Two carts, moving at opposite directions, collide and recoil. Which question would help determine if the system of two carts is open or closed? A) Do the carts have the same mass? B) Do the carts have different initial velocities? ) Is energy transferred from one cart to the other? D) Is the total momentum constant before and after the collision?
Answer:D
Explanation:
i’m not sure if that’s right but that’s what i think
What is the definition of light of one year ?
Answer:
The definition of a light year is the distance a photon will travel in a year in a vaccume, like space.
What is the kinetic energy of a
54 kg person, diving into a pool
at a speed of 30 m/s?
Answer:
Explanation:
Formula
KE = 1/2 m v^3
Givens
m = 54 kg
v = 30 m/s
Solution
KE = 1/2 54 * 30^2
KE = 1/2 54 * 900
KE = 27 * 900
KE = 24300 Joules
What is the equivalent resistance between terminals A and B, measured in ohms?
Answer:
c. 0.80
Explanation:
they will choose the path that has not resistance
a force 4000 n accelerates a car of mass 800 kg from rest to 20 ms how far does the car travel while the force is acting?
Answer:
d = 40 m
Explanation:
Given that,
Force, F = 4000 N
Mass of a car, m = 800 kg
Initial velocity, u = 0 (at rest)
Final velocity, v = 20 m/s
We need to find the distance traveled. Force acting on a car is given by :
F = ma
Where
a is the acceleration of the car.
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{4000}{800}\\\\a=5\ m/s^2[/tex]
Let it has traveled d distance. Using third equation of motion.
[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{(20)^2-(0)^2}{2\times 5}\\\\d=40\ m[/tex]
So, the required distance is equal to 40 m.
Can you guys please help me?
Answer:
20V
Explanation:
V = intensity * resistance
V = 2 * 10 = 20
A compound pulley is a type of system. How does a system work?
HELP ASAP!
1) Under what conditions would you expect to see a full moon?
2) Under what conditions would you expect to see a new moon?
Answer:
The full cycle of Moon phases takes on average 29 nine days and 12 hours for 8 phases when i name the “minimal moon” as a distinct phase (it vary a bit over and under that because Earths orbit is elliptical).
That gives us 2 half cycles of 4 phases each:
Minimal Moon. The moon show hardly any crescent and the bit of crescent it do show is nearly horizontal. Earth, Moon and Sun is near conjunction (on the same line, there may be a solar eclipse in mid phase).
New Moon (aka Waxing Crescent). The crescent grows and becomes more vertical.
Half moon (aka First Quarter) . The crescent is now halfway to full moon.
Waxing Gibbous. We see the moon as convex on both sides, and growing.
Full moon. We see the moon as circular ( again near a conjunction, there may be a lunar eclipse in mid phase)
Waning Gibbous. We see the Moon shrinking again.
Third quarter (the ‘other’ half moon, but now it is the other half of the Moon we can see).
Waning Crescent (shrinking crescent)
‘Waxing’ means growing and ‘Waning’ means shrinking. ‘Gibbous’ means fat, and now the cycle start over with:
Minimal Moon. again
Each phase takes 29.5/8 days. that is 3 days and 16.5 hours
So to answer your question: New Moon to Full Moon is 3 phases. 9 days + 49.5 hours = 11 days and 1.5 hours
The naming of the moon phases is based on human eyesight estimates. That is why I felt a need to introduce the ‘Minimal Moon’ phase to make it Mathematically consistent.
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Two resistors r1=100 ohm and r2=220 ohm are connected in series across a voltage of 6.4v calculate the resistance of the resistor equivalent to r1 and r2
Answer:
r_eq = 320 Ω
Explanation:
It is asked to find the equivalent resistance of a series circuit formed by two resistors r₁ and r₂
r_eq = r₁ + r₂
r_eq = 100 + 220
r_eq = 320 Ω
with this value we can find the current that circulates through the circuit
V = r_eq i
i = V / r_eq
i = 6.4 / 320
i = 0.02 A
Which of these is NOT a line on the tennis court?
Base line
Service line
Side line
Front line
Answer:
The answer would be Front Line
The base line, service line, and the side lines are the part of the tennis court however front line is not a part of the tennis court. Thus, the correct option is D.
