a sleeping 68 kg man has a metabolic power of 73 w. how many calories does he burn during an 8.0 hour sleep?

Answer:

Explanation:

The initial vertical velocity is 540sin55° = 442.342103... 442 m/s

The initial horizontal velocity is 540cos55° = 309.731275... 310 m/s

In the real world, both initial velocities would be reduced by air resistance and vertical velocity will be altered by gravity.

The name of the acceleration that leads to uniform circular motion is called centripetal acceleration.

In uniform circular motion, an object moves in a circular path at a constant speed. Although the object's speed remains constant, its velocity is constantly changing due to the continuous change in direction, this change in velocity over time results in acceleration. Centripetal acceleration is always directed towards the center of the circular path, and its magnitude depends on the object's speed and the radius of the circular path.

The formula for calculating centripetal acceleration is a_c = v^2 / r, where 'a_c' represents centripetal acceleration, 'v' is the object's speed, and 'r' is the radius of the circular path. This type of acceleration is essential for maintaining uniform circular motion, as it keeps the object moving in a circular path by constantly changing its direction. In summary, centripetal acceleration is the key factor that leads to uniform circular motion. It is responsible for constantly changing the direction of the object's velocity, ensuring that it continues to move along the circular path with a constant speed.

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Answer: A Graduated Cylinder or A Beaker ?

Explanation:

Let's solve the problem using Coulomb's law and the given information.

Given:

Q = Q1 + Q2 = 95.0 μC

F = 10.0 N (repulsive force)

r = 32.0 cm = 0.32 m

a) To find the charge Q1, we know that Q1 < Q2, so we can express Q1 in terms of Q and Q2:

Q1 = Q - Q2

We can use Coulomb's law to write the equation for the force between the spheres:

F = k * |Q1 * Q2| / r^2

Substituting the values into the equation:

10.0 N = (8.99 x 10^9 N m^2/C^2) * |(Q - Q2) * Q2| / (0.32 m)^2

b) Similarly, to find the charge Q2, we can use the equation:

Q2 = Q - Q1

Substituting the values into the equation:

10.0 N = (8.99 x 10^9 N m^2/C^2) * |Q1 * (Q - Q1)| / (0.32 m)^2

c) If the force was attractive, we would have opposite signs for Q1 and Q2. Therefore, Q1 = -(Q - Q2).

d) Similarly, if the force was attractive, we would have opposite signs for Q1 and Q2. Therefore, Q2 = -(Q - Q1).

To find the specific values of Q1 and Q2, we need to solve the above equations. However, the equations involve a quadratic term due to the absolute value. Solving these equations analytically can be complex. Instead, we can use numerical methods or approximation techniques to estimate the values.

It is also important to note that for the given values of Q and F, the force being repulsive indicates that Q1 and Q2 have the same sign, as mentioned in the problem statement.

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The displacement from Rhonda's car to her campsite 257 m, 34.4° north of west.

Most campgrounds have picnic tables, a place to park your car, and a place to pitch your tent. Bathrooms and taps are often shared. One of the joys of camping is the lack of outdoor gear. But it's also nice to have a comfortable, convenient and cozy campsite. A tent is a small shelter for sleeping while camping.

Camps are areas with tents campfires and surroundings. There are many types of camping but the main methods of camping are backpacking auto-camping and glamping. These top three camping styles have options for every level of camper. Front country camping is also called auto camping because you can drive to the campground. These campsites usually have running water and modern washrooms.

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yes the answer is force

Explanation:

Force is a push or pull which can change the state of body whether it is rest or in motion or tries to change the state of body.

