which of the following is likely to be made from thermoplastic
Answer:
what are the choices
Explanation:
The scientific name for a plant that reproduces with spores is a(n)
A car turns into a driveway that slopes upward at a 9 degree angle, car is moving at 6.5 m/s. If the driver lets the car coast, how far along the slope will the car roll before being instantaneously at rest and start rolling back? Please show kinematic steps. Thanks!
To find the distance the car will roll along the slope before coming to rest, we can use the kinematic equation. Substituting the given values for initial velocity, acceleration due to gravity, and angle of the slope, we can calculate the distance traveled.
Explanation:To find the distance the car will roll along the slope before coming to rest, we can use the kinematic equation:
v² = u² + 2as
where v is the final velocity (0 m/s in this case), u is the initial velocity (6.5 m/s), a is the acceleration (-g*sinθ,-g*sin9°), and s is the distance traveled. Rearranging the equation, we get:
s = (v² - u²) / (2a)
Substituting the values, we can calculate the distance traveled along the slope using the given acceleration due to gravity and the angle of the slope.
Final answer:
To determine the distance the car will roll along the slope before being at rest and rolling back, we can use kinematic equations. The car will roll approximately 15.5 meters before being instantaneously at rest and starting to roll back.
Explanation:
To determine how far the car will roll along the slope before coming to rest and rolling back, we can use kinematic equations. The key here is to find the time it takes for the car to reach zero velocity, which will then allow us to calculate the distance traveled.
First, let's find the acceleration of the car along the slope. The component of gravity parallel to the slope is 9.81 m/s2 * sin(9°), which gives us an acceleration of 1.6 m/s2.
Using the kinematic equation, v2 = u2 + 2as, where v is the final velocity (which is zero), u is the initial velocity (6.5 m/s), a is the acceleration (-1.6 m/s2), and s is the distance along the slope, we can solve for s. Rearranging the equation, we get s = (v2 - u2) / (2a). Plugging in the values, we find that the car will roll approximately 15.5 meters along the slope before being instantaneously at rest and starting to roll back.
FOR EACH GROUP OF TERMS, WRITE A SENTENCE THAT SHOWSHOW THE TERMS ARE RELATED:
1. position: time: motion
2. speed: motin
3.speed: distance: time
4. velocity: speed
5. time: distance: direction: velocity ...?
Why does the damage in the nervous system cause paralysis of the body?
Final answer:
Damage to the nervous system, especially the spinal cord, interrupts communication between the brain and body, leading to paralysis. The inability of spinal nerves to regenerate makes spinal cord injuries particularly severe and difficult to treat. With around 10,000 cases annually in the U.S., seeking effective treatments remains a challenge.
Explanation:
Why does the damage in the nervous system cause paralysis of the body? Damage to the nervous system, particularly the spinal cord, can result in paralysis due to the interruption in the communication between the brain and other parts of the body. The spinal cord acts as an information superhighway, and when it is damaged, this can prevent the brain from sending and receiving messages to the body, leading to a loss of sensation and movement below the injury level.
Spinal cord injuries are particularly severe because most nerve tissues, including those in the spinal cord, are not capable of regeneration, leaving many people permanently paralyzed. In the United States alone, there are around 10,000 spinal cord injuries each year. The extent of paralysis depends on the injury's location along the spinal cord and whether the injury was complete.
For example, damage at the neck level can result in paralysis from the neck down, affecting all four limbs (quadriplegia), while damage lower down may cause paralysis of the legs (paraplegia). Despite ongoing research, including stem cell transplants and efforts to reduce post-injury inflammation, treating spinal cord injuries remains a significant challenge due to the inability of spinal nerves to regenerate effectively.
If we wanted to describe and better understand the structure of the rings of Saturn, we might develop a
scale. system. machine. model.
PLEASE HELP ME THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PLZ!!!!!!!!!!
A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center O. A rope wrapped around the outer radius R1 = 1.0m, exerts a force F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2 = 0.50 m exerts a force F2 = 6.0 N downward. What is the angular acceleration of the disk? ...?
