The specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise _____ kg of oxygen by 1°C. What number completes the sentence?

Answer:

800 Newtons.

Explanation:

Work is defined as the force applied to an object multiplied by the distance over which the force is applied. The formula for work is W = F x d.

In this case, the force required to lift the box is equal to the work done divided by the distance.

F = W / d

F = 800 J / 5 m

To convert Joules to newtons, we need to use the relation 1 Joule = 1 Newton x Meter

F = 800 N

So the box weighed 800 Newtons.

Answer:

The suction pressure decreases and the superheat increases when the liquid line is restricted and the supply of refrigerant to the metering device is reduced.

Explanation:

1. The five components of refrigeration are:

       The compressor limits the vapor released by the refrigerant. This            

       causes a rise in pressure (in refrigerant), which then pushes the  

       vapor into the coils on the outside of the refrigerator.

2. Now when the cooler air meets the warm gas present in the coils, it

   gets converted into liquid form.

3. Thus, when the liquid form is at high pressure, the refrigerant then  

   cools down as it flows through the coils placed in the fridge ( in both

   freezing and normal sections).

4. The refrigerant also absorbs the warm air present in the fridge, which  

   causes it to evaporate and flow back through the compressor and the

   cycle repeats in the same form.

Thus, when the liquid line is restricted and the supply of refrigerant to the metering device is reduced it causes a decrease in suction pressure and an increase in superheat.

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the object moving at constant velocity so the answer is c

a) The initial height of the center of mass of the can and soda is 6.0 cm.

b) After the soda is drained out, the height of the center of mass of the can alone is still 6.0 cm.

c) As the soda drains out, the center of mass of the can and remaining soda will rise.

d) The height of the remaining soda when the center of mass reaches its lowest point is 4.77 cm.

a) To find the initial height of the center of mass, we can use the fact that the center of mass of a uniform object is located at the geometric center. Since the can is uniform, the center of mass is at the midpoint of its height, which is 12.0 cm / 2 = 6.0 cm.

b) When all of the soda is drained out, the mass of the can will be 0.140 kg and the height of the can will still be 12.0 cm. Since the can is now empty, the center of mass will be at the midpoint of its height, which is 12.0 cm / 2 = 6.0 cm.

c) As the soda drains out, the center of mass of the can and remaining soda will rise. This is because the soda has a lower density than the can, so the center of mass of the can and soda system is initially lower than the center of mass of the empty can alone. As the soda drains out, the average density of the remaining material increases, causing the center of mass to rise.

d) Let x be the height of the remaining soda at any given instant. The center of mass of the can and remaining soda is given by

h = (m1h1 + m2h2) / (m1 + m2)

where m1 is the mass of the can, m2 is the mass of the remaining soda, h1 is the height of the can (12.0 cm), h2 is the height of the remaining soda (x), and h is the height of the center of mass.

To find the lowest point of the center of mass, we need to find the minimum value of h. Taking the derivative of h with respect to x and setting it to zero, we get

dh/dx = m1 / (m1 + m2) - m2h1 / (m1 + m2)^2 = 0

Solving for x, we get

x = h1 × m1 / m2

Substituting the given values, we get

x = 12.0 cm × 0.140 kg / 0.354 kg = 4.77 cm

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Answer: heat, energy that is transferred from one body to another as the result of a difference in temperature. If two bodies at different temperatures are brought together, energy is transferred—i.e., heat flows—from the hotter body to the colder.

Explanation:

Answer:

heat, energy that is transferred from one body to another as the result of a difference in temperature. If two bodies at different temperatures are brought together, energy is transferred—i.e., heat flows—from the hotter body to the colder.

Explanation:

Answer:

L * W

Explanation:

length multiplied width

Explanation:

You can calculate area of rectangle as

\(a = l \times w\)

Which is a= Area

l = length

w = width

If it is plane figure and for solid figure.

Answer:

hope it helps you...........

