compared with the frequency of illuminating light on a sheet of transparent plastic, the frequency of light that is transmitted

Answer:

an option in motion stays in motion untill it is put to rest.

Explanation: When u kick a ball into the net to score it will go until it is stopped by the net.

Answer:

In layman's terms, burning hydrogen results in water: H2 + 1 2 O2 −→ H2O + 286, 000 joules. This combustion reaction also releases 286,000 joules of energy per mole of hydrogen gas burned.

Explanation:

A projectile is launched at an angle of 33⁰ above the horizontal, then the projectile launched at an angle of 90 - 33 = 57⁰ will have the same range as the projectile launched at 33⁰. The correct option is (B) 57⁰.

In the absence of air resistance, a projectile launched at an angle of 33 above the horizontal will have the same range as a projectile launched at an angle of 57⁰.

The range of a projectile can be determined by using the range formula.

R = ((v^2 * sin(2θ))/g) Where

R is the range of the projectile,

v is the velocity of the projectile,

θ is the angle at which the projectile is launched, and

g is the acceleration due to gravity.

In the absence of air resistance,

the horizontal component of velocity of a projectile remains constant throughout the flight.

So, the range of a projectile depends only on its initial velocity and the angle at which it is launched.

If a projectile is launched at an angle θ,

the time of flight of the projectile can be calculated by using the following formula:

T = (2v * sin(θ))/g

The maximum height reached by the projectile is given by the formula:

H = (v^2 * sin^2(θ))/2gIf a projectile is launched at an angle θ, then the range of the projectile will be the same as the range of the projectile launched at an angle of (90 - θ).

So, if a projectile is launched at an angle of 33⁰ above the horizontal, then the projectile launched at an angle of 90 - 33 = 57⁰ will have the same range as the projectile launched at 33⁰.

Therefore, the correct option is (B) 57⁰.

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Answer:

90,000 meters

Explanation:

75*1200 = 90,000

Answer:

The frequency of the phonograph record is 0.2 Hz

Explanation:

The frequency of an object moving in uniform circular motion is the number of completed cycles the object makes in a specified time period

The given parameters of the phonograph record are;

The radius of the record = 0.15 m

The number of times the phonograph record rotates, n = 18 times

The time it takes the phonograph record to rotate the 18 times, t = 90 seconds

The frequency of the phonograph record, f = (The number of times the phonograph record rotates) ÷ (The time it takes the phonograph record to rotate the 18 times)

∴ The frequency of the phonograph record, f = n/t = 18/(90 s) = 0.2 Hz

The frequency of the phonograph record = 0.2 Hz.

The more distant planet experiences one-sixteenth as much gravitational force from the star as the closer planet.

According to Newton's law of universal gravitation, the gravitational force between two objects is inversely proportional to the square of the distance between them. In this scenario, since the more distant planet is four times as far from the star as the closer planet, the distance between the more distant planet and the star is twice the distance between the closer planet and the star.

Using the inverse square relationship, we can calculate the ratio of gravitational forces:

(1/distance^2) : (1/(2 * distance)^2) = 1 : (1/4) = 4 : 1

Therefore, the more distant planet experiences one-sixteenth as much gravitational force from the star as the closer planet.

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Answer:50m

Explanation:

Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

If Levi drove south for two hours and covered a distance of 160 kilometers, then his average speed for the entire trip was:

average speed = total distance / total time = 160 km / 2 h = 80 km/h

Let d(t) be the distance that Levi has driven at time t. Then we have:

d(0) = 0 (starting position)

d(2) = 160 km (final position)

d(1) = 80 km (distance traveled halfway through the trip)

The average speed between time t1 and t2 is given by:

average speed = (d(t2) - d(t1)) / (t2 - t1)

At time t=1, we have:

average speed = (d(2) - d(1)) / (2 - 1) = (160 km - 80 km) / 1 h = 80 km/h

This is consistent with the earlier calculation of the average speed for the entire trip.

The instantaneous speed at time t=1 is given by the derivative of the distance function with respect to time:

instantaneous speed = d'(1)

Using calculus, we can find:

d(t) = 40t^2

d'(t) = 80t

Therefore, the instantaneous speed at time t=1 is:

instantaneous speed = d'(1) = 80 km/h

So Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.

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Energy is 4 * 10⁵ J

The rate of dissipation is 2 * 10⁴ W

In the question, it is given that

t = 20 s

R = 400 mm

L = 300 mm

where t, R, and L are time, radius, and length.

For magnetic energy density, the formula is

ηo = Energy / volume

    = β^2 / 2 * μ

Now, substituting the values

=  2²/ 2 * 4 * Π * 10⁻⁷

= 1.59 * 10⁻⁶ J / m^3

Now, energy is

= energy density * volume

= 1.59 * 10⁻⁶ *  Π * 0.5 * 0.4²

= 4 * 10⁵ J

The rate of dissipation is

= Energy / time

=  4 * 10⁵ / 20

= 2 * 10⁴ W

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because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant

hope it helps you

The frequency of the sound wave in air will be the same as the frequency of the vibrating wave on the string, while the amplitude and wavelength will be different.

