Answer:
Traditional methods of measurement involve methods like measurement using the arm, foot or hand span of a particular person which can and does varies form person to person and hence can't be reliable while the standard methods have a fixed standard value which is universal and same for everybody and every place and ..
Two balls collide in a head-on elastic collision and rebound in opposite directions. One ball has velocity 1.2 m/s before the collision, and −2.3 m/s after. The other ball has a mass of 1.1 kg and a velocity of −4.2 m/s before the collision. (a) What is the mass of the first ball? (b) What is the velocity of the second ball after the collision?
Answer:
If two particles are involved in an elastic collision, the velocity of the second particle after collision can be expressed as: v2f=2⋅m1(m2+m1)v1i+(m2−m1)(m2+m1)v2i v 2 f = 2 ⋅ m 1 ( m 2 + m 1 ) v 1 i + ( m 2 − m 1 ) ( m 2 + m 1 ) v 2 i .
Explanation:
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Newton's Third Law predicts that during a collision between two carts, when the sum of the forces acting on the system are zero:
Answer:
The two carts will experience an impulse of the same magnitude, but of opposite directions.
Explanation:
Newton's third law proves that though action and reaction are the same, but they are opposite to each other.
i.e [tex]F_{1}[/tex] = -[tex]F_{2}[/tex]
where: [tex]F_{1}[/tex] and [tex]F_{2}[/tex] have equal value.
Impulse = F x t
where F is the force on the object and t is the time of impact.
In the given question, since the collision takes place in a given time.
Then;
[tex]F_{1}[/tex] x [tex]t_{1}[/tex]= -[tex]F_{2}[/tex] x [tex]t_{2}[/tex]
⇒ [tex]F_{1}[/tex] [tex]t_{1}[/tex]= -[tex]F_{2}[/tex] [tex]t_{2}[/tex]
Thus, since the sum of the forces acting on the system are zero, then the two carts experience an impulse of the same magnitude but opposite in directions.
A video game where characters fight on different platforms needs to constantly update the speed and position of the characters. Which measure would be an initial condition in one of these games?
the size of the character in pixels
the downward acceleration due to gravity
the designation of y=0 as the lowest platform
the speed of a character at the moment of contact
Answer:
d: the speed of a character at the moment of contact
Explanation:
did the quick check
The measure which would be an initial condition in one of these games is
speed of a character at the moment of contact.
The speed of the character at the point of contact is the most suitable
option which tells the exact speed and position of the character in the
video game.
The moment of contact will determine the type of movement and position
exhibited by the players which can then be immediately updated when the
game is being played.
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a material in which electrons are not able to move easily
a. conductor
b. insulator
c. circuit
A material in which electrons are not able to move easily is known as an insulator, on the other hand, the material in which electrons are able to move easily is known as the conductor, therefore the correct answer is option B.
What are metalloids?The elements of the periodic tables that behave as metals, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron, silicon, germanium, arsenic, antimony, tellurium, etc.
As given in the problem we have to find out the term for material for which electrons are not able to move easily,
The term "insulator" refers to a substance in which electrons cannot move around freely, whereas the term "conductor" refers to a substance in which electrons may flow around freely. Therefore, option B is the right response.
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A pushing force acts on a toy car for 3 seconds causing it to accelerate at a rate A’. If the car is replaced with a similar, but larger toy of 2 times greater mass and the same pushing force is applied for the same amount of time, the acceleration of the larger toy car will be
Answer:
one-half of A'
Explanation:
Answer:
C
Explanation:
EDGE 2021
answer pls urgent pls
Answer:
Answer
Prokaryotic cells
Prokaryotic Cells
Answer:
[tex]\huge\boxed{\sf Prokaryotic \ Cells}[/tex]
Explanation:
Pro means "before" and karyon means "nucleus". So, Prokaryotic cells are those cells which lack nuclear membrane.
Eukaryotic cells are cells which have nuclear membrane.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807answer pls urgent pls
Answer:
record vibrations of earthquake
Answer:
[tex]\huge\boxed{\sf Option \ 2}[/tex]
Explanation:
Seismograph is an instrument with is used to record vibrations of earthquake.