Answer:

Explanation:

m = 4.0 kg

v = 2.0 m/s

g = 10 m/s²

Mechanical energy of the pendulum = 68.0 J

Mechanical energy of the pendulum  = Potential energy of the pendulum  + Kinetic energy of the pendulum

mgh + 1/2 mv² = 68

4 × 10 × h + 1/2 × 4 × 2 × 2 = 68

40 h + 8 = 68

40 h = 68-8

40 h = 60

h = 60 / 40

h = 3/2 m

h = 1.5 m

The gauge pressure in atm at point P where the needle meets the wider body of the syringe is approximately 0.706 atm.

What is a gauge pressure?The gauge pressure is the difference between the absolute pressure and the local atmospheric pressure. Absolute pressure is the sum of gauge pressure and atmospheric pressure. The atmospheric pressure varies depending on the altitude and weather conditions. Standard atmospheric pressure at sea level is 1 atm or 101.325 kPa or 14.7 psi. Gauge pressure is also known as relative pressure. For example, if the atmospheric pressure is 1 atm and the gauge pressure is 1 atm, then the absolute pressure is 2 atm (1 atm + 1 atm).

Pressure at the exit of the needle is 1.0 atmWe know that the absolute pressure is the sum of gauge pressure and atmospheric pressure. The atmospheric pressure is 1 atm since it is not specified otherwise.So, the absolute pressure at point P is P = 1 atm + gauge pressureTherefore, gauge pressure at point P is gauge pressure = P - 1 atmLet the gauge pressure at point P be PGP,Then, PGP = P - 1 atmPGP = 1.706 - 1 atmPGP = 0.706 atmTherefore, the gauge pressure in atm at point P where the needle meets the wider body of the syringe is approximately 0.706 atm.

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Particle A experiences a magnetic force that acts towards the left direction, not towards the downward direction. Particle B experiences a magnetic force that acts in the downward direction. Particle C experiences a magnetic force that acts towards the right direction, not towards the downward direction.

The magnetic force on a charged particle moving in a magnetic field is given by:

Fm = q(v x B)

where Fm is the magnetic force, q is the charge of the particle, v is the velocity of the particle, and B is the magnetic field.

In this problem, the magnetic field is produced by the four wires carrying currents. Using the right-hand rule, we can determine the direction of the magnetic field at each of the four charged dust particles. For particle A, the velocity is downward and the magnetic field is into the page, so the cross product v x B is to the left. Therefore, particle A has a magnetic force exerted on it in the leftward direction, not the downward direction.

For particle B, the velocity is to the right and the magnetic field is into the page, so the cross product v x B is downward. Therefore, particle B has a magnetic force exerted on it in the downward direction. For particle C, the velocity is upward and the magnetic field is out of the page, so the cross product v x B is to the right. Therefore, particle C has a magnetic force exerted on it in the rightward direction, not the downward direction.

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Answer:

D

Explanation:

right hand rule

Answer:

8 minutes

Explanation:

Light travels at a speed of 299,792

kilometers per second; 186,287 miles

per second. It takes 499.0 second

for light to travel from the Sun to the

Earth, a distance celled 1 Astronomical

Unit.

Radiation dosage is usually measured in rads.

When ionizing radiation enters a human body or object, it stores energy. The energy absorbed by exposure to radiation is called dose. Radiation dose size is expressed in three ways: absorbed, equivalent and effective.

The energy absorbed by the human body after being exposed to radiation is called the absorbed dose. Absorbed dose is measured in units called Grays (Gy). A dose of 1 Gray corresponds to 1 Joule of energy stored in 1 kilogram of matter. Radiation has always been around us. In fact, life evolved in a world containing significant amounts of ionizing radiation. It comes from space, earth, and even from within our own bodies. Natural background radiation doses vary by location and habits.

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The correct answer is A. A water molecule entering the lake will remain in the lake for 600 years.

