Select the correct answer.
what is the value of log3^9

Answer:

The mass of object is 300g.

Its weight on earth is W×0.3kg×9.8m/s2=2.94 N

Its weight on moon is A 300 g would be 48 g on the moon

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Cocaine is considered a stimulant drug because it tends to increase overall levels of neural activity. This drug stimulates the central nervous system, leading to increased energy, alertness, and elevated mood. It is a potent and addictive drug that is derived from the leaves of the coca plant.

Cocaine works by blocking the reuptake of dopamine, norepinephrine, and serotonin, which are neurotransmitters that are responsible for regulating mood and behavior. When these neurotransmitters are released, they produce feelings of pleasure and reward. Cocaine use can lead to tolerance, dependence, and addiction, as well as a range of negative health effects such as heart attack, stroke, and respiratory failure.

In conclusion, Cocaine is considered a stimulant drug because it tends to increase overall levels of neural activity.

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The  speed when it hits the ground is option (B) 15.5 m/s.

To determine the speed of the object when it hits the ground, we can use the principle of conservation of energy. The initial potential energy of the object is converted into kinetic energy as it falls.

The change in gravitational potential energy is given as ΔPE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height.

We know that ΔPE = 565 J, and the height h = 12.0 m.

Since the object is initially at rest, its initial kinetic energy is zero.

The total mechanical energy (sum of potential and kinetic energy) is conserved, so:

ΔPE = ΔKE

mgh = (1/2)mv^2

Here, m cancels out, giving:

gh = (1/2)v^2

Substituting the known values:

(9.8 m/s^2)(12.0 m) = (1/2)v^2

117.6 = (1/2)v^2

Dividing both sides by (1/2):

235.2 = v^2

Taking the square root of both sides:

v ≈ 15.33 m/s

Therefore, the speed of the object when it hits the ground is approximately 15.33 m/s.

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Answer:13.6

Explanation:

Answer:

When a bullet is fired from a gun, total momentum before is zero since nothing is moving. After firing the bullet there is a momentum in the forward direction. ... The faster an object is moving or the more mass it has, the more momentum it has in the direction of its motion (momentum = mass velocity).

Self-esteem is based on the opinions and beliefs of the individuals. This helps us to value or perceive ourselves. It defines your self-worth and how you treat yourself.

Self-esteem refers to the positive (high self-esteem) and negative (low self-esteem) feelings that we have ourselves. High self-esteem or positive self-esteem is defined as self-love,self-value, self-respect, and dignity.

Positive self-esteem means believing in your own capability to do things on your own. When there is a lack of self-confidence, self-love leads to negative self-esteem.

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Answer:

R = 4.77 ohms

Explanation:

Four resistors are given such that,

R₁ = 2 ohms

R₂ = 3 ohms

R₃ = 5 ohms

R₄ = 10 ohms

Here, R₁ and R₂ in series. The equivalent is given by :

R₁₂ = R₁ + R₂

= 2 + 5

R₁₂ = 7 ohms

Similarly, R₃ and R₄ are in series. so,

R₃₄ = R₃ + R₄

= 10+5

R₃₄ = 15 ohms

Now, R₁₂ and R₃₄ are in parallel. So,

\(\dfrac{1}{R}=\dfrac{1}{R_{12}}+\dfrac{1}{R_{34}}\\\\\dfrac{1}{R}=\dfrac{1}{7}+\dfrac{1}{15}\\\\R=4.77\ \Omega\)

So, the equivalent resistance s 4.77 ohms.

The mechanical advantage of Owen’s pulley system is determined as  2.

Mechanical advantage is also known as force ratio, it determines the ratio of output force to input force.

It can also be expressed as the ratio of load to to effort applied in overcoming the load.

M.A = load / effort

The given parameters include;

M.A = 160 N / 80 N

M.A = 2

Thus, the mechanical advantage of a machine is the ratio of output force to input force.

