4. What is the closest planet to the Earth?

Venus
Mercury
Mars
Jupiter​

Answer:

In the statement of Newton's first law, the unbalanced force refers to that force that does not become completely balanced (or canceled) by the other individual forces. If either all the vertical forces (up and down) do not cancel each other and/or all horizontal forces do not cancel each other, then an unbalanced force exists. The existence of an unbalanced force for a given situation can be quickly realized by looking at the free-body diagram for that situation. Free-body diagrams for three situations are shown below. Note that the actual magnitudes of the individual forces are indicated on the diagram.

In each of the above situations, there is an unbalanced force. It is commonly said that in each situation there is a net force acting upon the object. The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out. At this point, the rules for summing vectors (such as force vectors) will be kept relatively simple. Observe the following examples of summing two forces:

Observe in the diagram above that a downward vector will provide a partial or full cancellation of an upward vector. And a leftward vector will provide a partial or full cancellation of a rightward vector. The addition of force vectors can be done in the same manner in order to determine the net force (i.e., the vector sum of all the individual forces). Consider the three situations below in which the net force is determined by summing the individual force vectors that are acting upon the objects.

Answer:

A.) armand probably looked at the graph that the liquid sensor sends information too

Explanation:

Answer:

See below

Explanation:

Horizontal component of the velocity will carry the ball to the fence in how long?

Hor vel = 50 cos 30 = 43.3 m/s       200m  /  43.3 m/s = 4.61 seconds

Vertical position given by

Df = vo t + 1/2 a t^2       with t = 4.61 secs       vo = 50 sin 30

Df = height =   11 m     <===== will not clear the fence

.............................................

each leg's strength With forces of Fab = 2.52 KN, Fcb = 2.52 KN, and Fbd = 3.64 KN, the shear leg derrick is used to raise the 200 kg fish net onto the pier. Do the compression force along each leg calculations.

(db), (ab), and (cb) of the winch cable. In physics, a force is an effect that has the ability to change how an object moves. A mass-containing object's velocity or acceleration can be altered by a force (for example, moving from a condition of rest).

If 0.6667Fab + 0.6667Fcb - 0.9231Fbd = 0, then 0.6667 Fab + 0.6667Fcb - 0.3846 Fbd - 1962 = likewise.

By resolving these three equations, we arrive to the values Fab = 2.52KN, Fcb = 2.52KN, and Fbd = 3.64KN.

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The externally applied force is directly proportional to the distance of elongation. F ∝ x, where x is the elongation of materials. F=-kx, where k is the force constant of spring.

From the given,

block 1 is attached to the spring. When there is no force applied, block 1 remains at rest. When the force is applied externally to the spring attached to block 1, it begins to oscillate. While oscillating, block 1 gets displaced to point C.

The net force acts on block 1, and applied force F is acted towards the left and pushes block 1 to move towards the right. The frictional force Ff restricts the motion of block 1, which acts towards the left.

The Normal force Fn acted normally or perpendicular to block 1 and the normal force is acted upwards. The gravitational force Fg, acts downwards to attract block 1. Therefore, the net force acted on block 1 involves applied Force, Frictional force, Normal force, and Gravitational force.

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The color of the soda bottle used in the experiment and temperature of the lab at the time of the experiment are not likely to have a significant impact on the outcome of the experiment.

What is Energy?

Energy is a fundamental concept in physics that refers to the ability of a system to perform work. It can be defined as the capacity of a physical system to do work or produce heat. Energy can exist in many different forms, such as mechanical, thermal, electromagnetic, and chemical energy. It can be transferred between objects or converted from one form to another, but it cannot be created or destroyed. The SI unit of energy is the joule (J), but other units such as kilowatt-hours (kWh) and calories (cal) are also commonly used.

Energy lost in the lever due to friction, visual estimation of height of the beanbag, and position of the fulcrum for the lever affecting transfer of energy could be potential sources of error in the experiment.

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Answer:

Va = 5000 m / 3600 s = 1.39 m/s

(Va - Vb) 60 = 10

Vb = Va - .167 = 1.22 m/s

(Va - Vb) T = 4200 Π      where T is time for A to complete 1 more lap

.17 T = 4200 Π

T = 24700 Π  time for A to again catch B

N = 1.39 * 24700 Answer:

Va = 5000 m / 3600 s = 1.39 m/s

(Va - Vb) 60 = 10

Vb = Va - .167 = 1.22 m/s

(Va - Vb) T = 4200 Π      where T is time for A to complete 1 more lap

.17 T = 4200 Π

T = 24700 Π  time for A to again catch B

N = 1.39 * 24700 Π / (4200 Π) = 8.2   laps

A will make 8 but not 9 rounds before catching B

Answer:

\(I=1.19\times 10^{-2}\ W/m^2\)

Explanation:

It is given that,

Maximum value of magnetic field strength, \(B=10^{-8}\ T\)

We need to find the intensity of the light at that place.

