Answer:
I believe it is a transfer of energy from the rubber band to the car
Explanation:
However it could be a transfer of potential energy from the stretched rubber band that is released into kinetic energy into the car. Depends as there is little context to the question.
The total energy of any moving object is conserved which is the sum of the kinetic energy and the potential energy.
What is Kinetic and potential energy?Whenever any object moves with a particular velocity then the energy possed by the object is called the kinetic energy.
The energy possed in the body or any object due to their position with respect to others is called potential energy.
Now if the car is stretched from the rubber band it has attained a certain distance by which it is stretched so this is the potential energy now if he releases the rubber the car will move with the velocity now that potential energy is converted into the kinetic energy.
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Is this right? I think i am but i wanna make sure
The driver of a 1.58 10 kg car is traveling cast at 10 ms and increases its speed to 30 mis east over 15
seconds. What is the initial and final momentum of the body?
Answer:
p₀ = 1.53 10⁴ kgm / s, p_f = 4.74 10⁴ kg m / s
Explanation:
The moment is defined by
p = mv
the initial moment is
p₀ = m v₀
indicate the mass of the car m = 1.58 10³ kg and its initial velocity v₀ = 10 m/s
p₀ = 1.58 10³ 10
p₀ = 1.53 10⁴ kgm / s
the final moment is
indicate that it increases its speed at v = 30 m/s, in a time of t = 15 s
we look for the moment
p_f = m v
p_f = 1.58 10³ 30
p_f = 4.74 10⁴ kg m / s
On Mars, which has 0.38 the gravity of Earth, the acceleration of
a dropped ball will be _ m/s2 and the weight of a 50 kg
basketball player would be
_N.
Answer:
if g on Earth= 9.8m/s²
then g on moon will be 0.38 *9.8=3.7m/s²
Mass of a basketball player is 50kg then the weight will be 50*3.7=186.2N
Pls help
The Q : Look at your recorded results and models for both the man and the boy. How close are the coefficients of friction for the sled on ice for two runs? How confident would you feel about specifying a coefficient of kinetic friction for this sled on this ice surface, based on these results? What other variables might impact this coefficient result?
Newton's second law, kinematics and graphic analysis we can find the results for the questions about the movement of the trine are:
The friction coefficients are man is0.8 and for the boy is0.98, the relationship between them is 0.82 The results are very accurate after the graphical analysis. The wind is a very important factor in the calculations that is not taken into account.Second law of Newton.
Newton's second law establishes a relationship between the net force, the mass and the acceleration of the body. In the attachment we can see a free body diagram which is a schematic of the forces without the details of the bodies.
N-W = 0
fr = ma
where N is the normal, W the weight of the body, fr the friction force, m the mass and a the acceleration
The friction force is a macroscopic representation of the interactions between the two surfaces, it is given by the expression
fr = μ N
where μ is the coefficient of friction between the two surfaces.
We substitute
μ mg = m a
a = μ g
Kinematics and graphic analysis.
Kinematics study the movement of bodies, looking for relationships between position, speed and acceleration.
v= v₀ – at t
In this case they give tables and graphs with the values of time and speed, where we can see that the relationship is a straight line that has as equation
y = ax +b
Where y is the dependent variable, x is the independent variable, a is the slope, and b is the cutoff point.
If we relate the two equations:
The independent variable x → time. The dependent variable y → speed. The cutoff point b → the initial velocity. The slope (a) is:a = mug
μ = [tex]\frac{a}{g}[/tex]
Using linear regression the slope and cutoff point is:
The man.
The slope is a = -0.8 m/s² and the cut-off point b= 4.86 m/s.
Let's calculate the coefficient of friction.
μ = [tex]\frac{0.8}{9.8}[/tex]
μ = 0.082
The child.
The slope is a = -0.98 m/s² and the cut-off point b= 4.72 m/s.
We calculate the coefficient of friction.
μ = [tex]\frac{0.98}{9.8}[/tex]
μ = 0.1
The relationship between the two coefficients of friction is
[tex]\frac{\mu_{man} }{\mu_{boy}} = \frac{0.082}{0.1}[/tex]
[tex]\frac{\mu_{man}}{\mu_{boy}} = 0.82[/tex]
The results are very exact since there are values of several points in the route and the graphical analysis gives the best possible value for all the points.
There are some variables not taken into account, one of the most important is friction with the wind and wind speed.
In conclusion using Newton's second law, kinematics and graphic analysis we can find the results for the questions about the movement of the trine are:
The friction coefficients are man is0.8 and for the boy is0.98, the relationship between them is 0.82 The results are very accurate after the graphical analysis. The wind is a very important factor in the calculations that is not taken into account.
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HELPPPPP!
which of the following is a human action that could lead to decreased amounts of greenhouse gases found in the atmosphere, such as carbon dioxide?
A ) Generating energy by burning coal
B ) Deforestation
C ) Driving automobiles
D ) Planting trees
What is the kinetic energy of a 25kg object moving at a velocity of 2.5 m/s
Answer:
78j
Explanation:
78.125J to be exact
How does a balanced Chemical Equation Satisfy the Law of Conservation of Mass?
