Which two options describe physical properties of matter?

A. Whether a substance floats or sinks in water
B. Whether a substance tarnishes
C. The ability of a substance to combine with other substances
D. The temperature at which a substance boils
E. Whether a substance can be burned​

Answer:

wouldn't they be dead and there's no oxygen in space....right???

Answer:

no gravity and no oxygen

Explanation:

the bird would die of lack of oxygen before they're even able to fly, but they can't fly anyway because there's no gravity so they'd just float

Answer: This form of energy is called Chemical Energy. Hope this helped!

The intensity on a screen 20 ft from the light will be 0.125-foot candles.

Distance is a numerical representation of the length between two objects or locations.

The intensity I of light varies inversely as the square of the distance D from the source;

I∝(1/D²)

The ratio of the intensity of the two cases;

\(\rm \frac{I_1}{I_2} =(\frac{D_2}{D_1} )^2\\\\ \rm \frac{2}{I_2} =(\frac{20}{5} )^2\\\\ \frac{2}{I_2} =4^2 \\\\ I_2= \frac{2}{16} \\\\ I_2= 0.125 \ foot-candles\)

Hence, the intensity on a screen 20 ft from the light will be 0.125 foot-candles

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Answer:

Bears are consumers

Explanation:

The above statement shows that bears are consumers. A consumer is an individual or a party who plans to order or use acquired goods,

A consumer is a person or a group who plans to order or utilize acquired goods, products, or services for personal, social, family, domestic, or similar purposes.

Any individual or group who is the final user of a product or service is referred to as a consumer.

A business that purchases a printer for internal usage. The firm that bought the printer is the client, and the employees that use it are the customers. The printer will not be resold by the firm.

Hence the statement shows that bears are consumers.

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Equipment such as chafing dishes, steam tables and heated cabinets designed to hold foods hot should at least keep food temperatures at 140°F (60°C) or hotter. The correct answer is 140°F (60°C).

Food safety is a crucial aspect of any foodservice operation. Keeping hot correct food temperatures is essential in preventing the growth of harmful bacteria. The temperature range of 140°F (60°C) to 165°F (74°C) is considered the "danger zone" for hot foods, as this range allows bacteria to grow rapidly.

Therefore, equipment such as chafing dishes, steam tables, and heated cabinets designed to hold hot foods should maintain a minimum temperature of 140°F (60°C) or hotter.

This ensures that the food remains safe to eat and reduces the risk of foodborne illness. It is also important to check the temperature of the food regularly using a thermometer to ensure that it is being held at the correct temperature.

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Sensing systems incorporated into harvesting machines that register and record amounts of harvests associated with specific portions of a planted field are called monitoring systems.

Monitoring systems in harvesting machines use sensing technologies to collect data on the quantity and quality of crops being harvested. These systems typically consist of sensors that measure various physical parameters, such as weight, moisture content, and color, which are then processed and analyzed to provide information on crop yield and quality.

By using monitoring systems, farmers and agricultural managers can obtain real-time information on crop performance, identify areas of the field with higher or lower yields, and make more informed decisions regarding irrigation, fertilization, and other cultivation practices.

This data can also be used to optimize the use of resources, reduce waste, and increase profitability. Overall, monitoring systems play an important role in precision agriculture, which aims to improve the efficiency and sustainability of agricultural practices.

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The formula that is dimensionally consistent with an expression yielding a value for velocity is v = x/t.

This formula relates velocity (v), distance (x), and time (t) in a way that is consistent with the dimensions of each variable. Velocity is measured in units of distance per time (e.g., meters per second), so it makes sense that the formula for velocity would involve dividing distance by time.

In contrast, the other variables in the question (a for acceleration and t for time) do not have the same dimensions as velocity.

Acceleration is measured in units of distance per time squared (e.g., meters per second squared), so it would not be dimensionally consistent to use acceleration in a formula for velocity. Similarly, time is measured in units of time (e.g., seconds), so it would not be dimensionally consistent to use time alone in a formula for velocity.