Seismographs are basically used to detect seismic waves by which scientists can detect the earth's interior and also can find the depths of earthquakes and their intensity.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807Which kind of wave interaction is shown?
Answer:
where?
Explanation:
ill edit my answer when see it
When do we land on Mars ?
Answer:
I think like 2024 or 25
Explanation:
Elon musk will probably go
Answer:
2025
Explanation:
The first crew of four astronauts were to land on Mars in 2025. Then, every two years, a new crew of four would arrive.
A cat is trying to cross the street. Its velocity v as a function of time t is given in the graph below where
rightwards is the positive velocity direction.
v (m/s)
5
4
3
2+
2
1
5
-2
-3-
-4
-5
What is the cat's displacement Ax from t = 0.5 s to 1.5 s?
Answer:
rightwards is the positive velocity
Rightwards is the positive elicitation:
Answer:
3.8
Explanation:
You perform an experiment to test how far a cannon will shoot a performer at
different angles. The data are shown below.
Angle
Distance (feet)
30°
110
34°
120
38°
128
42°
133
46°
127
50°
119
54°
109
At which angle will the performer travel the shortest distance?
A. 44°
B. 54
Ο Ο Ο Ο
C. 32
D. 50°
Answer:
128
Explanation:
Answer:
54 degrees
Explanation:
A spatially challenged goldfish swims along the x-axis only. Its initial position is 7.8 m. After swimming back and forth a while, it finds itself at the position 4.4 m. Calculate the fish’s displacement (including its sign).
Answer:
The fish displacement was -3.4 m
Explanation:
Distance and Displacement
A moving object constantly travels some distance at defined periods of time. The total moved distance is the sum of each individual distance the object traveled. It can be written as:
dtotal=d1+d2+d3+...+dn
This sum is obtained independently of the direction the object moves.
The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.
The displacement, when the object moves in one axis only is given by:
d = final position - initial position
We know the fist started at 7.8 m from a given reference along the x-axis.
After some undisclosed movements, it ends up at the position 4.4 m. Thus, the displacement is:
d = 4.4 m - 7.8 m = -3.4 m
This means the fish ended up to the left of the position it started from.
The fish displacement was -3.4 m
i need this ASAP please!!!
What is the significance of the discovery of exoplanets?
a. they may possibly be inhabited or harbor life.
b. they can provide natural resources for the future.
c. they help our understanding of the formation of planetary bodies.
d. they help calibrate gps satellites.
e. they help understand the nature of the expansion of the universe.
Answer:
C. the help our understanding of the formation of planetary bodies.
Explanation:
this is the answer of PLATO
A spring gun fires a ball horizontally at 15 m/s. It is mounted on a flat car moving in a straight line at 25 m/s. relative to the ground, what is the horizontal speed of the ball when the gun is aimed forward?
Answer:
15 m/s
Explanation:
The Speed Of The Car Does Not Add To The Speed Of The Bullet
"She finished the sprint with the speed of a cheetah." This statement represents which of the
following functions of language? (2 points)
correct answer is poetic.
Answer:
Poetic
Explanation:
I took the test
Answer:
Poetic
Explanation:
I got it right on the test
g Which technology is used to convert the electric current to digital form to store and play the synthesized music on a computer or mobile device
Answer:
"MIDI technology" is the correct answer.
Explanation:
For transmitting digital instrument information, MIDI seems to be a communication standard. Computer synthesizers, as well as electronic keyboards mainly are using. So many other types of equipment, including certain electric percussion, beatboxes, and sometimes even automated stringed instruments including certain guitars as well as violins, do embrace MIDI, nevertheless.So the above is the appropriate response.
in the demolition of an old building,a 1,300 kg wrenching ball hits the building at 1.07m/s^2.Calculate the amount of force at which the wrecking ball strikes the building
Answer:
1391 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 1300 × 1.07
We have the final answer as
1391 NHope this helps you
An 80 kg object has a µk = 0.35 and a µs = 0.60. Assuming it is on a flat surface
Answer:
What is the normal force on the object (draw a diagram if needed)
784 N
How much force is required to get the object to start to move from rest (max static friction)?
470.4 N
When the object starts moving, what is the force of kinetic friction?
274.4 N
If the moving object has a tension force of 300N to the right pulling it, what is the net force on the object in the horizontal direction? 784 N
What is the acceleration (with direction) of the object based on your answer for part d? Remember that a = net force/m.
Explanation:
We have that for the Question "" it can be said that the normal force and How much force is required to get the object to start to move from rest is
F_N=784NF_{max}480N
From the question we are told
An 80 kg object has a µk = 0.35 and a µs = 0.60. Assuming it is on a flat surface
What is the normal force on the object (draw a diagram if needed) How much force is required to get the object to start to move from rest?
a)
Generally the equation for the Normal Force is mathematically given as
[tex]F_N=mg\\\\F_N=80*9.8\\\\F_N=784N\\\\[/tex]
b)
[tex]F_{max}=0.60*800\\\\\F_{max}480N\\\\[/tex]
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Complete Question
An 80 kg object has a µk = 0.35 and a µs = 0.60. Assuming it is on a flat surface
What is the normal force on the object (draw a diagram if needed) How much force is required to get the object to start to move from rest?
A group of students collected the data shown below while attempting to measure the coefficient of static friction (of course, it looks like this group varied the amount of mass sitting on the block with each trial - this is not recommended). Nonetheless, what is their average coefficient of static friction?
Trial Mass of block (g) Hanging mass (kg)
1 105 0.053
2 165 0.081
3 220 0.118
4 280 0.149
5 315 0.180
6 385 0.198
Answer:
0.130
Explanation:
From the given data, the coefficient of static friction for each trial are:
1. 0.053
2. 0.081
3. 0.118
4. 0.149
5. 0.180
6. 0.198
The sum of the coefficient of static friction = 0.053 + 0.081 + 0.118 + 0.149 + 0.180 + 0.198
= 0.779
So that;
the average coefficient of static friction = [tex]\frac{sum of coefficient of static friction}{number of trials}[/tex]
= [tex]\frac{0.779}{6}[/tex]
= 0.12983
The average coefficient of static friction is 0.130
The average coefficient of static friction is 0.13.
The coefficient of static friction is obtained using the formula; μ = F/R
Where;
F = force acting on the body
R = reaction
μ = coefficient of static friction
The average of measurements is given as; ∑summation of measurements/number of measurements
We can see from the question that there were 6 measurements of the coefficient of static friction. Hence, the average coefficient of static friction is obtained from;
0.053 + 0.081 + 0.118 + 0.149 + 0.180 + 0.198/6
= 0.13
The average coefficient of static friction is 0.13
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MULTIPLE CHOICE
Newton’s first law of motion is also known as the law of ______ while the Newton’s 2nd law of motion is known as the law of _____ and Newton’s third law is also known as the law of ______
Answer:
1st law known as low of inertial
2nd law of acelaration and force relationship
3rd law of action and reaction
A force of 6.00 N acts in the positive direction on a 3.00 kg object, originally traveling at +15.0 m/s, for 10.0 s. (a) What is the object’s change in momentum?
Answer:
60 kg m/s
Explanation:
F= Force = 6 N
m = Mass of object = 3 kg
u = Initial velocity = 15 m/s
t = Time = 10 s
v = Final velocity
[tex]\Delta p[/tex] = Change in momentum
Force is given by
[tex]F=\dfrac{\Delta p}{t}\\\Rightarrow Ft=\Delta p\\\Rightarrow \Delta p=6\times 10\\\Rightarrow \Delta p=60\ \text{Ns}[/tex]
The change in momentum of the object is 60 kg m/s.
Mice produce a large number of offspring all year long, yet the number of mice within a given population changes very little from year to year. The stability of the population size is most likely the result of
Group of answer choices
mice continuing to reproduce when its population is to large.
liming factors that keep the mice population stable
the survival of more female mice than male mice.
the development of mutations in young mice.
When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this change?
•work
•power
•gravitational energy
•chemical energy
Answer:
work
Explanation:
Answer:
A
Explanation:
A student made the electromagnet shown and used it to pick up one sewing pin. She
then doubled the number of coils around the nail and used it to pick up two sewing pins.
How could she change the electromagnet again in order to pick up three sewing pins?