A. During a chemical reaction, the total amount of matter stays the same.
b. During a chemical reaction, matter is destroyed.
c. During a Chemical reaction, one ore more new substances formed.
d. During a chemical reaction, the total number of atoms increases.
I need help please, thank you!!!
Answer:
135 mph
because 7+9=16
8 is left
if 7=40
9=50
then 8=45
add 40+50+45mph
=135
An automobile moves on a level horizontal road in a circle of radius 30 m. The coefficient of
friction between tires and road is 0.50. The maximum speed with which this car can round
this curve is????/
Answer:
v = 12.12 m/s
Explanation:
It is given that,
Radius of circle, r = 30 m
The coefficient friction between tires and road is 0.5,
The centripetal force is balanced by the force of friction such that,
v = 12.12 m/s
So, the maximum speed with which this car can round this curve is 12.12 m/s. Hence, this is the required solution.
what is the weight of a 5 kg rock
Answer:
So a 5kg object has a mass of 5kg. The weight you associate with it is only relevant on Earth (under its specific gravity) and in fact really the kilogram-force measurement which is measured in Newtons (5kg x 9.8m/s2 = 49.2N)
Explanation:
What is the force on a 1000 kg elevator that is falling freely at 9.8 m/ sec²?
Answer:
f=m.a 1000*9.8=9800newton
An aircraft flying at a steady velocity of 70 m/s eastwards at a height of 800 m drops a package of supplies. a) Express the initial velocity of the package as a vector
Answer:
Explanation:
If unit vector towards east is represented by i in the present case ,
initial horizontal velocity of aircraft towards east is 70 m /s . The package dropped by the aircraft will also have same velocity while getting separated from the aircraft . Hence its velocity is represented by the vector ,
v = 70 i .
Its vertical velocity of package at that time will be zero so
v = 70 i + 0 j
= 70 i
Initial Velocity can be defined as the velocity at which the motion starts.
Initial Velocity for the package is [tex]70i[/tex].
Given that an aircraft flying at a steady velocity of 70 m/s eastwards at a height of 800 m.
Here we express the steady velocity as [tex]u\;\rm m/s[/tex]. Distance is expressed by [tex]d\;\rm meter[/tex]. Initial Velocity can be expressed as [tex]v\;\rm m/s[/tex].
Initial velocity can be calculated by the formula given below.
[tex]v\;=\;u\;+\;at[/tex]
In the above formula, [tex]a[/tex] is expressed the acceleration and [tex]t[/tex] is expressed the time of the motion.
For the initial velocity, time [tex]t\;=\;0[/tex] because motion starts in the vertical direction. Let us assume that unit vector can be expressed by [tex]i[/tex] and [tex]j[/tex].
Initial velocity formula in vector form is given below.
[tex]v\;=\;ui\;+\;atj[/tex]
By substituting all the values in the above formula, initial velocity is
[tex]v\;=\;ui\;+\;a\times0j\\v\;=\;ui\\v\;=\;70i[/tex]
So the initial velocity of the package is 70[tex]i[/tex].
For more details about the velocity, follow the link given below.
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Name 3 different forces that act on objects on the Earth
Answer:
Applied Force.
Gravitational Force.
Normal Force.
Frictional Force.
Air Resistance Force.
Tension Force.
Spring Force.
Explanation:
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How do the offspring produced by asexual reproduction differ from those produced by sexual reproduction?
А.
Offspring produced by asexual reproduction are bigger.
В.
Offspring produced by asexual reproduction use more energy.
С.
Offspring produced by asexual reproduction are more uniform.
D
Offspring produced by asexual reproduction are produced more slowly.
Answer:
Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents.
Explanation:
dont mind this question
A rocket powered sled is accelerating along a straight, level track with a constant acceleration of magnitude 20 m/s2. By how much will the speed of the sled change in 3.00 seconds
Answer:
the change in speed of the sled after 3.0 s is 60 m/s.
Explanation:
Given;
constant acceleration of the sled, a = 20 m/s²
change in time of motion, dt = 3.0 s
The change in speed of the sled after 3.0 s is calculated as;
[tex]a = \frac{dv}{dt} \\\\dv = a \times dt\\\\dv = 20 \ \times \ 3\\\\dv = 60 \ m/s[/tex]
Therefore, the change in speed of the sled after 3.0 s is 60 m/s.
The speed of the sled change in 3.00 seconds is 60m/s.
Given that,
The constant acceleration of magnitude [tex]20 m/s^2[/tex].And, the time taken is 3.00 seconds.Based on the above information, the calculation is as follows:
[tex]= 20 \times 3[/tex]
= 60 m/s
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A phonograph record 0.15 m in its radius rotates 18 times per 90 seconds what is the frequency?
Answer:
The frequency of the phonograph record is 0.2 Hz
Explanation:
The frequency of an object moving in uniform circular motion is the number of completed cycles the object makes in a specified time period
The given parameters of the phonograph record are;
The radius of the record = 0.15 m
The number of times the phonograph record rotates, n = 18 times
The time it takes the phonograph record to rotate the 18 times, t = 90 seconds
The frequency of the phonograph record, f = (The number of times the phonograph record rotates) ÷ (The time it takes the phonograph record to rotate the 18 times)
∴ The frequency of the phonograph record, f = n/t = 18/(90 s) = 0.2 Hz
The frequency of the phonograph record = 0.2 Hz.