Residence time refers to the average amount of time that a water molecule spends in a particular body of water, such as a lake. In the case of Lake Tahoe, the residence time is approximately 600 years. This means that, on average, a water molecule that enters the lake will remain in the lake for 600 years before leaving through the outlet.

Option B is incorrect because the total volume of water in Lake Tahoe can vary due to precipitation, evaporation, and other factors.

Option C is also incorrect because the residence time of water in Lake Tahoe does not necessarily relate to the ability of the lake to sustain aquatic life.

Option D is incorrect because outflow from Lake Tahoe occurs regularly and is not limited to once every 600 years.

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Answer:

Z = 1879.64 Ω = 1.879 KΩ

Explanation:

First, we will find the capacitive reactance of the capacitor:

\(X_{c} = \frac{1}{2\pi fc}\\\)

where,

Xc = Capacitive Reactance = ?

f = frequency = 50 Hz

C = Capacitance = 2 μF = 2 x 10⁻⁶ F

Therefore,

\(X_{c} = \frac{1}{2\pi(50\ Hz)(2\ x\ 10^{-6} F)}\\X_{c} = 1591.55\ \Omega\)

This is an RC series circuit. In the RC circuit the value of impedance is given by the following formula:

\(Z = \sqrt{R^2 + X_{c}^2}\\Z = \sqrt{(1000\ \Omega)^2 + (1591.55\ \Omega)^2}\\\)

Z = 1879.64 Ω = 1.879 KΩ

Answer: 3.045 km/s

Explanation:

When an object is doing a circular motion, the velocity of the object is written as;

v = r*w

where;

r = radius of the circle

w = angular velocity.

In this case, we know that:

w = 7.25*10^(-5) s^-1

And the radius will be equal to the radius of the Earth, plus the height of the satellite, this is:

R = radius of the Earth + 35600 km = 6400km + 35600 km  = 42000 km

Then the velocity of the satellite will be:

v =  42000 km*7.25*10^(-5) s^-1 = 3.045 km/s

The velocity of a satellite with an orbit 35600 km above the surface of the earth and an angular velocity of 7.25×10–5 rad/sec = 3045 m/s

Velocity: This is the rate of change of displacement.

To solve this problem we need to use the formula for calculating the velocity of  an object in circular motion

The Velocity of the satellite is given as

V = ωr................ Equation 1

where V = velocity of the satellite, ω = angular velocity of the satellite, r = radius of the circle.

Note: r = height of the satellite above the surface of the earth+Radius of the earth

From the question,

Given: ω = 7.25×10⁻⁵ rad/sec, r = 35600+6400 = 42000 km = 4.2×10⁷ m

Substitute these values into equation 1

V = (7.25×10⁻⁵)(4.2×10⁷ )

V = 30.45×10²

V = 3045 m/s

Hence, the velocity of the satellite is 3045 m/s

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Answer:

40g

Explanation:

Mass = density x volume

= 2 x 20

= 40g

Answer:

m =  V × ρ

=  20 milliliter × 2 gram/cubic meter

=  2.0E-5 cubic meter × 2 gram/cubic meter

=  4.0E-5 gram

=  4.0E-8 kilogram

Explanation:

The density of a material, typically denoted using the Greek symbol ρ, is defined as its mass per unit volume.

ρ =    

m  

V

           where:

ρ is the density

m is the mass

V is the volume

The calculation of density is quite straightforward. However, it is important to pay special attention to the units used for density calculations. There are many different ways to express density, and not using or converting into the proper units will result in an incorrect value. It is useful to carefully write out whatever values are being worked with, including units, and perform dimensional analysis to ensure that the final result has units of mass  volume. Note that density is also affected by pressure and temperature.

Answer: I think the answer is C

Answer:

Planets generally follow elliptical orbits.

The eccentricity describes the ellipticity of the orbit, that is, the departure of an orbit from a circular orbit.

