PSYCHOLOGY

The most widely used psychoactive drug is
ОА.
heroin.
B.
caffeine.
O C.
PCP.
O D.
LSD.
the answer is B.caffeine. Just didn’t see anyone have this question on Brainly yet.

ANSWER:

0.732 m^3/s

STEP-BY-STEP EXPLANATION:

We must convert from ft^3/min to m^3/s.

To do this, we must take into account the following conversion factors:

1 meter is equal to 3.28 feet

1 minute is equal to 60 seconds

Knowing this, we do the conversion just like this:

The fans airflow in m^3/s is 0.732

The statement "topping off when filling up your gasoline tank helps lower emissions" is FALSE.

When we fill our gasoline tanks, there is often a natural tendency to squeeze the handle for just a little bit longer to make sure that the tank is completely full, or to round up to the nearest dollar amount. This is referred to as "topping off," and it is not a good practice because it is unnecessary and can cause more harm than good.

Firstly, topping off isn't necessary because modern gas pumps are equipped with automatic shut-off valves that prevent gasoline from being dispensed once the tank is full. Topping off your tank also means you're running the risk of overfilling the gas tank, which can cause fuel spills to occur. When fuel spills occur, they can evaporate into the air and contribute to ground-level ozone formation and smog.

Furthermore, when gasoline spills onto the ground, it can also contaminate nearby water sources and harm wildlife. Finally, excess fuel can build up in the engine's evaporative emissions control system when a tank is overfilled. This can result in a malfunctioning emission control system, which can ultimately lead to increased air pollution and smog formation.

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When a brass rod is encased in aluminum  its  speed of a sound wave increases when it passes though the rod and moves from the brass into the aluminum.

speed of sound in solids > speed of sound in liquids > speed of sound in gases.

So, sound travel faster in solids because the molecules are more closer in the solid state.

solid and liquid are less compressible than gas so liquids and solids have much greater bulk modulus than that of gases.

Thus the speed of sound increases when it travel from gases to solids state.

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Answer:

I HAD THE SAME QUESTION AND SEARCHED IT UP AND GOT THE ANSWERS.

Explanation:

The merry-go-round is accelerating since it is moving in a circle despite the fact that it is moving at a constant speed. The fact that an object moves in a circle does not always imply that it is moving at a constant speed. When an object moves in a circle, it changes direction, and this alteration of direction implies that the object is accelerating.

Even if the speed remains constant, it is still accelerating because the velocity is changing. This is referred to as centripetal acceleration. Centripetal acceleration is the acceleration caused by a force that pulls an object towards the center of the circle. Centripetal force is required for a body to move in a circle. A merry-go-round moves in a circle at a constant speed. This implies that the speed of the merry-go-round does not vary. However, the direction of motion changes continuously, indicating that the merry-go-round is constantly accelerating. Therefore, the merry-go-round is accelerating despite the fact that it is moving at a constant speed.

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Let r be the distance between the man and point Q. He applies a torque of

(r i ) × ((-800 N) j ) = ((-800 N) r ) k

pointing "into the page" with magnitude (800 N) r.

Meanwhile, the rope applies a torque of

((3.0 m) i ) × ((500 N) j ) = (1500 N•m) k

pointing out of the "page" with mag. 1500 N•m

The beam is held in place in a horizontal position, so the torques cancel and

(800 N) r = 1500 N•m

r = (1500 N•m)/(800 N) = 1.875 m ≈ 1.9 m

Answer:

1 Watt

Explanation:

P=W/t

P=10/10

P=1 Watt

A change in the axon membrane potential from -70 mv to -90 mv would be termed as hyperpolarization.

Hyperpolarization occurs when the membrane potential becomes more negative than the resting potential. In this case, the membrane potential has decreased from -70 mv to -90 mv, indicating that the neuron has become more polarized or inhibited. The change in the membrane potential is caused by an increase in the permeability of the axon membrane to ions, which results in an efflux of positively charged ions, such as potassium, from the cell. This efflux of ions makes it more difficult for the neuron to reach its threshold potential and generate an action potential. Overall, hyperpolarization is an important physiological mechanism that allows neurons to maintain their resting potential and regulate their excitability.

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Answer:

the direction of motion of the pulse

Answer:

A spinning space station will have centrifugal force acting on the inhabitants which if adjusted right can simulate the force of gravity on Earth

Explanation:

Answer:

Option (b).

Explanation:

Mass of an object is defined as the amount of matter contained in it. In this case, the mass of helium gas in a balloon is the amount of matter inside the balloon. It is independent of the outside condition.

Hence, out of 4 options, the correct option is (b).