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The following question is about football movement and can be answered by using the equations of projectile launch :

Initial speed is: v = 16.89 m / s

Maximum height is:  y = 14.26m

Given parameters

Horizontal distance x = 28.4 m

Launch angle tea = 38.6º

To find,

The initial speed and the maximum height

         R =  \(v^{2}\)sin2θ/g

    \(v^{2}\)=  g*r/sin2θ

calculating,

         v² = 9.8 *28.4 / sin (2 *38.6)

               =\(\sqrt{278.32/0.9751}\)

                 v = 16.89 m / s

The vertical speed is zero when height maximum.

         v² = v² - 2 g y

         0 = v² - 2g y

         y =   v²/2g

        y = 14.26m

Initial speed is: v = 16.89 m / s

Maximum height is:  y = 14.26m

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At a depth of approximately 5.27 mm in the powder bed, the pressure in the cylinder will be 4/10 the pressure at the punch.

To calculate the depth at which the pressure in a straight cylinder compact with a diameter of 15 mm will be 4/10 the pressure at the punch, we can use the Kawakita equation, which relates the pressure at any depth in the powder bed to the pressure at the punch.

The equation is given by: P/P0 = (1 - \(e^{(-kh)}\)) / (kh), where P0 is the pressure at the punch, P is the pressure at a depth h in the powder bed, and k is the Kawakita constant.

Substituting k = 0.4 and P/P0 = 4/10, we get: 0.4h / (1 - \(e^{(-0.4h)}\)) = 0.4

Solving for h numerically, we find that h ≈ 5.27 mm. Therefore, at a depth of approximately 5.27 mm in the powder bed, the pressure in the cylinder will be 4/10 the pressure at the punch.

This result indicates that the powder bed is relatively dense and that the compaction process has been effective in reducing the void space between particles.

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Moving from the element with atomic number 10 to atomic number 11 on the periodic table changes observed are :

Reactivity increases,

Sodium has more shell,

Valence electrons in sodium are farther from the nucleus,

Atomic number 11 does not have a full electron shell

In increasing order of atomic number, the elements are listed. The amount of protons in an atom's nucleus is indicated by its atomic number. An element's identity is determined by its proton count. The number of protons determines an element's identity.

The indirect relativistic effect amplifies the decreases in the binding energies of the valence d and f electrons as they move down the periodic table. As a result, the d electrons in the heavier coinage metals become more chemically active, leading to higher oxidation states in these elements.

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Answer:

potential energy

the cat is at reast not moving the energy inside of it could move tho

A physical influence known as force causes an object to accelerate in the direction from which it is applied. The force needed to lift 10 kg weight could be calculated by the equation  F = m x g. It is equal to 100 N if gravitational acceleration is taken as 10 m/s².

Step 1: Using the information provided:

It takes 10 kg to raise an object with mass (m).

Second step: formula used

Where F is force, F = m g.

The object's mass is given by m.

The value of g is taken to be 10 m/s2, which is the acceleration caused by gravity.

Compute the force necessary to raise an object in step 3:

By changing the variables in the calculation above,

we obtain F = 10 x 10 F = 100 N.

As a result, 100N of force is needed to raise an object weighing 10 kg.

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Answer:

i think the answer is 1000 kg but i might be wrong

Work = 540 joules is the amount of work that was done on the item by this force.

The amount of work a force can produce relies on the force, the body's displacement, and the angle between the two. When displacement is in the force's direction, the most work is produced.

Newton's second law provides a precise explanation of the modifications that a force can make to a body's motion. According to this, a body's momentum changes at a rate that is equal to the force acting on it over time in both magnitude and direction.

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The formula that can be used to solve for a missing magnification is M = D1/D2, which is derived from the equation

(D1M1 = D2M2).

The equation (D1M1 = D2M2) can also be rearranged to solve for a missing magnification.

Magnification formula: The magnification formula can be written as

M = m′/m

= -di/do

Where, m' is the height of the image formed, m is the height of the object placed, di is the distance of the image from the lens, and do is the distance of the object from the lens.

A formula that solves for a missing magnification can be written as M = D1/D2, where D1 and D2 are the distances of the object from the lens and the distance of the image from the lens respectively.

