A tennis ball is dropped from 1.58 m above the
ground. It rebounds to a height of 0.979 m.
With what velocity does it hit the ground?
The acceleration of gravity is 9.8 m/s-
Answer in units of m/s.

The wavelength is 1.87 m of these radio waves round your answer to 2 significant digits.

Radio waves are part of the electromagnetic spectrum, any radiation of that electromagnetic spectrum has a speed of 3.00x10⁸ m/s in vacuum.

Consequently, the following equation can be used to determine the wavelength:

c =  λ.ν --------- (1)

Where c is the speed of light, λ is the wavelength and  is the frequency.  

Then, λ can be isolated from equation 1

λ = c / ν --------- (2)

Keep in mind that Hz units must be used to express frequency.

ν = 160 MHz x (1000000Hz/1 MHz)

  = 160000000 Hz

λ = 3 x 10⁸ m/s / 160000000 Hz

But 1 Hz = s⁻¹

λ = 3 x 10⁸ m/s / 160000000 s⁻¹

λ = 1.87 m

Hence, the wavelength is 1.87 m

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Answer:

The average speed for the entire trip is 18.75 m/s.  How is average speed calculated?The average speed is the ratio of total length traveled to total time taken to travel that length.Thus, if then,where Sa is average speed of the traveller.WE cannot average the two speeds in conditions of equal distance. WE  need equal time.Here 15 m/s for 10 km would take 666.67 seconds.   and 25 m/s for another 10 km would take 400 seconds. The Total time: 1066.67 seconds. The Total distance 20 km. The  average speed =  20000 m/1066.67 seconds = 18.75 m/s.  If We had gone 15 m/s for the same *time* as going at 25 m/s, then we  could have averaged the speeds directly.  Hence, The average speed for the entire trip is 18.75 m/s.  Learn more about average speed here:brainly.com/question/12322912

Explanation:

A 2.0 kg object which is applied a 4.0 n force will travel 1.0 m in 1.0 seconds

To solve this exercise the formula for net force and the formula for uniformly varied rectilinear motion (UVRM) to be applied are:

Where:

Information about the problem:

Applying the net force formula and isolating the acceleration, we get:

F = m * a

a = F/m

a = 4.0 kg * m/s² / 2.0 kg

a = 2.0 m/s²

Applying the formula for UVRM we can calculate the distance:

x = vi * t + (a * t²) / 2

x = 0 m/s * 1 s + (2.0 m/s² * (1 s)²) / 2

x = (2.0 m/s² * 1 s² / 2

x = 2.0 m/ 2

x = 1.0 m

It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.

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The region near Tropic zone has the highest average temperatures all year round because the sunlight comes direct on the tropic zone.

In the regions between the equator and the tropics i.e. equatorial region, the solar radiation reaches directly the land vertically during daytime almost the whole year. The temperature is very hot and warm in these regions. Due to high temperatures, more water evaporates in this region and the air has more moisture and high humidity is present. Sunlight hits the Earth directly at the Equator. The sunlight spread over a large area, when we move from the Equator to the poles the temperature becomes decreases. Sunlight falls on a smaller surface area at the Equator so heats up very quickly as compared to the poles.

So we can conclude that Tropic zone has the highest average temperatures all year round because the sunlight comes direct on the tropic zone.

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c . The book has potential energy and the bike has kinetic energy statement is correct

Let's use an illustration to demonstrate P. E. and K.E. The hammer has potential energy, which it will have as you raise it higher. On the other hand, the hammer will have kinetic energy when you lower it to strike the surface of the table.

Only chemical energy, which is potential energy held inside the item and in the union of its atoms and molecules, is not regarded as kinetic energy. Motion is created by kinetic energy. Any item in motion has kinetic energy. The more kinetic energy an item possesses, the heavier and quicker it moves. The wheels of a bicycle spin when you push off the pedals.

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You are done with you vacation and you are about to go back to the u.s. then The local bank of 0.72 gdp is used.

The market worth of all the final goods and services produced and sold (not resold) in a certain time period by countries is measured in dollars using the term "gross domestic product" (GDP).

This measure is frequently amended before being regarded as a trustworthy indication due to its subjective and complex character.

To compare living standards between countries, using a basis of GDP per capita at purchasing power parity (PPP) may be more useful, whereas nominal GDP is more useful for comparing national economies on the global market. GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries.

Therefore, You are done with you vacation and you are about to go back to the u.s. then The local bank of 0.72 gdp is used.

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The greenhouse effect occurs because of the absorption and re-emission of infrared radiation by the atmosphere.

