Answer:
C, B, D, A
Explanation:
Stress is F/A, where F = 9.8*mass and A = pi(d/2)^2
Do the math for each and the stress from least to greatest is C, B, D, A.
The height column is unnecessary information.
When four different cylinders(A,B,C,D) were each subjected to a force by placing four different masses on top of them. the Rank of stress on these cylinders from least to greatest is D, C, B, A.
What is Stress ?Stress is defined as applied force(F) per unit cross sectional area(A) on which force is applied. it I.e. Stress = F/A. its SI unit is N/m². More force on small area leads to higher stress.
Given,
For A
Mass m = 5.2 kg
Diameter = 2.6 cm
Radius r = 1.3 cm = 0.013 m
Height = 32.5
Stress on A = Force ÷ A = mg ÷ πr²
Stress = (5.2×9.8) ÷ (3.14×0.013²)
Stress = 96031 N/m²
For B
Mass m = 3.6 kg
Diameter = 2.3 cm
Radius r = 1.15 cm = 0.011 m
Height = 27.3
Stress on B = Force ÷ A = mg ÷ πr²
Stress = (3.6 ×9.8) ÷ (3.14×0.011 ²)
Stress = 92856 N/m²
C
Mass m = 4.7 kg
Diameter = 2.7 cm
Radius r = 1.35 cm = 0.0135 m
Height = 16.9
Stress on C= Force ÷ A = mg ÷ πr²
Stress = (4.7 ×9.8) ÷ (3.14×0.0135²)
Stress = 80487 N/m²
D
Mass m = 2.9 kg
Diameter = 32.2 cm
Radius r = 16.1 cm = 0.16 m
Stress on D = Force ÷ A = mg ÷ πr²
Stress = (2.9×9.8) ÷ (3.14×0.16²)
Stress = 353 N/m²
Hence Rank of stresses on the 4 cylinders are D, C, B, A
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Describe the moons of Mars?
Answer:
The two moons of Mars are Phobos and Deimos. They are irregular in shape. Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek mythological twin characters Phobos (fear) and Deimos (panic) who accompanied their father Ares into battle, SO they were irregular in shape
Explanation:
Can someone please help me with science
Answer:
The mass is one of the factors affecting gravitational field strength.
Weight (Force) = mass × gravitational field strength
= 0.10 × 10 (10 is the fixed gravitational field strength on Earth)
= 1.0 N
Differentiate between:
Transverse wave and Longitudin
Crest and Trough
Answer:
Crest is the highest point that a wave reaches and… Trough the lowest point that a wave reaches............Transverse waves are waves whose particles vibrate at right angles to the direction of wave travel e.g water wave. .....,.......longitudinal I think it's not "longitudin" are waves whose particles vibrate in a direction parallel to the direction of wave travel e.g sound wave
a microwave with a frequency of 5.0 x 10 2 hertz has a period of
Hello,
QUESTION)✔ We have: T = 1/f; with T in s, and f in Hz
T = 1/5,0 x 10² Hz T = 2,0 x 10⁻³ sThe period of the microwave is therefore 2 ms.
Answer:
2.0x10^-11
Explanation:
T=1/f
T=1/5.0x10^10
T= 2.0x10^-11
a subwoofer is a type of speaker which plays only the very low notes in a song or movie, which following frequencies would you expect to be able to hear from a subwoofer
10hz
25hz
750hz
1,050hz
Answer:
25z
Explanation:
If the pelican was traveling 8.79 m/s but was only 2.7 m above the water, how far would the fish travel horizontally before hitting the water below?
Answer:
6.52m
Explanation:
The horizontal distance travelled is known as its range. This is expressed as;
Range = u* √2H/g
u is the speed of the pelican
H is the maximum height
g is the acceleration due to gravity
Range = 8.79*√2(2.7)/9.8
Range = 8.79 * √5.4/9.8
range = 8.79*√0.5510
Range = 8.79*0.7423
Range = 6.52
Hence the fish will travel 6.52m before hitting the water below
3. Determine the units of the quantity described by the following com-
binations of units:
a. kg (m/s) (1/s)
b. (kg/s) (m/s2)
c. (kg/s) (m/s)
d. (kg/s) (m/s)
how is urine produced
Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.
Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.
1. Which of the following decreases with an increase in altitude?
a. air pressure
b. visibility
c. water vapor
d. none of the above
Answer: air pressure
Explanation:
If you know any of them, please help!!!!!!
I believe the answer for 1) is
PEgrav = mass • g • height
PEgrav = m *• g • h
An ipod uses a standard 1.7 volt battery. How much resistance is in the circuit if it uses a current of 0.03 amps
Answer:
R = V ÷ I = 1.5V ÷ 0.01A = 150Ω
Explanation:
150 is the answer:)
HELP MY GRADES-
question: If you see a lightning flash, and you hear the thunderclap one second later, how far away is that lightning?
SCRABBLE LETTERS: For a word from the given letters related to TEAM SPORT
1. ATKELBSLLA-
6. VERATGLNIL -
2. LSFLOTBA-
7. LAVLOLEBYL -
A ICRO -
8. LOFU-
4. EFERERE-
9. GINNIN -
5. PERIMU -
10. HOTIGNSO -
Answer:
1. BASKETBALL
A team sport that is placed in an indoor basketball court between two teams.
2. SOFTBALL
A team sport plays in an outdoor stadium or ground. It is similar to a baseball game.
3. COURT
A court is a place where any indoor game or team sport takes place.
4. REFEREE
A referee is a person or official that watches a game closely and decides if the game is played with rules or not.
5. UMPIRE
An umpire is a field official to look after the game to see if everything is according to the rules.
6. TRAVELLING
7. VOLLEYBALL
It is also team game plays in open field or beach between two teams where a net is placed between the teams.
8. FOUL
Foul is a penalty for breaking the rule of the game decides by umpire or refree.
9. INNING
An inning is the part of the game which is played by one of the team
10. SHOOTING
A yo-yo is twirled on a 4 meter long string so that its tangential
speed is 16 m/s. If the string is only 2 meter long and the revolutions per
second stay constant, what is the new tangential speed?
Answer:
8m/s
Explanation:
i think i had this question on a test i'm taking so i'm assuming i cannot say for sure if this is correct
If the distance between two spherical charged objects increases by a factor of two, then the electrical force between the objects
Answer:a repulsive electrical force. ... postulates that an electric field surrounds each charged object. If the distance between two spherical charged objects increases by a factor of two, then the electrical force between the objects. decreases by a factor of four.
Explanation: does this help
11. What are mechanical waves caused by?
Answer: mechanical waves are caused by the disturbance of vibration in matter, whether solid, gas, liquid, or plasma.
Explanation:
describe the working principle of a hydraulic press using Pascal's principle.
Answer:
A hydraulic press works on the principle of Pascal's law, which states that when pressure is applied to a confined fluid, the pressure change occurs throughout the entire fluid. Within the hydraulic press, there is a piston that works as a pump, that provides a modest mechanical force to a small area of the sample.
not my answer but i hope it helps
Explanation:
Why are temperatures of the currents generally colder at the poles than the equator?
A. Tilt of the Earth on its axis
B. Angle of the sun's rays are less direct
C. Angle of the sun's rays are more direct
D. The Earth's revolution around the sun.
Answer:
the answer is A
Explanation:
Describing Energy Transformations
This activity will help you meet this educational goal:
You will write an explanation of a process using precise language and vocabulary.
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the
end of the activity, write a brief evaluation of your work.
Activity
In this activity, you will analyze some events and describe the energy transformations that take place.
Part A
A battery powers a circuit for a small noisy fan. The fan's motor gets warm as it turns. What energy transformations are
taking place?
Answer:
chemical energy to electrical energy to sound energy to heat energy
Answer:
chemical energy to electrical energy to sound energy to heat energy
Explanation:
I. Is the moon luminous or non-luminous? Give a reason for your answer.
Answer:
non-luminous
Explanation:
Moon doesn't give off light of its own, that's why the moon is considered a non-luminous body
Ultraviolet rays are more likely to give you a sunburn than visible light. What statement would be the best possible explanation for this?
