A plane flying horizontally at a speed of 50m/s and at an elevation of 160m drops a package, and 2. 0 s later it drops a second package. How far apart will the two packages land on the ground if air resistance is negligible?

Answer:

The answer is "Option D"

Explanation:

Please find the graph file in the attached file.

Using formula:

\(\to v= \rho \lambda \\\\\ \to \lambda= 130 \cm \\\\ \to v= 335 \frac{cm}{s}\\\\ \to \rho= \frac{v}{\lambda} \\\\\)

      \(=\frac{335}{130} \\\\ = 2.57 \approx 2.50 \ Hz\)

The right end of the conductor will be positive.

What is charging by conduction ?

The charging by induction process is where the charged particle is held near an uncharged conductive material that is grounded on a neutrally charged material. The charge flows between two objects and the uncharged conductive material develop a charge with opposite polarity.

When an uncharged object is placed very close to a charged conductor without touching, the nearer end acquires a charge opposite to the charge on the charged conductors and the two bodies attract. This is called charging by induction. The net charge on the bodies remains the same and body is charged until they are kept close or brought in contact.  

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Answer:

the surface of the earth would've already turned into a very hot liquid water to even exist and there would be no existence of humans on earth

Answer:

It would take the cyclist 2 hours to cycle to school.

Explanation:

5km/hr for 2 hours would be 10km.

When a refrigerant is compressed and condensed, it condenses back into a liquid, giving up heat to the outside air (option A)

Condensation is the process by which a gas or vapor transitions into a liquid. This occurs when the temperature of the gas or vapor is cooled to the point where its molecules lose energy and move closer together, allowing them to bond and form a liquid.

For example, when water vapor in the air is cooled, it can condense into liquid water droplets on a cold surface such as a window or a cold drink. Similarly, when a refrigerant gas is compressed and cooled in a condenser, it can condense into a liquid state.

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Answer:

True

Explanation:

Atoms of the same element will always have the same atomic mass or the mass listed in the periodic table.

Answer:

A an interaction between organisms

Explanation:

Symbiosis is an interaction between two or more organisms. It is a biological interaction which can be mutualism, commensalism or parasitic.

Symbiosis simply entails the interactions between organisms.

Answer:

when you think back on something or reconsider something you have done.

Answer: I hope you find it useful

Explanation: Group 2 elements have two valence electrons. The two valence electrons are easily lost in the formation of chemical bonds. Once the two electrons are lost, the atom then has a full outer shell and is therefore more stable.

so,  if an atom has valency 2 , then it means that the atom can combine with 2 other atoms .

Answer:The stones will be at the same height of 62.59 feets 4.4 seconds later.

Explanation:

There  are approximately 2.01 x 10^18 photons of light with a wavelength of 4000 Å in 1 J of energy.

To determine the number of photons of light having a wavelength of 4000 Å, we can use the formula:

E = h * c / λ

where E is the energy of a photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the light.

First, we need to convert the wavelength from angstroms (Å) to meters (m):

4000 Å = 4000 × 10^-10 m

Plugging in the values for h, c, and λ, we get:

E = (6.626 x 10^-34 J s) * (2.998 x 10^8 m/s) / (4000 x 10^-10 m) = 4.97 x 10^-19 J

The energy of a photon is also related to its frequency (ν) by the equation:

E = h * ν

where ν is the frequency of the light. We can rearrange this equation to solve for the frequency:

ν = E / h

Plugging in the energy value we just calculated, we get:

ν = 4.97 x 10^-19 J / 6.626 x 10^-34 J s = 7.50 x 10^14 Hz

Now, we can use the formula for the energy of a photon to calculate the number of photons in a given amount of energy. If we have a total energy of E_total, the number of photons (N) is given by:

N = E_total / E

Let's assume that we have 1 J of energy. Then, the number of photons with a wavelength of 4000 Å would be:

N = 1 J / 4.97 x 10^-19 J = 2.01 x 10^18 photons

Therefore, there are approximately 2.01 x 10^18 photons of light with a wavelength of 4000 Å in 1 J of energy.

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Answer:

G = 6.67

Explanation:

Option C is Correct. All three blocks experience the same buoyant force because buoyant force is determined by the volume of the object submerged and the density of the fluid it is submerged in, not the density of the object itself.

The term "buoyancy" refers to the upward force that is produced when an object is displaced by water.

According to Archimedes' principle, it is directly proportionate to the volume (weight) of water being displaced by an object.

As a thing moves more water, the force of buoyancy pushing it upward increases.

