An object is thrown upward from a height of 7ft. The height h of the object (in feet) t sec after the object is released is given by h = -16t2 + 48t + 7. Round your answers to two decimal places, if necessary.

Scientists use Atomic clock to measure time

When substances combine chemically,

C) the total mass of both substances will be equal to the mass of each of the mass added together.

State the Law of Conservation of Mass?

"The mass cannot be created through a chemical reaction, neither can it be destroyed."

following this law the mass of the products and the mass of the reactants are always equal in a physical or chemical transition.

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C.

Explanation: Because mirrors are lighter, and they are easier than lenses to make perfectly smooth.

(a) The moment of inertia of the combination about an axis perpendicular to the bar through its center is 0.054 kg·m².

(b) The moment of inertia of the combination about an axis perpendicular to the bar through one of the balls is 0.024 kg·m².

(c) The moment of inertia of the combination about an axis parallel to the bar through both balls is 0.348 kg·m².

(d) The moment of inertia of the combination about an axis parallel to the bar and 0.500 m from it is 0.087 kg·m².

The moment of inertia measures the resistance of an object to changes in its rotational motion. For the given combination of a uniform bar with two small balls, the moment of inertia is calculated differently depending on the axis of rotation.

(a) When the axis of rotation is perpendicular to the bar and passes through its center, the moment of inertia is 0.054 kg·m². This can be determined by considering the bar as a continuous object and applying the formula for the moment of inertia of a slender rod.

(b) If the axis of rotation is perpendicular to the bar but passes through one of the balls, the moment of inertia is 0.024 kg·m². In this case, the moment of inertia of the bar is considered along with the additional moment of inertia contributed by the two balls, which can be treated as point masses.

(c) When the axis of rotation is parallel to the bar and passes through both balls, the moment of inertia is 0.348 kg·m². This can be obtained by considering the individual moments of inertia of the bar and the two balls and summing them up according to the parallel axis theorem.

(d) If the axis of rotation is parallel to the bar and positioned at a distance of 0.500 m from it, the moment of inertia is 0.087 kg·m². This calculation incorporates the parallel axis theorem again, taking into account the increased distance from the axis of rotation.

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Answer:

20 kg

More force required after placing weight in trunk to accelerate the trunk than before when the trunk is empty.

Explanation:

We are given that

Mass of empty trunk, m=10 kg

Mass of a weight, m'=10 kg

We have to find the total mass after placing weight in trunk and how will this affect the force needed to accelerate the trunk.

Total mass =m+m'

Total mass=10+10=20 kg

We know that

Force, F=ma

Force is directly proportional to mass.

When we placed weight in trunk then the mass of trunk increases .Therefore, now more force required to accelerate the trunk than before when the trunk is empty.

Answer:

Newton's Third Law states that "For every action, there is an equal and opposite reaction." An example of this law is the following scenario:

Imagine you are pushing a heavy box across the floor. According to Newton's Third Law, the box will exert an equal and opposite force back on you, making it harder to push. The more force you apply to the box, the greater the force it will exert back on you. This reaction force is what makes it difficult to push the box. The same idea applies when jumping off a diving board or jumping on a trampoline - the force you apply to the board or trampoline is equal and opposite to the force it applies back on you.

Answer:

Time = 1.44 minutes

Explanation:

Given that the circumference of the wheel is 1250 m, which is the distance to be covered.

Thus,

speed =

distance = 1250 m, speed = 12 m/s.

So that;

12 =

time =

       = 104.16667

time = 104.17 s

But, 60 seconds = 1 minute

time = 1.4417

       = 1.44 minutes

The time required for one trip around the wheel is 1.44 minutes.

Maximum theoretical efficiency is 67.2%.

What is Maximum theoretical efficiency?
The utmost efficiency that a heat engine may achieve when working

between two temperatures is known as the Carnot Efficiency.
The degree of heat that the high temperature reservoir runs at ( T Hot ).
The degree of heat in the low temperature reservoir ( T Cold ).
The two temperatures in the case of a car are:

the temperature of the engine's combustion gases ( T Hot ).