The conclusion can be drawn as the formula that can be used to solve for a missing magnification is M = D1/D2, which is derived from the equation

(D1M1 = D2M2).

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a point on the circumference travel if the wheel is rotated through angles of 30 rad is 7.8m

4.9 x \(10^{7}\) revolutions  if the car travels 80000 km.

The Radius of the tyre = 0.26 m.

Perimeter = 2\(\pi r\) =0.52\(\pi\)m

When the circle is rotated through an 30rad angle, a point of its circumference travels a distance equal to an 30rad arc of this circle.

a full revolution is 2π rad, then an 30rad angle represents

30/2\(\pi\) =15/\(\pi\)

15/\(\pi\) * .52 \(\pi\) = 7.8 m

d =  7.8 m.

the car travels 80000 km

revolutions do the tires = 80000 * \(10^{3}\)/ 0.52\(\pi\)

=4.9 x \(10^{7}\) revolutions.

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Answer:

The correct option is;

Sun, planets, moons, asteroids, comets

Explanation:

The Solar System consists of the system of celestial bodies bound gravitationally to the Sun, which includes the 8 regular planets, 2 dwarf planets, 796, 354 known minor planets, 4,143 comets, moons, which are natural satellites, an asteroid belt, which consists of a belt of rock and metal containing celestial bodies moving in a belt round the Sun

Answer:

8

Explanation:

All noble gasses have 8 electrons in their outer shell

Answer:

2 1/4

Explanation:

Answer:

\({ \rm{ = \frac{1}{2} ( - 1 \frac{3}{4} - ( - 2 \frac{1}{2})) }} \\ \\ = { \rm{ \frac{1}{2} ( \frac{3}{4}) }} \\ \\ = { \rm{ \frac{3}{8} }}\)

Answer:

I believe is is A because that is what google says

Answer:

Explanation: "Warming up and cooling down are good for your exercise performance — you’ll do better, faster, stronger — and for your heart since the increased work on the heart ‘steps up’ with exercise,” said Richard Stein, M.D., professor of cardiology.

If Jason wants to conserve energy, he could ride the bus to and from work.

The law of Conservation of energy states that energy cannot be created nor destroyed but can be changed from one form to another.

There is no net change in conserving energy.

Thus, Jason conserves energy by riding the bus to and from work.

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Option d, 1.12 x \(10^{-19}\)J is the energy of a photon of light if the wavelength of the light wave is 4.65 x \(10^{-7}\)m.

Energy (E) of a photon of light is given by the formula:

E=hf

where, h = Planck's constant and f = frequency of light. But, we are given the wavelength of light, λ = 4.65 x \(10^{-7}\)m.

So, we know that

c = fλ

where, c is the speed of light in a vacuum. Rearranging this formula to solve for f,

f = c/λ

Putting this into the energy formula gives:

E = hf = hc/λ

We know that Planck's constant is h = 6.626 x \(10^{-34}\)J.s and the speed of light in a vacuum is c = 3.00 x \(10^{8}\)m/s. So,

E = hc/λ = (6.626 x \(10^{-34}\)J.s)(3.00 x \(10^{8}\)m/s)/(4.65 x \(10^{-7}\)m) = 4.28 x \(10^{-19}\)J

Therefore, the energy of a photon of light if the wavelength of the light wave is 4.65 x \(10^{-7}\)m is 4.28 x \(10^{-19}\)J which is option d.

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Answer:

  f = 409.6 Hz,  the woman hears a higher frequency sound

Explanation:

This is a Doppler effect problem, which is described by the equation for the case of a fixed observer

          f = fo \(\frac{v}{v \pm v_s}\)

where the negative sign is for the source approaching the observer

in this case the car is the one that emits the sound and moves away from the intersection

let's calculate

          f = 400  \(\frac{343}{343-8}\)

          f = 409.6 Hz

therefore the woman hears a higher frequency sound

We cannot determine the change in resistance due to a change in temperature.

