an object that completes 20 vibrations in 10 seconds has a frequency of a. 1 hertz. b. 0.5 hertz. c. 2 hertz. d. 200 hertz.

Answer:

The wavelength of the wave in shallow water is 2.91 m.

Explanation:

Given;

frequency of the wave, f = 1.1 Hz

speed of the wave in deep water, v₁ = 5.7 m/s

speed of the wave in shallow water, v₂ = 3.2 m/s

The wavelength of the wave in the deep water is calculated as;

λ₁ = v₁/f

λ₁ = 5.7 / 1.1

λ₁ = 5.18 m

The wavelength of the wave in the shallow water is calculated as;

λ₂ = v₂/f

λ₂ = 3.2 / 1.1

λ₂ = 2.91 m

Therefore, the wavelength of the wave in shallow water is 2.91 m.

force= mass × acceleration

(a) The potential difference across the resistor is 10.287 V.
(b) The potential difference across each of the two sections of wire is equal to the potential difference across the resistor, 10.287 V.
(c) The rate at which energy is lost to thermal energy in the resistor is determined by the formula:
Power = Voltage x Current
Where P is power (in watts), V is voltage (in volts) and I is current (in amperes). The current is determined by the resistance of the resistor, and the voltage is the potential difference across the resistor, 10.287 V. So, the rate at which energy is lost to thermal energy in the resistor is 10.287 V x I, where I is determined by the resistance of the resistor.
(d) The rate at which energy is lost in each of the two sections of wire is determined by Ohm's Law:
V = I x R
Where V is voltage (in volts), I is current (in amperes) and R is resistance (in ohms). The current is determined by the resistance of the two sections of wire and the voltage is the potential difference across the two sections of wire, 10.287 V. So, the rate at which energy is lost in each of the two sections of wire is 10.287 V x I, where I is determined by the resistance of the two sections of wire.

In summary, the rate at which energy is lost to thermal energy in the resistor is determined by the potential difference across the resistor (10.287 V) and the resistance of the resistor, while the rate at which energy is lost in each of the two sections of wire is determined by the potential difference across the two sections of wire (10.287 V) and the resistance of the two sections of wire.

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When the absorption spectrum of light from distant galaxies is measured it is found that lines in absorption spectrum are shifted towards the red end of  spectrum.

What is Absorption Spectrum ?

The Absorption Spectrum is constituted by the frequencies of light transmitted with dark bands when electrons absorb energy in ground state to reach higher energy states. Absorption Spectrum is produced when atoms absorb energy .

The Absorption Spectroscopic technique that is used for measuring the absorption of radiation as it interacts with sample.

So , we conclude that , after measurement of absorption spectrum of light it is found that the lines in absorption spectrum are shifted towards the red end of  spectrum.

Therefore , the result after measurement of absorption spectrum of light from distant galaxies is explained above .

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Answer:

Transverse wave

Explanation:

Its because in transverse wave the particle displacement is perpendicular to the direction of wave propagation..hope it helps you...

a) The speed of light in the glass is the same as the speed of light in a vacuum, which is around 3x10⁸ m/s ; b) There are 1.00 mm / 4x10⁻⁷ m = 2.5 million wavelengths of the light inside the glass slide.

a.) The speed of light in glass is typically slower than the speed of light in a vacuum. The refractive index of glass is typically around 1.5, which means that the speed of light in glass is around 2x10⁸ m/s. However, we can use Snell's law to calculate the exact speed of light in this particular glass microscope slide. Snell's law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the indices of refraction of the two media. Since the incident light is coming from air, which has an index of refraction of 1, and entering the glass slide, which has an index of refraction of around 1.5, we can use the following equation:

sin(incident angle)/sin(refracted angle) = n(glass)/n(air)
sin(incident angle)/sin(refracted angle) = 1.5/1
sin(incident angle)/sin(refracted angle) = 1.5

We don't know the angle of incidence or refraction, but we do know that they are equal because the light is entering the slide perpendicular to its surface (i.e. at 90 degrees). This means that sin(incident angle) = sin(refracted angle), and we can simplify the equation to:

sin(incident angle)/sin(incident angle) = 1.5
1 = 1.5

This is obviously not true, so there must be a mistake somewhere. The mistake is that we assumed the incident angle was 90 degrees, but it is actually given by the problem as being 0 degrees (i.e. the light is entering perpendicular to the surface). This means that the incident angle is equal to the refracted angle, and we can use Snell's law again to find the speed of light in the glass:

sin(0)/sin(refracted angle) = 1.5/1
0/sin(refracted angle) = 1.5
sin(refracted angle) = 0
refracted angle = 0