The temperature at which the engine's gases are released ( T Cold ).

The maximum theoretical efficiency of this engine is the efficiency of a Carnot engine connected between the same two reservoirs, found from Equation
e C=1− T h

Substitute numerical values:
e C​ =1− 2143.15
703.15
=0.672
=67.2%
Maximum theoretical efficiency is 67.2%.

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Answer:

The water filled balloon does not burst because the rubber obviously does not reach a temperature sufficient for it to melt or burn. The rubber is stretched thin so that heat is quickly transferred into the balloon. With air inside the balloon, this heat is not readily dissipated away from the spot touching the flame.

Answer:

Alloys are just mixtures of metal and metalloids are metallic substances with properties of metal.

Answer:

metalloids are chemical elements that form substances that have properties of metals and non metals while alloys is a mixture of metals

The terrain and topography of Washington state may also influence the likelihood of a crater forming.

A crater is a bowl-shaped depression or cavity that is typically formed on the surface of a planet, moon, or other celestial body by the impact of a meteoroid, asteroid, or comet. Craters can also be created by volcanic activity, explosion, or other geological processes.

The absence of 10 km impact craters in Washington state may be due to various factors such as the geological composition of the area, the frequency of meteorite impacts, and the probability of a meteorite of that size and velocity hitting the state.

It is important to note that the formation of a 10 km impact crater requires an impactor of significant size and velocity, which may not be common or likely to hit a specific region. Certain areas may be more prone to erosion or have a higher likelihood of volcanic activity that could conceal or alter the appearance of a crater.

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Answer: green car and red car

Explanation:

Answer:

it is white car for the first question and for the second it goes green slowest and white fastest red is in the middle

The x-component of the velocity of the camera is approximately -2.333 m/s, and the y-component of the velocity of the camera is approximately 2.768 m/s applying the law of conservation of momentum..

To solve this problem, we can apply the law of conservation of momentum. Since there are no external forces acting on the system, the total momentum before and after the toss must be equal.

Mass of the astronaut (mA) = 63 kg

Mass of the oxygen tank (mT) = 11 kg

Mass of the camera (mC) = 6.0 kg

Velocity of the tank (vT) = 1.2 m/s

Velocity of the astronaut (vA) = 0.66 m/s (magnitude)

Direction of astronaut's velocity (θA) = 200° counterclockwise from the x-axis

To find the x-component of the velocity of the camera (vCx):

Using the law of conservation of momentum in the x-direction:

(mA * vA)x + (mT * vT)x = (mC * vCx)

(63 kg * 0.66 m/s * cos(200°)) + (11 kg * 1.2 m/s) = (6.0 kg * vCx)

Solving the equation:

vCx ≈ -2.333 m/s (rounded to three decimal places)

To find the y-component of the velocity of the camera (vCy):

Using the law of conservation of momentum in the y-direction:

(mA * vA)y + (mT * vT)y = (mC * vCy)

(63 kg * 0.66 m/s * sin(200°)) + (11 kg * 1.2 m/s * 0) = (6.0 kg * vCy)

Solving the equation:

vCy ≈ 2.768 m/s (rounded to three decimal places)

Therefore, the x-component of the velocity of the camera is approximately -2.333 m/s, and the y-component of the velocity of the camera is approximately 2.768 m/s.

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The ADA's (American Dental Association) standard for viewing and interpreting intraoral radiographic images is (C) patient orientation.

This refers to the proper positioning of the radiographic film or sensor in relation to the patient's mouth during image acquisition. Patient orientation ensures consistent and accurate interpretation of the radiographic findings.

When viewing intraoral radiographic images, the standard practice is to orient the images as if the viewer is looking at the patient from their perspective. This means that the viewer sees the patient's right side on the left side of the image and the patient's left side on the right side of the image. This patient-oriented view helps in accurately identifying specific teeth and structures within the oral cavity.

Labial mounting and lingual mounting refer to specific techniques used for mounting the radiographic film or sensor, and external orientation is not a term commonly associated with the ADA's standard for viewing and interpreting intraoral radiographic images.