Answer:
∝=0,4[tex]s^{-2}[/tex] (angular acceleration)
Explanation:
We give you the equation of the sum of all torques:
∑τ=I*∝
Then we replace the torques :
F1*R1-F2*R2=I*∝ The inertia of a cylinder mass that pivot arround the axis in the center of it is: [tex]\frac{MR1^{2}}{2}[/tex], so then we can replace. don't confuse the R1 of the intertia of the cylinder, with the R2 of the F2. And also you must consider the direction of forces, and your reference system, in this case i choose clockwise, that's why my F1 is possitive, and my F2 is negative.[tex]\frac{F1*R1-F2*R2}{I} =\alpha[/tex][tex]\frac{5N*1M-6N*0,5M}{\frac{10KG*1M^{2} }{2} }= \alpha[/tex][tex]\frac{2*(5N.M-3N.M)}{10KG*1M^{2} }= \alpha[/tex][tex]\frac{(2N.M)}{5KG*1M^{2} }= \alpha[/tex][tex]\alpha =0,4s^{2}[/tex]Agility refers to a persons level of flexibility true or false
Answer: false
Explanation:
Agility is the ability of a body to change position efficiently.
An example is a dancer who moves the body quickly while dancing.
It is also a combination of balance, coordination, speed, reflexes, strength and endurance.
To calculate the velocity of an object the of the position vs time graph should be calculated
Explanation:
The velocity of an object is given by the rate of change of position as :
[tex]v=\dfrac{dx}{dt}[/tex]
where
[tex]\dfrac{dx}{dt}[/tex] is the rate of change of velocity
From the position time graph of an object, the velocity of an object can be calculated using the slope of the graph. From the attached figure it is clear that the velocity is given by :
[tex]m=\dfrac{x_2-x_1}{t_2-t_1}[/tex]
[tex]m=\dfrac{20-10}{2-1}[/tex]
m = 10
i.e.
Velocity, v = 10 m/s
Hence, to calculate the velocity of an object the slope of the position vs time graph should be calculated
Consider the two vectors A(with arrow above)=5i-3j and B(with arrow above)=-i-2j
1. Calculate A (with arrow above) + B (with arrow above)
2. Calculate A (with arrow above) - B (with arrow above)
3. Calculate absolute value of A (with arrow above) + B (with arrow above)
4. Calculate absolute value of A (with arrow above) - B (with arrow above)
5. Calculate the directions of A (with arrow above) + B (with arrow above) and A (with arrow above) - B (with arrow above).
(answers are counterclockwise from the +xaxis) ...?
Answer:
9j-
Explanation:
Weather changes occur primarily because of
heat exchange between the ocean and atmosphere.
heat exchange between the sun and atmosphere.
incoming solar radiation.
large quantities of fossil fuels burned in the atmosphere.
Final answer:
Weather changes occur primarily due to heat exchange between the ocean and atmosphere, heat exchange between the sun and atmosphere, and incoming solar radiation.
Explanation:
Weather changes occur primarily because of heat exchange between the ocean and atmosphere, heat exchange between the sun and atmosphere, and incoming solar radiation.
Oceans have a significant effect on weather and climate because their high heat capacity acts as a temperature buffer. The ocean absorbs most of the radiant heat from the sun, and ocean currents help distribute this heat.
Additionally, weather changes are influenced by variations in solar energy reaching Earth and changes in the reflectivity of Earth's atmosphere and surface.
Final answer:
Weather changes occur primarily because of incoming solar radiation, which heats the Earth's surface and drives atmospheric circulation. Ocean currents also contribute by redistributing heat, while human-induced climate change affects long-term patterns.
Explanation:
Weather changes occur primarily because of incoming solar radiation, which is the most important factor influencing climate. This solar energy heats the Earth's surface, resulting in the temperature of the air above it. The uneven heating of different parts of Earth's surface leads to the formation of pressure gradients and associated wind patterns. Moreover, such heating drives evaporation and affects cloud development and precipitation.
Ocean currents also play a key role by redistributing heat from warmer to cooler areas due to the high heat capacity of water, moderating climates particularly near coastal regions. Additionally, the rotation of Earth and seasonal changes affect the sunlight distribution, further influencing weather patterns.
However, human activities, specifically the burning of fossil fuels, have an impact on the climate, intensifying the greenhouse effect and leading to climate change. These changes result in alterations to the Earth’s overall temperature, oceanic conditions, and the biogeochemical cycles, contributing to more extreme and unpredictable weather events. But for the daily weather changes, solar radiation and the redistribution of this energy by the atmosphere and oceans are the primary drivers.
When a bullet is fired from a gun, what is true about the momentum?
The gun has more momentum than the bullet, so the momentum is not conserved.
The bullet and gun have equal momenta in opposite directions, so the system's momentum is conserved.
The bullet has more momentum than the gun, so the momentum is not conserved.
The bullet and the gun have equal momenta in the same direction, so the system's momentum is conserved.
The bullet and gun have equal momenta in opposite directions, so the system's momentum is conserved.
