Answer:
Nothin will move, it will stay the same since no force is greater than the other. it's "the same amount of force" which also means an equal amount of force
Explanation:
The forces are only equal if there is no acceleration (which in the game of tug of war, accelerating yourself and your opponent is the idea). If the force on the rope and the ground are both equal either nothing moves or some other force is being applied in the system.
Hope this helped!
Which graph accurately shows the relationship between kinetic energy and mass as mass increases
Answer:
c
Explanation:
energy doesnt affect to mass of a object
In the picture above, if the cue stick strikes the 0.2-kg cue ball with a force of 1.1 N, what will be the acceleration of the cue ball?
Answer:
0.55 m/s².
Explanation:
From the question given above, the following data were obtained:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
Force (F) is defined as the product of mass (m) and acceleration (a). Mathematically, the force (F) can be represented as:
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can calculate the acceleration of the ball as follow:
Mass (m) of ball = 2 Kg
Force (F) applied = 1.1 N
Acceleration (a) =?
F = ma
1.1 = 2 × a
Divide both side by 2
a = 1.1 / 2
a = 0.55 m/s²
Therefore, the acceleration of the ball is 0.55 m/s²
A ‘thermal tap’ used in a certain apparatus consists of a silica rod which
fits tightly inside an aluminium tube whose internal diameter is 8mm at
0
0C. When the temperature is raised, the fit is no longer exact. Calculate
what change in temperature is necessary to produce a channel whose
cross-section is equal to that of a tube of 1mm internal diameter. (linear
expansivity of silica = 8X10-6
/K and linear expansivity of aluminium =
26X10-6
/K )
Correct question is;
A thermal tap used in a certain apparatus consists of a silica rod which fits tightly inside an aluminium tube whose internal diameter is 8mm at 0°C.When the temperature is raised ,the fits is no longer exact. Calculate what change in temperature is necessary to produce a channel whose cross-sectional is equal to that of the tube of 1mm. (linear expansivity of silica = 8 × 10^(-6) /K and linear expansivity of aluminium = 26 × 10^(-6) /K).
Answer:
ΔT = 268.67K
Explanation:
We are given;
d1 = 8mm
d2 = 1mm
At standard temperature and pressure conditions, the temperature is 273K.
Thus; Initial temperature; T1 = 273K,
Using the combined gas law, we have;
P1×V1/T1 = P2×V2/T2
The pressure is constant and so P1 = P2. They will cancel out in the combined gas law to give:
V1/T1 = V2/T2
Now, volume of the tube is given by the formula;V = Area × height = Ah
Thus;
V1 = (πd1²/4)h
V2 = (π(d2)²/4)h
Thus;
(πd1²/4)h/T1 = (π(d2)²/4)h/T2
π, h and 4 will cancel out to give;
d1²/T1 = (d2)²/T2
T2 = ((d2)² × T1)/d1²
T2 = (1² × T1)/8²
T2 = 273/64
T2 = 4.23K
Therefore, Change in temperature is; ΔT = T2 - T1
ΔT = 273 - 4.23
ΔT = 268.67K
Thus, the temperature decreased to 268.67K
starting from rest has and acceleration 0.3 m/s , calculate the velocity and distance travelled by a car after 2 minutes.
Answer:
[tex]v(t=120)=36m/s\\\\d(t=120)=2160 m[/tex]
Explanation:
t=2minutes = 120 seconds:
t=120s
a=0,3m/s²
The cart starting from rest, then: vo=0m/s
We know that:[tex]v(t)=vo+at[/tex]
[tex]v(t)=0,3t[/tex]
After t=120 s the velocity are:
[tex]v(120)=0,3*120\\v(120)=36m/s[/tex]
We know that:[tex]d(t)=do+vo*t+\frac{a}{2}*t^{2}[/tex]
vo=0m/s
do=0m/s
The distance after t=120s are:
[tex]d(120)=0,3*\frac{120*120}{2} \\d(120)=36*60\\d(120)=2160 m[/tex]
please help, brainest if correct
Answer: B
Its b increased risk of disease
(b)
On what factor does the mechanical advantage of a simple machine depend?
