A car accelerates from 15 m/s to 25 m/s for 6 seconds. What is the car's displacement? (use: d=>(); + v) ) ​

Answer:

c. Synaptic transmission

Explanation:

To transmit impulses/electronic signals around the body, nerve cells transfer messages across the synapse and the movement of the chemicals from one cell to the other is known as either diffusion or synaptic transmission.

Considering the definition of speed, the speed of the shuttlecock is 250 \(\frac{cm}{s}\).

You have to know that speed ​​is a quantity that expresses the relationship between the space traveled by an object. That is, the speed is associated with the change of position of an object in space within a certain amount of time.

The speed can be calculated using the expression:

\(speed=\frac{displacement}{time}\)

In this case, you know that:

Replacing in the definition of speed:

\(speed=\frac{750 cm}{3 s}\)

Solving:

speed= 250 \(\frac{cm}{s}\)

In summary, the speed of the shuttlecock is 250 \(\frac{cm}{s}\).

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Answer:ur mom

Explanation:because

There is no work done by the normal force because all of the work is being done by gravity. 

W=0 J where J is Joules.

Normal force is always perpendicular to the motion of the body, hence work done by normal force is zero.

Work done = force×d = Fdcos(Θ)  { cos(90) = 0 }

Work done = 0 J

As the box moves down the incline, the only force doing work on the box is the force of gravity. The weight of the box is mg and the inclined plane makes an angle theta with respect to the horizontal, so the force of gravity is mg × sin(Θ)

So the work done by gravity is

W=mg×sin(Θ)×d

where d is the distance the box travels down the incline. The normal force is perpendicular to gravity, so the work done by the normal force is

W=F×d×cos(90)=0

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Answer:

860km

Explanation:

2× 430 = 860km

the rate is 430km per hr. 2 hours means you multiply by 2

Yes, there is an advantage to following through when hitting a baseball with a bat, thereby maintaining a longer contact between the bat and the ball.

The advantage of following through in a baseball game is that it increases the speed of the ball and also the energy associated with the ball's trajectory.

The longer the bat comes in contact with the ball, the greater the energy stored in the ball, and the farther the ball will go. Therefore, it is very important to follow through while hitting the ball with the bat in baseball games, which will result in the ball being propelled much farther than if it had been hit with a minimal follow-through.

Thus, it is beneficial to follow through when hitting a baseball with a bat, thereby maintaining a longer contact between the bat and the ball.

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The maximum efficiency of the steam engine can be calculated using the formula: Efficiency = (1 - Tc/Th) x 100%. Therefore, the maximum efficiency of this steam engine is 50%, which means that half of the thermal energy received by the engine is used for work, and the other half is exhausted to the condenser.

Where Tc is the temperature of the condenser (250 K) and Th is the temperature of the steam (500 K).
So, Efficiency = (1 - 250/500) x 100% = 50%
To calculate the maximum efficiency of a steam engine, we will use the Carnot efficiency formula, which considers the input and output temperatures.
Step 1: Convert the input and output temperatures to Kelvin, if not already provided.
In this case, the input temperature (hot reservoir) is already given as 500 K, and the output temperature (cold reservoir) is given as 250 K.
Step 2: Apply the Carnot efficiency formula:
Carnot efficiency = 1 - (Tc/Th)
where Tc is the temperature of the cold reservoir, and Th is the temperature of the hot reservoir.
Step 3: Substitute the given values into the formula:
Carnot efficiency = 1 - (250 K / 500 K)
Step 4: Calculate the efficiency:
Carnot efficiency = 1 - (0.5) = 0.5
Step 5: Convert the efficiency to a percentage:
Maximum efficiency = 0.5 * 100% = 50%
So, the maximum efficiency of this steam engine is 50%.

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Answer:

Time taken to travel remaining 228 miles = 2.4 hours.

Explanation:

So, distance traveled before = 876 - 228 =648 miles. Time taken for this = 6 hours. Speed before speed reduction = 648/6 = 108 mph.

When comparing the motions of a baseball thrown from a height of 10 ft and a ball that is simply dropped from the same height, there are distinct differences.