According to the principle of conservation of linear momentum, the sum of the initial momenta must be equal to the sum of the final momenta.
The principle of conservation of momentum is written as;
[tex]m_1u_1 + m_2u_2 = m_1v_1 + m_2v_2[/tex]
where;
m₁ and m₂ are the masses of the bullet and gun respectivelyu₁ and u₂ are the initial velocity of bullet and gun respectivelyv₁ and v₂ are the final velocity of bullet and gun respectivelyThus, we can conclude that the bullet and gun have equal momenta in opposite directions, so the system's momentum is conserved.
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What does stressing an Equilibrium system mean? How is stress Applied?
Answer:
Explanation:
As per the law of Mass of Action, Rate of forward reaction is equal to the rate of reverse reaction.
In such condition,a system is stable and attains a phase known as dynamic equilibrium.
Consider an equation having some reactants and product to be on a balanced load or sea saw.
If stress is applied, the balance will be distributed and the sea-saw will bend towards the stress factor applied side.
The stress can be applied in different way :
By changing concentration
By changing temperature
By altering pressure or volume
Express 10^11 miners in examiners.
Answer in units of Emine ...?
A jug of water containing 5.00 kg of water is sitting on a table at sea level. The bottom of the jug has a radius of 10.0 cm. What is the pressure on the bottom of the jug?
49.0 N/cm2
6.41 N/cm2
0.156 N/cm2
15400 N/cm2
THE ANSWER IS C- 0.156 N/CM2
Final answer:
The correct answer is 0.156 N/cm², which is calculated by applying the pressure formula P = F/A, with the weight of the water serving as the force and the area being the circle's area at the jug's bottom.
Explanation:
The question asks us to compute the pressure on the bottom of a jug filled with water. To solve this, we can use the formula P = F/A, where P is the pressure, F is the force (which is the weight of the water in this case), and A is the area over which the force is distributed. The force can be calculated by multiplying the mass of water by the acceleration due to gravity, F = mg. The area is the area of the circle at the bottom of the jug, A = πr², where r is the radius of the jug bottom.
Let's calculate it step by step:
Calculate the force exerted by the water: F = m × g = 5.00 kg × 9.81 m/s² = 49.05 N.Calculate the area of the jug bottom: A = π × r² = 3.14159 × (10.0 cm)² = 314.159 cm².Compute the pressure: P = F/A = 49.05 N / 314.159 cm² = 0.156 N/cm².The correct answer is 0.156 N/cm².
A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the best demonstration that she could use?
A) bending a piece of aluminum
B)breaking a matchstick
C) dissolving sugar in water
D) burning a candle
Answer
D) burning a candle
Explanation
When burning a candle no new substance is form.
We have both physical and chemical change occuring.
Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.
Chemical part: burning of the wax vapour forms the chemical change.
How do bones and muscles work together to allow movement?
a. muscle pairs work together (contracting and relaxing). tendons attached to the muscles (and the bones) pull on the bones, which causes body movement.
b. bones and muscles do not work together. they are each part of their own seperate body system and do not interact.
c. ligaments pull on bones, causing them to move.
A rock is thrown straight upward off the edge of a balcony that is 5 m above the ground. The rock rises 10 m, then falls all the way down to the ground below the balcony. What is the rock's displacement?
The rock's displacement is 5 meters.
Explanation:The rock's displacement can be calculated by taking into account the initial height of the balcony and the maximum height reached by the rock. Since the rock was thrown straight upward, its initial velocity is positive and its final velocity is zero at the maximum height. The displacement is given by the difference between the final and initial positions, so it would be 10 m (the maximum height) minus 5 m (the height of the balcony), resulting in a displacement of 5 meters.
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A batter hits a baseball upward with an initial speed of 96 feet per second. After how many seconds does the ball hit the ground? Use the formula h = rt − 16t2 where h represents height in feet and r represents the initial speed. ...?
Answer:
6
Explanation:
The guy above is correct
The resultant force acting on an object of mass 5.0kg varies with time as shown. the object is initially at rest.
What are copper atoms held together by
The copper atoms are held together by a metallic bonding. The correct answer would be an option (A).
What is Metallic bonding?Among two or more metal atoms, metallic bonding is a form of chemical bonding that results from the attraction of the positively charged metal nuclei and their delocalized valence electrons. However, the contact involved has a distinct nature and is known as metallic bonding in compounds that exclusively include metal atoms.
Metallic bonding, as its name suggests, typically takes place in metals like copper. The copper atoms in a piece of copper metal are arranged in a certain way. These atoms are held together by their valence electrons, which are free to move throughout the metal and are drawn to the positive cores of copper.