Answer:

b

Explanation:

Radio telescopes cannot simply scan the skies looking for signals, because they receive radio waves of low intensity from outer space, and these waves are mixed up with terrestrial interference such as radio or television signals. These radio waves, mostly of frequencies ranging between 10 MHz and 100 GHz, are extremely weak by the time they reach Earth because they have been traveling for millions of years through space.

Radio telescopes must be highly sensitive in order to detect these low-intensity radio waves. Radio telescopes are designed to minimize terrestrial interference by being placed in isolated areas far from civilization. To capture faint signals, radio telescopes must be very large in size. Many radio telescopes are composed of several large antennae connected together to form an interferometer. This type of design offers a much larger detection area compared to a single large antenna.Astronomers use computer algorithms and powerful computer processors to analyze radio signals. The signals received by radio telescopes can be processed to produce an image of the source of the signal, such as a star or galaxy. These radio images can provide valuable information about the properties of the celestial bodies they detect.

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Answer:

D. It decreases

Explanation:

Force = mass × acceleration

80 = M × 195

M = 80/195

M ≈ 0,4 kilograms

Answer:

F=ma

a=F/m

so kickball having less mass will result to more acceleration

Explanation: i said so andddd when i put this it said it was right hehe

In a homogeneous magnetic field, a positively charged particle moves in a circular route with a radius of r that is perpendicular to the field. For a half-revolution, there is no magnetic force F exerted on the charge.

A area of space where magnetic forces are present is called a magnetic field. It is produced by moving electric charges or by the intrinsic magnetic moments of elementary particles, such as electrons or protons. Magnetic field lines always form closed loops, indicating that magnetic fields have no beginning or end.

Magnetic fields play an important role in many areas of science and technology, from the behavior of compasses and the Earth's magnetic field to the operation of motors and generators. They also have a wide range of practical applications, such as in medical imaging, particle accelerators, and magnetic storage devices. Understanding the properties and behavior of magnetic fields is essential for many fields of science and engineering.

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Complete Question:-

A positively charged particle in a uniform magnetic field is moving in a circular path of radius r perpendicular to the field. How much work does the magnetic force F do on the charge for half a revolution?

Answer:

6.76875 • 10 ^-10 F

Explanation:

You just follow the formula:

C = εA/d

ε = 8.85 • 10^-12

A = 3.61 • 10^-4

D = 4.72 • 10 ^-6

So:

C = (8.85 • 10^-12)(3.61 • 10^-4)/4.72 • 10 ^-6 = 6.76875 • 10 ^-10 F

Good Luck!  :)

Answer:

answer is 66 kilograms-force = 647.2389 newtons

Explanation:

Answer:

\(\boxed {\boxed {\sf 646.8 \ Newtons }}\)

Explanation:

Weight in Newtons can be found by multiplying the mass times the acceleration of gravity.

\(W=m*g\)

The mass of the man is 66 kilograms on Earth.

Earth has an acceleration of gravity that is 9.8 meters per square second.

\(m= 66 \ kg \\g=9.8 \ m/s^2\)

Substitute the values into the formula.

\(W=66 \ kg *9.8 \ m/s^2\)

Multiply.  

\(W=646.8 \ kg*m/s^2\)

1 kg * m/s² is equal to 1 Newton, therefore our answer of 646.8 kg *m/s² is also equal to 646.8 Newtons, or N.

\(W=646.8 \ N\)

The man's weight in Newtons in 646.8 Newtons.

Hi there!

(A) The force that the ball exerts on Earth is equal in magnitude to the force that Earth exerts on the ball.

Gravitational force is an example of an action-reaction pair:

\(F_{1,2} = -F_{2,1}\)

Gravitational force is given by the equation:

\(F_g = \frac{Gm_1m_2}{r^2}\)

Plugging in the masses of the Earth and ball, gravitational constant, and radius will result in the SAME GRAVITATIONAL FORCE exerted by both objects on each other.

Answer:

Explanation: as,

v=f∧

v=200×10³×1.5×10³

v=2.7×10^7ms⁻¹

The velocity of the radio waves is 3 × 10⁸ ms⁻¹.

A radio station frequency = 200 KH

wavelength = 1.5 km

         Radio waves in the electromagnetic spectrum has the longest wavelength and it will always be below 300GHz. The radio waves can be generated with acceleration through some charged particles. Only through the transmitter via antenna the radio waves can gets transmitted. Radio waves can be used in all the electronic devices as mobile phones, radio communication, radars and navigations.

                               V = f λ

            Velocity,  v = ( 200 × 10³ ) × ( 1.5 × 10³ )

                               = ( 300 × 10⁶ )

                             v = 3 × 10⁸ ms⁻¹.

Hence, the velocity of the radio waves is 3 × 10⁸ ms⁻¹.

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Reference points change based on who is observing because they are subjective and depend on the frame of reference of the observer. A frame of reference is the set of coordinates and axes used to describe the position and motion of objects.

