Answer:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.Hope that helps
Explanation:
Which of these is a unit of heat?
A.
joule
B.
watt
C.
kelvin
D.
joule/kelvin
E.
mole
Answer:
D
Explanation:
Both the joule and the kelvin represent heat. Kelvin is a unit of measurement for temperature and joule is more heat energy.
Answer:
Joules
Explanation:
It's heat
⚠️I MARK BRAINLIST I AM BRING TIMED PIC INCLUDED⚠️Match the stage of the product development life cycle to the product that best represents it.
building complex systems
car engines employed for more than one model
reusing technology
sophisticated jet airliners
pushing a technology to market
the latest iPhone version
Which of the following sentences are written correctly verbs
a torque of 24 ft pounds is the result when a force of ______ pounds is applied to a wrench that is 18 inches long.
Answer:
16
Explanation:
The product of feet and pounds is the torque. 18 inches is 1.5 feet.
(1.5 ft)(x lbs) = 24 ft·lbs
x lbs = (24 ft·lbs)/(1.5 ft) = 16 lbs
The force will be 16 pounds applied to an 18-inch wrench to obtain 24 ft·lbs.
Answer:
16
Explanation:
Which option identifies what process should be used as a model for design in the following scenario?
John is developing a handheld camera, unlike any others that have been developed before. Even though he understands what the final product will be, it still requires further development and modification.
A. engineering design process
B. reverse engineering process
C. structural process
D. brainstorming process
Answer:
A. engineering design process
Explanation:
We are told that John is trying to develop a handheld camera. And that it is unlike any other one that has been developed before.
Now, though he understands what the final product will look like, the camera still required further development and modification. This is simply an engineering design process because it involves finding a need and trying to solve it since he already understands what the final product will be.
Avionics mechanics, or service technicians, are responsible for which of the following related to aircraft maintenance? (Select all that apply.)
engine
inspecting exterior of plane
landing gear
valves
Answer:
all of them
Explanation:
Because I had this question. :)
Good luck with you assinment.
What is a smooth flow of air over a surface is called?
Answer:
laminar flow
Explanation:
In fluid dynamics, laminar flow is characterized by fluid particles following smooth paths in layers, with each layer moving smoothly past the adjacent layers with little or no mixing.
How much salt will one teaspoon of water dissolve? Complete this experiment to find out!
Materials:
salt
a small glass jar with a lid
water
measuring spoons
Follow these steps:
Carefully measure out 3 Tablespoons of cold water into the jar.
Now measure out 1/8 teaspoon of salt and put it into the jar with the water. Put the lid on the container and shake it. Keep shaking until the salt is completely dissolved. To determine whether it has completely dissolved, hold the container up to the light and look carefully at the bottom, or open the lid and look into it. If you see little grains of salt there, it is not completely dissolved, so keep shaking until it looks the same each time you look.
If the salt does not dissolve completely after five minutes of vigorous shaking, write this in your notebook and go on to step 4. If the salt dissolves completely, add another 1/8 teaspoon of salt and repeat the process. Repeat over and over, keeping track of how many 1/8 teaspoons you add. Stop when you can’t get the salt to dissolve no matter how hard or long you shake the container.
Record how much salt you were able to dissolve in the 3 Tablespoons of water in the solubility data table.
Repeat steps 1-4, but this time using very warm or hot water. Before you do it, run the jar under hot water to warm it up so the water doesn’t cool off right away. Be sure to use the exact same amounts of water and salt as you did the first time. The only variable should be the temperature of the water.
Record your results, and then compare with your previous results.
Answer the following questions:
Were there any differences in the amount of salt that dissolved in the warm water versus the cold water?
Write a conclusion based on your results, using the terms “temperature” and “solubility.”
Based on your results, answer this question: If the oceans of the earth got warmer from global warming, would the water of the oceans become more or less salty? What do you think the effect of this change in the ocean salinity (saltiness) would be on the plants and animals that live in the ocean?