What are the specifications of Tennis Court?
A tennis court is a 78ft long court, with a service line of 21ft from the net. The courts for singles tennis matches are 27ft wide in dimension, while the doubles matches courts are 36ft wide. The total playing area in tennis for a singles court is 2,106ft² and 2,808ft² for a doubles court.
The basic and important parts of a tennis court in both singles and doubles are the baseline, the center mark, the sidelines, the service lines, and the service boxes. The baseline is the boundary line at the ends of the tennis court, and the sidelines are the lines which mark the boundary line between in-bounds and out-of-bounds for both singles and doubles play.
Therefore, the correct option is D.
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What does it mean for two parameters to be inversely proportional?
that means the parameter over another
Explanation:
that is when you say a parameter is inversely proportional to another it means what ever happens to the first parameter the opposite happens to the other parameter
3. Given a force of 44 N and an acceleration of 4 m/s?, what is the mass?
Answer:
m=F/a
= 44/4
= 11 m
Explanation:
Just use the formula F=ma
if the reference point changes, the
_____ of position changes, but the actual position does not change
Answer:
description
Explanation:
Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.
A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.
For example, a point on a map is considered to be a reference point because it represents the starting point of an object or person in motion.
If the reference point changes, the description of position changes, but the actual position does not change.
Answer:
description
Explanation:
Hope this helps
Okay I help some of you guys so can help me please
How do you increase the potential energy between two south magnetic
poles?
Answer:
A south pole of one magnet can approach the north pole of another. The magnetic fields are aligned. This makes an attractive force between the two magnets. The farther apart they are, the higher their potential energy.
A tuna traveling at 12 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is its acceleration?
Answer:
a = -1.2 m/s^2
Explanation:
Vi = 12 m/s
Vf = 0 m/s
t = 10 s
Plug those values into the following equation:
Vf = Vi + at
0 = 12 + 10a
---> a = -1.2 m/s^2
An inclined plane creates a mechanical advantage of 5. What would the input force need to be to create an output force of 20 N?
A. 15 N
B. 100 N
C. 4 N
A common design for a spotlight uses a lens and a mirror, combined with a gas-discharge lamp, to project a powerful parallel beam of light. Where are the lens and mirror positioned?
Answer:
Explanation:
For answer please see the image attached .
The mirror reflects the light while the lens allows the light to pass through it. The lens and mirror are positioned parallel and opposite each other.
What is the difference between the lens and mirror?The basic difference between the lens and mirror is that mirror reflects the light while the lens allows the light to pass through it. Both are optical instruments but their laws are different.
The lens and mirror are positioned parallel and opposite each other. From the above conditions, it is observed that first, the light gets passed through the lens.
After it passes through the light got reflected. As the light reflected the mirror it again passes through the lens and converts the distributed or parallel lights into a single beam of light.
The single beam of light is known as the spotlight.
Such types of design for a spotlight use a lens and a mirror, combined with a gas-discharge lamp, to project a powerful parallel beam of light.
Hence the lens and mirror are positioned parallel and opposite to each other.
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Which is the wavelength of a wave that travels at a speed of 3.0 × 10^8 m/s and has a frequency of 1.5 × 10^16 Hz?
Answer:
2 x 10^-8
Explanation:
the formula of wavelength is
the speed divided by frequency
so you have the speed given = 3.0x10^8m/s
and frequency = 1.5×10^16 Hz
so wavelength = 3.0x10^8m/s / 1.5x10^16 Hz
Please use this screenshot in any way you can
What is the difference between obtaining knowledge from a controlled experiment versus other forms of scientific investigation?
Answer:
Any scientific investigation in its simplest form involves collecting information, while a controlled experiment is a tightly controlled investigation that tests a hypothesis.
Explanation:
All the scientific investigations start with a particular question. The question decides what type of investigation should research take. A controlled experiment is an investigation which allows a particular variable to change and all other variable controlled to remain constant to see the effect on dependent variable to test a particular hypothesis while other types of investigations are used to increase the knowledge or information about the particular research subject.