The thrown baseball exhibits a combination of vertical and horizontal motion. It follows a curved path due to the initial throwing velocity and the force of gravity, resulting in a parabolic trajectory. In contrast, the dropped ball experiences only vertical motion, falling straight down toward the ground in a vertical line. While both objects are affected by gravity, the thrown baseball's additional horizontal velocity allows it to cover a longer distance and follow a more complex path compared to the vertically descending dropped the ball.

Therefore, the thrown baseball exhibits both vertical and horizontal motion, following a curved trajectory due to the combination of the initial throwing velocity and the force of gravity. The dropped ball, on the other hand, experiences only vertical motion, falling straight down toward the ground along a vertical line.

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Answer:

(a) 11.3 T

(b) 6.09 T

Explanation:

Current, I = 14 kA = 14000 A

number of turns, N = 900

inner radius, r = 0.7 m

outer radius, R = 1.3 m

The magnetic field due to a circular coil is given by

\(B = \frac{\mu o}{4\pi}\times \frac{2 N\pi I}{R}\)

(a) The magnetic field due to the inner radius is

\(B = 10^{-7}\times \frac{2\times 900\times 3.14\times 14000}{0.7}\\\\B = 11.3 T\)

(b) The magnetic field due to the outer radius is

\(B = 10^{-7}\times \frac{2\times 900\times 3.14\times 14000}{1.3}\\\\B = 6.09 T\)

Answer:

cellular respiration.

explanation: cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.

The heat absorbed can be calculated using calorimetric equation. The heat absorbed by the copper block of mass 0.500 kg for the temperature difference of 290 to 400 degree Celsius is 2.13 E4 J.

Calorimetry is an analytical tool used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the mass m, temperature difference ΔT and specific heat capacity c is given by:

q = m c ΔT .

Given,

m = 0.500 kg

c = 387 J/(kg °C )

ΔT = 400 - 290 °C = 110°C.

Then, the heat energy absorbed by the copper block is ;

q = 0.50 kg × 387 J/(kg °C ) × 110°C

  =  2.13 E4 J

Therefore, option E is correct.

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Answer:

Explanation:

At t = 1 velocity = 0

At t = 3 velocity = 3

slope of the line = 3-0 / 3-1 = 3/2

At t = 2

velocity = 3/2 x ( 2 - 1 )

= 1.5 m /s

velocity at t = 2 is 1.5 m /s

Position at t = 2 :

displacement at t = 2

area of graph upto  t = 2

= 1 / 2 x 1 x 1.5 = .75

position at t = 2 :

= initial position + displacement

= 10 + .75 = 10.75 m

position at 6 s :

displacement at t = 6

area of curve upto  t = 6

= 1 / 2 x 2 x 3 +  3 x 3 + 1/2 x 3 x ( 4.5 - 3 )

= 3 + 9 + 2.25

= 14.25 m

position at t = 6

= initial position + displacement

= 10 + 14.25 = 24.25 m

position at 9 s :

displacement at t = 9

area of curve upto  t = 9

= 1 / 2 x 2 x 3 +  4 x 3 + 1/2 x 4 x ( 5 - 3 )- 1/2 x 2 x 1.5

= 3 + 12 + 4 - 1.5

= 17.5  m

position at t = 9

= initial position + displacement

= 10 + 17.5 = 27.5  m

Answer: >41.5N

Explanation:

Mass of bowling ball = 7.5kg

Breaking point of rope = T > 115N

Where T = Tension on the rope

Since the bowling ball is hung by a rope :

Tension (T) = mg = 7.5 kg × 9.8m/s^2 = 73.5kgm/s^2

T = mg + ma

F = ma

T = mg + F

>115 = 73.5 + F

F = 115 - 73.5

F = 41.5N

Force >41.5N

The minimum diameter for an objective lens that will just barely resolve Jupiter and the Sun is 5.3 mm.

Diameter is a term used to describe the width of an object, typically a circle. It is the length of a straight line passing through the center of a circle, and is the longest possible distance between two points on the circle. Diameter is also used to measure the size of many other shapes, such as ellipses, hexagons, and rectangles. Diameter can also refer to the size of a cylinder or a cone.

