Which of the following is an organic compound?

Answer:

Caffeine and stress can both elevate cortisol levels. High amounts of caffeine can lead to the negative health effects associated with prolonged elevated levels of cortisol. However, small to moderate amounts of caffeine can lift your mood and give you a boost. Caffeine can raise your heart rate and cause  extra heartbeats. And using large amounts of it for long periods can increase your risk of having a heart attack.

Explanation:

Hopefully this is right.

Answer:

Only at the precise moment when it has reached maximum height.

Explanation:

It's the precise moment when it accelerates downward.

Final answer:

To calculate the time for a car to accelerate from 60 km/h to 90 km/h with a constant acceleration of 2.0 m/s², velocities are converted to m/s and the formula v = u + at is used. The result is a time of 4.17 seconds.

Explanation:

The question pertains to a car initially traveling at 60 km/h that accelerates at a constant rate of 2.0 m/s² until it reaches a speed of 90 km/h. To calculate the time required for the car to reach this speed, we must first convert the initial and final velocities from km/h to m/s. Doing so, 60 km/h equals 16.67 m/s and 90 km/h equals 25.00 m/s. The formula that relates initial velocity (u), final velocity (v), acceleration (a), and time (t) is:

v = u + at

Substituting the known values results in:
25.00 m/s = 16.67 m/s + (2.0 m/s²)t

By rearranging the equation, we can solve for t:
t = (25.00 m/s - 16.67 m/s) / 2.0 m/s²

t = 4.17 s

Therefore, the car requires 4.17 seconds to accelerate from 60 km/h to 90 km/h given a constant acceleration of 2.0 m/s².

The basic unit of pressure mapped on weather maps is Millibar (mb). The correct option is A.

The standard unit for displaying atmospheric pressure on weather maps is the millibar, which is a frequently used unit of pressure in meteorology. It is equal to 100 pascals, or one thousandth of a bar.

Isobars, or lines bridging regions of equal atmospheric pressure, are shown on weather maps, and they are commonly labelled in millibars.

With the aid of this device, meteorologists can quickly analyse and evaluate pressure variations and patterns across various geographic locations, which aids in comprehending weather systems and the circumstances that go along with them.

Thus, the correct option is A.

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Your question seems incomplete, the probable complete question is:

The basic unit of pressure mapped on weather maps is

A) Millibar (mb)

B) Pascal (Pa)

C) Atmosphere (atm)

D) Pound per square inch (psi)

Answer:

45 degrees

Explanation:

The most likely final temperature of the mixture is 45 °C

The increment in temperature adds up the thermal energy into the object. This energy is Heat energy.

Given added 50mL of water at 10°C to 50 mL of water at 80°C.

Heat lost or gained is given by Q =m Cv ΔT

Heat lost = heat gain

50 x 4.18 x (T -10)= 50 x 4.18 x (80 - T)

T-10 = 80 - T

2T = 90

T = 45°C

Thus, final temperature of the mixture is 45 °C.

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Final answer:

Gravity is the force that pulls objects toward each other, always acting to bring masses together. It is determined by the mass of the objects, with larger objects exerting stronger gravitational pulls. This force is vital in everyday phenomena and in the broader understanding of the universe.

Explanation:

The force that pulls objects toward each other is known as gravity. This fundamental force is omnipresent in nature, always acting in an attractive manner between two objects. The strength of gravitational pull is directly related to an object's mass; therefore, the larger an object, the stronger its gravitational pull. Unlike other forces that can push objects apart, gravity uniquely pulls them together. It's important to note that every object with mass in the universe exerts a gravitational pull on every other mass, a principle crucial in understanding the cosmic ballet of celestial bodies, as well as the everyday phenomenon of objects falling towards the Earth.

Gravity's effect is evident in daily experiences, such as why we stay grounded on Earth and not drift off into space. The understanding of gravity also plays a crucial role in designing structures and in aerospace engineering, where gravitational forces must be accounted for. The gravitational force is consistent with Newton's third law, indicating that the force experienced between two objects due to gravity is equal in magnitude and opposite in direction, aligning along a line joining the centers of mass of the two bodies involved.