Different observers may have different perspectives, locations, or velocities relative to the observed object, leading to different reference points.

For example, consider two people observing a moving car. If one person is standing still on the sidewalk, their reference point would be the stationary position relative to the car. However, if another person is in a moving car alongside the observed car, their reference point would be the moving car itself.

Therefore, each observer's unique frame of reference affects their perception and measurement of position, velocity, and other physical quantities. Recognizing the relativity of reference points is crucial in understanding how different observers may have different interpretations of the same event or object's motion.

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A solid disk of mass 2.5 kg and radius 0.82 m that rotates in the z-y plane is an example of rotational motion. The disk is spinning around its central axis, which is perpendicular to the plane of the disk. The motion of the disk can be described in terms of its angular velocity and angular acceleration.

The angular velocity of the disk is the rate at which the disk is rotating. It is measured in radians per second and is given by the formula ω = v/r, where v is the linear velocity of a point on the edge of the disk and r is the radius of the disk. The angular velocity of the disk remains constant as long as there is no external torque acting on it.The angular acceleration of the disk is the rate at which its angular velocity is changing. It is given by the formula α = τ/I, where τ is the torque acting on the disk and I is the moment of inertia of the disk. The moment of inertia is a measure of the disk's resistance to rotational motion and depends on the mass distribution of the disk.

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The rubber ball has both the greatest kinetic energy and the least potential energy at position 3.

According to the conservation of energy, the total mechanical energy of a system remains constant. There are two forms of energy - potential energy and kinetic energy.Potential energy (PE) is the energy that an object possesses due to its position or shape. It has the potential to do work when it moves.Kinetic energy (KE) is the energy an object possesses when it moves. It's given by the equation KE = 1/2mv².In the image shown, when the ball is at Position 1, it has potential energy and no kinetic energy. The ball has zero speed at this position.

As the ball falls to the ground, its potential energy is converted to kinetic energy. At position 3, the ball has the most kinetic energy and the least potential energy. At this point, the ball is moving at the maximum velocity.When the ball reaches Position 4, it bounces off the ground and loses some of its kinetic energy due to the collision. It bounces back up and begins to gain potential energy again. At position 2, the ball has the least kinetic energy and the most potential energy. The ball stops momentarily at this position before falling again.Hence, the rubber ball has the greatest kinetic energy and the least potential energy at position 3.

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The volume at 35°C is approximately 69.86 liters

The solution to the problem: "A mass of gasoline occupies 70.01 at 20°C.  the volume at 35°C" is given below:Given,M1= 70.01; T1 = 20°C; T2 = 35°CVolume is given by the formula, V = \frac{m}{ρ}

Volume is directly proportional to mass when density is constant. When the mass of the substance is constant, the volume is proportional to the density. As a result, the formula for calculating density is ρ= \frac{m}{V}.Using the formula of density, let's find out the volume of the gasoline.ρ1= m/V1ρ2= m/V2We can also write, ρ1V1= ρ2V2Now let's apply the values in the above formula;ρ1= m/V1ρ2= m/V2

ρ1V1= \frac{ρ2V2M1}{ V1}  = ρ1 (1+ α (T2 - T1)) V1V2 = V1 / (1+ α (T2 - T1)) Given, M1 = 70.01; T1 = 20°C; T2 = 35°C

Therefore, V2 = \frac{V1 }{(1+ α (T2 - T1))V2}=\frac{ 70.01}{(1 + 0.00095 * 15) } [α for gasoline is 0.00095 per degree Celsius]V2 = 69.86 liters (approx)

Hence, the volume at 35°C is approximately 69.86 liters.

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The snake and rat both share the same ancestor population that had a quadrate bone, which was inherited from an ancestor population.

A homo-logous structure is a trait that may or not have the same function but has a common evolutionary origin.

A homo-logous structure can be used to trace the evolutionary relationships between species.

Conversely, an analogous structure has the same function but it does not reflect an evolutionary origin.

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An example of no work after the effort is work done by the collie to travel a distance in a straight line by lifting a mass.

In physics, the word "work" involves the measurement of energy transfer that takes place when an item is moved over a range by an externally applied, at least a portion of which is applied within the direction of the displacement.

The length of the path is multiplied by the element of a force acting all along the path to calculate work if the force is constant. The work W is theoretically equivalent towards the force f times the length d, or W = fd, to portray this concept.

The amount of work done by the coolie to travel a certain distance in a straight line by lifting a certain amount of mass. Here the work done is zero because when the coolie lifted the mass the force exerted in the upward direction makes an angle of 90° and as per the formula of work done it will be equal to zero.

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Answer:

9miles average speed and 23 seconds

Answer:

There’s nothing in the pic

Explanation:

Just like my bf ... nonexistent