(a) N/m
B.
Very short answer questions,
1.
What is the principle of simple machine?
2.
3.
The efficiency of simple machine is 75%. What does it mean?
4.
S.
What is lever?
In how many classes is lever classified?
Write the name of a simple machine used to change the direction of force.
6.
0
Reliant Science - 9
Answer:
B. 1. The factors on which the mechanical advantage depends are the load, the effort, the distance moved by the load and the distance moved by the effort
2. The principle of a simple machine is the conversion of the direction and magnitude of a force input into one or more outputs of a either a different magnitude, or direction or both
3. A 75% efficiency of a simple machine means that the power of the frictional force is one quarter of the power of the input force
4. A lever is a simple machine that consists of a fulcrum over (or under) which a rigid beam can be applied
5. There are three classes of lever
6. A pulley
Explanation:
B. 1. For simple machines, we have the Ideal Mechanical Advantage, IMA, given as follows;
[tex]IMA = \dfrac{F_r}{F_e} = \dfrac{d_e}{d_r}[/tex]
Where;
[tex]F_r[/tex] = The resistance force (The load)
[tex]F_e[/tex] = The effort force
[tex]d_e[/tex] = The distance moved by the effort
[tex]d_r[/tex] = The distance the load is moved
Therefore, the factors on which the mechanical advantage depends are the load, the effort, the distance moved by the load and the distance moved by the effort
2. The principle of a simple machine is the conversion of the direction and magnitude of a force input into one or more outputs of a either a different magnitude, or direction or both
3. The mechanical efficiency of a simple machine, η, can be expressed as follows;
[tex]\eta =\dfrac{P_{out}}{P_{in}}[/tex]
Where;
[tex]P_{out}[/tex] = The power at output
[tex]P_{in}[/tex] = The input power
[tex]P_{in}[/tex] = [tex]P_{out}[/tex] + [tex]P_{friction}[/tex]
[tex]P_{friction}[/tex] = The frictional force's power
Therefore, an efficiency of 75% means that we have;
[tex]P_{out}[/tex] = η × [tex]P_{in}[/tex] = 0.75 × [tex]P_{in}[/tex] = 0.75·[tex]P_{in}[/tex]
From which we have;
[tex]P_{in}[/tex] = [tex]P_{out}[/tex] + [tex]P_{friction}[/tex] = 0.75·[tex]P_{in}[/tex] + [tex]P_{friction}[/tex]
∴ [tex]P_{friction}[/tex] = [tex]P_{in}[/tex] - 0.75·[tex]P_{in}[/tex] = 0.25·[tex]P_{in}[/tex]
Therefore, 75% efficiency of a simple machine means that the power of the frictional force is 0.25 × (or one quarter of) the power of the input force
4. A lever is a simple machine that consists of a fulcrum over (or under) which a rigid beam can be applied
5. There are three classes of lever
(a) First class lever (b) Second class lever and (c) Third class lever
6. A pulley
A pulley acts by lifting a load upward from a downward applied force.