Answer : Visible light cannot penetrate the skin. Ultraviolet rays have a higher frequency and therefore have more energy.
Explanation:
A burst of sound takes 0.4 seconds to reach the seabed and return, if speed of sound in water is 1400m/s. what is the depth of water?
Explanation:
Given:
Speed of sound = 1400 m/s
Total time taken = 0.4 seconds
To find:
The depth of water
Solution:
As it take 0.4 seconds for the burst to reach the seabed and return (both ways), we can deduce that it takes 0.2 seconds to reach the seabed (one way).
This is because the speed of sound is a constant.
Now, to find the depth, we use the equation
Speed = Distance/Time
Here, we know the values of speed (1400 m/s) and time (0.2 seconds). Distance is the depth of the water, which we need to find. Let the distance be x.
Therefore
1400 = x/0.2
x = 1400 * 0.2
x = 280 m
We get the depth as 280 metres.
Feel free to ask me if you didn't understand any part.
Hope this helps! :D
When a hot object makes a cold object warmer what is it called
A car can go from 20 m/s to 0 m/s in 5 second using 7,000N worth of force. How much mass does the car have?
Answer: a lot of MASS
Explanation:
Is positive charge in
the nucleus of an
atom of an element
equal to its atomic
number?
Answer:
yes the nucleus of an
atom of an element
equal to its atomic
number
how do I measure the wavelength/amplitude
Answer:
The wavelength can always be determined by measuring the distance between any two corresponding points on adjacent waves. In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction.
Explanation:
Thank me later
Answer:
Explanation:
So what you want to do is measure the wavelength for the wavelength by putting the ruler under or above the distance (show in picture).
amplitude you want to measure it inside of the wave. so when measuring move the ruler sideways.
( i hope this makes sense)
why do colliding objects of unequal mass experience different effects
A 5 kg cart moving at 2 m/s collides with a 10 kg cart that is at rest. What happens to the momentum of the 5 kg cart after the collision? *
Answer:
The velocity stays the same
Explanation:
Given data
Mass M1= 5kg
U1=2m/s
V1=???
Mass M2= 10kg
V2= 0m/s
U2=0m/s
We know that the law of conservation of linear momentum is expressed as
M1U1+M2U2= M1V1+M2V2
substitute
5*2+10*0=5*V1+10*0
10=5V1
V1= 10/5
V1= 2 m/s
The 5kg mass will bounce back with a velocity of 2m/s
Hence the velocity stays the same
How much electrical energy is consumed by a motor of 1 horse power in 1 second?
Answer:
22.38 kW
Explanation:
A 1 HP motor is supposed to deliver power equivalent to 746 Watts, or in other words, the rotational mechanical energy delivered by the shaft of the motor is rated to be equal to 746 Watts or .746 kW. This .746 kW is the net result delivered by the shaft of the motor “after” overcoming losses from the total power consumed by the motor from its input source, wherein there are losses attributed to mechanical friction, electrical losses within the motor, sound, heat, etc. This difference between the electrical power consumed by the motor from the “input” source and the mechanical energy delivered from the “output” source (shaft) is defined as performance efficiency, which is mostly around 80% in most motors.
Now, presuming that your motor performs at 80% efficiency, the total power it consumes will be .746 kW/80 X 100 = 0.9326 kW/hour.
Therefore, if you keep the motor running for 24 hours, the total power consumption will be 0.9326 kW X 24 Hours = 22.38 kW
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To open a soda can lid, you can apply a force of 50 N to a car key wedged under
the lid. The car key applies a force of 390 N to the lid. What is the mechanical
advantage of using the car key to open the can lid?
Answer:
7.8
Explanation:
Here, an effort of 50 N is applied at the car key and overcomes the resistance(or load) of 390 N at the lid.
mechanical advantage
=load/effort
=390 N/50 N
=7.8