The formula of the intensity of magnetic field is given by :

\(I=\dfrac{c}{2\mu _o}B^2\)

c is speed of light

So,

\(I=\dfrac{3\times 10^8}{2\times 4\pi \times 10^{-7}}\times (10^{-8})^2\\\\I=1.19\times 10^{-2}\ W/m^2\)

So, the intensity of the light is \(1.19\times 10^{-2}\ W/m^2\).

After 2 seconds distance traveled is 31.59 m, and the velocity is 15.8 m/s.

The acceleration of the particle is calculated as follows;

s = ut + ¹/₂at²

14.75 = 6.33(1) + 0.5(a)(1)²

14.75 = 6.33 + 0.5a

8.42 = 0.5a

a = 8.42/0.5

a = 16.84 m/s²

s = ut + ¹/₂at²

s = 6.33(2) +  0.5(16.84)(2)²

s = 46.34 m

Distance traveled from 1 second to 2 second = 46.34 m - 14.75 m = 31.59 m.

velocity = 31.59 m / 2 s = 15.8 m/s

Thus, after 2 seconds distance traveled is 31.59 m, and the velocity is 15.8 m/s.

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The precession is the motion of Earth along its orbital path.

Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis.

Precession of the Earth's axis consists of a cyclic wobbling in the orientation of Earth's axis of rotation with a period of 25,772 years.

The precession of the Earth's axis  wobble is due to tidal forces caused by the gravitational influences of the Sun and Moon.

Thus, precession is the motion of Earth along its orbital path.

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Answer:

Volumetric cylinders and volumetric flasks are used to measure volume of liquids contained in them. They are calibrated for volume included in them - this is indicated by the marking "IN". The liquid has accurate volume when it reaches the corresponding marking on the scale. Volume is usually indicated in mL. Mark me brainliest please

The relationship between wavelength and frequency is given by

Where

λ = wavelength

v = speed of light

f = frequency

The speed of light in free space is 2.998×10⁸ m/s

For the given case, the wavelength is 442×10⁻⁹ m

So, the corresponding frequency of this color of light is

Therefore, the frequency of this color of light is 6.79×10¹⁴ Hz

Option A is the correct answer.

Answer: true

Explanation: idek

Answer:

(a) To calculate the energy in electron volts of an electron with a de Broglie wavelength of 400 nm, we can use the de Broglie wavelength equation:

λ = h / p

where λ is the de Broglie wavelength, h is Planck's constant (6.626 x 10^-34 J s), and p is the momentum of the particle. We can rearrange this equation to solve for the momentum:

p = h / λ

Plugging in the given de Broglie wavelength, we get:

p = (6.626 x 10^-34 J s) / (400 x 10^-9 m)

= 1.6565 x 10^-24 kg m/s

To calculate the kinetic energy of the electron, we can use the formula:

KE = p^2 / (2m)

where m is the mass of the electron (9.109 x 10^-31 kg). Plugging in the momentum we just calculated, we get:

KE = (1.6565 x 10^-24 kg m/s)^2 / (2 x 9.109 x 10^-31 kg)

= 1.423 x 10^-17 J

Finally, we can convert this energy from joules to electron volts (eV) using the conversion factor 1 eV = 1.602 x 10^-19 J:

KE = 1.423 x 10^-17 J / (1.602 x 10^-19 J/eV)

= 88.8 eV

Therefore, the energy in electron volts of an electron with a de Broglie wavelength of 400 nm is 88.8 eV.

(b) To calculate the energy in electron volts of a photon with a wavelength of 400 nm, we can use the formula:

E = hc / λ

where E is the energy of the photon, h is Planck's constant, c is the speed of light (299,792,458 m/s), and λ is the wavelength of the photon. Plugging in the given wavelength, we get:

E = (6.626 x 10^-34 J s) x (299,792,458 m/s) / (400 x 10^-9 m)

= 4.965 x 10^-19 J

Finally, we can convert this energy from joules to electron volts using the conversion factor 1 eV = 1.602 x 10^-19 J:

E = 4.965 x 10^-19 J / (1.602 x 10^-19 J/eV)

= 3.10 eV

Therefore, the energy in electron volts of a photon with a wavelength of 400 nm is 3.10 eV.