Therefore, (C) Patient orientation is the correct answer.

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The position where the oscillating object experiences no force is the equilibrium position. This means that the object is not experiencing any force that would cause it to change its position or motion.

The equilibrium position is the position at which the oscillating object experiences no net force. This means that the forces acting on the object are balanced, resulting in no acceleration or change in motion. The object will continue to oscillate around this position, as it moves away from equilibrium due to an applied force and then returns to it as the force is removed.

In an oscillating system, such as a pendulum or a spring, the object moves back and forth around the equilibrium position. When it is at this position, the forces acting on it are balanced, resulting in no net force and no acceleration.

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Answer:

8173.8 km

Explanation:

Fg=G(M*m/r^2)

r=sqrt(G*M*m/Fg)

G=6.6743*10^-11

M(earth)=5.972*10^24kg

M(object)=352kg

Fg=-2100N

r=sqrt((6.6743*10^-11)*(5.972*10^24kg)*(352)/-2100)

r=8173808m

r=8173.8km

According to Newton's calculations, gravity reduces to a fourth of what it was at the surface of the Earth if the distance from the planet's centre is doubled. At the Earth's surface, a satellite with a mass of 1,000 kg exerts a weight force of 9,800 N.

Satellites are pulled toward Earth by its gravity, even when they are hundreds of kilometres distant. The satellite doesn't fall back to Earth; instead, it travels into orbit above it due to gravity and the velocity it acquired during launch into space.

A satellite that is in a steady circular orbit around the Earth is always falling. It encounters a gravitational pull toward the centre of Earth as it orbits, which forces it to shift course and “fall” towards Earth.

Therefore, Since gravity is the only force acting on a satellite in circular orbit, the centripetal force and gravity must be equal: Fc = Fg.

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Answer it will move slower:

Explanation: cause the force that’s opposite of it

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.

Answer:

Given:

Three types of materials A, B, and C are there.

The coefficient of absorption of A is 30 %, B is 47 %, and C is 62 %.

To find:

Which material would you recommend and why?

Explanation:

Soundproofing is usually achieved by using materials that absorbed or reduce sounds. The coefficient of absorption of a material refers to that material's ability to absorb sound. The higher the percentage of a material absorption coefficient, the better the material's ability to absorb sound.

Hence, the material with a 62 % absorption coefficient that is Sample C has the greatest ability of the three materials to absorb sound effectively.

B) Sample C, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the small

Answer:

Explanation:

.

Answer:

Apply the following formulae horizontally And get A value for time

Remember horizontal acceleration is zero

\(s = ut + \frac{1}{2}a {t}^{2} \\ 0.8 = 1.7 \times t \\ \frac{0.8}{1.7} = t \\ t = 0.47s\)

and then to find the height apply the same above equation vertically...remember vertical initial velocity is zero

\(s = ut + \frac{1}{2} a {t}^{2} \\ s = \frac{1}{2} \times 10 \times (0.47) ^{2} \\ s = 1.1045m\)

If a coin rolls off the edge of a table. The coin was traveling at a speed of 1.7 m/s. If it lands 0.8 m away from the table leg, then the height of the table would have been 1.0835 meters.

There are three equations of motion given by  Newton

v = u + at

S = ut + 1/2×a×t²

v² - u² = 2×a×s

As given in the problem If a coin rolls off the edge of a table. The coin was traveling at a speed of 1.7 m/s. If it lands 0.8 m away from the table leg, then we have to find the height of the table,

By using the second equation of motion given by newton

S = ut + 1/2at²

0.8 = 1.7×t

t = 0.8 / 1.7

t = 0.47 seconds

Now applying the second equation of motion for the vertical motion,

S = ut + 1/2gt²

  = 0 + 0.5×9.81×0.47²

  = 1.0835 meters

Thus, the height of the table would have been 1.0835 meters.

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(5 L/m)x(1,440 m/da)x(365 da/yr)x(20yr)

That's 52,560,000 Liters, or 52,560 m^3.