When visible light from the sun enters the earth, it passes through the atmosphere and is absorbed by materials on the earth's surface like rocks, soil and the ocean, which makes the earth heat up. These materials then re-emit infrared radiation. This radiation gets reabsorbed by certain gases in the atmosphere called greenhouse gases, further keeping the earth warm. This effect is known as the greenhouse effect.

The greenhouse effect is essential for all life on earth, as without it, the earth would be a cold, frozen place. However, the level of greenhouse gases in the atmosphere has increased in recent years, further increasing the temperature of the planet, resulting in what is called global warming.

The greenhouse gases include water vapour, methane, carbon dioxide and ozone.

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An object is thrown 16 m/s straight up from a 7 m tall cliff. 5.73 seconds  time does it take to hit the ground.

From the statement, We have object thrown straight up from a tall cliff and we have to determine how much time does it take to hit the ground below.

initial velocity [u] = 16 m/s

Height of cliff [h] = 7 m

Time taken by the object to attain maximum height with reference to cliff-

v = u + at

0 = u - gt

u = gt

t = u/g = 16/9.8 = 1.63 seconds

Maximum height attained with reference to cliff will be =v² - u² = 2aS

v = 0 [at maximum height]

-u² = - 2gS

u² = 2gS

S = u²/2g = (16 x 16)/(2 x 9.8) = 13.1 meters

Now, the all distance covered by the ball from maximum height untill it reaches the ground =

Downward distance (Max. height to cliff) + 7 m = 13.1 + 7 = 20.1 m

Now, time took  from top to reach the ground will be -

S = ut + 1/2 at²

S = 0 + 1/2 at²

S = 1/2 at²

t [2] = √2S/g = √(2 x 20.1)/(9.8) = 4.1 s

Hence, the time taken by the ball to hit the ground below will be =

1.63 + 4.1 = 5.73 seconds

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Answer:

Approximately [tex]4.9\; {\rm m\cdot s^{-1}}[/tex] backward, assuming that the canoe was initially stationary.

Explanation:

When an object of mass [tex]m[/tex] is moving at a velocity of [tex]v[/tex], the momentum [tex]p[/tex] of that object would be [tex]p = m\, v[/tex].

With a mass of [tex]m = 67\; {\rm kg}[/tex] and a velocity of [tex]v = 3.3\; {\rm m\cdot s^{-1}}[/tex] forward, the momentum of Fred would be [tex]p = m\, v = 67\; {\rm kg} \times 3.3\; {\rm m\cdot s^{-1}} = 22.11\; {\rm kg \cdot m \cdot s^{-1}}[/tex] (forward.)

Before the jump, the velocity of the boat and Fred were both [tex]0\; {\rm m \cdot s^{-1}}[/tex]. Hence, the momentum of both Fred and the boat would initially be [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex].

Momentum is preserved immediately after the jump. Thus, the momentum of Fred plus the momentum of the boat would still be [tex]0\; {\rm kg \cdot m \cdot s^{-1}}[/tex] after the jump.

Since the momentum of Fred was [tex]22.11\; {\rm kg \cdot m \cdot s^{-1}}[/tex], the momentum of the boat would be [tex](-22.11\; {\rm kg \cdot m \cdot s^{-1}})[/tex] (backward, as the negative sign indicates.)

Rearrange [tex]p = m\, v[/tex] to find velocity in terms of mass [tex]m[/tex] and momentum [tex]p[/tex]:

[tex]\begin{aligned} v &= \frac{p}{m} \\ &= \frac{-22.11\; {\rm kg \cdot m \cdot s^{-1}}}{67\; {\rm kg}} \\ &\approx (-4.9)\; {\rm m \cdot s^{-1}}\end{aligned}[/tex].

In other words, the velocity of the boat would be approximate [tex]4.9\; {\rm m\cdot s^{-1}}[/tex] backwards.

The moment of inertia of the propeller will be "0.3058 k.gm²"

Given.

Angle of rotation, = 124 rad/s

Work completed, W = 2351.3 J

The Work-Energy Principle is used as,

Kinetic energy Equals Net work done; (W) = (K.E)

We are aware,

→ K.E = × l × ω²

then,

→ W = × l × ω²

By exchanging the values, we obtain

2351.3 = × l × (124)²

thus, The moment of inertia,

I = 2351.3 × 2/[tex]124^{2}[/tex]

= 0.3058 k.gm²

The moment of inertia of the propeller will be "0.3058 k.gm²"

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Therefore, the calculated volume is 1000 cm³

The density of a place refers to the quantity of things—which may include people, animals, plants, or objects—there are in it. Divide the number of objects by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometers or miles. For instance, a block of the harder, lighter element gold (Au) will be denser than a block of the heavier element lead (Pb).