Answer:

 V = 2.52 10³ V

Explanation:

The electric potential for a point charge is

       V = k ∑ \(\frac{q_i}{r_i}\)

In this case the formula is

       V = k (\(\frac{q_1}{r_1} + \frac{q_2}{r_2}\))

distances are the absolute value

       r₁ =√ (7.1 -0)² = 7.1 m

       r₁ =√ (7.1 - 14.3)² = 7.2 m

we substitute

       V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)

we have two possibilities

* different charges

         V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)

* equal charges and same sign

          q₁ = q₂ = q

         V = 9 10⁹ q (1 / 7.1 + 1 / 7.2) = p 9 10⁹   0.2797

         V = 2.52 10⁹ q

if we assume a value of the charge, for example q = 1 10⁻⁶ c

           V = 2.52 10⁹ 1 10⁻⁶

            V = 2.52 10³ V

Answer:

42.11 years old

Explanation:

Given that:

In 2000, a 20-year-old astronaut left Earth to explore the galaxy; her spaceship travels at 2.5 x 10^8 m/s. She returns in 2040

To find her age we use:

\(\Delta t_m=\frac{\Delta t_s}{\sqrt{1-\frac{v^2}{c^2} } }\\\)

Δtm is  time interval for the observer stationary relative to the sequence of

events = 2040 - 2000 = 40 years

Δts is is the time interval for an observer moving with a speed v relative to the  sequence of event

v = velocity = 2.5 x 10^8 m/s

c = speed of light = 3 x 10^8 m/s

\(\Delta t_s=\Delta t_m}{\sqrt{1-\frac{v^2}{c^2} } }\\\Delta t_s=40\sqrt{1-\frac{(2.5*10^8)^2}{(3*10^8)^2}}\\\Delta t_s=22.11\ yr\)

Here age in 2000 is 20 year, therefore when she appear she would be 20 year + 22.11 year = 42.11 years old

The correct answer is "the speed of light is different in the two media." Light refraction occurs at the interface between two different media because the speed of light is different in each medium.

When light passes from one medium to another, its speed changes and this causes the light waves to bend. This bending is known as refraction. Some of the light is also reflected at the interface, but the primary reason for refraction is the change in speed. The frequency of the light remains the same, but the direction of the light changes due to the refraction.

 Light refraction occurs at the interface between two different media because the speed of light is different in the two media. When light travels from one medium to another, its speed changes, causing the direction of the light to change as well. This bending of light is known as refraction.

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Answer:

Explanation:

A plane mirror will produce a virtual image of a real object. But it is correct that a plane mirror will also produce a real image of a virtual object.A virtual image An image in a mirror is a virtual object, which can in turn be used to create another image. This can occur when you have more than one optical element in the optical system. Then the object of one component becomes the image of the next optical component.

So the answer is Yes it will!!!!

Answer:

I think u know the answer of this question

Answer:

The value is \(m_2 = 2.46 \ kg\)

Explanation:

From the question we are told that

    The volume of the tank  is  \(V = 0.57 \ m^3\)

    The mass of the Argon it contains is  \(m = 4 \ kg\)

     The initial pressure on of the gas is  \(P_1 = 450 kPa = 450 *10^{3} \ Pa\)

     The initial  temperature is  \(T_1 = 30^oC = 30 + 273 = 303 \ K\)

     The  new pressure inside the tank is  \(P_2 = 200 \ kPa = 200 *10^{3} \ Pa\)

Gnerally given that the  Argon remaining inside the tank has undergone a reversible, adiabatic process, then the final temperature of the Argon gas is mathematically represented as

      \(T_2 = T_1 * [\frac{P_2}{P_1} ]^{ \frac{(k - 1 )}{k} }\)

Here k is the specific heat ratio of Argon with value \(k = 1.667\)

So

         \(T_2 = 303 * [\frac{200}{450} ]^{ \frac{(1.667- 1 )}{1.667} }\)

=>      \(T_2 = 219 \ K\)

Generally from the ideal gas equation

        \(PV = mRT_2\)

 So

      \(\frac{P_1V}{P_2V} =\frac{ m_1 * R * T_1 }{ m_2 * R * T_2}\)

Here R is the gas constant with value  \(R = 8.314 \J \ K^{-1}\ mol^{-1}\)

