfudfuodruodoodoyudfoudoduofuodoufdfoyfyoffyoyofufyfo
You wake up in the morning and get out of bed. Does the floor feel cold or warm on your bare feet? On the lines below, write a sentence that compares how it feels to step on a bare floor and on a rug on a cold morning
When you get out of bed in a morning it's most likely too be cold so your bare feet on a floor not carpet a bare floor will feel cold since the temperature and molecules had changed and if you step on a warm fuzzy rug it will feel warm since your feet are cold and the rugs fuzziness or material keeps you warn
We feel more cold on feet on morning because heat from our feet will flow to the cold floor. We feel more cold on the bare floor than the rug since it conducts heat away from our feet.
What is heat transfer?Heat will be transfer on a temperature gradient from one substance to the other. Heat is transferring from the hot body to the colder body. There are three types of heat transfer are there namely, conduction, convection and radiation.
Conduction is the heat transfer in solids , convection in liquids and radiation is the heat or energy transfer mode in gases and vacuum. At the morning, the floor will be more cool whereas our body will be hotter, thus heat will flow our body to floor make our feet cool.
A bare floor will conduct thermally more than a rug do. Thus the bare floor conducts heat away from our feet and make our feet more cool.
To find more on heat transfer, refer here:
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analyse the extent to which the media portrays unhealthy body images and discuss how this may affect individuals
Richard Julius once made a model plane that could travel a max speed of 110 m/s. Suppose the plane was held in a circular path by a control line. Suppose the plane ran out of gas while moving at its maximum speed and Richard Julius pulled the line in to bring the plane home while it continued in a circular path. If the line's initial length is 120 m and Richard Julius shortened the line by 0.80 m every second, what was the plane's speed after 33.0 s?
Answer:
85.8 m/s
Explanation:
We know that the length of the circular path, L the plane travels is
L = rθ where r = radius of path and θ = angle covered
Now,its speed , v = dL/dt = drθ/dt = rdθ/dt + θdr/dt
where dθ/dt = ω = angular speed = v'/r where v' = maximum speed of plane and r = radius of circular path
Now, from θ = θ₀ + ωt where θ₀ = 0 rad, ω = angular speed and t = time,
θ = θ₀ + ωt = 0 + ωt = ωt
So, v = rdθ/dt + θdr/dt
v = rω + ωtdr/dt
v = (r + tdr/dt)ω
v = (r + tdr/dt)v'/r
v = v' + tv'/r(dr/dt)
v = v'[1 + t(dr/dt)/r]
Given that v' = 110 m/s, t = 33.0s, r = 120 m and dr/dt = rate at which line is shortened = -0.80 m/s (negative since it is decreasing)
So, v = 110 m/s[1 + 33.0 s(-0.80 m/s)/120 m]
v = 110 m/s[1 + 11.0 s(-0.80 m/s)/40 m]
v = 110 m/s[1 + 11.0 s(-0.02/s)]
v = 110 m/s[1 - 0.22]
v = 110 m/s(0.78)
v = 85.8 m/s
Which of the following would have the most momentum?
A. A train traveling 60 miles per hour.
B. A motorcycle traveling 60 miles per hour.
C. A car traveling at 60 miles per hour.
D. A basketball traveling 60 miles per hour.
Answer:
A. A train traveling 60 miles per hour.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
This ultimately implies that, the mass of an object or body is directly proportional to its momentum. Thus, the higher the mass of an object or body, the greater would be its momentum and vice-versa.
Hence, a train traveling 60 miles per hour would have the most momentum because it has the greatest mass among the other objects (options).
A wagon with an initial velocity of 2 m/s and a mass of 60 kg, gets a push with 150 joules of
force. Apply your scientific knowledge and understanding of work-energy theorem to calculate
the wagon's final velocity.
Answer:
v_f = 3 m/s
Explanation:
From work energy theorem;
W = K_f - K_i
Where;
K_f is final kinetic energy
K_i is initial kinetic energy
W is work done
K_f = ½mv_f²
K_i = ½mv_i²
Where v_f and v_i are final and initial velocities respectively
Thus;
W = ½mv_f² - ½mv_i²
We are given;
W = 150 J
m = 60 kg
v_i = 2 m/s
Thus;
150 = ½×60(v_f² - 2²)
150 = 30(v_f² - 4)
(v_f² - 4) = 150/30
(v_f² - 4) = 5
v_f² = 5 + 4
v_f² = 9
v_f = √9
v_f = 3 m/s
A wire has compasses placed around it and a current is passed through the wire. What happens to the compasses
Answer:
If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected. Since compasses work by pointing along magnetic field lines, this means that there must be a magnetic field near the wire through which the current is flowing
Explanation:
good luck
A sound wave has a frequency of 776 Hz in air and a wavelength of 0.52 m. What is the temperature of the air? Relate the speed of sound in air to temper ature in units of Kelvin, but answer in units of Celsius . Assume the velocity of sound at 0 degrees * C 327 m/s Answer in units of degc.
Answer:
142.7650889
Explanation:
I think the answer above is correct. So to find the velocity of the wave you can do: frequency*wavelength = velocity
in your case, the velocity is equal to 403.5m/s
so we know that the 403.52 is the total velocity of the wave
and the equation: velocity at 0 degrees Celsius * [tex]\sqrt{{T}/{273}}[/tex] where T represents temperature in Kelvins = veloctity
so we set 403.52 = 327*[tex]\sqrt{{T}/{273}}[/tex] and solve for T
T will then equal the degree in Kelvins
so to convert from Kelvins to degrees celsius you subtract 273 from the Kelvins value and you are left with the degrees in Celsius which equals 142.7650889 degrees Celsius
A major contemporary learning view of personality which holds that personality traits result from a
person's learning history and his or her expectations, beliefs and other cognitions.
Answer:
hh
Explanation:
The body of the runner was found in the park one early, hot summer morning. Her body shows rigor in her face, neck, arms, and torso. How long has been dead?
for a long time but has been preserved by ice
True or false question scientists can predict when an earthquake will occur
Answer:
False
Explanation:
Neither the USGS nor any other scientists have ever predicted a major earthquake. USGS scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.
Can someone helpppp plsssss
(this is on motion graphs)
Answer:
Only at point a
Explanation:
If the velocity is greater than zero, than the object must be moving.
an elevator provides 21 000 w of power during a 12 s ride. how much work does the elevator do?
Answer:
W=Px∆T= 21000x12=252.000J
how might have atomic numbers of elements indicate that newly discovered elements would have to have very high atomic numbers
Answer:
The scientists who discovered them will start things off by proposing a name. But it will be down to the International Union of Pure and Applied Chemistry (IUPAC) to approve it.
I'm slow...
Newly discovered elements often occur at the bottom of the groups where they occur in the periodic table hence they must have very high atomic numbers.
In the periodic table, the properties of elements are arranged in increasing order of their atomic numbers according to the modern periodic law. As you move down the group, the atomic numbers of elements continue to increase.
Since the properties of elements are periodic, newly discovered elements often occur at the bottom of the group hence they have very high atomic numbers.
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