Jack pulls a sled across a level field by exerting a force of 120.0 N at an angle of 30.0° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?A. 208 N, 120 NB. 120 N, 208 NC. 104 N, 60 ND. 60 N, 104 NE. 69 N, 208 N

The atoms must have the same natural frequency as the light, allowing the atoms to vibrate at the same frequency. The atom collides with other atoms absorbing the energy and converting it to heat.

The absorption of light by a particular material occurs when the frequency of the light wave matches the frequency at which electrons in the atoms of that material vibrate.

The asbroption of this light causes heat to be generated.

Thus, we can conclude that, the atoms must have the same natural frequency as the light, allowing the atoms to vibrate at the same frequency. The atom collides with other atoms absorbing the energy and converting it to heat.

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Answer: a

Explanation: :)

Answer:

False

Explanation:

Electromagnetic strength is inversely proportional to separation distance

The given reaction is a nuclear reaction hat involves the emission of helium nucleus

Reason:

First part:

The given nuclear reaction is presented as follows;

\(\dfrac{225}{88} Ra \longrightarrow \dfrac{4}{2} He + \dfrac{222}{[\ ]} Rn\)

The value for the missing box; Required

Solution:

Let x represent the number in the missing box

Where the protons are conserved, the atomic number of the reactants and product are equal

Therefore, we have;

88 = 2 + x

∴ x = 88 - 2 = 86

x = 86

The missing box would be the number 86

Second part:

The nuclear reaction involves the emission of an helium nucleus from radium, Ra, to form a radon, Rn

The emission of an Helium nucleus (alpha particle) is a form of alpha decay

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Answer:

box A: 86

Box B: Alpha

The picture in the mirror of yourself is a virtual image because it is just light bouncing off you into the mirror and back into your eyes. It is not actually present.

Answer:

we can say that virtual images are those images which we can just see, but they are not actually present

Explanation:

A virtual image is formed when light rays coming from an object only appear to meet at a point when produced backwards (but do not actually meet) after reflection from a mirror.

5.94 ×10-26 J of energy of photons of radio waves is required to leave an FM station having 90MHz broadcast frequency

A photon's energy E and frequency f are exactly related. This is expressed mathematically as

Equation

E=hf      (1)                       

where h is the Planck constant.

Given that the frequency of the radio wave is f=90 MHz

=9.0×107 Hz

and knowing the fact that the numerical value of Planck's constant is h=6.6×10−34 m-m-kg/s

then the energy of the photon in J using Eq. (1) is:

E=6.6×10−34× 9×107

E=5.94 ×10-26 J

what is Frequancy?

The frequency of a repeated event is its number of instances per time unit.   It differs from angular frequency and is sometimes referred to as frequency for clarification. The unit of frequency is hertz (Hz), or one occurrence per second. The duration is the inverse of frequency since it is the amount of time that passes between events.

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The spectral type of a star can be used to determine its color and A star with spectral type A is cooler than a star with spectral type B.

A spectrum can be naturally represented by a rainbow. Optical researchers were the first to adopt the term spectrum. They understood by the word the spectrum of colors visible light displays when split by a prism. The spectrum that is created when light passes through a prism serves as an example of how light disperses.

A photon of luminous energy is released when an electron switches from a better energy (higher angular momentum) orbit to a reduced energy orbit. The frequency of the photon, v, is associated with energy difference, E, by the formula v=E/h.

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The complete question is -

Which of the following statements about spectral types of stars is true?

A) The spectral type of a star can be used to determine its surface temperature.

B) The spectral type of a star can be used to determine its color.

C) A star with spectral type F2 is hotter than a star with spectral type F3.

D) A star with spectral type A is cooler than a star with spectral type B.

E) All of the above are true.

The main advantage of hydroelectric energy is the fact that it is a renewable energy source (Option C).

Hydroelectric energy refers to the energy from water bodies that can be used to generate electricity.

Hydroelectric energy is stored as potential energy and then converted to kinetic motion energy to be converted into electricity.

Hydroelectric energy is renewable because it is indefinitely generated by water bodies in nature.

In conclusion, the main advantage of hydroelectric energy is the fact that it is a renewable energy source (Option C).

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The angular velocity of each tire from the calculation that we have done is 4.0 rad/s.