The temperature coefficient of resistivity (alpha) of a substance measures how its resistivity changes with temperature. The formula for finding the change in resistance of a conductor due to a change in temperature is:ATR=alpha * R * ATT

where R is the original resistance of the conductor, ATT is the change in temperature, and ATR is the change in resistance. So, ATR = alpha * R * ATT

For a conductor made of a material whose temperature coefficient of resistivity is 3.810° rap, the change in resistance when the temperature rises by ATTT degrees Celsius is given by:ATR = (3.810 × 10⁻³⁰/°C) × R × ATTTwhere R is the original resistance of the conductor.The problem does not give us the original resistance of the conductor.

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Shenna has recorded the property of cleavage. Cleavage refers to the tendency of a mineral to break along flat, smooth planes due to its internal structure.structure.So,The correct option would be (A) Cleavage.

Cleavage is a property that describes how a mineral breaks along planes of weakness, resulting in smooth, flat surfaces. It is one of the key characteristics used to identify and classify minerals.

In the given observations, Shenna noted that the mineral sample called "Mica" breaks into thin sheets. This characteristic indicates that Mica exhibits cleavage. When Mica is subjected to stress or force, it breaks along flat planes, resulting in thin, sheet-like fragments.

On the other hand, Shenna described the mineral sample called "Pyrite" as having cubic crystals. While this information is valuable for identifying Pyrite, it does not pertain directly to the property of cleavage.

Shenna has recorded the property of cleavage based on his observation that the mineral sample called "Mica" breaks into thin sheets.sheets.Hence the correct answer is Cleavage. Cleavage refers to the tendency of a mineral to break along flat, smooth planes due to its internal structure.

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In a photovoltaic system, an inverter is required to connect the DC current of the solar panel to the AC current of an electrical grid. The correct option is B.

The solar panels in a photovoltaic system generate DC (direct current) electricity. However, most electrical grids operate on AC (alternating current) electricity.

The role of the inverter is to convert the DC electricity produced by the solar panels into AC electricity that can be fed into the electrical grid or used to power electrical devices.

The inverter performs the important function of converting the type of current to match the requirements of the grid, enabling the efficient utilization of solar energy and facilitating the integration of solar power systems with the existing electrical infrastructure.

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Answer:

The moon rotates around the earth but the earth revolves around its own axis

Explanation:

The cyclic frequency of the resulting motion is 1.438 Hz. when  the acceleration due to gravity is 9.8 m/s 2. Because the mass possesses kinetic energy at the static equilibrium displacement, which is translated into potential energy stored in the spring at the extremes of its journey, oscillations happen.

Given:
Force constant of the spring = k
Displacement from equilibrium point = 21.9 cm
Displacement from equilibrium point during oscillation = 8.1 cm
Acceleration due to gravity = 9.8 m/s²Formula used:
The frequency of oscillation is given by the formula f = 1/2π √(k/m)
where k is the force constant of the spring and m is the mass of the object.

In this case, we do not have the mass of the weight, but we can assume that the weight is the only object oscillating, and therefore its mass will be considered as m. If the weight is denoted by w, then its mass will be w/g, where g is the acceleration due to gravity.

Therefore,
m = w/g

Displacement during oscillation = 8.1 cm
= 0.081 m
The maximum extension of the spring from the equilibrium point during the oscillation will be the sum of the equilibrium position and the displacement from the equilibrium point during oscillation, i.e.
y = 21.9 cm + 8.1 cm
= 30 cm
= 0.3 m

Frequency of oscillation f

1/2π √(k/m)
Substituting m = w/g, we get
f = 1/2π √(k/(w/g))
f = 1/2π √(kg/w)
Now we will calculate k.
k = mg/y
where m is the mass of the weight, g is the acceleration due to gravity, and y is the maximum extension of the spring from the equilibrium point during the oscillation.
Substituting values, we get
k = (w/g)(9.8 m/s²)/(0.3 m)
k = 32.67w/g
Substituting this value in the equation for frequency, we get
f = 1/2π √(32.67w/gw)
f = 1/2π √(32.67/g)
f = 1.438 Hz

Therefore, the cyclic frequency of the resulting motion is 1.438 Hz.

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Answer:

The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting point.

∙ The tin and lead alloy is a eutectic composition (low melting point composition) consisting of 62% tin plus 38% lead.

∙ Melting point of this alloy is 183 ^C

Explanation: