Answer:

**Answer:**

where m = mass, g = acceleration due to gravity (9.8 m/s^2), h = height

Given m = 500g = 0.5 kg, h = 9 meters

0.5*9*9.8 = 44.1 joules

**Explanation:**

Answer:

**Answer:44.1**

**Explanation:**

Question Part Points Submissions Used A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.30 m/s in 0.812 s. (a) What is the magnitude of the linear impulse experienced by a 62.0-kg passenger in the car during the time the car accelerates? kg · m/s (b) What is the magnitude of the average total force experienced by a 62.0-kg passenger in the car during the time the car accelerates? N

Where is the density of the material greater, at point B or point C?Explain why.

Neptunium. In the fall of 2002, scientists at Los Alamos National Laboratory determined that the critical mass of neptunium-237 is about 60 kg. The critical mass of a fissionable material is the minimum amount that must be brought together to start a nuclear chain reaction. Neptunium-237 has a density of 19.5 g/cm3. What would be the radius of a sphere of this material that has a critical mass?

If the absolute pressure of gas is 550.280 kPa, its gauge pressure is

n Section 12.3 it was mentioned that temperatures are often measured with electrical resistance thermometers made of platinum wire. Suppose that the resistance of a platinum resistance thermometer is 125 Ω when its temperature is 20.0°C. The wire is then immersed in boiling chlorine, and the resistance drops to 99.6 Ω. The temperature coefficient of resistivity of platinum is α = 3.72 × 10−3(C°)−1. What is the temperature of the boiling chlorine?

Where is the density of the material greater, at point B or point C?Explain why.

Neptunium. In the fall of 2002, scientists at Los Alamos National Laboratory determined that the critical mass of neptunium-237 is about 60 kg. The critical mass of a fissionable material is the minimum amount that must be brought together to start a nuclear chain reaction. Neptunium-237 has a density of 19.5 g/cm3. What would be the radius of a sphere of this material that has a critical mass?

If the absolute pressure of gas is 550.280 kPa, its gauge pressure is

n Section 12.3 it was mentioned that temperatures are often measured with electrical resistance thermometers made of platinum wire. Suppose that the resistance of a platinum resistance thermometer is 125 Ω when its temperature is 20.0°C. The wire is then immersed in boiling chlorine, and the resistance drops to 99.6 Ω. The temperature coefficient of resistivity of platinum is α = 3.72 × 10−3(C°)−1. What is the temperature of the boiling chlorine?

b) 1/r^2

c) 1/r

d) None of above

When an underwater **sound **source emits waves of frequency 30 kHz in all directions, the **intensity **of the waves (in Watts/m2) vary with distance r from the source by the relation** 1/r²**

As the intensity mechanical **sound **wave is **inversely **proportional to the square of the **distance **from the source, therefore the correct option is **B**.

Wavelength can be understood in terms of the **distance **between any two similar **successive **points across any wave for example wavelength can be calculated by measuring the **distance **between any two successive crests.

It is the total length of the **wave **for which it completes one cycle.

The intensity of a mechanical wave is **inversely **proportional to the **square **of the distance from the source.

An underwater sound source emits waves of **frequency **of 30 kHz in all directions, the **intensity **of the waves (in Watts/m2) varies with distance r from the source by the **relation **1/r², therefore the **correct **option is B.

Learn more about **wavelength **from here

#SPJ2

b or c not sure but try

Plants (biosphere) draw water (hydrosphere) and nutrients from the soil (geosphere) and release water vapor into the atmosphere.

partial pressure in a mixture of two or more gases will be given by formula

= mole fraction of gas * total pressure

now here mole fraction is same as percentage of gas in the mixture

Now mole fraction of oxygen is 0.20095 (20.095%)

now here pressure of oxygen in the mixture is given as

so pressure due to oxygen in the mixture will be 0.342 atm

Answer:

20.095

Explanation:

convergent, because it is where the tectonic plates shove themselves together usually resulting in a mountain or volcano

In **plate tectonics** theory, transform boundaries occur when two plates slide past each other, divergent boundaries occur when two plates move away from each other, and convergent boundaries occur when two plates collide. A volcano is most likely to occur at a divergent boundary because the plates move away from each other, allowing magma from the mantle to reach the surface and create new crust.

In plate tectonics theory, Transform boundaries occur when two plates slide past each other horizontally, creating **earthquakes**. Divergent boundaries occur when two plates move away from each other, creating volcanic activity.

Convergent boundaries occur when two plates collide, and depending on the type of plates involved, can result in volcanic activity as one plate is forced beneath the other.

A volcano is most likely to occur at a divergent boundary because the plates move away from each other, allowing magma from the mantle to reach the surface and create new crust.

The Richter scale indicates the magnitude of an earthquake. The figure drawn by the needle during shaking is an outcome of earthquake's energy. This energy is what results in seismic waves travelling through various layers of earth causing shaking on the surface.

#SPJ12

The maximum height, the location on the ground and the initial vertical height of the javelin is required.

The **initial height** of the javelin is **6 feet.**

The** maximum height **of the javelin is **326 feet.**

The **javelin **strikes the **ground **at **160.75 feet.**

The given **equation **is

where is the **horizontal **distance

At we will get the **initial **vertical **height**.

**Vertex **of a parabola is given by

At the **javelin **will hit the **ground**

Learn more about **parabolas **from:

This question is incomplete, the complete question is;

A javelin is thrown in the air. Its height is given by **h(x) = -1/20x² + 8x + 6**

where x is the horizontal distance in feet from the point at which the javelin is thrown.

a. How high is the javelin when it was thrown?

b. What is the maximum height of the javelin?

c. How far from the thrower does the javelin strike the ground?'

**Answer:**

**a. **height of the javelin when it was thrown is **6 ft**

**b. **the maximum height of the javelin is **326 ft**

**c. **distance from the thrower is **160.75 ft **

**Explanation:**

**a)**

Given h(x) = -1/20x² + 8x + 6

we determine the height when x = 0

h(0) = -1/20(0)² + 8(0) + 6 = **6 ft**

therefore height of the javelin when it was thrown is **6 ft**

**b)**

to determine the maximum height of the javelin;

we find the vertex of the quadratic

so

h = - [ 8 / ( 2(-1/20) ) ] = 80

therefore

h(80) = -1/20(80)² + 8(80) + 6

= -320 + 640 + 6 =** 326 ft**

therefore the maximum height of the javelin is **326 ft**

**c)**

Now the thrower is at the point ( 0,0 ) and the javelin comes down at another point ( x,0 )

this is possible by calculating h(x) = 0

⇒ -1/20x² + 8x + 6 = 0

⇒ x² - 160x - 120 = 0

⇒ x = [ -(-160) ± √( (-160)² - 4(1)(-120) ) ] / [ 2(1) ]

x = [ 160 ± √(25600 + 480) ] / 2

so

**[x = 160.75 ; x = -0.75 ]**

distance cannot be Negative

therefore distance from the thrower is **160.75 ft **

**Answer:**

a)

b)

**Explanation:**

Given:

The distance between two speakers (d) = 0.932 m

The distance of the microphone from the midpoint = 2.83 m

Thus, distance of microphone from the nearest speaker (L) = 2.83 - (0.932/2) = 2.364 m

also, the distance of the microphone from the farther speaker (L') = 2.83 + (0.932/2) = 3.296 m

Now,

The path difference is calculated as

L' - L = d = 0.932 m

Now,for a maxima to be produced at the microphone, the waves must constructively interfere.

for this to happen the path difference should be integral multiple of the wavelength.

thus,

hence, the largest wavelength will be for n = 1,

therefore,

0.932 = 1 × λ

or

λ = 0.932 m

now, the velocity of sound is given as c = 343 m/s

thus, the frequency will be

on substituting the values, we get

now, the 2nd largest wavelength will be for n = 2

0.932 = 2 × λ

or

λ = 0.466

thus, the frequency will be

hence, these are the lowest first two frequencies.