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Answer:

An article written by a scientist .

Explanation:

Primary sources information are those that contain first  hand information probably from the place of the activities or by the original contact of the information (source ) .

So primary information is normally contained in artifact , journals , letter , dissertations manuscripts  , videos and audio recordings .

The fact that the article is written by the scientist means he is the one who has the original information hence he is the first person to access the information , meaning he is the original owner .

Answer:

A. Astanding wave is generated

Explanation:

Standing waves arise from the interference of traveling and reflected waves, which have the same wavelength at the point of reflection, but mutually opposite directions of propagation.

These gamma rays can ionize the Earth's upper atmosphere, causing a chain reaction of ionization and emission of secondary radiation.

Gamma-ray bursts (GRBs) are some of the most energetic events in the universe, emitting vast amounts of energy in the form of gamma rays, which are highly energetic electromagnetic radiation. These bursts occur when a massive star collapses or when two neutron stars merge, resulting in the release of an enormous amount of energy.

Even though GRBs are located at great distances from Earth, they can still deliver an enormous amount of energy to our planet. This is because gamma rays are highly energetic and can travel through space at the speed of light without being significantly absorbed or scattered by interstellar medium.

When a gamma-ray burst occurs, it emits a highly focused beam of gamma rays, which can be detected by satellites and telescopes in space. Even though the beam is highly focused, it can still release a tremendous amount of energy, which can be detected even from great distances.

Moreover, the energy from gamma-ray bursts is so enormous that it can ionize the Earth's upper atmosphere, causing a chain reaction of ionization and emission of secondary radiation, such as X-rays and radio waves.

This secondary radiation can be detected by instruments on the ground and in space, which allows scientists to study the properties of the gamma-ray bursts and learn more about the universe.

In summary, the highly energetic gamma rays emitted by gamma-ray bursts can travel through space without being significantly absorbed or scattered by interstellar medium, and can ionize the Earth's upper atmosphere, resulting in the emission of secondary radiation that can be detected by instruments on the ground and in space.

This allows us to receive and detect the tremendous amount of energy released by gamma-ray bursts, even though they are located at great distances from Earth.

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Answer:

Explanation:

The collision between the 93kg fullback and the 127kg defensive tackle is an example of an inelastic collision. In an inelastic collision, the total kinetic energy of the system is not conserved as some of the energy is transformed into other forms such as heat or sound. The resulting final speed of both players would be 0m/s, indicating that they have come to a stop after the collision.

At aphelion, the Earth is 96% of the Earth-sun distance at aphelion which means that the correct statement is that at aphelion, because the gravitational attraction is lower, the speed of the Earth is higher and is denoted as option B.

This is referred to as the  farthest point in the orbit of a planet such as the earth from the sun.

In a a scenario where the Earth is 96% of the Earth-sun distance at aphelion, then it means that the orbit has almost been completed which means that a high amount of speed was involved in the process.

This is as a result of the gravitational attraction being lower which has an inverse relationship with the speed of the Earth which is why it was higher and is therefore the reason why option B was chosen.

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Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

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Answer:

Basically, the main risk is cardiac arrest, caused by the electric current interfering with the normal operation of the heart muscle. Other possible damages are burns due to the electric energy vaporizing the water inside the cells, and nerve damage caused by excessive current through the nerves.

The main hazards of working with electricity are:

Explanation:

Answer:

The final velocity of the car after the acceleration takes place is 13 m/s.

Explanation:

The final velocity can be calculated using the following equation:

\( V_{f} = V_{0} + at \)

Where:

\(V_{0}\): is the initial velocity = 0 (starts from rest)

a: is the acceleration = 2 m/s²

t: is the time = 6.5 s

Hence, the final velocity is:

\( V_{f} = V_{0} + at = 0 + 2 m/s^{2}*6.5 s = 13 m/s \)

Therefore, the final velocity of the car after the acceleration takes place is 13 m/s.