This means that the light does not refract (i.e. bend) as it enters the glass, but instead continues in a straight line. Therefore, the speed of light in the glass is the same as the speed of light in a vacuum, which is around 3x10⁸ m/s.

b.) The wavelength of the incident light is given as 600 nm, or 6x10⁻⁷ m. To find how many wavelengths of the light are inside the 1.00 mm thick glass slide, we need to know the refractive index of the glass (which we already found to be around 1.5) and the angle of incidence (which we know to be 0 degrees). We can use the following equation:

wavelength inside glass = wavelength in air / refractive index of glass

wavelength inside glass = 6x10⁻⁷ m / 1.5
wavelength inside glass = 4x10⁻⁷ m

This means that there are 1.00 mm / 4x10⁻⁷ m = 2.5 million wavelengths of the light inside the glass slide.

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You would be left with 1.25 g.

After 0.001 second, 10 grams decays to 5 grams.

After another 0.001 second, 5 g decays to 2.5 g. (Total time 0.002 s; two half-lives have passed)

After another 0.001 second, 2.5 g decays to 1.25 g. (Total time 0.003 s; 3 half-lives have passed)

The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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Actually Welcome to the Concept of the Current Electricity .

Since we know that, Current is Charge per unit time.

so we get as,

Q = I*t

here, Q = charge, I = current, t = time.

If the thickness of an absorber is 1.5 cm and 36.45% of a beam is attenuated by the absorber, The half-value layer is 0.51 cm.

The half-value layer (HVL) is a measure of the thickness of an absorber required to reduce the intensity of a beam to half its initial value. In this case, we are given that the absorber attenuates 36.45% of the beam.

To find the HVL, we can use the relationship between the percent attenuation and the thickness of the absorber. The HVL is the thickness at which the beam is attenuated to 50% or 0.5 of its initial intensity.

Since 36.45% of the beam is attenuated by the absorber, the remaining intensity is 100% - 36.45% = 63.55% or 0.6355 of the initial intensity.

We can set up the following equation:

0.5 = 0.6355^x

Solving for x, we find x ≈ 0.51.

Therefore, the half-value layer is approximately 0.51 cm, indicating that a thickness of 0.51 cm of the absorber is required to reduce the beam intensity to half its initial value.

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Answer:

0.248 m

Explanation:

Answer:

No force is more familiar than gravity — it's what keeps our feet on the ground, after all. And Einstein's theory of general relativity gives a mathematical formulation for gravity, describing it as a “warping” of space.

The measurement of electrical pressure is voltage, and the symbol for voltage in Ohm's Law is "V."

Ohm's Law states that the voltage (V) across a conductor is equal to the product of the current (I) flowing through the conductor and the resistance (R) of the conductor:

V = I * R

In this equation, "V" represents the voltage in volts, "I" represents the current in amperes, and "R" represents the resistance in ohms.

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Answer:

10000 Bq / 625 Pq = 16

Radioactivity has decreased by a factor of 16

2^4 = 16

So the sample has gone thru 4 half-lives

24 da / 4 = 6 da

6 da is the half-life

Cycling

Walking

Shopping

Exercising

Dancing

Playing physical games

Sport

Cooking

Working around the house

Gardening

Hope this helps:D

Answer:

Ionic and covalent bonding produce compounds, while hydrogen bonding and Van der Waals forces join separate molecules together.

Ur welcome:)

Answer:

C) lonic and covalent bonding produce compounds, while hydrogen bonding and Van der Waals forces join separate molecules together.

Explanation:

The mass of oil contained in the tank is 2400 kilograms.

To calculate the mass of oil contained in the tank, we need to determine the volume of oil first. The volume of the oil can be calculated using the formula:

Volume = Base Area × Height

Given:

Base Area = 2.5 square meters

Height = 1.2 meters

Volume = 2.5 m² × 1.2 m

Volume = 3 cubic meters

Next, we can calculate the mass of the oil using the formula:

Mass = Density × Volume

Given:

Density of oil = 800 kg/m³

Volume = 3 cubic meters

Mass = 800 kg/m³ × 3 m³

Mass = 2400 kilograms

Therefore, the mass of oil contained in the tank is 2400 kilograms.

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Answer:

6kgm/s

Explanation:

Given parameters:

Mass of block = 2kg

Velocity  = 3m/s  

Unknown:

Momentum = ?

Solution:

Momentum is the amount of velocity a body possess. It is a vector quantity.

