Answer:
A) ΔP = 4.5 [kg*m/s]
B) F = 375 [N]
Explanation:
The linear momentum is defined as the product of the mass of a body by Velocity, therefore we must calculate the momentum for each case.
[tex]P = m*v[/tex]
where:
P = linear momentum [kg*m/s]
m = mass [kg]
v = velocity [m/s]
A)
When the soccer ball is rolling towards the player
[tex]P =0.25*6\\P = 1.5[kg*\frac{m}{s}][/tex]
After kicking the ball
[tex]P = 0.25*24\\P = 6 [kg*\frac{m}{s} ][/tex]
Therefore the change momentum is equal to
ΔP = 6 - 1.5 = 4.5 [kg*m/s]
B) Momentum is defined as the force applied for a certain time, this momentum produces a linear momentum.
We must be especially careful in the directions of the movement, since depending on the direction a positive or negative sign must be included according to the established convention. In this particular case we are going to take the kick and the direction of this as positive, that is to say, the ball moves in the negative direction and after hitting the ball it moves in a positive direction.
[tex]-(m*v_{1}) + F*t = (m*v_{2})\\-(0.25*6) + (F*0.02) = (.25*24)\\F*0.02= (7.5)\\F = 375 [N][/tex]
A 12kg cheetah accelerates 24 m/s". What is the force the cheetah needed to run?
Answer:
288N
Explanation:
Given parameters:
Mass of Cheetah = 12kg
Acceleration = 24m/s²
Unknown:
Force needed by the cheetah to run = ?
Solution:
The force needed by the Cheetah to run is the net force.
According to Newton's law;
Force = mass x acceleration
Insert the given parameters and solve;
Force = 12 x 24 = 288N
Calculate the average atomic mass of caarbon given the following information: Carbon-12 12.000 amu 98.89%
Carbon-12 13.003 amu 1.11%
Answer:
12.01
Explanation:
Given parameters:
Abundance of C-12 = 98.89%
mass of isotope = 12amu
Abundance of C - 12 = 1.11%
mass of isotope = 13.003
Unknown:
Average atomic mass of carbon = ?
Solution:
The average atomic mass ;
R.A.M = (mass of isotope x abundance of isotope)-12 + (mass of isotope x abundance of isotope)- 13
Insert the parameters and solve;
R.A.M =( 12 x 98.89%) + (1.11% x 13.003)
R.A.M = 11.87 + 0.14 = 12.01
A student spots an unknown sample on a TLC plate. After developing in hexanes/ethyl acetate 50:50, he/she saw a single spot with an Rf of 0.55. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?
Answer:
See explanation
Explanation:
A pure sample is known to give one spot on a chromatogram. This is the first indication that the substance is a pure substance. Since the student saw a single spot, the unknown substance is pure.
Subsequently, the substance can be boiled since it is a liquid. Impure substances boil over a range of temperatures. If the substance is pure, it will have a sharp boiling point which can be compared with boiling points of known substances recorded in literature hence the substance can be correctly identified.
The given unknown material or compound is a pure compound - yes, it has only one spot.
In the given TLC plate there is only one single spot found thus we can say it is the pure compound as If an impurity is present along with the major compound then there we could observe more spots other than the major compound.
The verification of the purity of the sample can be tested by a general procedure
conduct the TLC of the given compound and a separate TLC consisting of the pure compoundcompare the Rf values of both platesif it matches with the Rf value of the pure compound then the given compound is confirmed. the TLC plate has no spots other than the main compound therefore, it is a pure one.Thus, The given unknown material or compound is a pure compound - yes, it has only one spot.
Learn more:
https://brainly.com/question/14849710
What does properties mean
Answer:
a thing or things belonging to someone; possessions collectively.
Explanation:
What time is it in Orlando, FL when it is 10:00 a.m. in Los Angeles, CA?
7:00 a.m.
1:00 p.m.
2:00 p.m.
10:00 a.m.
Answer:
1:00 pm
Explanation:
CA is pacific time zone
FL is Eastern
pacific time is 3 hours less
Answer:
1:00 p.m.
Explanation:
Los Angeles, CA is in the Pacific Standard Time zone which is 3 hours behind the Eastern Standard Time zone, the time zone that Orlando, FL is in.
What is molasses?
dye
sugar
brown candy
brown syrup
I need help fast please I will give you extra points
Answer: Brown syrup
Explanation:
Answer:
syrup
Explanation:
How many forces are used in a catapult ( please help me asap I have a presentation due tomorrow and. I need help starting
Answer:
Hey buddy, here is your answer.Hope it helps you.
Explanation:
A catapult is a launching device that allows us to experimentally observe projectile motion. Once the ball is launched, the only forces acting are gravity and air resistance.
A bus covers 10 km in 7 minutes. Find the speed of the bus in km/h
explain how water compared to other substance when it comes to a thermal expansion
A current of 0.2A flows through a component with a resistance of 40ohms calculate the potential difference
Answer:
8V
Explanation:
Given parameters:
Current = 0.2A
Resistance = 40ohms
Unknown:
Potential difference = ?
Solution:
Potential difference is force that drives current in an electric circuit.
According to Ohms law, it is given as;
V = IR
V is the potential difference
I is the current
R is the resistance
Now, insert the parameters and solve;
V = 0.2 x 40 = 8V
Here we have been given with the amount of current which flows through the component that is 0.2A and resistance that is of 40Ω. So we would be using Ohm's law to calculate the potential difference (V).
★ Ohm's Law :
V = IRHere,
V is potential difference R is resistance I is current★ We have :
R = 40Ω I = 0.2A★ Substituting the values :
>> V = 0.2(40)
>> V = (2 / 10) × 40
>> V = 2 × 4
>> V = 8
★ Therefore,
Potential difference is of 8V.Cookie (the mean cat) runs 20 meters east to kill a bird. He then runs 10 meters
west to bring it back to his owners.
A. What is the distance?
B. What is the displacement?
d) A tank with dimensions: 3m x 2m x 2m contains water upto its half
pertion. What is the pressure at the base of the tank? (density of water
= 1000 kg/m3, g= 9.8 m/s2)
(Ans: 9800 Pa)
Answer:
P = 9800 [Pa]
Explanation:
In order to calculate the pressure at the bottom, we must use the following formula.
P = Ro*g*h
where:
P = pressure [Pa] (units of pascals)
Ro = density of the water = 1000 [kg/m³]
g = gravity acceleration = 9.8 [m/s²]
h = height = 1 [m] (because its half of the portion, the full height is 2 m)
P = 1000*9.8*1
P = 9800 [Pa]
6th grade science If you answer this your the brainiest
Answer:
8. sketches and models helped the astronauts in their training program as they prepare for their missions
9. before building the Mars lander , students need to sketch their design
Seeing light coming out from a crack in the wall is what type of wave interaction?
A. Reflection
B. Refraction
C. Diffraction
D. Resonance
Answer:
C
becuase its where a wave (light etc) goes through a narrow area or across an edge of an area
A substance burns in the presence of oxygen.
Which answer choice names a chemical property in this scenarlo?
O density
O boiling point
solid formation
O flammability
Answer:
D. flammability
Explanation:
I took the test and got it right
What type of objects exert gravitational pull? (5 points) Only living objects Only space objects All objects having mass All substances that are visible
Answer:
Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but that force isn't very strong, since people aren't very massive.
Answer:
All objects having mass
Explanation:
What the other guy said
also I took the test!
You should always wear your seatbelt just in case the car comes to an abrupt stop. The seatbelt will hold you in place so that your body does not continue moving when the car stops.
What property of matter will keep your body in motion when the car comes to a halt?
Group of answer choices
inertia
mass
force
acceleration
Answer:
inertia
Explanation:
The property of matter that will keep the body in motion when the car comes to a halt is the inertia force.
Inertia is the ability of a body to remain in static position. It is the tendency to remain in a stable condition where there is no motion.
Newton's first law is the law of inertia and it states that a body remain in a state of rest or of uniform motion unless acted upon by an external force. The ability to remain in state of rest by a body is predicated on the force of inertia.Answer:
inertia
first
Explanation
The addition of electron shells results in _____
from the nucleus.
shielding of electrons
Answer here
Answer:
shielding of electrons
Explanation:
The addition of electrons shells results in the shielding of electrons away from the nucleus, most importantly the nuclear pull resulting from the charge.
The nucleus pulls electrons to itself due to the net positive charge on it. As more electronic shell is added, the effect of the pull weakens outward. The inner shell experiences the nuclear pull more than the outer shell electrons.The effect is responsible for a wide range of properties of elements.
CAN SOMEONE HELP ME? thank you :)
Why are bridges built with joints in them?
Answer:
To provide flexibility in the structure to expand and contract temperature variation; also designed to accommodate movement between structures
What will happen if the birth and death rate increased?
Answer:
To know what will happen we first need to know if the birth rate is more or if the death rate is more if the birth rate had a sudden increases above the death rate we would likely face population problems on the other hand if the death rate is increased more than the birth rate we would have less population problems and more food and resources but if the birth and death rate were to increase equally there would just be a standstill in the population
Explanation:
Carl went on a Euro Trip and was traveling from Spain to Russia. When he looked on the map it said Russia was 7035 km away from Spain. If it took Carl 7 hours to get there, what would his average speed be in meters per second?
Answer:
The average speed would be 279.167 meters per second.
Explanation:
Speed is the magnitude that expresses the variation in position of an object and as a function of time. In other words, speed is defined as the relationship established between the distance traveled and the time elapsed in the movement of a mobile.
Speed can be calculated using the following expression:
[tex]Speed=\frac{distance}{time}[/tex]
In this case:
distance= 7,035 kmtime= 7 hoursSince the required unit of speed is meter per second, then you convert from km to meters for the case of distance, and from hours to seconds for the case of time. So:
distance= 7,035 km= 7,035,000 m (being 1 km= 1,000 m)time= 7 hours= 420 minutes= 25,200 seconds (being 1 hour=60 minutes and 1 minute=60 seconds)Replacing in the definition of speed:
[tex]Speed=\frac{7,035,000 meters}{25,200 seconds}[/tex]
Solving:
[tex]Speed=279.167\frac{meters}{ seconds}[/tex]
Then, the average speed would be 279.167 meters per second.
Determine the acceleration of a boat
with a speed of 18 m/s for 20 seconds.
Answer:
Explanation:
initial velocity, u = 0
final velocity, v = 18 m/s
time = 20 sec
acceleration, a = v - u / t
= 18 - 0 / 20
= 18 / 20
= 9 / 10
= 0.9 m/s^2
Hope this helps
plz mark as brainliest!!!!!!
An object with a mass of 6.5 kg accelerates 12.3 m/s2 when an unknown force is applied to it. What is the amount of the force?
Answer:
79.95 kgExplanation:
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 = 6.5 × 12.3
We have the final answer as
79.95 kgHope this helps you
How high can a human throw a ball if he can throw it with initial velocity 90 mph.
a144.3 m
b 91.82 m
c 82.45 m
d99.82 m
e45.52 m
Answer:
c 82.45 m
Explanation:
To solve this problem, we have to apply the right motion equation.
Given parameter;
Initial velocity = 90mph
So;
Using;
V² = U² - 2gh ; we can solve this problem
V is the final velocity = 0mph
U is the initial velocity
g is the acceleration due to gravity
h is the height
Now insert the parameters and solve;
We need to convert from mph to m/s
1 mph = 0.45m/s
90mph = 40.5m/s
0² = 40.5² - (2 x 9.8 x h)
0 = 1640.25 - 19.6h
-1640.25 = -19.6h
h = 83.7m
TRUE OR FALSE!!!!!
PLEASE HELP
Igneous rock is formed by volcanoes releasing magma from the mantle, the rock cools and piles up forming a mountain. Rivers direct water to cool magma underground forming metamorphic rock under lake beds.
Answer:
true
Explanation:
this is true, igneous rocks are formed from molten lava when it cools
Answer: True
Explanation:
How many significant figures are in 107 moles of sodium
Answer:
3 significant figures
Explanation:
here zero is counted as one of the significant figures since it lies next to an integer.
hence the number has 3 sfg
According to peacemaking criminology, toward which option should a country redirect the money it currently spends on imprisoning criminals?
A.
nuclear technology
B.
stock market
C.
environmental campaigns
D.
private organizations
Answer:
Explanation:
It is C. Environmental campaigns
Answer: environmental campaigns
Explanation:
got it right on the test
The mass of a meteoroid was found to be 1.24 × 107 kilograms. Write the mass in standard notation.
Answer:
The value we are given in the question is 1.24 * 10^7. This form of writing number is called scientific notation. The standard notation is the normal, regular way of writing numbers. Scientific notation and standard notations are interchangeable.
1.24 * 10^7 written in standard notation will be = 1.24 * 10000000 = 12400000.
Thus, the mass of the meteoroid was 12400000 kg.
Explanation:
Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which
then generates an electric current. This electric current, in turn, allows the car to move. Which shows the correct
order of energy transformations that take place in a solar-powered car?
electrical, chemical, kinetic
electrical, kinetic, radiant
radiant, chemical, electrical
radiant, electrical, mechanical
Answer: I Believe Its radiant, electrical, mechanical!
Explanation:
Please correct me if i'm wrong!
Answer:
D) radiant, electrical, mechanical Is correct!
Explanation:
Hope this helps! :)