I hope it helps you!

The temperature of a gas molecule is measured by the average translational kinetic energy

Answer:

The temperature of a gas is a measure of the average translational kinetic energy of the molecules. In a hot gas, the molecules move faster than in a cold gas; the mass remains the same, but the kinetic energy, and hence the temperature, is greater because of the increased velocity of the molecules

Explanation:

This is also from Go0gle because my explanation would've been an essay long .

but in shorter version if the gas molecules move fast it's hot an if it moves slow its cold hope this helps .

Answer:

please find attached file

Explanation:

Answer: 0.99m left

Explanation:

The formula:

Distance / Time = Rate

Fill in the formula

Distance / 0.55s = 1.8 m/s

Multiply both sides by 0.55s

Distance = 0.99m

Displacement = 0.99m to the left.

Answer:

-0.99 (See attached)

Explanation:

(See attached)

nesecitabas ayuda hace 1 hora, todavia la nesecitas?

Answer:

Explanation:

is this marked??

(a). The car's average velocity between t = 1.0s to t = 1.5s will be - \(1\;m/s\)

(b). The car's acceleration at t = 1.5s will be - \(0.4\;m/s^{2}\)

(c). Car's speed is increasing with time.

We have a a remote controlled toy car that starts from rest and begins to accelerate in a straight line.

We have to determine -

        t = 1.0 s  to  t = 1.5 s.

The rate of change of velocity with respect to time is called Acceleration. Mathematically -

\($a=\frac{dv}{dt}\)

According to the question, we have the following data for the Car -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m

PART - A

The car's average velocity between t = 1.0s to t = 1.5s will be -

\($v_{avg} = \frac{0.9-0.4}{1.5-1}= 1 m/s\)

PART - B

Velocity at t = 1.5 s will be -

\($v(1.5)=\frac{0.9}{1.5}= 0.6\;m/s\)

The car's acceleration at t = 1.5s will be -

\($a(1.5) = \frac{v}{t} = \frac{0.6}{1.5} = 0.4\;m/s^{2}\)

PART - C

Since, the acceleration of the car is positive, this means that the car is accelerating in the forward direction. Hence, its speed is increasing with time.

[ The following data was missing in your answer. The complete question would include this data also -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m ]

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Answer:

Explanation:

If a dog and horse are running with the same speed, kinetic energy of horse is more than the kinetic energy of the dog because the mass of a horse is more than the dog.

Yes, the student conducted an experiment in which an elastic collision occurred. The system of block x and block y is a closed system.

What is closed system?

A closed system is a system where the components are isolated from the environment. This type of system does not allow any kind of exchange of energy, matter, or information with the environment.

This means that the system is in a state of equilibrium, where the total energy and matter is conserved, and the system is not affected by any external influences.

Therefore, Yes, the student conducted an experiment in which an elastic collision occurred. The system of block x and block y is a closed system.

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When 70 Newton dog ran across the yard. we know The dog's weight. Hence option B is correct.

Force(F) applied on the body is mass(m) times its acceleration(a). i.e. F=ma according to this equation we get acceleration as a = this equation says that when we apply more force to the body, more acceleration it gets. When more is the mass of the body, greater force is needed to accelerate with same amount to that less mass.

70N dog means it is his weight, from which we can calculate its mass, by relation F = mg where g is acceleration due to gravity.

Hence for objective option B is correct, and for MSQ Both B and C is correct.

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Answer: Microscope is an instrument that is used for observing micro particles, cells, and nanosized particles.

Explanation:

Placing one hand below the stage of the microscope and other hand must be used to hold the arm of the microscope. This facilitates the safety of the microscope as it will provide support to the entire structure of the microscope and also to the lens and mirrors attached to the structure of the microscope. If any of the part get damaged or lost during carrying it will affect the overall functioning of the microscope.

Answer:

wrapping the electrical cord around the arm of the microscope

Explanation:

just took the test