Once you have completed the activity and answered all the questions, turn your assignment in here. To see how this assignment will be graded, click tHow much salt will one teaspoon of water dissolve?
Answer:it took 4 1/8th teaspoons
Explanation:
Answer:
The answer is on the document (not a link and won't break your device, promise).
Explanation:
10) A roller coaster has a circular loop of radius 5.0 m. You go around at the minimum speed.
How fast will you be moving at the bottom?
What is your acceleration? (in m/s2, in g’s)
How does this feel? Where else have you felt this effect?
Draw a Force Diagram at the bottom.
This is dangerous. What should the radius be at the bottom, so that you only feel 2 g’s?
.
Explain why these loops have the shape that they do.
Answer:
1) The speed of the roller coaster at the bottom is approximately 15.65 m/s
2) The acceleration of the roller coaster at the bottom is 6·g's
3) The high acceleration is 6 times the force of the weight of the passengers
The high acceleration can cause gravity induced loss of consciousness
4) Please find attached a force diagram of the forces at the bottom of the roller coaster created with Microsoft Visio
5) For the acceleration at the bottom to be 2·g's the radius of the rollercoaster at the bottom should be 25 meters
5) The radius at the bottom of roller coasters are increased to reduce the normal force felt by the passengers as they pass the bottom of a circular roller coaster
Explanation:
1) The given parameters are;
The radius of the roller coaster, r = 5.0 m
The speed of the roller coaster = Minimum = 0 m/s
The shape of the roller coaster's path = Circular loop
Therefore, the maximum height of the roller coaster, h = The diameter of the of a circular path of the roller coaster, d = 2 × r = 2 × 5.0 m = 10.0 m
∴ h = 10.0 m
The minimum speed is f=given by the following equation;
[tex]F_N = \dfrac{m \cdot v^2}{R} - m \cdot g = 0 \ (At \ the \ top \ of \ the \ roller \ coaster's \ path)[/tex]
Therefore, we have;
[tex]\dfrac{m \cdot v^2}{R} = m \cdot g[/tex]
From which we have;
v = √(R × g)
Where;
R = The radius of the path of the roller coaster = 5.0 m
g = The acceleration due to gravity = 9.8 m/s² = constant
By plugging in the values of the variable, 'R', and the constant, 'g', we get;
v = √(5.0 m × 9.8 m/s²) = 7 m/s
The minimum speed of the roller coaster, v = 7 m/s
The speed of the roller coaster at the bottom is given by the conservation of energy formula as follows;
The energy at the top of the roller coaster = The energy at the bottom of the roller coaster
∴ The total mechanical energy of the roller coaster, M.E., is constant and at the top, [tex]M.E._{top}[/tex], is given as follows;
[tex]M.E._{top}[/tex] = 1/2·m·v₁² + m·g·h₁
At the bottom, the total mechanical energy is given as follows;
[tex]M.E._{bottom}[/tex] = 1/2·m·v₂² + m·g·h₂
Where;
v₁ = The velocity of the roller coaster at the top = 7 m/s
h₁ = The height of the roller coaster at the top = 10 m
v₂ = The speed of the roller coaster at the bottom
h₂ = The height of the roller coaster at the bottom = 0 m
g = The acceleration due to gravity = 9.8 m/s² = Constant
By plugging in the values, we get;
M.E. = [tex]M.E._{top}[/tex] = [tex]M.E._{bottom}[/tex]
∴ 1/2·m·v₁² + m·g·h₁ = 1/2·m·v₂² + m·g·h₂
1/2 × (7 m/s)² + 9.8 m/s² × 10.0 m = 1/2 × v₂² + 9.8 m/s² × 0 m
122.5 m²/s² = 1/2 × v₂²
∴ v₂² = 2 × 122.5 m²/s² = 245 m²/s²
v₂ = √(245 m²/s²) = 7·√5 m/s ≈ 15.65 m/s
The speed of the roller coaster at the bottom, v₂ ≈ 15.65 m/s
2) The normal force on the car at the bottom of the roller coaster is given as follows;
[tex]F_N = \dfrac{m \cdot v_2^2}{R} + m \cdot g = m \times \left(\dfrac{ v_2^2}{R} + g \right )[/tex]
Force, F = Mass, m × Acceleration, a