A. She could replace the 6V battery with a 3V battery.
B. She could replace the nail in the wire coil with a large steel bolt.
C. She could replace the 6V battery with a 12 V battery.
D. She could replace the nail in the wire coil with a thick roll of paper.
Correct answer is C!
Answer: i think its c but i am not sure tho but i think its she could replace the 6 v battery with a 12 v battery
Explanation: cause a 12 v is stronger than a 6 v battery
A student made the electromagnet shown and used it to pick up one sewing pin. She then doubled the number of coils around the nail and used it to pick up two sewing pins. She could replace the 6V battery with a 12 V battery.
What is electromagnet?Permanent magnets are not the same as electromagnets. Coils of wire with electricity running through them make up electromagnets. An electromagnet's wire coils act like magnets when an electric current flows through them because moving charges produce magnetic fields.
The coils stop functioning as a magnet when the electricity is turned off. A lot of things use electromagnets.
When magnetic forces are only required for brief periods of time, electromagnets are frequently used in electrical equipment.
Therefore, A student made the electromagnet shown and used it to pick up one sewing pin. She then doubled the number of coils around the nail and used it to pick up two sewing pins. She could replace the 6V battery with a 12 V battery.
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Which best describes what occurs when technology advances
Answer: Technology advancement includes the creation of printhead arrays and multiple carriage systems that cover a larger area of cloth in a single pass of the substrate.
Explanation:
If you drop a rock off a cliff and it hits the ground 3 seconds later how tall is that cliff
Answer:
Basic kinematics, negating drag and assuming ideal conditions, we use the equation:
d=vi*t+1/2*a*t^2
Since vi is 0 (we know this because you’re dropping it, not throwing it)…
…and the only acceleration acting on it is gravity, a=9.8 m/s^2…
…we get
d=1/2(9.8)(5)^2
Explanation:
Some quick mental math tells us that this is about 125 m.
Plugging it in, we find it to be 122.5 m.
a length 650 cm of thin thread wraps around a cylinder exactly 30 times calculate the circumference and the radius of the cylinder (take)
Answer:
circumference= 65/3 cm = 21.67 cm
radius R = 3.45 cm
Explanation:
To calculate the length of the circumference of the cylinder, we divide 650 cm by 30 (the number of times it wrapped exactly around it)
length of circumference= 65/3 cm = 21.67 cm
now use the formula of the circumference length to find the radius (R):
circumference length = 2 * pi * R
65/3 = 2 * pi * R
R = 65 / (6 pi)
R = 3.45 cm
Can someone help plzzzzzzz I need it ASAP thank you
Answer:
Explanation:
Frequency is oscillations per second.
So we have to find the Number of seconds she paced.
2 minutes = 2 X 60
= 120 seconds
Therefore,
Her frequency = 10 / 120
= 1/12 Hertz
A force of 1.50 N acts on a 0.20 kg trolley so as to accelerate it along an air track.
The track and force are horizontal and in line. How fast is the trolley going after acceleration from rest through 30 cm, if friction is negligible?
Answer: The trolley is moving at 2.12m/s
Explanation:
Given from the question that the track and force are horizontal and inline, we have that
F= ma
where F= force= 1.50 N
m= mass = 0.2kg
therefore Acceleration , a = F/ m= 1.50/0.2 =7.5 m/s^2
To find how fast the trolley is going ie the Velocity, v
Having that
initial velocity at rest , u = 0,
acceleration a = 7.5 and
and distance, s = 30 cm = 30/100 = 0.30 m
we use motion equation that
v² = u² + 2 a s
v² = 0² + 2 x 7.5 x 0.30
v² = 4.5
v = [tex]\sqrt{4.5}[/tex]
v = 2.12 m/s
A ball was thrown vertically upward on a planet with a velocity of 2.5 m/sec. If it can rise up to 4m,then calculate gravitational strength of the planet.
pleaseeeeeeeeeeee helppppppppppp
Answer:
0.78m/s^2
Explanation:
using the third equation of motion, the answer is found
v^2=u^2 -2gs
where V= 0 at the maximum point
2gs=u^2
g=u^2
2s
g=2.5^2
2(4)
g=0.78125m/s^2
or g=0.78m/s^2