Thus, the copper atoms are held together by a metallic bonding.
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The question seems incomplete, the missing options, as follows:
The copper atoms are held together by ____.
A. Metallic bonding
B. Ionic bonding
C. Covalent bonding
What is the Wind abrasion
We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)
Final answer:
The efficiency of the heat engine is calculated as the work output (40 J) divided by the heat input (150 J), resulting in an efficiency of 26.67%.
Explanation:
The efficiency of a heat engine is calculated using the ratio of the work output to the heat input. In this case, the engine does 40 J of work and the heat input is 150 J. The formula to find efficiency (η) is:
η = Work output / Heat input
η = 40 J / 150 J = 0.2667
So, the efficiency is 0.2667, or 26.67% when expressed as a percentage.
which of the following is not true about warming up a: warming up what's the heart rate increase gradually b: warming up increase blood flow to the muscles c warming up can help prevent energy to muscles, ligaments and joints d: warming up only needs to be done when performing cardiovascular exercses
Answer:
simple answer is D.
Explanation:
Which of the following best describes the relationship of solar UV radiation to the environment?
Mutagen
Germicide
Pollutant
Why will a set of stars appear at a different angle to us at different times of the year?
A. because we change location as Earth orbits the sun
B. because the stars move back and forth across the sky
C. because of distortions by gravity ...?
Answer:
A. because we change location as Earth orbits the sun
Explanation:
We have to remember that the universe is traveling and expanding and we are all traveling along with it, in this case the stars are expanding and traveling with the universe along with us, but the appearing on a different angle to us on different times of the year is because we orbit the sun, changing the angle at which we see the stars.
1. If a gallon of milk and a cup of milk are both at 8°C, the _____ of the gallon is higher.
potential energy
heat content
temperature
kinetic energy
2. As the vibration of molecules increases, the _____ of the substance increases.
temperature
internal energy
kinetic energy
all of the above
3. An indirect measurement of the speed of molecules is _____.
heat flow
temperature
friction
energy
4.How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C?
0.00027
3
90
13,000
5. 5.25 calories are absorbed by an iron nail. How many joules is this?
1.07
9.43
12.6
21.9
6. The specific heat capacity of aluminum is 0.22 cal/g°C. How much energy needs to flow into 20.0 grams of aluminum to change its temperature by 15°C?
0.017 cal
0.29 cal
66 cal
1363 cal
The heat content of the gallon is higher i just answered this on Odysseware and got it correct
What is Energy?
A.) The ability to do work.
B.) force*Distance
C.) Force
D.) Chemical Change
Calculate the quantity of work, in joules, associated with the compression of a gas from 5.64 L to 3.35 L by a constant pressure of 1.21 atm ...?
Final answer:
The work associated with compressing a gas from 5.64 L to 3.35 L at a constant pressure of 1.21 atm is 279.58 joules.
Explanation:
To calculate the quantity of work associated with the compression of a gas from 5.64 L to 3.35 L by a constant pressure of 1.21 atm, we use the formula for work done during a constant pressure process: W = -P ΔV, where W is the work, P is the pressure, and ΔV is the change in volume. First, we convert the pressure from atmospheres to pascals because the standard unit for work is joules, which requires pressure to be in pascals (1 atm = 101325 Pa).
Then we find the change in volume: ΔV = Vfinal - Vinitial = 3.35 L - 5.64 L = -2.29 L. We convert this volume from liters to cubic meters by using the conversion 1 L = 0.001 m3, so ΔV in cubic meters is -0.00229 m3. Finally, we calculate the work done: W = -(1.21 atm * 101325 Pa/atm) * (-0.00229 m3) = 279.58 J. Therefore, the work associated with the compression of the gas is 279.58 joules.
Which unit is used to measure resistance?
a. volts
b. charges
c. amperes
d. ohms
The unit used to measure resistance is ohms (Ω). (option d)
The relationship between voltage, current, and resistance is defined by Ohm's Law, which states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it and inversely proportional to the resistance (R) of the conductor. The formula for Ohm's Law is expressed as V = I × R.
Measuring resistance is crucial in various practical applications. For instance, when designing electronic circuits, engineers need to determine the resistance of different components to ensure proper functioning and avoid damage due to excessive current. To measure resistance, a device called a multimeter is commonly used. It can provide accurate readings of resistance in ohms and help diagnose issues in circuits or components.
It represents the degree to which a material or component hinders the flow of electric current and is vital for understanding and designing electrical circuits.
Main Answer: d. ohms
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