The formula gives the buoyancy of an object;

Fb=pgv

Where Fb represents the force of buoyancy that a liquid applies to an object.

g is the gravitationally induced acceleration, and p is the density of the liquid.

V is the volume of the liquid after displacement.

h is the amount of water a piece of equipment has transported.

A is the surface area of the floating object.

The buoyancy scale uses the Newton (N) unit of measurement.

The ice block, which receives the same buoyant force as the other two, has the same volume as the concrete and iron blocks, while having densities that are far more than the fluid's density.

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Potential energy is the power that a thing possesses as a result of where it is in relation to other objects.

The earth can pull you down through the force of gravity while doing work in the process, being at the top of a stairwell gives you more potential energy than standing at the bottom.

Two magnets have more potential energy when they are held apart than when they are near to one another. They will migrate near each other and begin working if you let them go.

The force acting on the two objects affects the potential energy formula. P.E. = mgh, where m is the mass in kilograms and g is the acceleration due to gravity, is the formula for gravitational force.

Therefore, Potential energy is the power that a thing possesses as a result of where it is in relation to other objects.

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The three pieces of equipment that might be used in the optic experiments carried to develop microlasers are (1) laser source, (2) optical fibers, and (3) lenses.

1. Laser Source: A laser source is a crucial piece of equipment in optic experiments for developing microlasers. It provides a coherent and intense beam of light that is essential for the operation of microlasers. The laser source emits light of a specific wavelength, which can be tailored to suit the requirements of the microlaser design.

2. Optical Fibers: Optical fibers play a vital role in guiding and transmitting light in optic experiments. They are used to deliver the laser beam from the source to the microlaser setup. Optical fibers offer low loss and high transmission efficiency, ensuring that the light reaches the desired location with minimal loss and distortion.

3. Lenses: Lenses are used to focus and manipulate light in optic experiments. They can be used to shape the laser beam, control its divergence, or focus it onto specific regions within the microlaser setup. Lenses enable precise control over the light path and help optimize the performance of microlasers.

These three pieces of equipment, namely the laser source, optical fibers, and lenses, form the foundation for conducting optic experiments aimed at developing microlasers. Each component plays a unique role in generating, guiding, and manipulating light, ultimately contributing to the successful development and characterization of microlasers.

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Answer:

Explanation:

The quantity of energy transferred by a force when it is applied to a body and causes that body to move in the direction of the force work.

The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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Answer:

The time taken for the commercial Jet liner to reach the end of its runway is 10.18 s.

Explanation:

Given;

average acceleration of the commercial Jet liner, a = 3g = 3 x 9.8 m/s² = 29.4 m/s²

distance traveled by the commercial Jet liner, s = 1542 m

The time taken for the commercial Jet liner to reach the end of its runway is calculated as follows;

s = ut + ¹/₂at²

where;

u is the initial velocity of the commercial Jet liner = 0

s = 0 + ¹/₂at²

s = ¹/₂at²

2s = at²

\(t = \sqrt{\frac{2s}{a} } \\\\t = \sqrt{\frac{2 \times 1524}{29.4} } \\\\t = 10.18 \ s\)

Therefore, the time taken for the commercial Jet liner to reach the end of its runway is 10.18 s.

Answer:

The answer is C.

Answer: Bunsen Burner

Explanation:

A Bunsen burner is a gas-powered laboratory appliance used to heat substances. The correct answer is the Bunsen burner.

It is made comprised of a metal tube that is connected to a gas source, allowing for regulated gas combustion to create a flame.

For various scientific uses, such as heating test tubes, boiling liquids, or doing experiments that need regulated heating, the flame created by a Bunsen burner can be adjusted to offer varied levels of heat intensity.

Chemistry labs frequently contain bunsen burners, which are necessary equipment for many chemical investigations and operations.

Therefore, A Bunsen burner is a gas-powered laboratory appliance used to heat substances. The correct answer is the Bunsen burner.

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The complete question is:

What is a device used to heat chemicals which is powered by gas?

The potential energy of the crate with respect to the ground is 3×10⁴ J, and the mass of the crate is 153.1 kg.

This is the energy of a body by virtue of it position in the gravitationla field.

The potential energy of the crate with respect to the ground is the same as the amount of work needed to lift the crate to a height of 20m.

From the question,

Also,

To caluclate the mass of the crate, we use the formula below.

Formula:

Where:

From the question,

Given:

SUbstitute these values into equation 1

Hence, the Potential energy and the mass of the crate is 3×10⁴ J

and 153.1 kg respectively.