∴ F = m×a
Therefore, the acceleration at the bottom, 'a' by comparison of the general equation for force, 'F', and the normal force, [tex]F_N[/tex], is given as follows;
[tex]a = \left(\dfrac{ v_2^2}{R} + g \right )[/tex]
Plugging in the values for 'v₂²', 'R', ang 'g', gives;
[tex]a = \left(\dfrac{ v_2^2}{R} + g \right ) = \left(\dfrac{ 245}{5} + 9.8 \right ) = \left(49+ 9.8 \right ) = (5 + 1) \times 9.8 = 6 \times 9.8 = 6 \times g[/tex]
a = 6·g = 58.8 m/s²
3) The high acceleration will lead to a very high normal force (equal to 6 times each of their weight) experienced by the passengers with a force
The high acceleration is dangerous and can lead to gravity induced loss of consciousness since it is more than 3·g's
4) Please find attached the force diagram at the bottom of the roller coaster created with Microsoft Visio
5) For the acceleration at the bottom to be 2·g's, we have;
[tex]a = \left(\dfrac{ v_2^2}{R} + g \right )[/tex]
At a = 2·g, we have;
[tex]2 \cdot g = \left(\dfrac{ v_2^2}{R} + g \right )[/tex]
[tex]\therefore 2 \cdot g - g = g = \dfrac{ v_2^2}{R}[/tex]
[tex]R = \dfrac{ v_2^2}{g} = \dfrac{245}{9.8} = 25[/tex]
R = 25 m
The radius at the bottom of the roller coaster should be 25 meters so that only 2·g's is felt
5) The shape of the roller coaster has an increases the radius at the bottom so as to reduce the acceleration of the car
Question # 7
Long Text (essay)
In paragraph of 125 words, explain at least three ways that engineers explore possible solutions in their projects
Answer:
To do this, engineers often use a technique called "brainstorming." Brainstorming is a team creativity activity that helps you generate a large number of potential solutions to a problem or challenge.
Engineers use the engineering design process when brainstorming solutions to real-life problems; they develop these solutions by testing and redesigning prototypes that work within given constraints.
Engineers will often use reverse-engineering to solve problems. For example, by taking things apart to determine an issue, finding a solution and then putting the object back together again. Engineers know how things work, and so they constantly analyse things and discover how they work.
Safeguarding personal data and personal wealth from cyberattacks. ...
Addressing climate change through engineering innovation. ...
Feeding the growing world population through cutting-edge bio-engineering and agricultural innovations. ...
Improving health and well-being through life sciences, nanotechnology, and bio engineering.
MARK ME AS BRAINLISTAnswer:
1) Prototyping is the process of experimental testing of samples of design, or model of a product with the possibility of the inclusion of control of parameters in order to determine the workability of a solution.
2) Simulation is the process of creating an imitation of a situation, operation or process which can be used to determine if a particular solution will be able to work as required in the simulated environment of a problem.
3) Calculations are used to find preliminary results of particular situations, their cause and effects based on scientific laws, theories and hypothesis such that the factor of the problem is equated with the available ideas to find the best possible solution.
Explanation:
ASAP correct answer plss When you are driving, if you see this traffic sign it means
A: There is a low place in the road. You should drive slowly and be ready to stop if the low place is
filled with water.
B: The road slopes gently downward and upward ahead. You should continue at the same speed if
the way is clear.
C: There is a downhill section of road ahead. If you are driving a large vehicle you should change
to a lower gear to control your speed.