Volume of fish tank = mass/ density

mass=1.0 kg=1000 g

density=1.0 g/cm³

volume=1000 cm³

Therefore, the calculated volume is 1000 cm³

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Answer:

D 100kg

Explanation:

[tex]1n = 10kg \\ 10n = g \\ g = 10n \times 10kg \\ = 100kg[/tex]

If the wye connected phase to neutral voltage is 277vrms, the phase to phase voltage is 480 VRM S.

The number of water molecules in the hot tub is 1.47×10²⁷ molecules

The following data were obtained from the question:

The number of water molecules in the hot tub can be obtained as follow

Number of molecules = Mass of water / mass of one molcule

Number of molecules = 4.38×10³ / 2.98×10⁻²⁴

Number of molecules = 1.47×10²⁷ molecules

Thus, number of molecules in the hot tub 1.47×10²⁷ molecules

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Answer:

Small Devices

Explanation:

firefighters wear small electronic devices that transmit to a location at a command system.

Unlike the consecutive numeric storage method, which uses each digit as an indexing unit, the terminal-digit numeric storage method divides a number into three groups of digits.

What does terminal-digit numeric storage mean?

The fundamental numeric method might not be practical, so a different option is to use terminal-digit filing, which separates a number into three groups of digits. The goal is to denote primary (first), secondary, and tertiary (final) groupings of numbers.  These primary, secondary, and tertiary numbers tell the location of the record.

What does consecutive numeric storage mean?

Each digit serves as an indexing unit in the consecutive storage method, also known as serial or straight number filing. To determine  filing order, a number's first digits are compared. Following a comparison of the first two digits, the third digits are evaluated, and so on. The numbers used may be written on the record or may be a component of the record itself, such as a number on an invoice. As each new record is added to the system, the number assigned to it increases.

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You need to do the necessary calculations and check how they can be ranked.

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The calculated pressure is 55 KPa.

The amount of force delivered perpendicularly to an object's surface in relation to its area is known as pressure. Its abbreviation is "p" or "P." An isochoric process in thermodynamics is a thermodynamic process in which the volume of the closed system experiencing the process remains constant. It is also known as a constant-volume process, isovolumetric process, or isometric process.

At the triple point of water, a constant volume gas thermometer registers a pressure of P tr = 40 kPa= 40 *10³ Pa.

Water's boiling point is T=100°C=373.16K.

Let P represent the pressure at the water's boiling point.

The temperature pressure relation for a constant volume gas thermometer is provided below:

T= P/ Ptr *273.16K

P= 273.16 TP tr

= 273.16 /373.16*40*10³

=54620Pa

=5.42*10³ Pa ≅ 55 KPa

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The balance of star's equilibrium is essentially brought about by two forces. These forces are the star's inner gravitational pull and the thermal energy produced by fusion processes' outward pressure push. These two forces prevent a star's collapse and constantly maintain a star in equilibrium.

A star's equilibrium with respect to gravity is governed by two forces. These two forces are distinguished as the star's gravity and its outward pressure push, respectively. It is a self-regulating and stable process that keeps the stars in this equilibrium.

star's equilibrium is the term used to describe this state of the stars. The fusion events occurring in a star's core produce an outward pressure force.

From the high-pressure core to the low-pressure surface, which is balanced by inward gravity, is the direction of pressure force in stars.

A star will experience a rise in internal gravity if we add more matter to it, which is again counterbalanced by internal pressure to maintain the star stable.

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In the electromagnetic spectrum, the type of radiation that has less energy than visible light is microwave.

The electromagnetic spectrum is the arrangement of all types of electromagnetic radiation in order of decreasing frequencies and increasing wavelength. In the electromagnetic spectrum, the frequencies of the electromagnetic radiation can range from as low as 1 hertz to as high as 100 million hertz.

Frequency is directly proportional to energy. In other words, the more frequency an electromagnetic wave has, the more energy it will also have. The electromagnetic wave with the highest frequency and energy is gamma ray. Visible light falls somewhere in the middle of the spectrum, and the frequency of microwaves is less than that of visible light. Hence, microwaves have less energy than visible light.

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The ball that is thrown upward with an initial velocity of 16 m/s will reach the high point in its flight in a time of: 1.6 s

The formula for the vertical launch upward and the procedure we will use is:

t max = v₀/ g

Where:

Information about the problem:

Applying the maximum time formula we get::

t max = v₀ / g

t max =(16 m/s)/(10 m/s²)

t max = 1.6 s

In physics vertical launch upwards is the motion described by an object that has been launched vertically upwards in which the height and the effect of the earth's gravitational force on the launched object are taken into account.

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Air in a thunderstorm is being heated to temperatures higher than those of the surrounding air by the process of condensation, and because of this, the air is unstable.

A thunderstorm is a small-scale storm that includes both thunder and lighting. Additionally, it frequently delivers heavy rain as well as violent gusts. Some thunderstorms have a chance of producing hail and/or tornadoes. Localized heavy snow showers during the winter may also include thunder and lightning.

In every region of the country and at any time of the year, severe thunderstorms pose a variety of risks to people's lives and property, including flooding, lightning-induced wildfires, tornadoes, wind, and hail. Warm, wet air rises into cold air, creating thunderstorms. Condensation occurs when the warm air cools, which causes water vapor to condense into tiny water droplets. Lower in the atmosphere, the cooled air rises once more after warming.

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Answer:

In rectilinear motion F = M a describes the motion of a particle

Γ = I α      (torque equals moment of inertia times angular acceleration is the equivalent law in circular motion)

A fixed central force is perpendicular to the direction of motion and cannot change the torque about the point. (for mechanical forces)

However, for electrical forces, F = Q V X B and a changing magnetic field at the center of motion can produce a force perpendicular to the direction of motion.

Perhaps, the question needs to be more specific.

I would chose block-level replication use for only file changes instead of entire file changes. Instead of duplicating the whole system configuration, block storage replication is a type of disaster recovery at the individual volume level.

Depending on your environment, you can set replication of each volume across local and remote computers to go either way and in synchronous or asynchronous modes.

However, block storage replication only duplicates data at the level of a specific volume, not the complete system environment. This strategy has a number of benefits.

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The uncertainty in the density is 1.71 g/cm^3 (±0.03)

The density of a body is the ratio of the mass to the volume of the copper sphere. We have been given the mass of the copper sphere and its volume thus we can now find the density of the sphere.

Mass = 112.25 g

Volume = 4/3 π r^3 =  4/3 * 3.142 * (2.50)^3 = 65.5cm^3

Density = 112.25 g/65.5cm^3 = 1.71 g/cm^3

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With the concept of Probability the chance of getting exactly 2 defective bulbs is 0.311

Probability is the branch of mathematics which deals with the determination of the chance or likeliness of an event to occur. Probability may be defined as the ratio of favorable outcomes to the total number of outcomes in an event, mathematically,

[tex]Probability( X)=\frac{F}{T}[/tex]

where,

[tex]F[/tex] = favorable outcomes for a random event X.

[tex]T[/tex] =  total outcomes for a random event X.

X = Random event.

Here in the question, there are 24 light bulbs out of which 3 are defective. A person picks 10 bulbs at random, in which we have to find the probability that he selects exactly 2 light bulbs.

So, here the event is X = exactly 2 bulbs are defective out of 10 bulbs.

Now, using Combination, the total number of outcomes possible are,

T = ²⁴[tex]C[/tex]₁₀

The total number of favorable outcomes are,

F = ³[tex]C[/tex]₂ײ¹[tex]C[/tex]₈

The probability of the event X will be,

P(X) =³[tex]C[/tex]₂ײ¹[tex]C[/tex] / ²⁴[tex]C[/tex]₁₀

P(X) = 0.311

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100 N is the force that is needed to produce the stress.

Stress in physics is the force exerted on a material’s unit area. Strain is the term for a body’s reaction to stress.

The body can distort under stress. Stress units can be used to quantify the amount of force that a material has experienced.

Stress is equal to (elastic modulus – strain).

Compressional stress is frequently observed in geological settings along convergent borders where tectonic plates contact. This compressional stress is caused by the weight of the rock pressing down on the rock beneath it.

The overall force applied per unit area is referred to as stress. Pressure and stress are the same in terms of units (Newtons per meter).

Stress = Force / Area

Force = stress × Area

          = 1mpa × 1× [tex]10^{-4}[/tex]

          = 100N

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Answer: 45 meters

Explanation:

3 m/s ==> 3 meters/second

15 seconds * 3 meters/second=

15*3/1=

15*3=45 meters

A circuit element that hinders the flow of current is called a resistor.

Nearly all electronic circuit boards use resistors, which are passive parts. The name "resistor" comes from the resistor's function of exhibiting resistance to current flow.

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Answer:

20 m/s

Explanation:

the final velocity of the car = 20 m/s

Change in the velocity = final velocity - initial velocity

Change in the velocity= 20 - 0

= 20 m/s

Thus, the change in the velocity would be 20 m/s.