Two iron weights, one twice the mass of the other, are dropped from the top of the building. compared with the lighter weight, the twice as heavy weight will be... ​

An easy way to encourage students to stay hydrated is to let them know hydration improves performance.

Drinking water is essential for our body system to function well. It helps in the regulation of the body temperature, the prevention of infections, as well as the delivery of nutrients to different parts of the body.

Staying hydrated is also vital in getting enough sleep and keeps the body in shape.

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Answer:

Star Y is showing radial motion

Star Y is moving toward the Earth

Explanation:

Just answered this question on a quiz and got it right.

Star Y is showing radial motion

Star Y is moving towards earth.

Spectrum is defined as the arrangement of radiations emitted by atoms or molecules based on their characteristic wavelength and frequency.

Here,

The spectrum of the star Y is given and is compared to a reference hydrogen spectrum. The range of wavelengths of the star is given. The spectrum of the star shows that the wavelengths are shifted such that from longer wavelengths to shorter wavelength. This phenomenon of shift in wavelengths from higher to lower is known as blue shift. The star shows blue shift that means shifted to shorter wavelength or it can be said as shifted from lower frequency to higher frequency. As a result, it can be concluded that the star Y is moving towards the earth which implies Star Y is showing radial motion.

Hence,

The star Y is showing radial motion.

Star Y is moving towards the earth.

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Answer:

because well I dont even know sorryy but you got this

Answer:

A. Reversibility

Explanation:

Because if you don't progress then you do the opposite, you reverse.

Sorry if my explanation is confusing it made sense in my head i just didn't know how to put it.

hope this help. ;)

Answer:

A. Reversibility

Explanation:

Answer:

\(\lambda=5.46\times 10^{-8}\ m\)

Explanation:

The hottest ordinary star in our galaxy has a surface temperature of 53,000 K.

We need to find the peak wavelength of its thermal radiation.

Using Wein's law,

\(\lambda T=2.898\times 10^{-3}\\\\\lambda=\dfrac{2.898\times 10^{-3}}{53000}\\\\=5.46\times 10^{-8}\ m\)

So, the peak wavelength of its thermal radiation is equal to \(5.46\times 10^{-8}\ m\).

Answer:

what

Explanation:

what I dont get it??

Answer:

that makes me confused I don't think of pizza the same again LOL

The time elapsed between the first splash and the second splash is approximately 0.69 seconds.

To calculate this, we consider the motion of two rocks thrown simultaneously from a bridge. Heather throws a rock straight down with a speed of 14 m/s, while Jerry throws a rock straight up with the same speed.

We use the equation for displacement in uniformly accelerated motion: s = ut + (1/2)at^2.

For Heather's rock, which is thrown downwards, the initial velocity (u) is positive and the acceleration (a) due to gravity is negative (-9.8 m/s^2). The displacement (s) is the height of the bridge (46 m).

Solving the equation, we find two possible values for the time (t): t ≈ -4.91 s and t ≈ 1.91 s.

Since time cannot be negative in this context, we discard the negative value and consider t ≈ 1.91 s as the time it takes for Heather's rock to hit the water.

For Jerry's rock, thrown upwards, we use the same equation with the same initial velocity and acceleration. The displacement is also the height of the bridge, but negative.

Solving the equation, we find t ≈ -5.68 s and t ≈ 1.22 s. Again, we discard the negative value and consider t ≈ 1.22 s as the time it takes for Jerry's rock to reach its maximum height before falling back down.

To find the time difference between the first and second splash, we subtract t ≈ 1.91 s (Heather's rock) from t ≈ 1.22 s (Jerry's rock). This gives us a time difference of approximately 0.69 seconds.

Therefore, the time elapsed between the first splash and the second splash is approximately 0.69 seconds.

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Answer:

huh

Explanation:

Answer: 0 m/s. that is your answer i hope this help sorry if i am wrong

Explanation:

What does the area under the curve on a velocity-versus-time graph represent? ... then slows down to travel the last 40 miles in three hours. ... 20. A bicyclist travels the first 700 m of a trip at an average speed of 8 m/s, travels the ... to complete the trip at an average speed, for the entire trip of 440 km/h. ... 125) v1= 0 m/s.