Let us recall that the linear velocity is the rate of the change of the displacement of an object with time. We now know that it is possible to relate the angular velocity with the linear velocity by the use of the equation;

v=rw

We now have

v = lnear velocity

r = radius

w = angular velocity

w = v/r

w = 3.0 m/s/(1.5 m/2)

w = 4.0 rad/s

Thus we obtain that we have found the angular velocity as 4.0 rad/s.

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Answer:

52.50 Kg

Explanation:

Physical science magic

Answer:

C. 52.50 kg

Explanation:

Answer:

It is a weighted average of the masses of an element’s isotopes.

Explanation:

The best definition of the atom mass of an element is that it is a weighted average of the masses of an element's isotopes.

 Atomic mass  = ∑m\(_{i}\) a\(_{i}\)

where m\(_{i}\) is the mass of the isotope i

            a\(_{i}\) is the abundance of the isotope i

Pressing brakes without locking wheels stops car in least time on dry pavement.

What method will stop a car in the least amount of time on dry pavement?

Pressing the brakes as hard as possible without locking the wheels and rolling to a stop will stop the car in the least amount of time. This is because when you slam on the brakes and lock the wheels, the tires lose their grip on the road and start skidding, which increases the distance required to bring the car to a stop.

On the other hand, when you press the brakes as hard as possible without locking the wheels, the tires maintain their grip on the road, allowing the car to slow down more quickly. This method is also safer because it allows the driver to maintain control of the vehicle and steer around any obstacles that may be in the way.

In summary, it's important to remember that slamming on the brakes and locking the wheels may seem like the quickest way to stop a car, but it actually increases the stopping distance and presents a greater risk of losing control of the vehicle. Pressing the brakes as hard as possible without locking the wheels is the safest and most effective way to bring a car to a quick stop on dry pavement.

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The statement "The hoop reaches the bottom first". is true because When a coin and a hoop roll without slipping down an incline, the hoop reaches the bottom first. This is due to the difference in their rotational inertia or moment of inertia.

The moment of inertia depends on the mass distribution and shape of an object. For a hoop, its moment of inertia is greater than that of a coin. The moment of inertia of a hoop is given by I = MR², where M is the mass of the hoop and R is its radius.

When the coin and the hoop roll without slipping down the incline, their linear accelerations are the same since they start from rest. However, the rotational acceleration of the hoop is smaller because of its larger moment of inertia.

As a result, the hoop takes a longer time to rotate and reach the bottom of the incline compared to the coin. The coin, having a smaller moment of inertia, reaches the bottom first.

Therefore, the statement (a) is true: the hoop reaches the bottom first in this scenario. The race to the bottom does not depend on their relative masses or diameters, but rather on the difference in their moment of inertia.

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Answer:

I need help on this tooo

Explanation:

6.94 mins time will it be until there are 60 grams of the element remaining.

Given data :

F is the future amount (we want it to be 60)

P is the present amount (580 now)

r is the rate of decay per minute (27.9% = 27.9/100 = 0.279)

t is the time it takes (what we want to find)

Substituting, we get our answer to be:

F = P \(( 1 - r )^{t}\)

60 = 580 \(( 1 - 0.279 )^{t}\)

60 =  580 \((0.721)^{t}\)

0.1034 = \(0.721^{t}\)

Ln ( 0.1034) = Ln \((0.721^{t} )\)

Ln ( 0.1034)  = t x ( 0.721)

t = \(\frac{Ln(0.1034)}{Ln(0.721)}\) = 6.94

So, it is going to take about 6.94mins, rounded to nearest tenth (1 decimal), we have:  About 6.94mins

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The volume and density of the 60g material are 120cm³ and 0.5 g/cm³ respectively.

Density is expressed mathematically as;

p = m / v

Where m is mass and v is volume.

Given the data in the question;

First, we calculate the volume of the material.

Volume v = l × w × h

Volume v = 4cm × 5cm × 6cm

Volume v = 120cm³

Now, we determine the density of the material.

p = m / v

p =  60g / 120cm³

p = 0.5 g/cm³

Therefore, the density of the material is 0.5 g/cm³.

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The statement that best fits the given description of Venus is: "Venus' rotation on its axis is retrograde, unlike most other solar system objects."

