The magnitude of the force applied by the wall on the ball while smashed is 38.462 newtons.
How to determine the required impact force to stop a ball of Play-Doh(TM)
After a quick reading of the statement we conclude that the impact theorem shall be useful to determine the dynamic force required to stop the ball when smashed. The impulse theorem results from the combination of the Newton's laws of motion, principle of energy conservation and work-energy theorem:
[tex]m \cdot v_{o} = F\cdot \Delta t[/tex] (1)
Where:
m - Mass of the ball, in kilograms.[tex]v_{o}[/tex] - Initial speed of the ball, in meters per second.Δt - Impact time, in seconds. F - Impact force, in newtons.If we know that m = 1 kg, [tex]v_{o} = 5\,\frac{m}{s}[/tex] and Δt = 0.13 s, then the impact force is:
F = (1 kg) · (5 m/s)/(0.13 s)
F = 38.462 N
The magnitude of the force applied by the wall on the ball while smashed is 38.462 newtons. [tex]\blacksquare[/tex]
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an aeroplane flies with a velocity of 100km/h at an angle of 60 to the horizontal. Calculate its effective velocity in the notherly direction and easterly direction
Explanation:
to find the velocity across the positive y direction we multiply 100 by sin60.
to find the velocity across the positive x direction we multiply 100 by cos60.
horizontal: 50 km/h
vertical: 86.6 km/h
make sure to ask if you need any further guidance.
1.What happens when ice cubes melt in a glass?
a
No energy is transferred.
B
Heat travels from the ice to the warmer
water.
C
The water warms up due to the humidity
D
Heat is transferred from the warmer water
to the ice cubes.
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
The Correct choice is D
Heat always travel from higher temperature body to lower temperature. so we can infer that heat is transferred from the warmer water to the ice cubes which causes melting of that ice in there.
A motorist drives 5 km east then drives 5 km north. Calculate their distance travelled and their displacement.
Answer:
See
distance is 10 km
displacement is 5√2 km
Explanation:
DISTANCE:
Distance is scaler so, it doesn't depend on the direction
so distance is 5+5 which is 10
DISPLACEMENT:
Displacement is a vector, so, it depends on direction.
Now when we see north and east, they form a right angle, so we need to calculate the hypotenuse of the triangle for displacement as it is the shortest route between the two points.
Let hypotenuse be h
5² + 5² = h² Moved 5 km in east and north so values are 5h² = 25+25h² = 50h = √50h=5√2Hope it helps
BYE.
An asteroid falls from the sky and exerts 882 N of force on Earth's ground. How much force does it exert on Mars if the gravity on mar is 3.7m/s??
Answer:
333N
Explanation:
=>First you have to find the mass of the asteroid.
so 882N÷9.8m/s²=90Kg
then,multiply it by Mars's gravity
=>90Kg*3.7m/s²=333N
A boy is swimming , identify the action and reaction
Answer:
a person pushes water with his hands in the backward direction is action and water in turns pushes him forward due to force is reaction.
Explanation:
Visual angle is a measure of the A. size an object takes up on the retina. B. actual size of an object. C. object's contrast divided by its spatial frequency. D. angle between the observer and an object. E. perceived size of an object.
Answer:
c
Explanation:
What is the kinetic energy of an 1,850.0-kg car moving at 30.0 m/s? And at 120 km/h?
Answer:
See below
Explanation:
For 30 m/s :
KE = 1/2 mv^2
1/2 (1850)(30^2) = 832500 J
For 120 km/hr :
120 km/hr = 33.333 m/s
KE = 1/2 1850 (33.333)^2 1027777.8 J
9. What voltage is applied to a 20 ohm fixed resistor if the current through the resistor is 1.5 amps?
Question :-
What Voltage is applied to a 20 Ohm fixed Resistor, if the Current through the Resistor is 1.5 Ampere ?Answer :-
Voltage of the Device is 30 Volt's .Explanation :-
As per the provided information in the given question, The Resistance is given as 20 Ohm's . Current is given as 1.5 Amperes . And, we have been asked to calculate the Voltage .