=>    \(m_2 = \frac{P_2 * T_1 }{ P_1 * T_2 } * m_1\)

=>    \(m_2 = \frac{200 * 303 }{ 450 * 219 } * 4\)

=>    \(m_2 = 2.46 \ kg\)

Answer:

a)It is NOT possible using this telescope, to see the two stars as separate stars

b)\(d_{min} =28.466m\)

Explanation:

From the question we are told that:  

Diameter of lens,\(d = 25 cm \approx 0.25 m\)

Distance from both star \(D_f= 2*10^{17} m\)

Distance between both stars \(D_b= 6*10^9 m\)

Wavelength of light \(\lambda =700 nm \approx 700*10^-9 m\)

Generally the equation for angle subtended by the two stars at the lens  is mathematically given by

 \(\theta=\frac{D_f}{D_b}\)

 \(\theta=\frac{6*10^9}{2*10^{17}}\)

 \(\theta=3.0*10^{-8} rad\)

Generally the equation for minimum angular separation of two object is mathematically given by

\(\theta_{min} = 1.22*\lambda/d\)  

\(\theta_{min}= \frac{1.22*700*10^-9}{0.25}\)  

\(\theta_{min}= 3.416*10^-^6 rad\)

Therefore

 \(\theta < \theta_{min}\)

\(3.0*10^{-8} rad< 3.416*10^-^6 rad\)

It is NOT possible using this telescope, to see the two stars as separate stars

b)

Generally the equation for minimum diameter of the lens is mathematically given by

  \(d_{min} =\frac{ 1.22*\lambda}{\theta}\)

  \(d_{min} =\frac{ 1.22*700*10^{-9}}{3*10^{-8}}\)

  \(d_{min} =28.466m\)

Answer:

Explanation:

Since the block is at rest in an elevated position, we can assume that it only has potential energy.

U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.

Plug in known variables....

U=4kg*9.8m/s^2*20m

U=784 joules of potential energy or letter A.

Answer:

B

Explanation:

A body has kinetic energy that is moving

If the fringe spacing is 80 cm, the distance between the aerials  is 6.25 meter.

In physics, interference refers to the combined result of two or more wave trains travelling along intersecting or converging trajectories. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves.

Given: wavelength  = 50 mm = 50 × 10⁻⁴  m

the fringe spacing is = 80 cm = 0.80 m.

x = λD/d

d =  λD/x

= 50 × 10⁻⁴ × 1000/0.80 m

= 6.25 meter.

Hence,  the distance between the aerials  is 6.25 meter.

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Answer:

A: 15 m/s

B: 900 Meters

Explanation:

A. Average speed is equal to final velocity plus initial velocity divided by two

Va= (20+10)/2 = 15 m/s

B.

distance = speed × time

D= 15 m/s * 60s = 900 Meters

Answer:

Answer is in the attachment.

Explanation:

Hope this helps.

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The building is approximate - 29.4 meters tall. The negative sign indicates that the brick is below the starting point, so the height of the building is 29.4 meters.

To determine the height of the building, we need to calculate the vertical displacement of the brick. First, let's break down the initial velocity of the brick into its vertical and horizontal components. The initial speed of 35 m/s can be split into two parts: the vertical component and the horizontal component. Since the angle is 45 degrees, both components will have the same value.

Using trigonometry, we can calculate the vertical component of the initial velocity. The vertical component can be found by multiplying the initial speed (35 m/s) by the sine of the angle (45 degrees).
Vertical component = initial speed * sin(angle)
Vertical component = 35 m/s * sin(45 degrees)
Vertical component = 35 m/s * 0.707
Vertical component = 24.5 m/s (approximately)

Now, we know the initial vertical velocity of the brick is 24.5 m/s. Next, we can use the kinematic equation to calculate the vertical displacement of the brick during its flight. The equation is as follows:

Vertical displacement = (initial vertical velocity * time) + (0.5 * acceleration * time²)
Since the brick is thrown upward, the acceleration due to gravity should be negative (-9.8 m/s²).