Explanation:

Answer:

I think Fgrav=mg

Explanation:

The magnitude of the force acting on the roller coaster car (or passenger) can be calculated using the formula FGRAV=m.g, where the acceleration due to gravity is represented by g (where g=9.8 m/s2).

The magnitude of the normal force depends on three factors—

Sand and salt and water will be separated by decanting. The student's best option for separating the mixture is to leave the sand in the original container.

The salt will be left behind as a solid even if you boil or evaporate the water. Distillation is an option if you wish to collect the water. Salt has a far greater boiling point than water, which explains why this is effective.

Filtration. Filtration is among the most straightforward techniques for separating mixtures. Filtration is simple if one component is a liquid and the other is a solid. In this case, the mixture can simply be poured through filter paper.

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Answer:

All rocks are made of minerals.

Explanation:

Answer:

all rocks are made out of minerals

The waveform of a signal is the shape of its graph as a function of time in the domains of electronics, acoustics, and allied sciences, regardless of its time and magnitude scales or any shift in time.  

Thus, Waveforms with periodic variations are those that recur consistently at set intervals.

The phrase is typically used in electronics to describe periodically changing voltages, currents, or electromagnetic fields. It is typically used in acoustics to describe constant periodic sounds caused by changes in air pressure or other media.

In these situations, the signal's frequency, amplitude, or phase shift have no bearing on the waveform, which is a characteristic. Additionally, non-periodic signals like chirps and pulses can be referred to by this name.

Thus, The waveform of a signal is the shape of its graph as a function of time in the domains of electronics, acoustics, and allied sciences, regardless of its time and magnitude scales or any shift in time.  

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Option C. The heat absorbed or lost by a substance while it's changing state  correctly describes latent heat

Latent heat is the heat absorbed or lost by a substance while it is changing state.

The latent heat is a type of heat that is transferred during phase change, i.e., while a substance undergoes a change of state.

For example, when ice melts into liquid water, or when liquid water evaporates into water vapor, heat is absorbed from the surroundings.

Latent heat is not associated with a temperature change; rather, it's associated with a change of state.

For instance, the temperature of water remains at 100°C while boiling.

When water is boiling, the latent heat of vaporization is absorbed and utilized to break the hydrogen bonds holding water molecules together to change water from the liquid phase to the gaseous phase.

When the water is boiling, adding more heat won't increase the water's temperature, instead, the extra heat will be absorbed to change the phase of water molecules.

Therefore, the correct answer to the given question is option C: The heat absorbed or lost by a substance while it is changing state.

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Answer:

I'm pretty sure its helium

Answer:

13.33m/s

Explanation:

The average velocity is the ratio of total distance traveled to the total time taken to complete the distance. The International System of Units (SI) unit of velocity is the meter per second (m/s). The Velocity is given by the equation:

Velocity = total distance traveled / total time taken

The total distance traveled = Distance traveled by horse + distance traveled by truck + remaining distance traveled = 100 m + 500 m + 1000 m = 1600 m

Total time taken = 120 s

Velocity = total distance traveled / total time taken = 1600 m / 120 s = 13.33 m/s

Velocity = 13.33 m/s

Answer:

1.7x10^-10 N

Explanation:

F = G [(m_1)(m_2)]/(r^2)

F = force

G = Gravitational constant 6.67433x10^-11 (N*m^2)/kg^2

m_1 = mass first object

m_2 = mass second object

r = radius between the 2 objects

F = G[(2 kg*2 kg)/(1.25 m)^2]

F = 1.7x10^-10 N

Answer:

Photovoltaic detection is a technique that converts light into electrical energy. It is a process that involves the use of a photovoltaic cell, which is made up of semiconductor materials, to generate an electric current when exposed to light.

The photovoltaic cell absorbs the photons of light, which then knock electrons out of their orbits, creating a flow of electricity. The amount of electricity produced is proportional to the intensity of the light. The photovoltaic cell is commonly used in solar panels to generate electricity from sunlight. The efficiency of the photovoltaic cell is dependent on several factors, including the type of semiconductor material used, the purity of the material, and the thickness of the cell.

The photovoltaic cell has many applications, including in solar power generation, telecommunications, and remote sensing. The technique of photovoltaic detection is an important area of research, as it has the potential to provide a clean and renewable source of energy that can help mitigate climate change.

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