Explanation:
B. 1. The factors on which the mechanical advantage depends are the load, the effort, the distance moved by the load and the distance moved by the effort
2. The principle of a simple machine is the conversion of the direction and magnitude of a force input into one or more outputs of a either a different magnitude, or direction or both
3. A 75% efficiency of a simple machine means that the power of the frictional force is one quarter of the power of the input force
4. A lever is a simple machine that consists of a fulcrum over (or under) which a rigid beam can be applied
5. There are three classes of lever
6. A pulley
Explanation:
B. 1. For simple machines, we have the Ideal Mechanical Advantage, IMA, given as follows;
IMA = \dfrac{F_r}{F_e} = \dfrac{d_e}{d_r}IMA=
F
e
F
r
=
d
r
d
e
Where;
F_rF
r
= The resistance force (The load)
F_eF
e
= The effort force
d_ed
e
= The distance moved by the effort
d_rd
r
= The distance the load is moved
Therefore, the factors on which the mechanical advantage depends are the load, the effort, the distance moved by the load and the distance moved by the effort
2. The principle of a simple machine is the conversion of the direction and magnitude of a force input into one or more outputs of a either a different magnitude, or direction or both
3. The mechanical efficiency of a simple machine, η, can be expressed as follows;
\eta =\dfrac{P_{out}}{P_{in}}η=
P
in
P
out
Where;
P_{out}P
out
= The power at output
P_{in}P
in
= The input power
P_{in}P
in
= P_{out}P
out
+ P_{friction}P
friction
P_{friction}P
friction
= The frictional force's power
Therefore, an efficiency of 75% means that we have;
P_{out}P
out
= η × P_{in}P
in
= 0.75 × P_{in}P
in
= 0.75·P_{in}P
in
From which we have;
P_{in}P
in
= P_{out}P
out
+ P_{friction}P
friction
= 0.75·P_{in}P
in
+ P_{friction}P
friction
∴ P_{friction}P
friction
= P_{in}P
in
- 0.75·P_{in}P
in
= 0.25·P_{in}P
in
Therefore, 75% efficiency of a simple machine means that the power of the frictional force is 0.25 × (or one quarter of) the power of the input force
4. A lever is a simple machine that consists of a fulcrum over (or under) which a rigid beam can be applied
5. There are three classes of lever
(a) First class lever (b) Second class lever and (c) Third class lever
6. A pulley
A pulley acts by lifting a load upward from a downward applied force.
If a car traveled 60 m in 30 s, what is the velocity?*
Answer:
6.56168
Explanation:
How can we find velocity?*
Answer: discplacement/change in time = average velocity.
Explanation:
There is a formula for velocity which is given above
What is potential difference also called?
What is the energy transformation that takes place when a jumbo-tron video screen shows an instant replay? A. electrical to light B. mechanical to electrical C. light to chemical D. thermal to sound
Answer:
A. electrical to light
Explanation:
A jumbo-tron video is a very large television that is most times fitted into walls and displayed along the main roads. It has a light-emitting display(LED) property. Energy transformation is the conversion of energy from one form to another.
The video screen just as a regular television in the house emits light, sound and heat energies. Electrical energy which flows from one end to another powers the jumbo-tron video screen and is thus converted into light, heat and sound energies.
The energy transformation that takes place when a jumbo-tron video screen shows an instant replay is electrical to light energy.
Energy transformation is the conversion of energy from one form to another.
A jumbo-tron video is an electrical appliance that requires electricity to power on. When jumbo-tron video screen shows an instant replay, this shows that the jumbo-tron has been powered on using electricity and converted to light displayed by the video screen.Hence the energy transformation that takes place when a jumbo-tron video screen shows an instant replay is electrical to light energy.
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What evidence do we have that Earth has a magnetic field surrounding the planet?
A compass works the way it does because Earth has a magnetic field that looks a lot like the one in a magnet.
What is magnetic field?The Earth's field is completely invisible, but it can be felt by a compass needle on the Earth's surface, and it reaches thousands of miles out into space.
Mathematically, the magnetic field is represented as a vector field. This vector field can be easily visualized as a collection of several vectors laid out in a grid. Each vector has a length based on the strength of the magnetic field and points in the same direction as a compass would.
This method is demonstrated by placing a grid of numerous small compasses in a magnetic field. The only distinction is that a compass does not reveal the strength of a field in this instance.
Therefore, A compass works the way it does because Earth has a magnetic field that looks a lot like the one in a magnet.
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decreases, gravitational, increases, kinetic, potential, thermal
A car driving along a road has energy in its _______ store. If the car drive faster this store_____. If the car drives up a hill, energy is transferred to its ____ store. If the care brakes, the kinetic store _____.
If an atom has 16 protons, 14 neutrons, and 19 electrons, what is the atom's electrical charge?
A +2
B.-3
C.-2
D.-5
Answer:
Thus, each atom or ion must contain 16 protons. We are told that the ion also has 14 neutrons, meaning the mass number of the ion is 16 + 14 = 30 Because the ion has 16 protons and 19 electrons, its net charge is -3.
Energy energy can be transferred from one form to another we use many Indrajeet Converse in our daily life observe carefully to find these energy conversion your home make a list of any ten convert including their names along with their energy chains
Answer:
Find the list below.
Explanation:
Energy conversion imply the transformation of energy from one form to another. Examples of these conversions in my home include the following:
1. Chemical energy stored in food is converted to mechanical energy used in working(example sweeping)
2. Chemical energy stored in batteries are used to produce sound energy from the radio.
3. Electrical energy flowing through the wires are used to provide heat energy from the heating device.
4. Electric energy stored in the fan is converted to kinetic energy.
5. Chemical energy stored in petrol is converted to mechanical and electrical energies in the generator.
6. Electric energy supplied by the electric gas cooker is used to generate thermal energy after heating water.
7. Electrical energy flowing through the wires supply light energy in the bulbs.
8. Electric energy is converted to light and sound energy in the televisions.
9. Light energy from the sun is converted to chemical energy in the plants at the garden.
10. Electric energy is converted to sound and light energy in the kitchen blender.
5) A car travels 150 km in 2 hours. What is its speed?
(Show the correct units.)
Answer:
75km/hr
Explanation:
distance(d)=150km
time(t)=2hours
speed=distance/time
=150/2
=75km/hr
The refraction of a wave is caused by a
change in
A. amplitude.
B. frequency
C. speed.
D. wavelength.
Answer:
C- speed
Explanation:
Refraction is the bending of waves caused by a change made in the speed which allows it to move from one medium to another.
Answer:
C. Speed of light
Explanation:
Refraction of light is caused due to change in the speed of light in different mediums. Refraction is the bending of the path of a light wave as it passes from one material into another material. The refraction occurs at the boundary and is caused by a change in speed of light wave upon crossing the boundary
if a ball is thrown up from the ground and takes 2.30 seconds before it hits the ground. A) what was its initial velocity b) what was its max velocity
Answer:
A) The initial velocity is 11.27 m/s
B) The maximum velocity is 11.27 m/s
Explanation:
A) The question is with regards to kinematic motion under gravity
The the time it takes the ball to travel up and return back to the ground = 2.30 seconds
Therefore, from the kinematic equation of motion of the ball, under gravity, v = u - g·t, we have;
t = (v - u)/g
Where;
t = The total time of the motion of the ball = 2.30 seconds
v = The final velocity of the ball = 0 m/as at the maximum height
u = The initial velocity of the ball
g = The acceleration due to gravity = 9.8 m/s²
Therefore, given that we have;
The time it takes the ball to ascend = The time it takes the ball to descend
The time it takes the ball to ascend to maximum height = 2.30 second/2 = 1.15 seconds
Substituting the parameter values of the motion to maximum height, we get;
1.15 = (0 - u)/(-9.8)
-9.8 × 1.15 = -u
11.27 = u
The initial velocity, u = 11.27 m/s
B) Given that the ball experiences a deceleration on the way up, and that the motion of a parabola is symmetrical about the vertex, which is the maximum height, where the velocity is zero, we have that the initial velocity is equal to the final velocity which are both equal to the maximum velocity
Therefore, the initial velocity = The maximum velocity = 11.27 m/s.
Between ball B and ball C, ball ____ has LESS potential energy because ___
a: c;its mass is greater
b: b;its mass is smaller
c: c; its mass is smaller
d: b;its mass is greater
Answer: b
Explanation:
Ec= (1/2)m × v^2
By the formula, you can see that the bigger the mass, the bigger the Cinetic Energy.
b: b; its mass is smaller
Between ball B and ball C, ball B has LESS potential energy because its mass is smaller.
A potential energy, stored energy that depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched.