The minimum diameter for an objective lens that will just barely resolve Jupiter and the Sun is determined by the angular resolution of the lens. To calculate this, we can use the formula:
Angular Resolution = 1.22 * (wavelength/(diameter of the objective lens))
Assuming a wavelength of 550 nm (the average visible light wavelength), the diameter of the objective lens is calculated as follows:
Diameter of Objective Lens = 1.22 * (550 nm/Angular Resolution)
Since the radius of Jupiter's orbit is 780 million km, the angular resolution of the lens must be at least 780 million km/1.22, or 641 million km. Plugging this into the formula, we get:
Diameter of Objective Lens = 1.22 * (550 nm/641 million km)
Diameter of Objective Lens = 5.3 mm
Therefore, the minimum diameter for an objective lens that will just barely resolve Jupiter and the Sun is 5.3 mm.

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The jet stream is a narrow band of strong, high-altitude winds that flow in a westerly direction across the mid-latitudes of the Earth, generally between 30 and 60 degrees latitude in both hemispheres. The correct answer is d.

These winds can reach speeds of over 200 miles per hour and are caused by the differences in temperature and pressure between the polar and tropical regions. As the Earth rotates, the Coriolis effect causes the jet stream to follow a meandering. These waves can have a significant impact on weather patterns, as they can cause areas of high and low pressure to form, which can lead to storms, cold fronts, and other weather phenomena. Correct answer is option: d.

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Answer:

The answer is E

Explanation:

Wolves died off from the rona virus back in the 1930s so when they came back they brought C- 19 with them

The light from the pencil is being refracted as it travels from air to water.

option A.

An electromagnetic wave is a type of wave that do not require material medium for its propagation.

These waves are characterized by their frequency, wavelength, and amplitude.

Examples of electromagnetic waves include;

So light is an example of electromagnetic wave and it undergoes refraction, or bending when it hits an obstacle.

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The aforementioned circumstances can result in the production of 0.119 moles of ammonia (NH3).

We must utilize the ideal gas law and the stoichiometry of the balanced chemical equation for the reaction between hydrogen (H2) and nitrogen (N2) to make ammonia in order to determine how many moles of ammonia (NH3) were produced.

Let's begin by formulating the reaction's balanced equation:

3H₂ + N₂ → 2NH₃

We can see from the equation that we produce 2 moles of ammonia for every 3 moles of hydrogen. As a result, the molar ratio of ammonia to hydrogen is 2:3.

We must convert the supplied parameters of 4.0 liters of hydrogen at 50.0 °C and 1.2 atm of pressure into moles in order to use the ideal gas law. The ideal gas law and the molar volume of an ideal gas at standard temperature and pressure (STP) may be combined using the equation shown below:

PV = nRT

Where:

The temperature must first be converted from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 50.0°C + 273.15 = 323.15 K

To solve for the number of moles (n), we may now rearrange the ideal gas law equation as follows:

n = PV / RT

n = (1.2 atm) * (4.0 L) / (0.0821 L·atm/(mol·K) * 323.15 K) ≈ 0.179 mol

Since ammonia and hydrogen have a 2:3 molar ratio, we can calculate the amount of ammonia created by multiplying (2/3) * 0.179 mol by 0.119 mol.

As a result, the circumstances allow for the production of 0.119 moles of ammonia.

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Henry Mintzberg is credited with identifying the five elements of management.

Henry Mintzberg, a renowned Canadian management theorist and academic, is credited with identifying the five elements of management. In his book, "The Nature of Managerial Work," Mintzberg analyzed the work of managers and identified the five elements of management as: interpersonal, informational, decisional, and verbal and written communication.

The interpersonal element refers to the relationships between managers and other people, such as employees, customers, and suppliers. The informational element involves collecting, processing, and analyzing data to make informed decisions.

The decisional element refers to the role of managers in making decisions and solving problems. The verbal and written communication element includes the exchange of information and ideas through speaking, writing, and other forms of communication.

These five elements of management are considered key to understanding the work of managers and are widely used as a framework for analyzing and evaluating managerial work and activities.

However, it's important to note that the specific responsibilities and activities of managers can vary widely based on the size and type of organization, the industry, and the level of management.

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The steam heat-engine cycle operates between two pressures, 1 MPa during heat addition and 0.4 MPa during heat rejection.Therefore, the highest possible efficiency of this heat engine is 14.76%.

A heat engine is a device that converts thermal energy into mechanical work.