The atomic radius typically increases down a specific group and decreases throughout a period from left to right. Group I and the bottom of the groups are home to the isotopes with the biggest atomic radii.

The atom is the smallest piece of matter that may be divided without releasing electrically charged particles.

Additionally, it is the smallest piece of matter with the characteristics of a chemical substance. The atom is indeed the fundamental unit of chemistry as a result.

Look into the many-electron-electron configurations in the electron shells surrounding the atom's nucleus.

The majority of an atom is blank land. A cloud of electrons with negative charges surrounds a positive charge nucleus made up of neutrons and protons, which make up make the rest of the structure.

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We know that the density is defined as the ratio of mass to the volume.

Density = Mass/volume

We know that the unit of the mass is kg

Unit of the volume is liter (l)

Therefore the unit of the density will be kg/l .

Now the first expression is 5.2 Cm^3 which is a unit of volume. Therefore it will not be the expression for density.

Second expression is 0.71 mg which has unit of mass. Therefore it will also not be the expression for the density

Third expression is 20 g/cm^2 which also not have the unit of density.

Fourth expression is 5.13 kg/l which is having unit of density.

Therefore the expression of density will be 5.13 kg/l

D) What is the optimum amount of fertilizer for continued plant growth?

Wind and moving water both have kinetic energy, which is the energy an object has due to its motion. This energy can be harnessed to produce electricity, for example, in wind turbines and hydroelectric plants.

What wind and moving water have in common is that they both have kinetic energy. Kinetic energy is the energy an object possesses due to its motion. Wind, being moving air, possesses kinetic energy as it has mass and velocity. The same applies to moving water. Whether in the form of a running stream or waves in the ocean, the moving water particles possess kinetic energy due to their motion.

For instance, kinetic energy is the type of energy harnessed by wind turbines and hydroelectric plants. Wind turbines use the kinetic energy in wind to turn the blades of the turbine, which generates electricity. Similarly, hydroelectric plants use the kinetic energy of moving water to turn a turbine and generate electricity.

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If you push down on a piston in a fluid, then the pressure increases uniformly throughout the fluid. Hence, option D is correct.

A piston is a part of a variety of comparable mechanisms, including reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders, and pneumatic cylinders. It is the moving part, housed by a cylinder, and is sealed off from the atmosphere by piston rings.

The function of a piston rod and/or connecting rod in an engine is to transmit force from the expanding gas in the cylinder to the crankshaft. In a pump, the process is switched around so that force is transferred from the crankshaft to the piston in order to compress or eject the fluid in the cylinder. The piston can cover and reveal openings in the cylinder to function as a valve in some engines.

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The Gravitational force pulled together areas of matter in the early universe to begin the process of star formation.

The four fundamental forces that work in the universe are given below.

These fundamental forces have different strengths and they work over different ranges and directions.

The gravitational force operates on all objects of the universe in the infinite range. Gravitation is the most important of the four fundamental forces for astronomical objects over astronomical distances for two reasons.

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A correct example of the principle of conservation of momentum is the bouncing of a basketball off the board. Therefore, option D is correct.

As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum.

"The motion of an item equal to the product of its mass and its velocity" is referred to as momentum. When something is said to have momentum, it refers to its unique mass and direction of motion.

Here, we offer a few more ideas that will help us describe motion in the future. Before Newton, the French scientist and philosopher Descartes introduced the first of them, called momentum.

Thus, option D is correct.

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In the design of a thermos lab, the container that is used for comparison purposes with the thermos is typically an uninsulated container or a regular open container. This is done to demonstrate the effectiveness of the insulation in the thermos and highlight its ability to retain heat or cold compared to a container without insulation.

Purpose of uninsulated container

By checking the temperature of the thermos and the uninsulated container, you can see how heat moves differently between them. The thermos keeps drinks hot or cold for a long time because it doesn't let heat get in or out easily. But a regular container lets heat in and out more easily.