This means that Venus rotates in the opposite direction to the direction in which it orbits the sun. The statement "is the fastest of the terrestrial planets" is incorrect, as Venus has a slower rotation period than Mercury, which has the fastest rotation.

The statement "shows it is tidally locked in its orbit around the sun" is also incorrect, as Venus is not tidally locked to the Sun, although its rotation is relatively slow compared to its orbital period. The statement "is highly tilted to its orbital plane, causing large seasonal changes" is incorrect, as Venus has a very small axial tilt, meaning it experiences very little seasonal variation.

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Answer:

The chloroplast produces sugar

Answer:

\(\boxed {\tt Chloroplasts}\)

Explanation:

In some organisms (plants, algae, types of bacteria) there are chloroplasts in the cells.

A process called photosynthesis occurs at these organelles. Let's look at the photosynthesis equation.

6CO₂+6H₂O+light energy --> C₆H₁₂O₆+6O₂

Carbon dioxide, water, and energy from the sun become glucose/sugar and oxygen.

Since photosynthesis produces sugar and photosynthesis occurs in the chloroplast. So the organelle that produces sugar is chloroplasts.

The bird has the most potential energy when it is at the highest point of its dive into the ocean.

1. Potential energy is the energy possessed by an object due to its position or state.

2. In this case, we are considering the potential energy of a bird diving into the ocean.

3. The potential energy of an object depends on its height and mass.

4. When the bird is at the highest point of its dive, it has the maximum potential energy.

5. As the bird dives deeper into the ocean, its height decreases, resulting in a decrease in potential energy.

6. At the moment the bird reaches the surface of the water, its potential energy is at its minimum, as it is at its lowest height.

7. The potential energy is converted into kinetic energy as the bird accelerates towards the water.

8. Kinetic energy is the energy possessed by an object due to its motion.

9. When the bird enters the water, its potential energy is completely converted into kinetic energy.

10. The bird continues to possess kinetic energy as it moves through the water.

11. Once the bird comes to a stop in the water, its kinetic energy is reduced to zero.

12. At this point, the bird's potential energy is also zero, as it is at its lowest height and not in motion.

13. Therefore, the bird has the most potential energy when it is at the highest point of its dive into the ocean.

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Answer:

9000 SECONDS

Explanation:3 hours=180 mins

                     180+30=210mins

                      150x60=12600secs

Physical Science B - Accommodated Finalb. 10jPhysical Science is the branch of natural science that deals with matter, energy, and their interactions. It can be divided into two branches: Chemistry and Physics. Both of these disciplines work together to study the physical world.

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The equal and opposite force for the force of the elevator floor pushing up on the person as described by Newton's third law is the weight and the reaction force from its effect.

This is referred to as a device which is used in the vertical transportation of goods and people among the floors in a buildings.

When an individual steps into the elevator, the weight acts on it and it is known as a downward force while the reaction acts upward in an opposite reaction as described by Newton's third law in this scenario.

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Answer:

The Coriolis effect describes the pattern of deflection taken by objects not firmly connected to the ground as they travel long distances around Earth. ... The key to the Coriolis effect lies in Earth's rotation. Specifically, Earth rotates faster at the Equator than it does at the poles.

-Google

Explanation:

The Coriolis effect is an apparent force brought on by the rotation of the earth.

The Coriolis force is an apparent force brought on by the rotation of the earth. In the northern hemisphere, the Coriolis force causes winds to be deflected to the right, and in the southern hemisphere, to the left. It is often referred to as "Ferrel's Law."

A revolving frame of reference causes an apparent effect known as the Coriolis Effect. When an item travelling straight ahead is observed from a non-fixed frame of reference, the effect happens. The Earth, which spins at a constant speed, serves as the moving frame of reference. Due to Earth's rotation, an object travelling in a straight line that is seen from Earth appears to lose its direction.

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Answer:

-8m/s

Explanation:

v=wavelength*f=-2*4=-8m/s

a) The ratio of the rms speed of a gas A atom over the rms speed of a gas B atom is 2:1.

This is because the kinetic energy of a particle is proportional to the square of its mass. Because the mass of a gas A atom is twice the mass of a gas B atom, the rms speed of a gas A atom must be twice the rms speed of a gas B atom to maintain the same temperature.  

b) The ratio of their temperatures must be 2:1. This is because the rms speed of a gas A atom is the same as the rms speed of a gas B atom, so the kinetic energy of each atom must be equal.

Since the kinetic energy is proportional to the square of the mass, the temperature of gas A must be twice that of gas B to maintain the same rms speed.

c) The ratio of the heat capacity of gas A over the heat capacity of gas B is 4:3. This is because the heat capacity is proportional to the mass, and the mass of a gas A atom is twice the mass of a gas B atom.

The ratio of the final pressure of gas A over the final pressure of gas B is 8:9. This is because the pressure is proportional to the temperature, and the temperature of gas A doubles but the temperature of gas B triples. The higher temperature of gas B results in a higher final pressure.

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Cascade and cascade connections in a multistage amplifier have some similarities and differences.

The similarities and differences between cascade and cas code connections in a multistage amplifier are mentioned below: Similarities between cascade and cas code connections Both cascade and cascode connections are multistage amplifiers that offer a high voltage gain and frequency response. They have similar output impedances, and there is a gain associated with every stage in both circuits. They both employ a single transistor gain stage that has a high voltage gain. Difference between cascade and cascode connections.

The primary difference between a cascode connection and a cascade connection is that the cascode configuration offers a higher voltage gain than the cascade connection. Cascade amplifiers are less expensive than cascode amplifiers, but they have a higher distortion rate. The voltage gain of a cascode connection is twice that of a cascade connection. This is because the cascode configuration utilizes two transistors instead of one. The cascode amplifier has better distortion characteristics because it has more negative feedback than the cascade amplifier.

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Answer:

C

Explanation:

C should be the right answer

Answer:

The magnitude of the net electric field is:

\(E_{net}=90.37\: N/c\)

Explanation:

The electric field due to q1 is a vertical positive vector toward q1 (we will call it E1).

On the other hand, the electric field due to q2 is a horizontal positive vector toward q2(We will call it E2).

Knowing this, the magnitude of the net electric field will be the E1 + E2.

Let's find first E1 and E2.

The electric field equation is given by:

\(|E_{1}|=k\frac{|q_{1}|}{d_{1}^{2}}\)

Where:

\(|E_{1}|=(9*10^{9})\frac{|-2.60*10^{-9}|}{0.538^{2}}\)

\(|E_{1}|=80.84\: N/C\)

And E2 will be:

\(|E_{2}|=k\frac{|q_{2}|}{d_{2}{2}}\)

\(|E_{2}|=(9*10^{9})\frac{|-8.30*10^{-9}|}{1.36^{2}}\)

\(|E_{2}|=40.39\: N/C\)

Finally, we need to use the  Pythagoras theorem to find the magnitude of the net electric field.

\(E_{net}=\sqrt{E_{1}^{2}+E_{2}^{2}}\)

\(E_{net}=\sqrt{80.84^{2}+40.39^{2}}\)

\(E_{net}=90.37\: N/c\)

I hope it helps you!

Answer:

+90.3 N/C

Explanation:

acellus

Answer: \(0.0039\ A\)

Explanation:

Given

Diameter of the rod \(d=2.54\ cm\)

length of rod is \(l=20\ cm\)

Resistivity of silicon is \(\rho=6.4\times 10^2\ \Omega-m\)

cross-section of the rod \(A\)

\(\Rightarrow A=\dfrac{\pi d^2}{4}\\\\\Rightarrow A=\dfrac{3.142\times 2.54^2\times 10^{-4}}{4}\\\\\Rightarrow A=5.067\times 10^{-4}\ m^2\)

Resistance of rod is  R

\(\Rightarrow R=\dfrac{\rho l}{A}\)

\(\Rightarrow R=\dfrac{640\times 0.20}{5.067\times 10^{-4}}\\\\\Rightarrow R=25.26\times 10^4\ \Omega\)

Current is given by

\(\Rightarrow I=\dfrac{V}{R}\\\\\Rightarrow I=\dfrac{1000}{25.26\times 10^4}\\\\\Rightarrow I=0.0039\ A\)

Answer: When there are two objects of different temps, the heat will always move from the higher temp to the lower temp. The energy will stop moving when there is equilibrium, when both objects are at the same temperatures.