A package of chips weighs 45 grams. How much is that in kilograms?

Answer:

concentration of H+ ions is more in pH 3.0

Explanation:

As we know that pH of a solution is defined as

[tex]pH = - Log H^+[/tex]

here we know that grape fruit has pH given as 3

[tex]3 = - Log H^+[/tex]

[tex]H^+ = 10^{-3}[/tex]

Now for pH of 8 type solutions we will have

[tex]8 = - Log H^+[/tex]

[tex]H^+ = 10^{-8}[/tex]

So concentration of H+ ions is more in pH 3.0

Yes, violet light cause electrons to be emitted from caesium.

Given that;

A ray of violet light has a wavelength of about 4.2×10⁻⁷ m.

When exposed to violet light, caesium does have the potential to emit electrons through a phenomenon called the photoelectric effect.

The photoelectric effect occurs when light, in this case, violet light, transfers its energy to electrons in a material, causing them to be emitted.

The emission of electrons is influenced by factors like the intensity of the light, the frequency (or wavelength) of the light, and the properties of the specific material.

In the case of caesium, violet light with a wavelength of about 4.2×10⁻⁷ m falls within the visible light spectrum and can provide enough energy to cause electron emission.

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Final answer:

The subject is photoelectric effect in physics, where the energy of violet light (wavelength of about 4.2×10−7 m) is compared to cesium's work function to determine if electrons will be emitted.

Explanation:

The question involves the concept of photoelectric effect in physics, where light can cause electrons to be emitted from a material. This phenomenon is governed by the work function of the material, which is the minimum energy needed to remove an electron. For cesium, we need to compare the energy of the violet light (approximately 4.2×10−7 m) to the work function of cesium to determine if photoemission would occur.

Using the photoelectric equation and Planck's constant, we can calculate the energy of the photon and then compare it to the work function of cesium. As discussed in the references provided, certain wavelengths of light, like 420-nm violet light with an energy of 2.96 eV, are just above the threshold frequency for materials like calcium. Since the threshold wavelength for cesium is not directly provided, we need to look at the stopping potential mentioned (0.33V for 546nm light for cesium), which gives a hint about the work function of cesium. We understand that if the photon's energy is higher than this work function, electrons will be emitted.

Answer:

It is larger than the second star.

It is younger than the second star.

Explanation:

The star's actual brightness depends on two factors: size and surface temperature. If we take two stars of the same size, hotter star would look brighter. If we take two stars with the same surface temperature, bigger star would like brighter.

In the given scenario, two options can be correct. The first star might be larger than the second one or it can be younger as younger stars are hotter.

Answer:

Since there is no torque on the planet with respect to position of Sun

So the angular momentum of the planet is always constant

hence the rate of change in area with respect to sun is always constant

Explanation:

As we know that rate of area swept by the planet is given as

[tex]v_a = \frac{dA}{dt}[/tex]

here we know that small area swept by the planet is given as

[tex]dA = \frac{1}{2}r^2\theta[/tex]

now rate of area swept by the planet is given as

[tex]\frac{dA}{dt} = \frac{1}{2}r^2\frac{d\theta}{dt}[/tex]

[tex]\frac{dA}{dt} = \frac{1}{2}r^2\omega[/tex]

so we have

[tex]\frac{dA}{dt} = \frac{1}{2m}(mr^2\omega)[/tex]

here we know that angular momentum of the planet with respect to sun is given as

[tex]L = mr^2\omega[/tex]

so we have

[tex]\frac{dA}{dt} = \frac{L}{2m}[/tex]

since we know that there is no torque on the system of planet with respect to sun

So angular momentum of the planet will remain constant

hence we can say

[tex]\frac{dA}{dt} = \frac{L}{2m}[/tex] = constant always

Answer:

Cylinder is the most important working part of the engine it is arranged adjacently in the engine.

So, we need to tell how many cylinders are there in order to maintain a proper balance.

So, Some engines have 6 some have 4 cylinders.

So., always 6 and always 4 that is option B and D are discarded.

Therefore, The option A is correct that is an even number.

Answer:C) Sticking the balloon in a freezer.

Explanation:

Sticking the balloon in a freezer will cause the pressure to drop because the air inside will become colder and lead to the particles having lower kinetic energies. In, turn their rate of collisions will decrease and cause the pressure to drop. Leaving the balloon in a hot car and squeezing the balloon will cause a pressure increase and taking the balloon to the top of a hill may or may not cause a pressure increase.

Answer:

C) Sticking the balloon in a freezer.

Explanation:

When we put the balloon into the freezer then due to decrease in the temperature we can find the effect on its pressure using ideal gas Law

It is given as

[tex]PV = nRT[/tex]

so here on decreasing the temperature if volume is assumed to be constant the pressure is given as

[tex]P = \frac{nR}{V} T[/tex]

so pressure will also decrease on decreasing the temperature

so correct answer will be

C) Sticking the balloon in a freezer.

The lowest possible frequency that can form in a musical instrument is called the fundamental frequency. Hence option A is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase.

Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down.

Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase.

Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave.

Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.

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One of the advantages of solar energy is that it is nonpolluting. :)

Answer:

ΔV=V1-V2 = 27692307.69volts

Explanation:

Hello! Let's solve this!