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Answer:

no3. is is the first bubble answer, no4. is the middle answer

Explanation:

A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal.

A chemical link known as a covalent bond includes the exchanging of electrons between atoms to create electron pairs. These electron couples are referred to as bonding pairs or sharing pairs. Covalent bonding is the stable equilibrium of attracting and repulsive forces that exists when two atoms share an electron.

The equal sharing of electrons from the two participating atoms creates a covalent connection. The electron pair involved in this kind of bonding is known as the shared pair or bonding pair. Covalent bonds can also be referred to as molecular bonds.

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The weight of the water is 2.05 × 10⁹ N

Weight = mass × gravity

Weight = 2.05 × 10⁸ ×10

Weight = 2.05 × 10⁹ N

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Answer:

Volume = 112cm^2

Density = 0.45 g/cm^2 (2.s.f)

Explanation:

Volume of a cube is found by multiplying its height by its length by its width.

We are given the values: l = 7cm, w = 8cm, h = 2cm, so to find the volume we just need to multiply them all together:

V=lwh

V = (7)(8)(2)

The volume of the cube = 112cm^2

Density is found by dividing mass by volume.

We are given the mass (50 grams) and we have just found the Volume (112cm^2), so we can just divide them to find the density:

p (symbol for density) = m/v

p = (50)(112)

The density of the cube is 0.45 g/cm^2 (2.s.f.)

Hope this helped!

Hello jamaicandoll!

\( \huge \boxed{\mathfrak{Question} \downarrow}\)

What is the force on a body if the mass of the body is 2300g? (acceleration due to gravity = - 9.8m/s²) .

\( \huge \boxed{\mathfrak{Answer} \downarrow}\)

Given,

We know that, force = mass × acceleration.

So,

F = ma

F = 2.3 × -9.8

F = \(\boxed{\underline{\bf \: -22.54\:N}}\)

__________________

Hope it'll help you!

ℓu¢αzz ッ

with 13.06 meters per second minimum speed, car traverse the loop so that the rider does not fall out while upside down at the top.

What is centripetal force?

A net force called a centripetal force keeps an object moving in a circle by acting on it.

Given,

Radius of Loop, r = 13.2 m

without the strap, roller coaster must have complete the loop.

At highest point

weight will provide centripetal force just to complete the loop

Thus mg = mv²/r

where v = minimum velocity possessed by roller coaster in order to cover the loop

v =  \(\sqrt{gr}\)

v = \(\sqrt{9.8 X 13.2}\)

v = \(\sqrt{129.36}\) = 13.06 m

Therefore, with 13.06 meters per second minimum speed, car traverse the loop so that the rider does not fall out while upside down at the top.

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With 13.06 meters per second minimum speed, car traverse the loop so that the rider does not fall out while upside down at the top.

What is centripetal force?

A net force called a centripetal force keeps an object moving in a circle by acting on it.

Given,

Radius of Loop, r = 13.2 m

without the strap, roller coaster must have complete the loop.

At highest point

weight will provide centripetal force just to complete the loop

Thus mg = mv²/r

where v = minimum velocity possessed by roller coaster in order to cover the loop

v =  √9r

v = √9.8×13.2

v = √129.36 = 13.06 m

Therefore, with 13.06 meters per second minimum speed, car traverse the loop so that the rider does not fall out while upside down at the top.

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The change in the kinetic energy of the monster truck during the time is 507500 J and the right option is B). 507500

Kinetic energy is the energy of a body due to its motion.

To calculate the increase in the kinetic energy of the monster truck, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The increase in the kinetic energy of the monster truck during the time is 507500 J and the right option is B). 507500.
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Almost all the craters we see on the Moon circular, because the rocks and icebergs that hit the Moon are moving so fast, they explode on impact, making a circular hole. Option 4 is the correct answer.

The observed lunar deformation is much larger than scientists would expect, given the Moon's current orbit and rotation rate. Scientists believe that this extra deformation arises because the Moon “froze” its shape billions of years ago when it orbited closer to Earth and thus had much larger forces pulling on it.

Some nights, the Moon might look like a narrow crescent. Other nights, the Moon might look like a bright circle.

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Answer:

Option 4 'stabilization, strength, and power' is correct.

Explanation:

During the stabilization phase, the focus is on developing proper movement patterns and improving muscular endurance to stabilize joints and improve overall posture.

During the strength phase, the focus shifts towards building muscular strength and increasing muscle size, typically through the use of heavier weights and lower reps.

Finally, during the power phase, the focus is on developing explosive power and speed through the use of plyometrics and other high-intensity exercises.