When a string vibrates, it creates a sound wave that travels through the air. The frequency of the sound wave in air will be the same as the frequency of the vibrating wave on the string, since they are both determined by the speed of the vibrating string. However, the amplitude of the sound wave in air will be different than the amplitude of the vibrating wave on the string, since the amplitude of a sound wave is determined by the intensity of the wave and the distance it has traveled from its source.

Similarly, the wavelength of the sound wave in air will be different than the wavelength of the vibrating wave on the string, since the wavelength of a sound wave is determined by the speed of sound in air and the frequency of the wave. In summary, while the frequency remains constant, the amplitude and wavelength of the sound wave in air will be different from those of the vibrating wave on the string.

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Answer:

a 6.5 m

Explanation:

\(f = kx = > x = \frac{f}{k} = \frac{78}{12} = 6.5 m\)

Answer:

True!

Explanation:

Scientists usually state or determine the average temperature/precipitation over a long period of time. Several different tables or graphs are used to prove and check that this is true. Hope this helps!

Answer:

c. It brings reactant molecules together.

Explanation:

Catalysts in chemical reactions works by bringing reactant molecules together thereby making the reaction proceed much faster.

A catalyst is any substance that speeds up the rate of chemical reactions. Sometimes, the activation energy of reactions are very great. This makes chemical reactions very difficult to proceed.

When a catalyst is introduced, they take the reactants and bring them close enough. This way, the activation barrier is lowered and the reaction can proceed.

Answer:

C) It brings reactant molecules together.

Explanation:

A.P.E.X

The two critical factors that lead to a greater distance of travel of the moving debris during a rockfall are the height of the fall and the initial velocity of the rocks or debris.

A rockfall is a natural disaster that occurs when rocks or debris become dislodged from a steep slope or cliff and move downhill under the influence of gravity. The distance traveled by the moving debris during a rockfall depends on several factors, including the angle of the slope, the size and shape of the rocks or debris, and the surface characteristics of the slope.

However, two critical factors that lead to a greater distance of travel of the moving debris during a rockfall are the height of the fall and the initial velocity of the rocks or debris.

Firstly, the height of the fall plays a crucial role in determining the distance traveled by the moving debris. The higher the height of the fall, the more potential energy the rocks or debris possess. As the debris falls, this potential energy is converted into kinetic energy, increasing the velocity of the moving debris. Therefore, rocks or debris that fall from a greater height will have a higher initial velocity and travel further down the slope before coming to a stop.

Secondly, the initial velocity of the rocks or debris is another factor that determines the distance traveled during a rockfall. The initial velocity of the debris depends on the angle of the slope, the size and shape of the rocks or debris, and the surface characteristics of the slope. If the slope angle is steep, the initial velocity of the debris will be higher, leading to a greater distance traveled by the moving debris.

In conclusion, the two critical factors that lead to a greater distance of travel of the moving debris during a rockfall are the height of the fall and the initial velocity of the rocks or debris.

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Answer:

Higher launch angles have higher maximum height.The maximum height is determined by the initial vertical velocity. Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.

Explanation:

Answer:

Explanation:

0.02

0.604

70,230

becuase if you take away the 0 then it would change the value of the number

Answer:

The Lunar month is the time period for the moon to complete ONE revolution around Earth. SIDEREAL MONTH: 27.3 days SYNODIC MONTH: 29.5 days

Answer:

Weight

Explanation:

"An object will float if the buoyancy force exerted on it by the fluid balances its weight, i.e. if FB=mg F B = mg . But the Archimedes principle states that the buoyant force is the weight of the fluid displaced. So, for a floating object on a liquid, the weight of the displaced liquid is the weight of the object."

Hope this helps! :)

Answer:

0.75kg into gram = 0.75 * 1000 = 750g

potential energy = mgh

potential energy = 750 * 10 * 0.35

potential energy = 2625 joules

Answer:

The correct option is;

3. The total mechanical energy is constant as the block moves back and forth

Explanation:

The total mechanical energy is the sum of the potential and kinetic energies of the system

For a system that is isolated from the effects of external forces, but being acted upon by the internal conservative forces within the system, the total mechanical energy is constant

For a black and spring system, we have total mechanical energy, E = 1/2×K×A².

Where;

K = Constant

A = The amplitude of motion

Therefore, where there is no loss to friction, with A, remaining constant, the total mechanical energy will be constant.

The soil loss in  \(Mg ha^{-1}\) (Ton/ha) if the bulk density of the soil is 1.01  \(Mg m^{-3}\)  is option a. 0.202 Mg/ha.

For expressing the soil loss in \(Mg ha^{-1}\), need to convert the units appropriately. First, convert the soil loss from millimetres (mm) to meters (m) by dividing it by 1,000 (1 mm = 0.001 m). Thus, the soil loss is 0.0002 m.

Next, calculate the volume of soil lost per unit area (ha). The volume can be obtained by multiplying the soil loss (0.0002 m) by the area (ha). Since the bulk density of the soil is given as 1.01 \(Mg m^{-3}\), can convert the volume to mass by multiplying it by the bulk density.