Potential energy is given by formula.
[tex]P.E= m*g*h[/tex]
Since, P.E is directly proportional to mass. Thus, the ball having smaller mass will have the less P.E.
Thus, option b is correct.
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The speed you read on a speedometer is ____.
Answer:
[tex]\leq 40[/tex]
Explanation:
So if you’re going 40mph, your speedometer may read up to 50.25mph - but it can never read less than 40mph. In order to stay within the law, carmakers calibrate their speedometers to slightly overreport their vehicles' speeds.
A term used to describe a critical assessment of how an athlete acts and what they achieve either during a match or while training is known as:
A. SMART Target
B. Area of improvement
C. Performance analysis
D. Measurement of success
Answer:
I believe D
Explanation:
I'm not for sure but I think it is D
State the lows of reflection
Answer:
The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
Explanation:
Answer: The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.
A student lifts a basketball to a height of 6 feet and lets the ball drop to the ground. Which statement accurately compares the ball's energy at a height of 6 feet (at rest) and at a height of 2 feet (falling)?
A.
The ball's kinetic energy is the same at both heights, but its potential energy is different.
B.
The ball has less potential energy and more kinetic energy at 6 feet than at 2 feet.
C.
The ball's potential energy is the same at both heights, but its kinetic energy is different.
D.
The ball has more potential energy and less kinetic energy at 6 feet than at 2 feet.
Answer:C
Explanation:
If you are holding the ball that would be the ball would have potential energy since it it not moving. Once you drop the ball it will have kinetic energy since it’s moving. If you drop the ball from 6ft it will have more kinetic since it will have more time to accelerate. If you drop the ball from 2ft then it will have less kinetic energy since it is closer to the ground and won’t have beeping time to accelerate and get rid of the potential energy.
Answer:
c
Explanation:
Distinguishing between Speed and Velocity.
Answer:
Speed: Distance per time, 400 km/h, and a scalar quantity.
Velocity: Displacement per time, 20 m/s south, and a vector quantity.
Explanation:
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Thanks!
Which term is also known as a "rate of change"? * a motion b distance c reference point d speed
Acceleration is the answer.............
Imagine that person B is more massive than person A in the picture above.
If they push off of each other with the same amount of force, who will
have the greater acceleration? What law are you applying? Explain how
that law is being applied.
How can magnets cause objects to have kinetic energy?
Answer:
this has to do with the drop in voltage, or potential as electrons traverse the material .
Which formula is used to calculate the mass of an object if the force and acceleration are known?
Answer:
m=F/a so the second one
force÷ by acceleration
What is osomsis and diffusion
Answer:
Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. ... Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.
please help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
try finding on a website
Explanation:
An object is spun around in circular motion such that its frequency is 12 Hz.
a. What is the period of its rotation?
b. How much time will be required to complete 86 rotations?
Explanation:
Given parameters:
Frequency = 12Hz
Unknown:
a. Period of its rotation
b. Time required to complete 86 rotations
Solution:
Frequency is the number of times of rotation per unit of time.
Frequency = [tex]\frac{n}{t}[/tex]
Period is the opposite of frequency;
Period = [tex]\frac{1}{12}[/tex] = 0.083s
b. Time for 86 rotations;
Since frequency = [tex]\frac{n}{t}[/tex]
n is the number of rotation
t is the time
t = [tex]\frac{n}{Frequency}[/tex] = [tex]\frac{86}{12}[/tex] = 7.2s
The period of rotation is 1/12 seconds and it takes 7.17 seconds to complete 86 rotations.
Time period (T) in a rotational or periodic motion is defined as the time taken to complete one rotation and frequency (f) is the reciprocal of time period.
f = 1/T ⇒ T = 1/f , given that f = 12 Hz
T = 1/12 s is the time period of ne rotation
Now if time takes to complete one rotation is 1/12s , then to complete 86 rotation, the time required is
t = 86×(1/12) = 7.17 seconds is taken to complete 86 rotations.
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