Answer:
C
Explanation:
2. It is a measuring instrument used to record the amount of
electrical consumption.
A. clamp meter B. micrometer
B.micrometer
C. steel rule
D. electric meter
Answer:
The correct option is;
D. Electric meter
Explanation:
An electric meter is a metering device that is used for the measurement of the electric power consumption of an electrical powered tools, a living space or a building
Electric meter readings are used by electric utility company to sell electric power to consumers at a given rate such that it allows the electric utility company to receive payment for the total power supplied, and for the consumer to regulate the amount of power consumed
The electric meters are usually calibrated in kilowatt hour (kWh) and prepaid meter displays the amount of units of power bought, while post paid meters are usually read once each billing period which is usually one month.
Why are the main cables of the Golden Gate Bridge made of numerous smaller cables?
Answer:
The main cables of the Golden Gate Bridge are made of numerous smaller cables because by combining several thousand in number of smaller cables, each having a diameter which is approximately the diameter of a pencil, into the required cable diameter dimensions, the flexibility, strength, resistance to cracking, rotation resistance, crushing resistance and fatigue resistance of the main cables are increased, and failure of a few strands in a multi-stranded cable is more likely to be detected before catastrophic failure takes place than in a single cable
The properties of strength and flexibility that the cable provides are required so that the bridge can better cushion the seismic turbulence of the water and strong wind energy at the bay of San Francisco, the location of the bridge
Explanation:
A gear train has a ratio of 40/24 and the driving gear is turning 100 RPM.
What is the speed of the driven gear in RPM?
Answer:
S2 = 60 RPM.
Explanation:
Given the following data;
Gear ratio = 40/24 (T2 = 40 and T1 = 24).
Speed of driving gear = 100 RPM
To find the speed of the driven gear;
Mathematically, gear ratio in terms of speed (RPM) is given by this formula;
[tex] S_{1} * T_{1} = S_{2} * T_{2} [/tex]
Where;
S1 represents the speed of the driver gear.S2 represents the speed of the driven gear.T1 represents the number of teeth of the driver gear.T2 represents the number of teeth of the driven gear.Substituting into the equation, we have;
[tex] 100 * 24 = S_{2} * 40[/tex]
[tex] 2400 = 40S_{2} [/tex]
[tex] S2 = \frac {2400}{40} [/tex]
S2 = 60 RPM.
Therefore, the speed of the driven gear is 60 revolutions per minute.
____________engineers build and test tools and machines, and they rely heavily on computer, math, and problem-solving skills.
Answer:Mechanical Engineers
Explanation: Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.
Answer:
what they said. they were correct
Explanation:
HELP PLS
Is a book a solid, frame, shell or combination and WHY
How did Ronald McNair change the face of science?
Answer: Through Physics
Explanation:
He changed the world of science through laser physics, he had a phD in science.
What he really did was amazing where he focused on such tasks as the development of lasers for isotope separation and conducted research on electro-optic modulation for satellite space communications.
He was also a astronaut for the 1986 space module Challenger. Sadly, Challenger exploded due a malfunctioning in the tank, it overheated and killed the entire crew along with Mr.Ronald.
Hope this helps and make sure to thank me!
PLEASE HELP!! Its easy!!!
Answer:
C is tire
F is cassette
D is hub
Answer: give me brainliest, fellow hamster friend
Explanation:
Technician A says a sway bar is used to control body lean when cornering.
Technician B says that adding additional leafs to a Leaf Spring increases its
capacity. Which is correct?
Technician B only
Answer:
technician B
Explanation:
because adding leaves increasing capacity
During the production of a mobile phone, the manufacturing company stops the assembly line because it has run out of a particular raw material. What kind of waste is this?
A.
transportation
B.
overproduction
C.
over-processing
D.
motion
E.
waiting
Answer:
B. or C.
Explanation:
You have to guess one of them. sry
The Marion County School District is planning to build a new elementary school near a commercial district. Which of the following types of construction companies would be best for the job?