After fertilization in the fallopian tube, It will take 6-12 days for the zygote to travel before arriving at the uterus.

A zygote is, generally speaking, a cell created by the fusion of two gametes; the growing person is created from such a cell.

It takes the zygote around 6–12 days following fertilization in the fallopian tube for the fertilized egg to travel to the uterus and attach to the uterus, a process known as implantation.

Hence It will take 6-12 days for the zygote to travel before arriving at the uterus.

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The coefficient of friction between the soap and the floor is 0.081

If Juan steps on the soap with a force of 493 N, this is her weight, W. This weight also equals the normal reaction on the floor, N.

We know that frictional force F = μN where μ = coefficient of friction between soap and floor.

So, μ = F/N

Since F = 40 N and N = W = 493 N,

μ = F/N

μ = 40 N/493 N

μ = 0.081

So, the coefficient of friction between the soap and the floor is 0.081

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Answer:

Those who survived the bomb may become deaf or blind, as well as suffer catastrophic burns and injuries. Even people who were not seriously injured could become trapped within a structure or unable to navigate through the wreckage.

Explanation:

The given statement "The three types of organ pipes are reed pipes flue pipes, and rank pipes" is False.

An organ pipe is a musical instrument that produces sound by vibrating columns of air. There are three main types of organ pipes: reed pipes, flue pipes, and hybrid pipes.

Reed pipes produce sound by using a vibrating reed, which is a thin piece of metal that is held in place over a small opening in the pipe. When air is blown through the pipe, it causes the reed to vibrate and produce sound. This type of pipe is commonly found in woodwind instruments such as clarinets and saxophones.

Flue pipes, on the other hand, produce sound by blowing a stream of air across a sharp edge, similar to the way air flows across the edge of a whistle. This type of pipe is commonly found in flutes and recorders.

Hybrid pipes are a combination of reed and flue pipes. They use a reed to excite the air column in the pipe, but the sound is then produced using a flue mechanism.

Rank pipes, as mentioned earlier, are not a type of organ pipe, but rather a way of arranging the pipes within an organ. Rank pipes refer to a set of pipes that are arranged in a specific order, typically according to their pitch or timbre.

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when parallel rays from a distant object travel in air and then are incident on the concave end of a glass rod with a radius of curvature of 15.0 cm and a refractive index of 1.50, they undergo refraction. The exact path of the rays can be determined using Snell's Law, but without specific incident angles or distances, we cannot provide a precise answer.

When parallel rays from a distant object travel in air and then are incident on the concave end of a glass rod with a radius of curvature of 15.0 cm and a refractive index of 1.50, they undergo refraction.

Refraction is the bending of light as it passes from one medium to another. The refractive index of a medium determines how much the light is bent when it enters that medium.

To understand how the rays are bent in this scenario, we can use Snell's Law. Snell's Law relates the angles of incidence and refraction to the refractive indices of the two media involved.

In this case, the rays are traveling from air to glass. The refractive index of air is approximately 1.00, and the refractive index of the glass is given as 1.50. The angle of incidence is the angle between the incident ray and the normal to the surface of the glass, and the angle of refraction is the angle between the refracted ray and the normal.

Using Snell's Law, we can write:

n1 * sin(angle of incidence) = n2 * sin(angle of refraction)

Substituting the given values, we have:

1.00 * sin(angle of incidence) = 1.50 * sin(angle of refraction)

Since the rays are incident on the concave end of the glass rod, they will converge towards the axis of the rod. The exact path of the rays can be determined using geometrical optics, but we are not given the specific incident angles or the distance of the object. Therefore, we cannot provide a precise answer in this case.

However, it is important to note that the refractive index of the glass and the curvature of the rod will cause the rays to bend towards the axis of the rod. The specific angles of incidence and refraction will depend on the exact geometry of the situation.
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The time taken by the projectile to hit the floor is 0.55 s.