Using the formula:

Soil loss (Mg ha-1) = Soil loss (m) × Bulk density (\(Mg m^{-3}\)) × Area (ha)

Substituting the values:

Soil loss (\(Mg ha-1\)) = 0.0002 m × 1.01 \(Mg m^{-3}\) × 1 ha

Calculating the result:

Soil loss (\(Mg ha-1\)) = 0.0002 × 1.01 = 0.000202 \(Mg ha-1\)

Therefore, the correct answer is option a. 0.202 Mg/ha.

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The toddler's change in velocity in metres per second is 1.68 m/s

To answer the question, we need to know what acceleration is

Acceleration is the change in velocity of an object with time. It is given by

a = Δv/Δt where

Making Δv subject of the formula, we have

Δv = aΔt

Since the toddler's accleration is 0.24 m/s² and got up from a nap and ran for 7.0 seconds,

Substituting the values of the variables into the equation, we have

Δv = aΔt

Δv =  0.24 m/s² × 7.0 s

Δv =  1.68 m/s

So, the toddler's change in velocity in metres per second is 1.68 m/s

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When a switch is closed, the electrons from the battery will reach the bulb at the speed of light or 299,792,458 meters per second. So, it will take approximately 3.34 x \(10^{-9}\) seconds for electrons from the battery to reach the bulb.

Electric current is the flow of electric charges. The flow of electric charges through a circuit is known as current. It is defined as the rate of flow of electric charges through a conductor. The SI unit of electric current is Ampere (A). Electric charge is a fundamental property of matter that results from an imbalance in the number of protons and electrons present in an atom or molecule. When the number of electrons is more than the number of protons, an atom or molecule is said to be negatively charged.

On the other hand, when the number of electrons is less than the number of protons, an atom or molecule is said to be positively charged. Electric potential is the work done per unit charge by an external force in moving a positive charge from infinity to a point in the electric field. The electric potential difference between two points in an electric field is the work done per unit charge by an external force in moving a positive charge from one point to another in the electric field.

The SI unit of electric potential difference is also volt (V). Therefore, , it will take approximately 3.34 x \(10^{-9}\) seconds for electrons from the battery to reach the bulb.

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Trees are being felled at an alarming rate by people. Forests are home to numerous animals and people, and by removing trees from them, we are destroying their habitat and depriving them of a safe haven.

Community conservation refers to a strategy for protecting the environment that acknowledges local residents' rights to manage wildlife or gain both direct and indirect benefits from it.

The gorillas' habitat, the forest, is being destroyed by humans. Additionally, people are harming these creatures, and if this continues, gorillas may become extinct.

There won't be as many resources from trees, like paper, if people cut down less of them, therefore prices could rise.

Prices for tourists will increase if fewer gorillas are still alive. That won't benefit visitors since they will have to pay more, and since some individuals don't have a lot of money, there will be fewer visitors.

Thus, this way, community conservation is mandatory.

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The units of kwh (kilowatt hours) are used when measuring energy consumption. Kilowatt-hours represent the amount of energy consumed by an electrical device or system over a period of time. For example, if a device consumes 1 kilowatt of power for 1 hour, it will use 1 kwh of energy.

This unit of measurement is commonly used by energy companies to determine how much electricity a household or business has consumed. It is also used by consumers to track their own energy usage and to compare the energy efficiency of different devices. By measuring energy usage in kwh, it is possible to accurately track and monitor energy consumption, which can help individuals and organizations to identify areas where they can reduce energy waste and save money on their utility bills.

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Answer:

To holds the legs apart without rupturing any vein

Explanation:

The purpose of using string to tie the forelegs and hind legs during dissection is to hold the legs apart without rupturing ant vein or artillery for easy dissection procedure( the dismembering of the body of a deceased animal or plant to study its anatomical structure)

when tieing the forelegs and the hind legs the same string is used to tie them and the string is then passed/looped under the dissecting table/tray this way the legs will be held apart and the dissection can commence.

Answer:

D

Explanation:

I could be wrong, But I'm pretty sure it's D

The magnitude of the point charge is approximately 2.7 x 10⁻⁸ coulombs.

We can use Coulomb's law to solve for the magnitude of the point charge. Coulomb's law states that the electric field, E, at a distance r from a point charge, q, is given by: E = k * (q / r²)

where k is Coulomb's constant, which is approximately equal to 8.99 x 10⁹ N * m² / C².

In this case, we are given the electric field magnitude, E = 2.3 n/C, and the distance from the point charge, r = 56 cm = 0.56 m. We can rearrange Coulomb's law to solve for the magnitude of the point charge, q: q = E * r² / k

Substituting the given values, we get: q = (2.3 n/C) * (0.56 m)² / (8.99 x 10⁹ N * m² / C²)

q = 2.7 x 10⁻⁸ C

Therefore, the magnitude of the point charge is approximately 2.7 x 10⁻⁸ coulombs.

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