Plugging in the values, we have:
Vertical displacement = (24.5 m/s * 6 s) + (0.5 * -9.8 m/s² * (6 s)²)
Vertical displacement = 147 m + (-176.4 m)
Vertical displacement = -29.4 m

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Physical changes refer to alterations in the properties or characteristics of matter without changing its chemical composition. Some examples of physical changes include changes in state, size, shape and color.

Changes in state are common physical changes that occur when matter transitions between solid, liquid, or gas phases. This change occurs due to a change in temperature or pressure. For example, water freezing into ice or boiling into steam are examples of changes in state.

Changes in size, shape, and texture occur when matter undergoes physical alterations without any changes in its chemical composition. For instance, cutting a piece of paper into small pieces, hammering a metal sheet to make it thinner, or molding clay into a different shape are all examples of physical changes.

Changes in color are also physical changes. They occur when the light-reflecting properties of a material change due to a physical alteration. For instance, when copper is exposed to air, it turns green due to a chemical reaction, but when iron rusts, it changes color due to a physical change in its surface.

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The correct option is B. The spectrum of a signal is the range of frequencies in the signal.

A spectrum (plural spectra or spectrums) is a condition that isn't restricted to a specific set of values but can vary, without gaps, across a continuum. The word became first used scientifically in optics to explain the rainbow of colors in visible light after passing via a prism. As clinical information of mild superior, it got here to apply to the whole electromagnetic spectrum. It thereby has become a mapping of a variety of magnitudes (wavelengths) to a range of traits, which are the perceived "shades of the rainbow" and different houses which correspond to wavelengths that lie outdoors of the visible light spectrum.

Spectrum has due to the fact that been implemented via analogy to topics outside optics. therefore, one would possibly communicate approximately the "spectrum of political opinion", the "spectrum of interest" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such makes use of implying a wide variety of situations or behaviors grouped together and studied under an unmarried identity for ease of discussion. Nonscientific makes use of the time period spectrum is once in a while deceptive.

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Complete Question:

The spectrum of a signal is:

A. the lowest frequency value subtracted from the highest

B. the range of frequencies in the signal

C. all of the frequencies from 0 to the highest frequency used

D. the average of the highest frequency and the lowest

Answer: easy it’s c

Explanation:

The true statement about sound waves include;  Sound is caused when something vibrates, and  Sound moves by longitudinal waves.

option A and B are the correct answers.

A mechanical wave is a type of wave that requires material medium for its propagation.

A mechanical wave can be of two types based on mode of propagation;

A longitudinal wave travels parallel to the direction of the wave's vibration, while transverse wave travels perpendicular to the direction of the wave's vibration.

An example of longitudinal wave is sound wave. Pitch and loudness are basic characteristic of sound waves because they determine the quality of the sound.

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Answer:

9.80 kg

Explanation:

F = ma

96 N = m(9.8 m/s^2)

m = 9.80 kg

The mass of the ball will be m= 9.8 kg

It states that the force is equal to the rate of change of momentum . For a constant mass , force is equal to mass times acceleration

given :

Force due to gravity = 96 N

g = acceleration due to gravity = 9.8 m /s^2

using Newton's second law of motion

Since , F = ma

          96 = m g

          m = 96/9.8

          m= 9.8 kg

The mass of the ball will be m= 9.8 kg

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Pons, Fourth ventricle, Choroid plexus, Medulla oblongata, Anterior lobe, Arbor vitae, cerebellar cortex Posterior lobe, Folia are parts of brain.

Pons which is one of structure of the brain stem, which helps in the passage of pyramidal tract which is descending tract or corticospinal tract

Fourth ventricle

One of major ventricle of the brain which is filled with the cerebrospinal fluid which is formed from the choroid plexus of the ventricles, which is located near the cerebellum and pons and medulla oblanagata

Choroid plexus

A network of the blood vessels in the each ventricle here it is in the fourth ventricle major function is the production of the cerebrospinal fluid.

Medulla oblongata

one of structures in the brain stem along with Pons and midbrain, which vital centers they are : cardiac , respiratory centres which regulates their functions, labelling in the left side of the Diagram from top to bottom.

Arbor vitae

Which is cerebellar white matter Branching and appearance as tree which brings sensory and motor information to and from cerebellum cerebellar cortex

Cerebellar cortex is the portion of the cerebellum separated from the Posterior lobe by the primary fissure, helps in the mediating the unconscious proprioception

Posterior lobe

which is another lobe of the Cerebellum separated from the anterior lobe by the primary fissure helps in the fine motor coordination

Folia :

The Cerebellar cortex is deeply grooved and appears as thin transverse leaves called folia, which Increases the surface area of Cerebellum thereby increase the cell number.

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The Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

The Productivity Index (PI) is a measure of the well's ability to deliver fluids from the reservoir to the wellbore. It is calculated by dividing the difference between the reservoir pressure and the flowing bottomhole pressure by the production rate. In this case, the reservoir pressure is given as 3,000 psi, and the flowing bottomhole pressure is measured at 2,990 psi. The production rate is 5 barrels per day.

For calculating the PI, use the formula:

PI = (Reservoir Pressure - Flowing Bottomhole Pressure) / Production Rate

Substituting the given values into the formula:

PI = (3,000 psi - 2,990 psi) / 5 bbls per day

Simplifying the equation:

PI = 10 psi / 5 bbls per day

PI = 2 psi/bbl per day

Therefore, the Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

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The ethologists definition of a genetically programmed action pattern is a sequence of responses that are innate and inherited in a species that occur in a stereotyped, predictable way in response to a particular stimulus.

In animal behavior, a genetically programmed action pattern is a series of behaviors that are predictable, organized, and innate. A response series that is programmed genetically is a characteristic behavior pattern that a particular animal species consistently exhibits. An animal's responses to environmental stimuli are largely genetically inherited and innate.These behavior patterns are characterized by their predictability, regularity, and specificity. They are consistently shown by animals of the same species in response to a particular environmental cue. In animals, this response is referred to as a fixed action pattern (FAP). It is a behavior that is innate and fixed in an organism's genotype.

An instinctual behavioural sequence that is highly stereotyped and species-specific is referred to as a fixed action pattern in ethology. The intrinsic releasing mechanism, a "hard-wired" neural network, is claimed to create fixed action patterns in response to a sign/key stimulus or releaser. A fixed action pattern runs to completion after being released.

Konrad Lorenz, who created the idea, is frequently linked to this phrase. Fixed action patterns include six properties, according to Lorenz. These traits describe stereotyped, complicated, species-specific, released, triggered, and experience-independent fixed action patterns.

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Answer:

1.82 m/s

Explaintion:

Use v=u+at

v=0+(3.5×0.52)

v=1.82m/s

v= final speed measured in metres per second

(m/s or ms-¹)

u=Initial speed measured in (m/s or ms-¹)

a=acceleration measured in metres per second squared(ms-²)

t=time measured in second (s)

Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

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The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

According to Faraday's Law of Induction, an induced electromotive force (emf) is produced in a closed loop when the magnetic flux through the loop changes over time. If the magnetic flux through the loop is increasing linearly with time, the induced emf in the loop will also increase linearly with time.

This is because the rate of change of magnetic flux is directly proportional to the induced emf.

Mathematically, this can be expressed as:

EMF = -dΦ/dt

Where EMF is the induced electromotive force, Φ is the magnetic flux, and dt is the time interval. If the magnetic flux is changing at a constant rate, then the induced emf will also be constant.

However, if the magnetic flux is changing at a non-constant rate, the induced emf will change accordingly.

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Answer:

it can be built in mine craft

Explanation:

Answer:

put 2 pistons on each side and then put the block you want the door to be and power it with redstone