For calculating the Voltage , we will use the Formula :-
[tex] \bigstar \: \: \: \boxed {\sf { \: Voltage \: = \: Current \: \times \: Resistance \: }} [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \Longrightarrow \: \: \: \sf { Voltage \: = \: Current \: \times \: Resistance } [/tex]
[tex] \Longrightarrow \: \: \: \sf { Voltage \: = \: 1.5 \: \times \: 20 } [/tex]
[tex] \Longrightarrow \: \: \: \bf { Voltage \: = \: 30 } [/tex]
Hence :-
Voltage of Device = 30 Volt's .[tex] \underline {\rule {180pt}{4pt}} [/tex]
Additional Information :-
[tex]\Longrightarrow \: \: \: \sf {Voltage \: = \: Current \: \times \: Resistance} [/tex]
[tex] \Longrightarrow \: \: \: \sf {Current \: = \: \dfrac {Voltage}{Resistance}} [/tex]
[tex] \Longrightarrow \: \: \: \sf {Resistance \: = \: \dfrac {Voltage}{Current} } [/tex]
Answer:
30 VoltsExplanation:
Given:
Resistance = 20 ohmCurrent = 1.5 AmperesTo Find:
VoltageSolution:
Using formula:
Voltage = Current × ResistanceBy Substituting the required values,
⇢ Voltage = 1.5 × 20
⇢ Voltage = 30 Volts.
Hence,
The required Voltage is 30 voltshow can I calculate the resistance of a wire 0.70m, radius 3mm and resistivity 2 ×10-6nm
Answer:
The resistance of a cylindrical segment of a conductor is equal to the resistivity of the material times the length divided by the area: R≡VI=ρLA. The unit of resistance is the ohm, Ω.
Explanation:
James passes a magnet over a pile of paperclips and the magnet picks up 2 of the paperclips. Then he passes a different magnet over the pile of paperclips and it picks up 6 paperclips. Which of the
following is NOT a testable
hypothesis that James might develop based on this data?
1. a weaker magnet will pick up more
paperclips than a stronger magnet
2. all magnets pick up paperclips, but the
number of paperclips depends on the
magnet
3. magnets will pick up metal objects but
not plastic objects
4. a stronger magnet will pick up more
paperclips than a weaker magnet
Answer: 2
Explanation:
The statement "All magnets pick up paperclips, but the number of paperclips depends on the magnet" is neither a hypothesis nor testable.
The hypothesis that is not testable based on the given data is magnets will pick up metal objects but not plastic objects. Option C is the correct answer.
The reason this hypothesis is not testable based on the given data is that the information provided only pertains to the number of paperclips picked up by different magnets. It does not provide any information or evidence regarding the ability of magnets to pick up metal objects versus plastic objects. Option C is the correct answer.
In order to test this hypothesis, we would need data or experiments specifically focusing on the interaction between magnets and metal objects as well as magnets and plastic objects. The given data only provides information about the number of paperclips picked up by different magnets, which does not support or refute the hypothesis about the ability of magnets to pick up different materials.
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Native people are
in films.
Select the best answer from the choices provided.
O A. almost always cast in supporting roles
OB. rarely allowed to speak
OC. rarely allowed to display a real personality
OD. All of the answers are correct.
Answer:
D.
Explanation:
all of the options are true.
Why are electron affinity values for the noble gases endothermic?.
Answer:
An electron added to a noble gas must go in the next higher energy level. The periodic trend for electron affinity values is not as consistent as for other trends.
What is a gene? *
A) when a male and a female reproductive cell combine to create an offspring
B) the way something is shaped or constructed
C) a type of large molecule that performs important functions inside organisms
D)an instruction for making a protein molecule
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
The Correct choice is D
Gene are special biomolecules that have all the required information of that organism, and has an instruction for making protein molecules.
What is the process of charging by induction?
What do the lines and numbers on the chromosome represent?
A) Organelles
B) Mutations
C) Genes
D) Proteins
Place the following types of electromagnetic radiation in order from LOWEST energy
to HIGHEST energy?