Answer: Density=0.8

Explanation: It's 0.8 because you are supposed to do m/v=d and that would be 40/50=0.8

Answer:

The density is 0.8 g/cc.

Explanation:

40g/50mL=0.8 g/cc.

0.8 g/cc is equal to 0.8 g/mL.

The mass m of the block on the left is 16 Kg , correct answer.

What is friction?

Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

Think about how a 100 kilogramme block would move.

beginning speed (Vi) = 0 m/s

a stands for speed.

d=displacement=1 m

Time taken is t = 0.53 seconds.

Using the formula:

d=Vi t+(0.5)a t2

1 = (0) (0.53) + (0.5) a (0.53) (0.53)

2

a = 7.12 m/s2

Acceleration for an at wood machine is expressed as

7.12 = (100 - m) (9.8)/ (100 + m)

m = 15.84 kg

m = 16 kg

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Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. This is:

ρ = m/V

ρ = 4.05 g  / 12 mL

ρ = 0.3375 g/mL

OPTION A

In the peak of summer, it hasn't rained in a week, and the plants are looking rough, so watering the plants for an hour is a good idea.

However, the next day, you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. Plants absorb water through their roots. The root system of a plant is responsible for drawing water and nutrients from the soil. A plant's root system must be able to absorb water quickly in order for the plant to grow and thrive. When the soil around the root system is dry, the roots will stop growing and will not be able to absorb water.

It may even start to die. Watering plants during the peak of summer is important because it will help keep the soil moist and prevent the roots from drying out. However, watering a plant too much can be harmful. If a plant is overwatered, the water may not be able to penetrate the soil and reach the roots. Instead, it may just sit on top of the soil, causing the roots to rot and die. This can cause the plant to wilt and die.To summarize, if the soil around the plant is too dry, the roots may not be able to absorb the water you gave them, causing the plant to look worse than before. Conversely, overwatering can also be harmful because the water may not be able to penetrate the soil and reach the roots, causing the roots to rot and die.

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All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy

Answer:

Explanation: Roller coasters are an excellent example of how science and energy transformation can be used to create an exciting and thrilling experience for riders. The design of roller coasters utilizes the principles of physics to create the twists, turns, and drops that riders experience.

One of the key scientific concepts used in roller coaster design is energy transformation. Roller coasters start with potential energy, which is the energy stored in an object due to its position or state. The potential energy in a roller coaster comes from the height it is lifted to at the start of the ride. As the roller coaster begins its descent, the potential energy is transformed into kinetic energy, which is the energy of motion.

During the ride, the roller coaster's energy is constantly being transformed from potential energy to kinetic energy and back again. As the roller coaster climbs a hill, it gains potential energy, which is then transformed into kinetic energy as it speeds down the hill. When the coaster reaches the bottom of a hill or a loop, it has the maximum kinetic energy, which is then transformed back into potential energy as the coaster climbs the next hill.

In addition to energy transformation, roller coasters also rely on other scientific principles, such as friction, gravity, and centripetal force, to create a thrilling ride. For example, the coaster's wheels and track are designed to minimize friction, which allows the coaster to travel faster and more smoothly. The coaster's drops and turns use gravity and centripetal force to create the feeling of weightlessness and acceleration.

Overall, roller coasters are an excellent example of how science and engineering can be used to create thrilling experiences that rely on principles of energy transformation and other scientific concepts.

I hope this helped

The source of protons that are pumped out of the mitochondrial matrix in Stage 1 of oxidative phosphorylation is NADH (A).

During Stage 1, electrons from NADH are passed through the electron transport chain (ETC) and this process results in the pumping of protons across the inner mitochondrial membrane from the matrix to the intermembrane space. This proton gradient is then used by ATP synthase to generate ATP during Stage 2 of oxidative phosphorylation.

FADH can also donate electrons to the ETC, but it does not contribute as many protons to the gradient as NADH. H₂O and H₂S are not involved in the electron transport chain or the proton pumping process during oxidative phosphorylation. Understanding the role of NADH and FADH in the electron transport chain is crucial to understanding how cells generate ATP, the primary energy currency of the cell. Hence, the correct answer is Option A.

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