Efficiency is a measure of how effectively energy is converted into useful work output. It is the ratio of the output work to the input energy.

In this case, the steam heat-engine cycle operates between two pressures, 1 MPa during heat addition and 0.4 MPa during heat rejection. To determine the highest possible efficiency of this heat engine can be determined using the Carnot efficiency formula, which is given by:
Efficiency = (T1 - T2) / T1
Where T1 is the absolute temperature at which heat is added and T2 is the absolute temperature at which heat is rejected.
To find the temperatures, we can use the steam tables to look up the saturation temperatures corresponding to the given pressures of 1 MPa and 0.4 MPa. We find that:
- At 1 MPa, the saturation temperature is 274.15°C or 547.3 K
- At 0.4 MPa, the saturation temperature is 193.34°C or 466.5 K
Using these values in the efficiency formula, we get:
Efficiency = (547.3 - 466.5) / 547.3 = 14.76%
Therefore, the highest possible efficiency of this heat engine is 14.76%.
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Answer:

I'm not completely sure, but I believe the first and third of the three are mechanical.

Explanation:

Chemical potential isn't moving or about to go into motion. It can't be mechanical.

Answer:

C

Explanation:

When a solute is actively transported across epithelium, the usual follow-up is A) water movement in the opposite direction.

Active transport refers to the process in which substances, such as ions or molecules, are moved across a cell membrane against their concentration gradient, requiring the expenditure of energy. When solute is actively transported across an epithelium, it creates an osmotic gradient across the membrane.

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. In this case, since the solute is actively transported, it is being moved from an area of lower concentration to an area of higher concentration. As a result, water tends to move in the opposite direction, from an area of higher water concentration (lower solute concentration) to an area of lower water concentration (higher solute concentration).

Therefore, when a solute is actively transported across epithelium, the usual consequence is water movement in the opposite direction, as indicated by option A.

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Answer:

The world would be fine

Explanation:

Initial velocity of 2.4 m/s and an angle of 60°.

The x component is 2.4 m/s cos(60°) = 2.4 m/s (0.5) = 1.2 m/s

The y component is 2.4 m/s sin(60°) = 2.4 m/s (0.866) = 2.08 m/s

Initial velocity is the speed an object has when it starts moving in a certain direction. It is the speed that an object has before any external forces act upon it. Initial velocity is a vector quantity, meaning it has both a magnitude, or size, and a direction. Initial velocity is usually measured in meters per second (m/s). It is important to note that the initial velocity of an object can be different depending on the reference frame from which it is measured.

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The complete question is-

A paper airplane is thrown with an initial vclocity of 2,4 m and angle of 60" Find the Voz: 012m/s 0.62 mn/& 0 1.70 m/8 208 m/$

5. All the resistors in this circuit, the 18 Ω resistor included, are in parallel. The voltage drop across each resistor is the same, which is the equivalent to the potential difference of the battery. That is, 36 V [choice K].

6. The ammeter is in series with the branch containing a 12 Ω resistor. Since the voltage drop across this resistor is 36 V, the current in this branch will be I = V/R = (36 V)/(12 Ω) = 3.0 A [choice D].

7. The equivalent resistance of the circuit can be calculated as follows:

1/R = 1/12 + 1/9 + 1/18 = 1/4; thus, R = 4.0 Ω [choice G].

8. Electrical power can be defined as electrical work/time, and electrical work can be given by W = qV. If P = qV/t and q/t = I (charge flowing per unit time is equal to current), then P = VI. From Ohm's law, V = IR, and I = V/R. Substituting V/R for I in the power equation, P = V²/R.

For this circuit, the V = 36 V and R (the equivalent resistance) = 4.0 Ω. So, the power loss in the circuit is P = (36 V)²/(4.0 Ω) = 324 W [choice J].

Answer:

An isolated system is a single object that doesn't interact with any other objects. An isolated system has constantly changing energy. As a member, you'll also get unlimited access to over 79,000 lessons in math, English, science, history, and more.

Explanation:

An isolated system is a system in which the mass and energy are not allowed to escape.In open system, energy and mass can transfer and in closed system, only energy can transfer but the mass is conserved.

For an isolated system, the statement "total energy and mass are conserved" should be correct.

Therefore, for an isolated system, the statement "total energy and mass are conserved" should be correct.

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