This comparison shows how well the thermos can keep drinks hot or cold for a long time. It says it's important to use insulation to stop heat from escaping, and it shows how using a thermos can keep things at the right temperature for longer.

Final answer:

During upward acceleration in an elevator, your perceived weight increases due to the increased normal force required for acceleration, although your mass remains unchanged. Once the elevator moves at a constant speed, the normal force equals your actual weight, and the scale reads your true weight.

Explanation:

When you are in an elevator that starts from rest and accelerates upward, your weight, mass, and the normal force exerted by the floor experience noticeable changes. Firstly, your mass remains constant regardless of the elevator’s movement because mass is a measure of the amount of matter in your body and does not depend on gravity or acceleration. However, your weight and the normal force exerted by the floor change as the elevator moves.

When the elevator accelerates upward, the normal force exerted by the scale (or floor) must not only support your weight but also provide the force necessary to accelerate you along with the elevator. This means the normal force, which you perceive as your weight, increases. Thus, if you were standing on a bathroom scale during this acceleration, the scale would display a value greater than your actual weight at rest, reflecting the increased normal force required to accelerate you upward.

Once the elevator reaches a constant speed, you would no longer be accelerating, and the normal force would again match your actual weight, assuming the elevator is moving at a constant velocity upward or remains stationary. In this scenario, the scale would then read your true weight, similar to when you are at rest. This illustrates how acceleration affects the normal force and perceived weight, differing from the constant mass.

The Answer in significant figures is 3.20 meters. The full Answer is 3.201707577*10^0 meters

Explanation:

You must first convert 93.7Mhz to hz: 93.7mhz * 10^6hz/1Mhz = 9.37*10^7.

Next, since all EM waves' frequency and wavelength = the speed of light(c)(3.00*10^8m/s), insert the new frequency (hertz) into the formula below and solve for Wavelength (lambda)

c=(lambda)(hertz), manipulate the equation to solve for wavelength (lambda)

(lambda)=(C) / (hertz) ; Hertz = hz = s^-1 or 1/s

lambda = 3.00*10^8m/s / 9.37*10^7hz (^^remember hz = 1/s)

Since hz = 1/s, both of the factors have 1/s in the variables' place, so the 1/s cancels and your left with m (meters)

= 3.201707577 meters

Answer:

What wave is a sound wave?

For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.

Explanation:

a) At a position of 2.0m, the Initial energy is all made up of the potential energy=m*g*hi
and meanwhile at 1.5 all its energy is also potential energy=m*g*hf 

The percentage of energy remaining is E=m*g*hi/m*g*hf x 100 

and since mass and gravity are constant so it leaves us with just E=hi/hf 
which 1.5/2.0 x100= 75% so we see that we lost 25% of the energy or 0.25 in fraction 

b) Here use the equation vf^2=vi^2+2gd 

where g is gravity, vf is the final velocity and vi is the initial velocity while d is the distance travelled

so in here we are looking for the vi so let us isolate that variable 
we know that at maximum height or peak, the velocity is 0 so vf is 0 

therefore,

vi =sqrt(-2gd) 
vi =sqrt(-2x-9.81x1.5) 
vi =5.4 m/s

c) The energy was converted to heat due to friction with the air and the ground.

Answer:

Being nice and being their for them and making sure that they are never alone. Talk to them and make them feel safe.

Explanation:

Circular motion is the type of motion which is responsible for the motion in a convection current. Thus, the correct option is D.

The heat energy can be transferred through the process of convection by the difference which is occurring in the temperature between two parts of the fluid. Due to this difference in temperature, the hot fluids tend to rise, whereas the cold fluids tend to sink deeper. This creates a current within the fluid which is called as the convection current.

Convection currents are the heat-driven cycles which occur in the air, ocean, and mantle due to the circular motion. They are caused by a difference in temperature, often due to a differing proximity to a heat or energy source. The difference in the temperature relates directly to the density of the material, which is causing this effect.

Therefore, the correct option is D.

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