The projectile motion refers to the motion of an object or particle that is launched into a gravitational field, such as from the surface of the Earth, and travels along a curved path while only being influenced by gravity. A body is considered to be in projectile motion if it moves both vertically and horizontally (trajectory) from the point of flight to the point of landing.

This indicates that the projectile is initially thrown at a height of 1.5 meters and a speed of 80.0 meters per second.

Since the bullet is launched horizontally, the initial vertical velocity component is zero. Just figure out how long it takes something to fall 1.5 meters from a seated position. The 80 m/s is only important if you want to know where it will land on the ground. It has no bearing on the situation. We might be led to the fundamental Newtonian equation:

hf = v₀t + (a/2)t² + h₀

Here, h stands for height, v for speed, and a for acceleration. It might be difficult to resolve this for t in some circumstances, however since

v₀ = 0, this one is easy.

0 = (-9.8/2)t² + 1.5

-1.5 = -4.9t²

-1.5/-4.9 = t²

0.55 s = t

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Answer:

Approximately \(9.7\; \rm m \cdot s^{-2}\).

Explanation:

Assuming that there is no other force on this vehicle, the \(16000\; \rm N\) force from the road would be the only force on this vehicle. The net force would then be equal to this \(16000\; \rm N\!\) force. The size of the net force would be \(16000\; \rm N\!\!\).

Let \(m\) denote the mass of this vehicle and let \(\Sigma F\) denote the net force on this vehicle.  

By Newton's Second Law of motion, the acceleration of this vehicle would be proportional to the net force on this vehicle. In other words, the acceleration of this vehicle, \(a\), would be:

\(\begin{aligned}a &= \frac{\Sigma F}{m}\end{aligned}\).

For this vehicle, \(\Sigma F = 16000\; \rm N\) whereas \(m = 1650\; \rm kg\). The acceleration of this vehicle would be:

\(\begin{aligned}a &= \frac{16000\; \rm N}{1650\; \rm kg} \\ &= \frac{16000\; \rm kg \cdot m\cdot s^{-2}}{1650\; \rm kg}\\ &\approx 9.7 \; \rm m \cdot s^{-2}\end{aligned}\).

The response is C. It has bulk and occupies room. All substance has a volume and takes up space, whether it be a solid, liquid, or gas. It is a basic characteristic of matter. While matter can move from hot to cold and perform work.

A metal-skinned hull, steam propulsion, and a main armament of guns equipped to fire explosive shells are the three qualities that define a fighting ironclad. All of these innovations reached their full maturity with the French Navy's November 24, 1859, launch of the "Gloire," but the US Civil War saw the invention of the ironclad.

Any attribute that may be measured, such as a substance's mass, volume, length, density, colour, malleability, or melting point Properties of matter include point, hardness, smell, temperature, and more.

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Answer: D

Explanation:

To determine the initial speed of the ball, we can use the fact that the vertical displacement of the ball is zero when it returns to the height from which it was hit. We'll assume that air resistance is negligible.

The equation we can use to solve for the initial speed is:

\[ \Delta y = v_{\text{initial}} \cdot t - \frac{1}{2} g t^2 \]

Since the ball returns to the same height, the vertical displacement (\(\Delta y\)) is zero. Plugging in the values:

\[ 0 = v_{\text{initial}} \cdot 4.22 \, \text{s} - \frac{1}{2} \cdot 9.8 \, \text{m/s}^2 \cdot (4.22 \, \text{s})^2 \]

Simplifying the equation:

\[ 0 = v_{\text{initial}} \cdot 4.22 \, \text{s} - 42.095 \, \text{m} \]

Solving for \( v_{\text{initial}} \):

\[ v_{\text{initial}} = \frac{42.095 \, \text{m}}{4.22 \, \text{s}} \approx 9.995 \, \text{m/s} \]

Therefore, the initial speed of the ball when it was popped straight up is approximately 9.995 m/s.

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