The magnitude of the action–reaction pair between the two boxes (A and B) will be "18.2 N".

According to the question,

Mass of box A,

Mass of box B,

Horizontal force,

From the Newton's law,

→ \(F_{app} = (\frac{F_{app}}{m_A+m_B} )a\)

or,

→      \(a = \frac{F_{app}}{(m_A+m_B)}\)

Bu substituting the values, we get

→         \(= \frac{100}{9+2}\)

→         \(= \frac{100}{11}\)

→         \(9.10 \ m/s^2\)

We can see that between the two boxes, the action-reaction pair exist.

then,

→ \(F_{action-reaction} = m_b \ a\)

→                          \(=2\times 9.10\)

→                          \(= 18.2 \ N\) (magnitude)

Thus the above solution is appropriate.

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The magnitude of the acceleration and its direction however depends on the resultant force.

In a system of forces, the resultant force is the force that has the same effect in magnitude and direction as all the forces acting together.

In an inclined plane, the friction, weight and applied force all act together on the object. The magnitude of the acceleration and its direction however depends on the resultant force.

This question is incomplete as the diagrams are missing hence the numerical values can not be computed.

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Hi there!

We can use the following equation to solve for gravitational acceleration for a uniform mass:
\(g = \frac{Gm}{r^2}\)

g = acceleration due to gravity (m/s²)

G = Gravitational Constant

m = mass of PLANET (kg)

r = radius (m)

Plug in the given values:
\(g = \frac{(6.67*10^{-11})(6 * 10^{24})}{(3.9*10^6)^2} = \boxed{26.31 \frac{m}{s^2}}\)

Answer:

Explanation:

Given,

F = 100 , M = 25

Now, let's find the value of A

\( \sf{F = MA}\)

plug the values

⇒\( \sf{100 = 25 A}\)

Swap the sides of the equation

⇒\( \sf{25A = 100}\)

Divide both sides of the equation by 25

⇒\( \sf{ \frac{25A}{25} = \frac{100}{25} }\)

Calculate

⇒\( \sf{A = 4}\)

Hope I helped!

Best regards!!

Given:-

To find out:-

Calculate the acceleration, a ?

Formula applied:-

F = m × a

Solution:-

We know,

\( \sf{F = m × a}\)

Substituting the values of mass and acceleration,we get

\( \sf\implies \: 100 = 25 \times a\)

\( \sf \implies a = \cancel \dfrac{100}{25} \)

\( \sf \implies a = 4 \: ms {}^{ - 1} \)

The pressure exerted on the floor by each leg is 427832.0079 Pa.

F = mg

F = (4.5 + 65) × 9.8

F= 681.1 N

This force is evenly distributed on the three leg

radius, r = d/2

= 2.6 / 2

= 1.3 cm = 0.013 m

Total cross sectional area of the three legs, A = 3×π×\(r^{2}\)

A = 3 × 3.14 × \(0.013^{2}\)

A = 0.00159 \(m^{2}\)

Pressure due to weight,

P = Weight/A

P = 681.1/ 0.00159

P = 427832.0079 Pa

Hence, the pressure exerted on the floor by each leg is 427832.0079 Pa.

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The speed of light in material B is 1.6625 × 108 m/s.

The refractive index of a material is its optical density relative to that of a vacuum.

Material B has a refractive index of nB, and its speed of light is vB.

The speed of light in material A is given as 1.25 x 108 m/s.

The refractive indices of materials A and B have a ratio of nA/nB = 1.33.

We will use the formula:

nA/nB = vB/vA = nA/nB.

Therefore, nA/nB = vB/1.25 x 108 m/s.

This equation can be rearranged to give the speed of light in material B:

vB = nA/nB × 1.25 x 108 m/s.

Therefore, vB = 1.33 × 1.25 × 108 m/s.

We will perform this calculation:

vB = 1.6625 × 108 m/s.

Therefore, the speed of light in material B is 1.6625 × 108 m/s.

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A current of a 6 flows through a light bulb for 12 s. The total charge that passes through the light bulb during the given time is 72 coulombs.

To calculate the total charge that passes through the light bulb, we need to use the formula Q = I * t, where Q represents the charge in coulombs, I represents the current in amperes, and t represents the time in seconds.