(A) visible light (B) gamma rays (C) radio waves
1. А, С, В
2.С, А, В
3.В, С, А
4.С, В, А
Placing the electromagnetic radiation in order from the lowest energy to the highest energy : ( 2 ) C,A,B
Electromagnetic spectrumIn the electromagnetic spectrum the electromagnetic radiation with the shorter wavelength possess a higher energy while the electromagnetic radiation with a longer wavelength possess the lower energy.
The electromagnetic radiation as listed in the question with the longest wavelength is the radio waves therefore it possess the lowest energy while the radiation with the shortest wavelength is the gamma rays therefore it possess the highest energy.
Hence we can conclude that Placing the electromagnetic radiation in order from the lowest energy to the highest energy : ( 2 ) C,A,B
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2. Why is natural selection a mechanism for biological change?
Answer:
Natural selection is a simple mechanism that causes populations of living things to change over time. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.
What is the difference between tidal volume and vital capacity.
Tidal volume is the amount of air that moves in and out of the lungs, while vital capacity is the maximum amount of air a person can expel.
What is tidal volume?Tidal volume is the amount of air that moves in or out of the lungs with each respiratory cycle.
What is vital capacity?Vital capacity is the maximum amount of air a person can inhale after a maximum exhalation or maximum amount of air a person can expel from the lungs after a maximum inhalation.
Difference between tidal volume and vital capacityTidal volume is the amount of air that moves in and out of the lungs, while vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation.
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Explain how temperature and particle movement are related.
I need HELP
What kind of wave is produced, if a rope is moved as shown in the image below?
Group of answer choices
Both longitudinal and transverse
Transverse
Neither longitudinal nor transverse
Longitudinal
Answer:
Transverse
Explanation:
The direction of propagation is perpendicular to the motion of the hand. Therefore the wave undergoes a vertical stretching, which is characteristic of transverse waves. Longitudinal waves stretch horizontally.
In a parallel circuit with three resistors connected to a power source, what would happen to the equivalent resistance and current if you removed any one of the resistors? the equivalent resistance would increase and the current would increase. the equivalent resistance would increase and the current would decrease. the equivalent resistance would decrease and the current would decrease. the equivalent resistance would decrease and the current would increase.
Since the equivalent resistance is decreased then current must be increased in the circuit.
What is resistance?Resistance is defined as the obstruction offered by the circuit in the flow of charge or current.
When three resistors are connected in series then the total equivalent of all three is given by
[tex]R_{eq}=R_1+R_2+R_3[/tex]
Also in this case current is given by
[tex]I=\dfrac{V}{R_{eq}}[/tex]
Now if one of the resistance is removed
Then
[tex]R_{eq}=R_1+R_2[/tex]
let one of the resistance is removed
while current flowing in the open circuit will be given by
[tex]I=\dfrac{V}{R_{eq}}[/tex]
So here since resistance is decreased then current must be increased in the circuit.
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Answer:
B. The equivalent resistance would increase and the current would decrease.
Explanation:
A car travels at an average speed of 100km per hour. What distance does it cover in 5hrs
500 km
distance = speed x time
Here given:
speed: 100 km/hourtime: 5 hoursDistance: 100 x 5 ⇒ 500 km
Answer:
500 Km
Explanation:
Speed of the car = 100 km/h
Distance the car covers in 5 hours
= Speed of the car × time
= 100 × 5
= 500 Km
Hope this helps ⚜
The location of a planet relative to the Sun has a lot to do with its _____; whether it is one of the inner terrestrial planets or outer gas giants.
Answer:
Composition.
Explanation:
the inner planets tend to be made up of more solid materials such as iron, while outer planets are made up of primarily gas and ice
Calculate the net force on particle qi.
Finally, add the forces together to find the total
force acting on 01.
Be sure to include a + or - sign to indicate the
direction of the force!
EF = [?]N
Fi = -14.4 N
F2 = +2.28 N
=
=
=
+13.0 uc
+ 91
+7.70 μC
+92
-5.90 με
03
0.25 m
0.30 m
Answer:
-12.12
Explanation:
i just added them together and it worked.
If the wavelength is 6 meters and the period is 2 seconds, what's the wave velocity?
