Answer:
The girl must sit 5 m on the other side of the seesaw.
Explanation:
Given;
mass of the boy, = 75 kg
mass of the girl, = 50 kg
distance of the boy from the pivot, = 2 m
let the distance of the girl from the pivot = d
<-------------2m-------------><-------------d-------------->
-----------------------------------------------------------------------------------
↓ Δ ↓
75 50
Apply the principle of moment, about the pivot;
clockwise moment = anticlockwise moment
75 x 2 = 50 x d
150 = 50d
d = 150 / 50
d = 3 m
The distance of the girl from the pivot is 3 m.
Therefore, the girl must sit ( 2m + 3m ) on the other side of the seesaw.
A van moves with a constant speed of 20 miles per hour. How far can it travel in 3 1/2 hours
A snowboarder is sliding down a hill to the right. What are the 3 forces being used?
Answer:
ANswers
Explanation:
Friction, knetic, and physics
Select the community facility which typically has a variety of offerings for physical activity like team sports, exercise classes, and swimming.
Bowling Alley
Golf Course
Skate Park
YMCA
Answer:
YMCA
Explanation:
i know everything ;)
Answer: It should be YMCA if im not wrong i took the test a while back.:)
Explanation:
How far would a car traveling at a speed of 35 miles per hour if it traveled for 3 hours?
Answer:
105
Explanation:
Simple math, 35x3=105.
Answer:
105
Explanation:
multiply your time by speed to get distance
TB 70 states that to determine acceleration 1 or 2 things must change. What must change for acceleration to occur?
Answer:
Revise
Test
1
2
3
4
5
6
7
Newton’s Second Law
Unbalanced forces
When the forces acting on an object do not balance, the resultant force will cause the object to accelerate in the direction of the resultant force.
In other words, a resultant force on a body will cause it to change its velocity. This simply means that unbalanced forces will cause:
acceleration
deceleration
change in direction
Explanation:
If a ball drops from 10ft after 5 seconds how high would the ball be. (For every second the ball loses 3ft) a bounce is half of the original height.
A student rides a bicycle for 15 miles in 3 hours. What is the student's speed? What else would you need to know for Velocity?
Answer:
5 miles per hr.
Explanation:
15/3=5 miles 3/3=1 hour
not too sure about velocity bruddah.
Answer:
11 minutes 60 seconds per mile
7 minutes 27.39 seconds per kilometer
5 miles/hour
8.05 kilometers/hour
134.11 meters/minute
2.24 meters/second
Explanation:
5 miles per hour :)
A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at 1.2 m/s", which
force is closest to the net force acting on the vehicle?
Answer:
Gravitaitional pull
Explanation:
Guessing
Kinetic energy and mass are ________ proportional.
Answer:
The Kinetic energy and mass are _directly_ proportional.
Explanation:
We know that Kinetic Energy is basically termed as the capacity of a body to do work.
Kinetic energy is often used to associate with moving objects, therefore, K.E is normally termed as the energy of motion.
The formula of K.E of an object of mass and velocity is defined
K.E = 1/2mv²
From the formula, it is clear that K.E is directly proportional to its mass and also directly proportional to the square of its velocity.
For example,
If A toy plane with a mass of 10 kg is flying at 20 m/s. Its K.E will be:
m = 10 kgv = 20 m/sK.E = 1/2mv²
= 1/2(10)(20)²
= 1/2(10)(400)
= 5(400)
= 2000 J
Now, let suppose, if we double the mass of a toy plane i.e.
m = 20 kg
so
K.E = 1/2mv²
= 1/2(20)(20)²
= 1/2(20)(400)
= 10(400)
= 400 J
Therefore, the K.E is doubled when doubled the mass.
Therefore, the Kinetic energy and mass are _directly_ proportional.
Answer:
directly
Explanation:
A gold ball has a mass of 45g. In a speed test, a golf ball was driven from rest to a velocity of 90m/s.
a) If the time taken for the golf ball to reach this velocity was 0.0005 seconds. What acceleration was this?
b) What forces was applied to the golf ball?
Answer:
1)
Acceleration (a)=change in velocity/ change in time
Velocity (v)=90m/s
Time=0.0005s
a=90/0.0005
The acceleration =180000m/s^2 or 180km/s^2
Force = mass x acceleration
m=40g= 0.04kg
F= 0.04x 180000
F= 7200N or 7.2kN
Explanation:
in a hydraulic press, a force of 20N is applied to a piston of 0.20m2 what is the pressure transmitted through the liquid?
Answer:
,
Explanation:
As particles of matter move faster, an object's
increases.
particle arrangement
temperature
O particle attraction
O potential energy
Answer:
temperature
Explanation:
The movement of particles in an object is directly proportional to the temperature of the object. As the temperature increases, the kinetic energy increases too. This makes the last option (potential energy) incorrect.
The increased kinetic energy results to particles moving farther from each other, which means the particle attraction becomes weaker. This makes the third option (particle attraction) incorrect.
The particle arrangement shows the particles being widely separated. Therefore the arrangement decreases because they become less intact. This makes the first option (particle arrangement) incorrect.
I need help with this
Answer:
position 1 and 4................
A mixture of 5 cm3 of CH4 and 100 cm3 of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All volumes are measured at room temperature and pressure.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
What is the composition of the resulting gas?
Answer:
The composition of the resulting gas;
A. 5 cm³ of CO₂, 10 cm³ of O₂, 80 cm³ of N₂, and 10 cm³
Explanation:
The given parameters are;
The volume of CH₄ in the mixture of air and methane = 5 cm³
The volume of air in the mixture of air and methane = 100 cm³
The percentage by volume of nitrogen, N₂ in the air = 80%
The percentage by volume of oxygen, O₂ in the air = 20%
The equation for the reaction of the chemical reaction between the methane and the air in the mixture is given as follows;
CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)
Therefore, we have;
1 mole of CH₄ reacts with 2 moles of O₂ to produce 1 mole of CO₂ and 2 moles of H₂O
By Avogadro's law, we have that equal volumes of all gases at the same temperature and pressure contains equal number of molecules
Therefore, we have;
1 cm₃ of CH₄ reacts with 2 cm³ of O₂ to produce 1 cm³ of CO₂ and 2 cm³ of H₂O
From which we have;
5 cm₃ of CH₄ reacts with 10 cm³ of O₂ to produce 5 cm³ of CO₂ and 10 cm³ of H₂O (steam)
The volume of the oxygen used in the reaction = 10 cm³
The volume of oxygen present in the air = 20% × 100 cm³ = 20 cm³
The volume of nitrogen present in the air = 80% × 100 cm³ = 80 cm³
Therefore, the composition of the resulting gas is given as follows;
1) 80 cm³ Nitrogen
2) 10 cm³ Oxygen
3) 5 cm³ CO₂
4) 10 cm³ H₂O
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
The mixture of air has been composed of 20 % oxygen and 80 % nitrogen. The volume of air has been [tex]\rm 100\;cm^3[/tex]. Thus, the volume of oxygen and nitrogen in the air has been:
The volume of oxygen, [tex]V_O_2=20\;\rm cm^3[/tex]
The volume of nitrogen, [tex]V_N_2=80\;\rm cm^3[/tex]
Since the reaction, the nitrogen has been remained unused, thus the final composition of nitrogen has been [tex]\rm 80 \;cm^3[/tex].
The balanced equation for the reaction of methane with oxygen has been:
[tex]\rm CH_4\;+\;2\;O_2\;\rightarrow\;CO_2\;+\;2\;H_2O[/tex]
According to Avogadro's law, the presence of gases at the same temperature has volume proportional to the moles of the gases.
Thus, from the balanced chemical equation:
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;O_2[/tex]
Thus,
[tex]\rm 5\;cm^3\;CH_4=10\;cm^3\;O_2[/tex]
Since the available oxygen has been [tex]\rm 20\;cm^3[/tex], the remaining oxygen after the reaction has been [tex]\rm 10\;cm^3[/tex].
Thus, the final composition of oxygen has been [tex]\rm 10\;cm^3[/tex].