Step 1: Identify the known values:

Current (I) = 6 amperes

Time (t) = 12 seconds

Step 2: Calculate the charge using the formula:

Q = I * t

Step 3: Substitute the known values into the formula:

Q = 6 amperes * 12 seconds

Q = 72 coulombs

Therefore, the total charge that passes through the light bulb during the given time is 72 coulombs.

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Answer:

C anterior and posterior

Explanation:

c

The aforementioned statement, "Measurements must be conducted carefully to ensure that all factors—aside from the variable—are the same,” is true. Controlling for all variables besides the variable of interest is crucial when performing scientific experiments or taking measurements.

By doing so, it is possible to make sure that any observed changes or impacts are caused by the variable being monitored and not by any confounding variables.

Researchers can isolate the effects of the particular variable they are examining by maintaining the status quo for all other factors. By keeping all other conditions constant, researchers can isolate the impact of the specific variable they are studying.

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a) To determine if the car will hit the object before coming to a stop, we need to calculate the distance required to stop the car, assuming maximum braking deceleration. We can use the following formula:

d = (v^2) / (2a)

where:

d = distance required to stop

v = initial velocity

a = acceleration/deceleration

In this case, v = 100 km/h = 27.78 m/s (converted from km/h to m/s)

a = -7 m/s^2 (negative sign indicates deceleration)

We know that the car's headlights extend out to a range of 30 m, so if the distance required to stop the car is greater than 30 m, the car will hit the object before coming to a stop.

Plugging in the values to the formula, we get:

d = (27.78^2) / (2 x -7) = 108.61 m

Since 108.61 m is greater than 30 m, the car will hit the object before coming to a stop.

b) To calculate the time required to stop, we can use the following formula:

t = v / a

where:

t = time required to stop

v = initial velocity

a = acceleration/deceleration

Plugging in the values, we get:

t = 27.78 / 7 = 3.97 s

Therefore, it will take 3.97 seconds to stop the car.

The inverse of the mass is referred to as acceleration. The acceleration will be slower the more mass there is.

Acceleration is the rate of change in an object's velocity over time in mechanics. One of the vector quantities is speed. The direction of the net force exerted on an object is what determines its acceleration. The change in velocity rate is referred to as acceleration. Usually, but not always, acceleration implies a change in velocity.

A circular object moving at a constant velocity is still accelerating because its velocity is changing in the opposite direction. In physics, acceleration is the rate of change in an object's velocity over time.  According to Newton's second law, the sum of all forces acting on an object determines its acceleration. Meters per second (ms²) is the SI unit for acceleration.

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The thing that happens to the speed of light when it passes from a medium of low index of refraction  into a medium of high index of refraction is that it tend to speed up.

Light moves more quickly when it enters a medium with a lower refractive index, as air from water. The light deviates from the straight line. Light will move more slowly and obliquely as it penetrates a substance with a higher refractive index.

The speed of light increases with decreasing refractive index. The lesser refractive index belongs to medium A. When moving at a speed equal to the speed of light divided by the refractive index, light will move more quickly through medium A.

Hence, Light bends in the direction of the normal as it passes through an interface into a medium with a greater index of refraction. On the other hand, light bending away from an interface from higher n to lower n.

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The statement "Something established by authority as a rule for measurement is called a standard unit" is True.

Something established by authority as a rule for measurement is called a standard unit. Standard units provide a consistent and universally accepted basis for measuring quantities in various fields such as science, engineering, and commerce.

Standard units are essential because they ensure consistency and accuracy in measurements across different contexts and locations. They serve as a reference point for comparing and quantifying physical quantities. By establishing standardized units, authorities promote uniformity and facilitate effective communication and collaboration in scientific research, technological advancements, and global trade.

In the International System of Units (SI), which is the most widely used system of measurement, there are seven base units: meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity). These base units are defined based on fundamental physical constants or natural phenomena, providing a reliable and reproducible foundation for measurement.

Standard units are typically defined and maintained by internationally recognized organizations like the International Bureau of Weights and Measures (BIPM) to ensure global consistency. These organizations establish precise definitions, measurement protocols, and calibration procedures for standard units, often using advanced scientific techniques and technologies.

The use of standard units simplifies scientific research, enables accurate engineering designs, ensures fair trade practices, and facilitates international cooperation. It allows for the seamless exchange of information and data, promotes quality assurance, and supports the development of common standards and regulations in various industries.

In summary, a standard unit is a measurement rule established by authority to provide a consistent and universally accepted reference for quantifying physical quantities. It is a fundamental aspect of scientific progress, technological advancements, and global collaboration.

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Answer:

6

Explanation: i looked this up.

According to the Coloumb's law, the force is obtained from the charges and the distance between them is 8.4375×10⁶ N. This force results in the attractive force.

Coloumb's law states the relation between the charges and the distance between the charges. Coloumb's law states that the Force is directly proportional to the product of charges and inversely proprotional to the square of distance between them.

The Coloumb's law gives the force of attraction or repulsion between the charged bodies. Two charges with positive or negative charges repels each other. One positive and one negative charge attract each other.

The force increases with the product of charges increases as product of charges and force are directly proprotional. The force decreases with the increase in distance of seperation and vice-versa. The SI unit of force is newton (N).

The Coloumb's law is:

          F = k (q₁×q₂ / r²)

k is the constant of proportionality and is equal to 9×10⁹ N.m²/C².

q₁, q₂ = charges

r² =  distance of seperation of charges.

From the given,

q₁ = -2C ( negative sign represents the negative charge)

q₂ = +3C ( + sign represents the positive charge)

r² = 80 m ( distance between the charges)

F = k (q₁×q₂ / r²)

  = 9×10⁹×2×3 / 80×80

 = 54×10⁹ / 6400

 = 8437500 N

F = 8.4375×10⁶ N

There is the presesnce of both positive and negative charges, hence it results in the attractive force. Hence, the force F between two charges separated by 80m is  8.4375×10⁶ N.

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The final temperature of the water and copper pellets is 43.8°C.

We can use the equation:

\(mc\Delta T = mwCw\Delta T\)

Substituting the values given in the problem:

m c = 28 g

m w = 90 mL = 90 g

c = 0.385 J/g°C

Cw = 4.18 J/g°C

ΔT = T f - 25°C

where T f is the final temperature of the water and copper pellets.

Simplifying the equation:

28 g x 0.385 J/g°C x (T f - 300°C) = 90 g x 4.18 J/g°C x (T f - 25°C)

Solving for T f:

T f = (90 g x 4.18 J/g°C x 25°C + 28 g x 0.385 J/g°C x 300°C) / (90 g x 4.18 J/g°C + 28 g x 0.385 J/g°C)

T f = 43.8°C

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--The complete Question is, What are the final temperature of the water and the copper pellets after thermal equilibrium is reached, assuming no heat is lost to the surroundings?  --

Answer: barometer.

A cyclone is a storm or system of winds that rotates around a center of low atmospheric pressure. An anticyclone is a system of winds that rotates around a center of high atmospheric pressure.

Answer:

D. It does not emit greenhouse gases.

Explanation:

D. It does not emit greenhouse gases.

The speed of the roller coaster at the bottom of the hill if the track was frictionless is 34.04 m/s.

Given that the weight of the roller coaster is 2000 kg and the initial vertical drop of the ride is 59.3 m. We are to find the speed of the roller coaster at the bottom of the hill if the track was frictionless.We know that the roller coaster will lose potential energy due to the vertical drop. Assuming there is no friction, the potential energy will be converted into kinetic energy at the bottom of the hill.Considering the conservation of energy between the potential and kinetic energy, we can set the initial potential energy equal to the final kinetic energy. We can use the formula to calculate potential energy, which is PE = mgh where m = 2000 kg, g = 9.8 m/s², and h = 59.3 m. Therefore,PE = 2000 kg × 9.8 m/s² × 59.3 m = 1,157,924 JWe can use the formula to calculate kinetic energy, which is KE = 1/2mv² where m = 2000 kg and v is the final velocity. Therefore,KE = 1/2 × 2000 kg × v².The total energy remains constant as we know there is no friction. Therefore the final kinetic energy will be equal to the initial potential energy,1,157,924 J = 1/2 × 2000 kg × v²v² = (2 × 1,157,924 J) / 2000 kgv² = 1157.924v = √1157.924v = 34.04 m/s.

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