When carbon dioxide is in ocean water it bonds to carbonate, preventing its use by(1 point) coral reefs and shellfish. coral reefs and shellfish. whales and shellfish. whales and shellfish. coral reefs and currents. coral reefs and currents. whales and currents.
When carbon dioxide is in ocean water it bonds to carbonate, preventing its use by coral reefs and currents.
How is carbon dioxide used in the ocean?Carbon dioxide (CO2) is made use of by aquatic photosynthetic organisms to make their own food.
Some examples of aquatic organisms that makes use of carbon dioxide are:
coral reefsalgaeaquatic plantsHowever, when carbon dioxide is in ocean water it bonds to carbonate, preventing its use by coral reefs and currents.
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Answer:
coral reefs and shellfish
Explanation:
Both need carbonate
Worked examples on energy
(2) An express train of mass 600kg is
moving with a velocity of 180km per
hour.
Calculate its kinetic energy.
The kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.
What is Kinetic Energy?Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Mass of the train m = 600kgVelocity of the train V = 180kmh = 50m/sKinetic energy of the train K = ?To determine the kinetic energy of the train, we substitute our given values into the above expression.
K = (1/2)mv²
K = (1/2) × 600kg × (50m/s)²
K = 0.5 × 600kg × 2500m²/s²
K = 750000kgm²/s²
K = 7.5 × 10⁵J
Therefore, the kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.
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Please help I cannot fail!
Water is flowing through a pipe with a velocity of 5 m/s. The pipe has a diameter of 6 cm. The pipe then goes up 3 meters and narrows to a diameter of 4 cm. If the gauge pressure in the lower part of the pipe is 80 kPa, what is the gauge pressure in the higher and more narrow part of the pipe
The gauge pressure in the higher part will be 136 kph. The pressure is found with the help of the Bernoulli equation.
What is gauge pressure?The difference between absolute pressure and atmospheric pressure is known as gauge pressure. Relative pressure is another name for gauge pressure.
From the continuity equation;
[tex]\rm A_1v_1=A_2v_2 \\\\ \rm \frac{\pi}{4}(6)^2 \times 5 = \frac{\pi}{4}(3)^2 v_2 \\\\ v_1 = 20 \ m/sec[/tex]
The gauges pressure in the higher part is found as;
From the Bernoullis equation;
[tex]\rm \frac{P_1}{\rho g} + \frac{v_1^2}{2g} +Z_1 = \frac{P_2}{\rho g} + \frac{v_2^2}{2g} +Z_2 \\\\ \frac{80 \times 10^3 }{\rho g} + \frac{(5)^2}{2g} +0= \frac{p_2}{\rho g} + \frac{(20)^2}{2g} +3 \\\\ \frac{80 \times 10^3 - P_2 }{1000 \times 9.81 } = \frac{20^2-5^2}{2 \times 9.81 } +3 \\\\ P_2 = 136 \ kpa[/tex]
Hence the gauge pressure in the higher part will be 136 kpa.
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Current x is 2.5 a and runs for 39 seconds. current y is 3.8 a and runs for 24 seconds. which current delivered more charge, and how much more charge did it deliver? x delivered 97.5 c more than y. x delivered 6.3 c more than y. y delivered 91.2 c more than x. y delivered 1.3 c more than x.
Given the data from the question,
X delivers more charge than YX delivers 6.3 C more than YDescription of chargeThe charge in a circuit is related to the current and time according to the following equation
Charge (Q) = current (I) × time (t)
Q = it
How to determine the charge delivered by XCurrent (I) = 2.5 ATime (t) = 39 sCharge (Q) =?Q = it
Q = 2.5 × 39
Q = 97.5 C
How to determine the charge delivered by YCurrent (I) = 3.8 ATime (t) = 24 sCharge (Q) =?Q = it
Q = 3.8 × 24
Q = 91.2 C
Difference Charge by X = 97.5 CCharge by Y = 91.2 CDifference = 97.5 – 91.2 = 6.3 CFrom the above calculations, we can conclude as follow:
X delivers more charge than YX delivers 6.3 C more than YLearn more about charge:
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Answer:
BBB
Explanation: