A hunter aims directly at a target (on the same level) 75m away. If the bullet leaves the gun at a speed of 180m/s, by what displacement will it miss the target (vertically)? Round to two decimal places and include units.

Energy is defined as the ability to do work. Intensity is the amount of energy that flows through a unit of area perpendicular to the direction of flow per unit time. It is a measure of the strength of the energy waves. The surface of a material can receive energy at a certain rate.

Given: Energy received per second = 233 W/sq.cm

Let’s find the energy received per sq.ft.:

Energy received per second per sq.cm can be converted into energy received per second per sq.ft. by using the following conversion factor:

1 sq.ft. = 30.48 cm

Therefore, (1 sq.ft.)/(30.48 cm\()^2\) = 0.0929 sq.ft./sq.cm

∴ Energy received per second per sq.ft. = (233 W/sq.cm) × (0.0929 sq.ft./sq.cm) = 21.6 W/sq.ft.

We have to find the intensity in (ft. lb/sec)/sq.ft. To calculate the intensity in (ft.lb/sec)/sq.ft, we use the formula: 1 watt = 1 Nm/s 1 ft.lb/sec = 1.356 W

∴ Intensity = Energy received per second / Area

Energy received per second = 21.6 W/sq.ft.

Area = 1 sq.ft.

Intensity = 21.6 W/sq.ft. = (21.6 Nm/s)/ (0.0929 × 1.356 sq.ft.)= 156.7 (ft. lb/sec)/sq.ft.

Energy is defined as the ability to do work. Intensity is the amount of energy that flows through a unit of area perpendicular to the direction of flow per unit time. It is a measure of the strength of the energy waves. The surface of a material can receive energy at a certain rate. In this problem, the energy received per second is 233 watts per square cm. But, we need to find the intensity in (ft.lb/sec)/sq.ft.

We can find the energy received per sq.ft. by using a conversion factor (1 sq.ft.)/(30.48 cm\()^2\) = 0.0929 sq.ft./sq.cm, and multiplying it by the energy received per second per sq.cm (233 W/sq.cm). The result is 21.6 W/sq.ft. To calculate the intensity in (ft.lb/sec)/sq.ft, we use the formula: Intensity = Energy received per second / Area. The area is given as 1 sq.ft. After substituting the values, we get the intensity as 156.7 (ft.lb/sec)/sq.ft.

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The torque required to hold the spinning tire stationary against the ground is 31.4 Nm, and the force of friction acting on the tire is 245.8 N.

When the tire is held against the ground, the force of gravity acting on the tire creates a normal force, which in turn creates a force of static friction opposing the tire's motion. The maximum force of static friction is given by the product of the coefficient of static friction and the normal force, which is equal to the weight of the tire.

Since the tire is not translating forward, the force of friction must be equal in magnitude and opposite in direction to the torque created by the spinning of the tire. Using the relationship between torque, force, and radius for a hoop, the torque required to hold the spinning tire stationary can be calculated.

Once the tire is held stationary, the force of kinetic friction replaces the force of static friction, and the force can be calculated using the coefficient of kinetic friction and the normal force.

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Answer:

Where are the measurements?

Explanation:

We can measure the length of the swimming pool by using the SI unit meter, as the length of the swimming pool comes under the fundamental measurement of the dimension which is measured by the standardized international unit of length.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

There are three additional units and 7 SI basic units in this system of SI units, the base SI units are meter, kilogram, second, kelvin, ampere, candela, and mole.

As given in the problem we have to find how can we measure the length of the swimming pool,

Due to the fact that the length of the swimming pool falls under the category of a dimension that is fundamentally measured using a standardized international unit of length.

Thus, we can measure the length of the swimming pool by using the SI unit meter,

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Your question seems incomplete the complete question is,

Which SI units would you use for the following measurements?

the length of a swimming pool

Answer:

The fundamental frequency is "190.52 Hz".

Explanation:

The given question is incomplete, please find attachment of the complete problem.

The given values are:

Frequency,

f = 146.8 Hz

Length of D-string,

L = 0.61

As we know,

⇒ \(f = \frac{v}{2L}\)

On putting the given values, we get

⇒ \(146.8 = \frac{v}{(2\times 0.61)}\)

⇒       \(v=146.8\times 1.22\)

⇒       \(v=179 \ m/s\)

So,

The new length will be:

⇒  \(f = \frac{179}{(2\times 0.47)}\)

⇒     \(=\frac{179}{0.94}\)

⇒     \(=190.52 \ Hz\)

The fundamental frequency, in hertz, of the new tone that is produced when the string is plucked is 168.84 Hz

Let assume that the oscillating length on the guitar is 0.62 m,

If the guitarist shortens the oscillating length of the properly tuned D-string by 0.15 m.

Then the new length of the oscillating string L' = (0.62 - 0.15 )m = 0.47 m

The fundamental frequency of the new tone can be computed by using the formula:

\(\mathbf{f = \dfrac{1}{2L'} \sqrt{\dfrac{T}{m/L}}}\)

where;

T  = 4× 0.62× 147 × 1.5× 10⁻³  (assuming old fundamental frequency = 147)

T  = 4× 0.62× 147 × 1.5× 10⁻³

T = 80.39 N

∴

\(\mathbf{f = \dfrac{1}{2 \times 0.47} \sqrt{\dfrac{80.39}{1.5 \times 10^{-3}/0.47}}}\)

f = 168.84 Hz

Therefore, the fundamental frequency, in hertz, of the new tone that is produced when the string is plucked is 168.84 Hz

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Dead space is the name of the air in the conducting zone that is not available for gas exchange.

What is conducting zone?

The conducting zone consists of all of the structures that provide passageways for air to travel into and out of the lungs.

The volume of air that is inhaled that does not take part in the gas exchange is dead space. Because it either remains in the conducting airways or reaches alveoli that are not perfused or poorly perfused.

Dead space volume is air in the conducting airways that does not participate in gas exchange between the alveoli and blood.

Hence,

Dead space is the name of the air in the conducting zone that is not available for gas exchange.

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Given data

*The given mass of the cart is m = 32.0 kg

*The given acceleration of the cart is

The formula for the magnitude of the net force acting on the object is given as

Substitute the known values in the above expression as

Thus, the magnitude of the net force acting on the cart is 160.0 N and the correct option is (B)

Answer:  the magnitude of the magnetic field perpendicular to the wire is approximately 1.93 x 10^-3 T.

Explanation:

The magnetic force on a straight wire carrying current is given by the formula:

F = B * I * L * sin(theta),

where F is the magnetic force, B is the magnetic field, I is the current, L is the length of the wire, and theta is the angle between the magnetic field and the wire (which is 90 degrees in this case since the field is perpendicular to the wire).

Given:

Length of the wire (L) = 0.30 m

Current (I) = 15.0 A

Magnetic force (F) = 2.6 x 10^-3 N

Theta (angle) = 90 degrees

We can rearrange the formula to solve for the magnetic field (B):

B = F / (I * L * sin(theta))

Plugging in the given values:

B = (2.6 x 10^-3 N) / (15.0 A * 0.30 m * sin(90 degrees))

Since sin(90 degrees) equals 1:

B = (2.6 x 10^-3 N) / (15.0 A * 0.30 m * 1)

B = 2.6 x 10^-3 N / (4.5 A * 0.30 m)

B = 2.6 x 10^-3 N / 1.35 A*m

B ≈ 1.93 x 10^-3 T (Tesla)

Astronomers can now report that active star formation was going on at a time when the universe was only 20% as old as it is today. when astronomers make such a statement, they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find.

SO option B is correct.

An astronomer is described as a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth by observing astronomical objects such as stars, planets, moons, comets and galaxies – in either observational or theoretical astronomy.

Astronomers are known to use redshifts to measure how the universe is expanding, and thus to determine the distance to our universe's most distant and therefore oldest objects.

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To find

To divide 20 miles by 5 hours, what conversion should be made to make the calculation correct?

Explanation

20 miles refer to the distance travelled

5 hours refers to the time taken

So dividing distance by time would give us speed

Since both are different physicals quantity so their units need not be same.

Conclusion

The correct statement is

Divide the two numbers as given--units do not have to be the same when dividing.

Answer:

The data that we have is:

Initial height = 2m

Initial vertical speed: As the sister is only pushed, we can assume that we do not have initial speed in the vertical axis.

Then at the beginning, we only have potential energy, that (using the water as the zero in our axis) can be written as:

U = m*g*h

where m is the mass of your sister, g is the gravitational acceleration, and h is the initial height:

h = 2m

g = 9.8m/s^2

Now, when your sister is about to touch the water, all the potential energy has be transformed into kinetic energy:

K = (m/2)*v^2

Then we have, at that moment:

K = U

(m/2)*v^2 = m*g*h

We want to solve this for v, that is the velocity.

v = √(2*g*h) = √(2*9.8m/s^2*2m) = 6.26 m/s

So the speed at which your sister hits the water is 6.26 m/s

Answer:

the ground when the ball hits it

Explanation:

A ball falls freely towards the Earth. If the action force is the Earth pulling down on the ball, then identify which of the following best describe the reaction force:

Answer:

75 Nm

Explanation:

Answer: hmm

Explanation:

hmmm

Friction and the applied force are not balanced. The 7 N push is countered by the frictional force of 3 N to push the box with a net force of 4 N.

Answer: water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid

Explanation: I took the test

The two components of an internal force system are: • Normal force and

• Shear force

Normal force refers to the force that acts perpendicular to the surface of an object or a structural element. It is responsible for counteracting external loads and providing support.

Shear force, on the other hand, acts parallel to the surface of an object or a structural element. It is responsible for causing a deformation or shear stress within the material.

Bending moment, although an important factor in structural analysis, is not one of the two components of an internal force system. Bending moment refers to the internal force that causes a structural element to bend or undergo a moment about an axis.

Therefore, the correct answer is: Normal force, shear force.

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The form of energy stored in a stretched spring is elastic potential energy. When a spring is stretched or compressed, it possesses potential energy due to the deformation of its structure.

This potential energy is called elastic potential energy because it is associated with the elasticity of the spring.

As the spring is stretched, work is done to overcome the forces within the spring that resist the change in its length. This work is converted into potential energy, which is stored in the spring. The amount of potential energy stored in the spring is directly proportional to the amount by which it is stretched or compressed.

When two forces are simultaneously applied to a spring in opposite directions, it may result in elongation or contraction of the spring, depending on the magnitude and direction of the forces. If the applied forces are strong enough to overcome the spring's elasticity, the spring will undergo deformation and exhibit elongation or contraction. This deformation is a manifestation of the stored elastic potential energy being converted into mechanical energy.

Shear, bending, and intermolecular binding energy are not directly related to the stretching of a spring.

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Explanation:

hmm by the increasing the size of wheel and decreasing axle

So, to observe the red traffic light as yellow, the observer must approach the light with a speed of 0.148 times the speed of light.

When the observer approaches the red traffic light with a speed, the light appears shifted towards the blue end of the spectrum. The apparent frequency and wavelength shift is calculated using the Doppler effect equation.

The Doppler shift is given by the relation f′= f (v+vO)/c

where, f' is the observed frequency, f is the frequency of the wave, v is the speed of the observer, v O is the speed of the source and c is the speed of the wave.

For the red traffic light,

f= c/λ = 4.44 × 10^14 Hzλ

= 675 nm

For the yellow traffic light,

f = c/λ

= 5.22 × 10^14 Hzλ

= 575 nm

As we know that the light appears yellow when the red light shifts 575 nm.

Therefore, the observer should be approaching the light with a speed given by the relation as,

∆f/f = v/c⇒ ∆λ/λ

= v/c⇒ v

= c (∆λ/λ)

= c [(λ_0 - λ)/λ_0 ]

Where,λ is the wavelength of the shifted light (λ = 575 nm),λ0 is the wavelength of the unshifted light (λ0 = 675 nm)

Therefore,

v = c [(675 - 575)/675]⇒ v

= 0.148c

So, the observer must approach the red traffic light at a speed of 0.148 times the speed of light to observe it as yellow.

An observer, when approaching a red traffic light, experiences a shift in the light's wavelength towards the blue end of the spectrum. This apparent frequency and wavelength shift is given by the Doppler effect equation.

The Doppler shift can be expressed using the relation,

f′= f (v+vO)/c

where, f' is the observed frequency, f is the frequency of the wave, v is the speed of the observer,v O is the speed of the source and c is the speed of the wave.

The frequency and wavelength of the red and yellow traffic lights are,

f= c/λ

= 4.44 × 10^14 Hz,

λ = 675 nm and

f = c/λ

= 5.22 × 10^14 Hz,

λ = 575 nm.

Since we know that the light appears yellow when the red light shifts by 575 nm, the observer must be approaching the light with a velocity given by the following relation:

∆f/f = v/c⇒ ∆λ/λ

= v/c⇒ v

= c (∆λ/λ_0 ) where λ_0 is the wavelength of the unshifted light (λ_0 = 675 nm)

Therefore,

v = c [(675 - 575)/675]⇒ v

= 0.148c

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Answer:

C.Plane mirror this is the answer of this question.

None of the above. That is option D.

A spherical mirror is defined as a mirror that has a surface that reflects curved rays. It is also called a curved mirror.

Types of spherical mirror include:

Example of concave mirror are Torch lights and automobile headlights.

Example of convex mirror is the magnifying glasses and telescopes.

Therefore, concave, convex and plane mirrors are all examples of a spherical mirror.

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The car tyre contains air initially at a pressure of 195 kPa after travelling several km the temperature of the air inside a car tyre rises from 30 to 70°C if the tyre is rigid and does not expand then the new pressure inside the tyre would be 220.74 kPa.

The total applied force per unit of area is known as the pressure.

The pressure depends both on externally applied force as well the area on which it is applied.

The mathematical expression for the pressure

Pressure = Force /Area

the pressure is expressed by the unit pascal or N /m²

By using the Charles law for gases which states that the volume of the gas remains constant then the pressure of the gas is directly proportional to the temperature.

As given in the problem the tyre is rigid and does not expand this means the volume of the tyre remains constant.

The mathematical expression for Charles's law is as follows

P₁/P₂ = T₁/T₂

First, we have to change the temperature from degree Celcius to the kelvin temperature scale

K = 273 + C

where k is the temperature in kelvin and the C is degrees of Celcius

Initially, the temperature was 30° C

T₁ = 273 + 30

T₁ = 303 K

Then after travelling the temperature of the air inside a car tyre rises from 30 to 70°C

T₂= 273+ 70

T₂ =343 K

The car tyre contains air initially at a pressure of 195 KPa

P₁ = 195 kPa

Lets us take the final pressure of the air would be P₂

By substituting the values in the formula

P₁/P₂ = T₁/T₂

195/P₂ = 303/343

P₂ = 220.74 kPa

Thus, the new pressure inside the tyre would be  220.74 kPa.

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Streamflow is the flow of water in streams, rivers, and other channels, and is a key component of the water cycle. It's influenced by a variety of factors, including the shape and depth of the riverbed, the gradient of the stream, the size and shape of the channel, and the amount of water flowing through it. The given statement is false.It is affected by many factors.

All of these factors influence the velocity of the streamflow. Riverbed and streamflow relationshipThe velocity of streamflow is primarily influenced by the gradient or slope of the riverbed. A shallow slope will not yield high velocity streamflow, but instead will create a slow-moving, meandering stream with a high potential for sedimentation and erosion. In contrast, a steep gradient will create a fast-moving stream with a higher velocity and more turbulent water. As a result, a steeper slope will produce higher velocity streamflow than a shallower slope, which will produce slower-moving streamflow. Therefore, a riverbed with a shallow slope will not yield high velocity streamflow. The statement is false.

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Answer:

\(\beta=B=8.05\mu T\)

Explanation:

The density of the magnetic flux is given by the following formula:

\(\beta=\frac{\Phi_B}{A}=\frac{ABcos\theta}{A}=Bcos\theta\)

The normal vector A and the vector of the magnitude of the magnetic field are perpendicular, then, the angle is zero:

The magnitude of the magnetic field is calculated by using the formula for B at a distance of x to a point in the plane of the loop:

\(B=\frac{\mu_oIR^2}{2(x^2+R^2)^{3/2}}\)

For x = 0 you have:

\(B=\frac{\mu_oIR^2}{2R^3}=\frac{\mu_oI}{2R}\)

R is the radius of the circular loop and its values is:

\(R=\sqrt{\frac{A}{\pi}}=\sqrt{\frac{0.5m^2}{\pi}}=0.39m\)

Then, you replace in the equation for B with mu_o = 4\pi*10^-7 T/A:

\(B=\frac{(4\pi*10^{-7}T/A)(5A)}{2(0.39m)}=8.05*10^{-6}T=8.05\mu T\)

and the density of the magnetic flux is

\(\beta=B=8.05\mu T\)

Answer:

B.) Kinetic energy.

Explanation:

A better answer would be mechanical energy, but they do not have that up there.

An electric motor converts electrical energy into kinetic energy. The rotational kinetic energy of the motor is its mechanical energy to work.

Energy can neither be created nor be destroyed. However, it can be transformed from one form to the other. Hence, the total energy of a system is conserved.

The energy lost in one form is equal to the energy gained in another form. We are using many electrical devices all are working under the process of energy transformation.

In an electric motor, the electrical energy is converted to the rotational kinetic energy of the motor. It is used for mechanical work of the motor. The rotational kinetic energy make the motor rotating. Hence, option B is correct.

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An electric dipole would experience a torque when it is placed in a non-uniform electric field. The torque is caused by the electric field exerting forces on the positive and negative charges of the dipole in opposite directions.

This creates a net force that tends to rotate the dipole.An electric dipole consists of two equal and opposite charges of magnitude q separated by a distance d. When an electric dipole is placed in an electric field, it can experience a torque under certain conditions.The dipole will experience a torque when the electric field is not uniform, meaning the field strength or direction varies across the dipole's length. The torque arises due to the interaction of the electric field with the electric dipole moment.

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Answer:

NOAA Scienctist

Explanation:

The stakeholder who expressed concern over the removal of the Bloede dam was the NOAA Scientist. So, option C.

A stakeholder is a person, group, or organization that has a vested interest in the choices made and the actions taken by a company, organization, or business initiative.

Here,

Stakeholders are important because, there wouldn't be any projects without them. The project can gain a lot from including its stakeholders.

They can participate in the decision-making process and have an impact on the organization's actions in a way that benefits the project management team.

The dismantling of Bloede Dam was long overdue given the environmental and safety concerns.

The difficulties caused by Bloede Dam are not unusual. Our nation's dams are increasingly hazardous to the environment and dangerous to people, with more than 90,000 dams blocking rivers around the country, including at least 659 in Maryland alone.

Hence,

The stakeholder who expressed concern over the removal of the Bloede dam was the NOAA Scientist. So, option C.

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