 Momentum  = mass x velocity  

Now insert the parameters and solve;

  Momentum  = 2 x 3  = 6kgm/s

The statement seems to have a mix-up. To clarify, Republicans typically favor less control by the federal government and more control by the people and states, while Democrats generally support a stronger federal government. Here's a brief explanation of their stances:

1. Republicans: They believe in limited government intervention in individuals' lives and emphasize the importance of states' rights. This often includes supporting policies such as lower taxes, fewer regulations, and decentralized decision-making. Republicans argue that these policies promote economic growth, individual liberties, and greater autonomy for states to address their unique issues.

2. Democrats: They advocate for a more active role of the federal government in regulating various aspects of society, such as healthcare, education, and environmental protection. Democrats argue that a strong central government is necessary to ensure equal opportunities for all citizens and to provide essential services. They believe that certain issues, such as climate change and social justice, require a unified approach and cannot be effectively tackled by individual states alone.

In summary, Republicans generally support more control by the people and states, while Democrats tend to favor a stronger federal government. This distinction reflects their differing views on the most effective way to address societal issues and promote prosperity.

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Answer:

Explanation:

The dinosaurs first appeared in the Mesozoic and the first mass extinction occurred during the Paleozoic. Moreover, humans first appeared in the Cenozoic.

The dinosaurs emerged during the Triassic Period of the Mesozoic Era, approximately 220-225 million years ago.

The first mass extinction occurred in the Ordovician Period (the second period of the Paleozoic Era).

The Cenozoic is the current geological Era that encompasses the last 60 million years.

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Answer:

Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects. so the answer is thermal energy

To derive the expression for the period of a physical pendulum with a finite-sized ball, we need to consider the total moment of inertia of the pendulum.

Using the parallel axis theorem, we can calculate the total moment of inertia of the pendulum, which is the sum of the moment of inertia of the ball and the moment of inertia of the pendulum rod. The moment of inertia of the ball about an axis through the centre of the ball is given by:

I_ball = (2/5) * m * r^2, where m is the mass of the ball and r is the radius of the ball.

The moment of inertia of the pendulum rod can be approximated as:

I_rod = m * L^2, where L is the length of the pendulum.

The total moment of inertia of the pendulum is the sum of these two components:I_total = I_ball + I_rod.

Substituting the values of I_ball and I_rod: I_total = (2/5) * m * r^2 + m * L^2., Now we can use this expression for the total moment of inertia in the formula for the period of the physical pendulum:

T = 2π * sqrt(I_total / (m * g * h)).

Substituting the value of I_total:

T = 2π * sqrt(((2/5) * m * r^2 + m * L^2) / (m * g * h)).

Simplifying the expression:

T = 2π * sqrt((2/5 * r^2 + L^2) / (g * h)).

Therefore, the expression for the period of a physical pendulum with a finite-sized ball is T = 2π * sqrt((2/5 * r^2 + L^2) / (g * h)).

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Fault withstand capability is the equipment's ability to endure a fault current within its rating until the overcurrent device interrupts the circuit.

Fault withstand capability refers to the ability of an electrical equipment assembly to withstand a fault current equal to or less than its rating for the duration it takes for the specified overcurrent protective device to open the circuit.

This characteristic is crucial for ensuring the safety and integrity of electrical systems during faults, such as short circuits or ground faults.

A robust fault withstand capability helps prevent equipment damage, fires, and potential hazards to personnel.

Properly selecting and coordinating overcurrent protective devices can maximize fault withstand capability and maintain system reliability.

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Answer:

256

Explanation:

The statement by Dalton that was later proven false is: Atoms of different elements are not identical. The correct option is c.

Dalton's atomic theory, proposed in the early 19th century, consisted of several postulates about the nature of atoms. While many of his statements have been validated by scientific evidence, one statement has been proven false.

Dalton believed that atoms of different elements are identical, meaning that all atoms of a given element have the same properties and characteristics. However, this statement was later disproven with the discovery of isotopes. Isotopes are atoms of the same element that have different numbers of neutrons, resulting in variations in their atomic mass. For example, carbon-12 and carbon-14 are isotopes of carbon, with carbon-12 being the most abundant and carbon-14 being radioactive.

The discovery of isotopes demonstrated that atoms of the same element can have different masses, thus refuting Dalton's assertion of identical atoms for different elements. This discovery expanded our understanding of atomic structure and the diversity that exists within the periodic table of elements.

Therefore, statement c. Atoms of different elements are not identical, was later proven false through scientific advancements.

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Which of Dalton's statements about the atom was later proven false? a. Atoms cannot be subdivided. b. Atoms are tiny. c. Atoms of different elements are not identical. d. Atoms join to form molecules.