Methane has been the limiting reactant. Thus, the concentration of carbon dioxide and water formed has been:
[tex]\rm 1\;cm^3\;CH_4=1\;cm^3\;CO_2\\5\;cm^3\;CH_4=5\;cm^3\;CO_2[/tex]
The final composition of carbon dioxide has been [tex]\rm 5\;cm^3[/tex].
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;H_2O\\5\;cm^3\;CH_4=10\;cm^3\;H_2O[/tex]
The final composition of water (steam) has been [tex]\rm 10\;cm^3[/tex].
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
For more information about the composition of gas, refer to the link:
https://brainly.com/question/4391235
what is science? Illustrate Ur views?
Answer:
Science is
Explanation:
he intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
What is a 60 kg car's velocity if it has a momentum of 2400 kg m/s?
Answer:
40m/s
Explanation:
momentum = mass * velocity
momentum / mass = velocity
2400kg*m/s / 60kg = 40m/s
a stone of 1kg is thrown with a velocity of 20m/s and comes to rest after travelling a distance of 50 m. calculate the force exerted on the object.
Answer:
Force = -4N
Explanation:
Given the following data;
Mass = 1kg
Initial Velocity = 20m/s
Distance = 50m
To find the acceleration;
We would use the third equation of motion;
Since, it comes to rest, its final velocity is zero (0).
V² = U² + 2as
Substituting into the equation, we have;
0 = 20² + 2*a*50
-400 = 100a
a = -400/100
a = -4m/s²
Now to find the force exerted
Force = mass* acceleration
Force = 1*(-4)
Force = -4N
What acceleration is produced when a 3000 N force acts on a 1,200 kg car?
I think you have to do 3000n times 1200kg an that will get ur answer
Describe how you would draw a diagram that shows the electric field between two particles that
attract each other.
Answer:
draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots
Explanation:
i got a 5/5
20 characters
A 100w lightbulb is on for 30 seconds. How much energy was transferred?
How could you determine the injuries or ill person in a secondary assessment?
Answer:
just in internet tho
Signs look, listen, feel and smell for any signs of injury such as swelling, deformity, bleeding, discolouration or any unusual smells. When checking them you should always compare the injured side of the body with the uninjured side. Are they able to perform normal functions such as standing or moving their limbs
Secondary assessments are used in order to determine the injury, how the injury occurred, how severe the injury is, and to eliminate further injury.
Glad to help!
what are metalloids?
Answer:
a type of chemical element whose properties are intermediate between those of metals and nonmetals.
help me please pleasee
Answer:18/2
Explanation:
its half
I need help!!! What is the answer!!
Answer:
A I think hope it helps!!
When an unbalanced force acts on an object
Answer:
What is the question?
Explanation:
I can help you but if you ask!
In your own words tell me about the live cycle of a star (4-5 sentences)
Answer: Stars are formed in clouds of gas and dust, known as nebulae. Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its size.
Explanation: I try to do your question, hope this help
The grocery store is 20 miles away
from where you live. You drive your
car and it takes .5 hours to get there.
What was your rate of speed?
Answer:
40mph
Explanation:
20miles .5 miles away if you go 20 mph you get there in a hour soo if you double to 40 mpg you get there in 0.5
Answer:
40 mph
Explanation:
you went 20 miles in half a hour, multiply twenty by 2 and you get 40
With an average acceleration of 0.50 m/s2, how long will it take a cyclist starting from rest to reach a velocity of 13.5 m/s?
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Acceleration Due to Gravity - Free Fall
V=V;+gt
vir initial velocity (m/s)
=final velocity (m/s)
g=gravity (10 m/s2)
t = time (s)
1. What is the velocity of a dropped object after it has fallen
downward for 3.0s?
V=V;+gt
Vi = 0
8 = 10
t = 3
2. A brick is thrown down off a bridge with a velocity of 5 m/s. What
is its velocity after it has fallen for 2 seconds?
I
3. An arrow is launched straight up from the ground. It reaches its
highest point in 6 s. What velocity was it released at?
a b c d
A V=V+gt
dhehehdhehdhshehehehehehe
Which property increases as an electromagnetic waves energy decreases
Answer:
Wavelength
Explanation:
Answer:
wavelength
Explanation:
ape x