10.(a) At what water depth is the pressure twice atmospheric pressure?
(b) What is the pressure at the bottom of the 11-km-deep in the ocean? Take
atmospheric pressure as 100 kPa and the density of water as 1000 kg/m3.
Answer:
Answer. Pressure under water is given by the sum of atmospheric pressure and pressure of fluid. Thus, depth in water at which pressure will be equal to twice the atmospheric pressure is 10.2 m.
Explanation:
I need help! PLZZZZZZ
Solar flares produce lethal levels of radiation. What type of warning will astronauts receive before these high-energy particles are hurled at them?
Answer:
Even inside their ships, astronauts are exposed to a slow drizzle of cosmic rays coming right through the hull. The particles penetrate flesh, damaging tissue at the microscopic level. One possible side-effect is broken DNA, which can, over the course of time, cause cancer, cataracts and other maladies.
How much force is required to accelerate a 100 kg wagon at 5 m/s2?
Answer:
500N
Explanation:
f = ma
100kg x 5 m/s^2 = 500N
11. What is the wavelength in nanometers of the most energetic violet light?
Answer:
410 nanometers
Violet light is electromagnetic radiation with wavelengths of 410 nanometers and red light has a wavelength of 680 nanometers. The nanometer is a unit of distance in the metric scale and is abbreviated as nm. One nanometer (nm) equals one thousand millionths of a meter (m) or 1 nm = 10-9 m.
Explanation:
Hope it helps! Correct me if I am wrong :>
Answer:
Using my searching skills, I have came to the conclusion that the most energetic violet light wavelength is 380nm.
Para pagar la entrada al circo y comprar palomitas: Daniela y María van a cooperar con $65.50 cada una y Francisco y Javier con $69.50 cada uno. ¿Cuánto dinero van a reunir?
Answer:
Reunirán $270.
Explanation:
Para pagar la entrada al circo y comprar palomitas Daniela y María van a cooperar con $65.50 cada una. Entonces para calcular el dinero que van a reunir entre ambas debes sumar lo que aporta cada una:
$65.50 + $65.50= $131
Por otro lado, Francisco y Javier van a cooperar con $69.50 cada uno. De igual manera, para calcular el dinero que van a reunir entre ambos debes sumar lo que aporta cada uno:
$69.50 + $69.50= $139
Para conocer el dinero total recaudado, debes sumar lo que aportan tanto ellas como ellos. Esto es:
$131 + $139= $270
Reunirán $270.
what is the mass of an object if a force of 34 N produces an acceleration of 4.0 m/s squared
Answer:
8.5 kg
Explanation:
F = ma
34 N = m(4.0m/s^2)
m = 8.5 kg
What is defined as a push or pull?
motion
force
speed
vector
☁️ Answer ☁️
annyeonghaseyo!
Your answer is:
Force.
Explanation: Force is defined as a push or pull acting on an object. Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.
Here's another one: Force is everywhere and it comes in a variety of sizes, directions, and type. We can define Force as the push or pull of an object.
Hope it helps
Have a nice day noona/hyung!~ ￣▽￣❤️
What is point c called?
The work done in lifting a brick of mass 2kg through a height of 5m above the ground will be
(A)2.5J
(B)10J
(C)50J
(D)100J
Answer:
D. 100 J
Explanation:
Given
Mass (m) = 2 kg
Height (h) = 5 m
Acceleration due to gravity (g) = 10 m/s²
Now
Work done(W)
= m * g * h
= 2 * 10 * 5
= 100 Joule
Hope it will help :)❤
The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:
D). 100 J
Given that,
Mass of the brick [tex]= 2Kg[/tex]
Height of the brick [tex]= 5m[/tex]
As we know,
Work Done (W) [tex]= mgh[/tex]
where
m = Mass
g = Acceleration due to gravity
h = height
A.T.Q.
By substituting the given values, we get;
[tex]Work Done (W)[/tex] [tex]= 2[/tex] × [tex]10[/tex] × [tex]5[/tex] (taking [tex]g = 10 m/s^2[/tex])
[tex]= 100 J[/tex]
Thus, the work done is 100 J and hence, option D is the correct answer.
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