What is a standard? Does it's value count in determining the number of significant digits in the answer?
Answer:
The standard deviation is a measure of the dispersion of a series of data
Result = x_{average} ± σ
Explanation:
The standard deviation is a measure of the dispersion of a series of data, it is generally used when a series of measurements of some parameters are made and it is desired to take into account the statistical fluctuations of these measurements, its formula is
[tex]\sigma = \sqrt { \frac{\sum (x_i -x_{average} )^2}{ N} }[/tex]
where N is the number of measurements
This is a measure equivalent to the absolute error in a single measurement.
Therefore, the number of decimal places in a result must not be greater than the standard deviation.
Result = x_{average} ± σ
In order for an ion to have a -1 charge, it must have
8. Calculate the total resistance in a series circuit with a fan (3 ohms) and 3 lights (1 ohms each). 9 ohms O 12 ohms 15 ohms 06 ohms
Answer:
R_eq = 6 Ω
Explanation:
In a series circuit the current is constant throughout the circuit and the resistance is the sum of all the resistances in it.
R_eq = ∑
in this case we have
R_eq = R₁1 + 3 R₂
where R₁ is the resistance of the fan and R₂ the resistance of each light, we must clarify that we will assume that the resistance of the lights does not change with temperature
let's calculate
R_eq = 3 + 3 1
R_eq = 6 Ω
Answer:
6 ohms
Explanation:
How do you determine the height of a wave?
Answer:
Wave height is the vertical distance between the crest (peak) and the trough of a wave. Some other definitions: Still-Water Line is the level of the lake surface if it were perfectly calm and flat. Crest is the highest point on the wave above the still-water line.
Explanation:
NEED HELP ASAP
thanks + BRAINLIST only for correct answer
Answer:
I. They come from sources across space
II. They travel in a straight line from their source.
III. They can be reflected by some types of material.
Explanation:
Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.
The following statements about light waves are true;
I. They come from sources across space.
II. They travel in a straight line from their source.
III. They can be reflected by some types of material. reflection occurs when a ray of light or wavefronts bounces off a smooth surface. Thus, when light hit a surface, it bounces back to the medium from which it was originally propagated with.
However, light waves cannot travel through all type of material except materials that are transparent or translucent but not opaque.
Question 2 10 points)
Blueprints were used in the year
Answer:
1842.
Explanation: Blueprints were invented a generation before the Civil War by John Herschel, a chemist, astronomer, and photographer, in 1842.
20 points + Brainliest. Help please!
In an adiabatic process, the pressure on an ideal gas is increased to 14 times its initial value. The initial volume is 78 L. What is the final volume? Let γ = 1.67.
A. 16 L
B. 22 L
C. 8.1 L
D. 10 L
Answer:
i belive it should be C
Explanation:
When more energy is released when new bonds are formed. Which bonds are stronger. Please add why
1. The bonds that are formed
2. The bonds that are broken
Answer:
the bonds that are formed
Explanation:
Energy is absorbed in order to break bonds. Energy is released when new bonds are formed. Bond-making is a process of exothermic. Whether the reaction is endothermic or exothermic refers to the difference between the energy needed to break bonds and the energy released when new bonds are formed.
Please help with this?!?!?!?!?!?!
Answer: c because our solar system is called the milky way
Explanation:
Urgent! Pls help
A bug and windshield of a fast-moving vehicle collide. Which of the following statements does NOT describe this situation?
A) The change in momentum of the bug and the vehicle is the same.
B) The force felt by the bug and the vehicle is the same.
C) The impulse felt by the bug and the vehicle is the same.
D) The acceleration of the bug and the vehicle is the same.
Answer:
The force felt is the same
Explanation:
how the relationship between photosynthesis and cellular respiration prove that the Laws of Conservation of Mass and Energy exists in living systems?
Answer:
The AMOUNT of oxygen and carbon atoms released by photosynthesis are EXACTLY EQUAL to the atoms of these material contained in carbon-dioxide converted. In this way photosynthesis has conserved the mass or material, and in this way followed the law of conservation of mass.
What type of reaction feels cold to the touch? A. Endothermic, because energy is being released into the surroundings B. Endothermic, because energy is being absorbed from the surroundings C. Exothermic, because energy is being released into the surroundings D. Exothermic, because energy is being absorbed from the surroundings
Answer:
D. Exothermic, because energy is being absorbed from the surroundings
Explanation:
This is true about the Exothemic reaction due to the fact that, the reaction occurs outside the body. During this reaction, the energy being absorbed from the surrounding environment will hit the body surface thereby creating the coldness due to the heat given out from the body being minimal.
Answer:
Endothermic, because energy is being absorbed from the surroundings.
Explanation:
According to Newton’s second law of motion, what is force equal to?
Answer:
Force is equal to Mass Multiplied by Acceleration
F = M x A
Answer:
Newton's second law of motion is F = ma, or force is equal to mass times acceleration.