A.Commercial
B.Institutional
C.Residential
D.Industrial
Answer:
B or C
Explanation:
Commercial has to be for things like political and industrial is for making/providing things
What is the difference between Material Safety Data Sheets and Safety Data Sheets?
Safety Data Sheets do not include protective measures
Safety Data Sheets do not include health effects
Safety Data Sheets must have 16 user-friendly sections
There are no differences
Answer:
MSDS is Material Safety Data Sheets, whereas SDS just Safety Data Sheets
Explanation:
A: i do not know what answer is
How many parts (screws and bolts included) does the average car have?
Answer:
Explanation:
30,000 parts
A single car has about 30,000 parts, counting every part down to the smallest screws.
The total number of parts (screws and bolts included) of the average car is around 30,000.
What are the basic parts of the car?The radiator can be described as a heat exchanger used to eliminate heat from the coolant in the cooling system to prevent the vehicle’s engine from overheating. The hot coolant is routed via the radiator, where the coolant exchange heat with the passing air.
The AC Compressor pumps coolant throughout the system and starts the process of the cooling car. The battery saves energy in chemical form so it is released as electricity to run the vehicle’s electrical components.
The front and rear axles are supporting a vehicle where the wheel hubs are attached. Axles are part of the suspension system and are responsible for delivering power to the wheels from the engine via the transmission and differential.
A car’s brakes can be used to stop or slow a vehicle or prevent it from moving when parked or stopped.
Learn more about parts of automobiles, here:
https://brainly.com/question/800372
#SPJ2
Where does Henrietta think William might be?
the park
the cemetery
his favorite restaurant
Answer:
The cemetery
Explanation:
Answer:
B.) CEMETERY
Explanation:
Have a nice day!
The ________________ attraction between the Earth and the moon is ______________ on the side of the Earth that happens to be ____________ the moon, simply because it is ________. This attraction causes the water on this “_________” of Earth to be pulled ___________ the moon.
Answer:
Gravitational; strongest; facing; closer; near side; toward.
Explanation:
The gravitational attraction between the Earth and the moon is strongest on the side of the Earth that happens to be facing the moon, simply because it is closer. This attraction causes the water on this “near side” of Earth to be pulled toward the moon. These forces of attraction and inertia tends to keep the water in place and consequently, leads to a bulge of water on the near side with respect to the moon.
Also, you should note that what is responsible for the moon being in orbit around the Earth is the gravitational force of attraction between the two planetary bodies (Earth and Moon).
What is the potential consequence of online impulsive buying?
a.
Better managed monthly budget
b.
Tendency to buy unnecessary goods
C.
Wiser decision making when purchasing
d.
Earned discount vouchers from the store
bruuh its sum werid people on brainly
Answer:
what happend??
Explanation:
Is a desk/table a solid, frame, shell or combination
The final position of a car can be predicted with the following equation: Position = -2.5 (time) + 25 Where is the car’s position at 3.0 seconds? When would the car reach position 0.0 meters?
Answer:
The car's position at 3.0 seconds is 17.5 meters. The car will reach 0.0 meters at 10 seconds.
Explanation:
You can rewrite the equation as P= -2.5t+25. t=time and P is equal to position; so you will plug in 3.0 seconds into t. The equation will now look like: P = -2.5(3.0)+25
P = -2.5(3.0) + 25
P = -7.5 + 25
P = 17.5 meters
Now, to find when the car reaches 0.0 meters, we will plug that into P since P = position and will solve for t.
P = -2.5t + 25
0.0 = -2.5t + 25
-25 -25
-25 = -2.5t
-25/-2.5 = -2.5t/-2.5
10 = t
So the car will reach 0.0 meters at 10 seconds.
DEFINE NEUTRALIZATION REATION?
Answer:
I would go with when acid and a base react quantitatively with each other. as my answer for that