The formula to calculate the power difference is

ΔV=V1-V2

V = k * (q / r)

k is a constant that equals [tex]k=9*10^{9}N*m^{2}/C^{2}[/tex]

The data we have are:

[tex]k=9*10^{9}N*m^{2}/C^{2}[/tex]

r = 0.0013m

[tex]q1=40*10^{-6}C\

F=15*10^{-6}  N[/tex]

From the following formula we can calculate how much q2 is

F = k * (q1 * q2 / r2)

q2 = (F * r2) / (k * q1)

q2 = (15*10^{-6}  N[/tex] * 0.00132) / (9*10^{9}N*m^{2}/C^{2}[/tex]  *40*10^{-6}C\)

[tex]q2=7.0417x^{-17}C[/tex]

Now we calculate with q1 and q2, V1 and V2 respectively.

V1 = (9*10^{9}N*m^{2}/C^{2}[/tex]  * 40*10^{-6}C\) /0.0013m

V1 = 27692307.69 volts

V2 = (9*10^{9}N*m^{2}/C^{2}[/tex]  * 7.0417x^{-17}C[/tex]) /0.0013m

[tex]V2=4.875*10^{-4}volts[/tex]

Then we solve the potential difference:

V1-V2 = 27692307.69 volts-4.875*10^{-4}volts[/tex]

ΔV=V1-V2 = 27692307.69volts

Answer:

C. 4.9 × 10-4 V

Explanation:

ΔV = E d  

E = force/charge = 15 µN / 40 µC = 0.375 N/C

ΔV = 0.375 N/C * 0.0013 m = C. 4.9 × 10-4 V

Answer: 200 w in apex

Final answer:

The swimmer's speed in still water is determined by dividing the river width (200 m) by the total swimming time (400 s), which gives a speed of 0.5 m/s.

Explanation:

The question involves calculating the speed at which a swimmer can swim in still water. The swimmer crosses a 200 m wide river and is swept downstream 480 m, reaching the opposite bank in 6 minutes and 40 seconds. To determine the speed in still water, we'll need to consider two components of the swimmer's velocity: one perpendicular to the river's flow (the swimmer's own speed in still water) and one parallel to the flow (the river's current).

Let v be the speed of the swimmer in still water (m/s) and u be the speed of the river current (m/s). The swimmer's downstream displacement due to the current is 480 m, which is equivalent to u × t, where t is the total swimming time. The total time taken is 400 seconds (6 min 40 s).

The perpendicular component of the swimmer's motion relative to the river banks is 200 m, which should be equal to v × t. From this, we can solve for v by dividing the river width by the total swimming time:

v = 200 m / 400 s = 0.5 m/s

Thus, the swimmer's speed in still water is 0.5 m/s.

The woman is 282.84 kilometers far from her starting point. The distance is calculated from the given values that women travel.

Given:

The distance covered in the north direction = 300 km

The distance covered in the west direction = 200 km

The distance covered in the south direction = 500 km

The net displacement between the south and north points are:

Distance from the South direction - Distance from the North direction

D = 500 - 300

D = 200 km

From Pythagoras's theorem, the distance from the starting point is:

Distance = √[(200 km)² + (200 km)²]

Distance = √(40000 km² + 40000 km²)

Distance =  282.84 kilometers

Hence, the woman is 282.84 kilometers far from her starting point.

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The East European Plain is the largest mountain-free land area in Europe. It expands roughly 2000 miles and has a variety of geographic features including ice blocks reaching 2 to 3 kilometers in height.

The largest mountain-free land area in Europe is the East European Plain, also known as the Russian Plain. This geographical feature stretches for about 2000 miles and is roughly a thousand kilometers wide. The structure of the East European Plain exhibits intriguing cells or polygons that have an average width of more than 30 kilometers.

Despite no large mountains, the Plain shows diversity with some areas like the ice blocks in the middle, which are of frozen water and reach heights of nearly 2 to 3 kilometers. This example lends an interesting insight into the geomorphological features of the area despite not being classified as a mountain.

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Answer:

The acceleration of the car was -4.4545 m/sec² where the negative sign indicates deceleration (decrease in acceleration)

Explanation:

To answer this question, we will use the following equation of motion:

v² = u² + 2as

where:

v is the final velocity = 0 m/sec (car became at rest)

u is the initial velocity = 28 m/sec

a is the acceleration we want to find

s is the distance covered = 88 m

Substitute with the givens in the equation to get "a" as follows:

v² = u² + 2as

0 = (28)² + 2(a)(88)

0 = 784 + 176a

176a = -784

[tex] a = \frac{-784}{176} [/tex] = -4.4545 m/sec²

Hope this helps :)

Answer:

A. Each is independent of the other.

Hope this helps!

Explanation:

The vertical velocity of a projectile is unaffected by the horizontal velocity; these two components of motion are independent of each other.

The amount of open ground space needed for each set of bleachers is 12.825 square meters.

To calculate the area required for the portable bleachers, which are 4.50 meters in length and 2.85 meters in width, we multiply the length by the width. Thus, the area (A) is given by the formula A = length  imes width. By substituting the given dimensions, A = 4.50 m  imes 2.85 m = 12.825 m2. This calculation provides the total ground space necessary for setting up a single set of bleachers, assuming that no additional space is required for clearances or walkways between the bleachers.

Final answer:

The amount by which the temperature can be raised is calculated by using the specific heat capacity of water and converting BTUs to joules to find the temperature change in Celsius, which is then converted to Fahrenheit.

Explanation:

To determine by how many degrees Fahrenheit one metric ton of water can be raised with the addition of 110 thousand BTUs of heat, we need to use the specific heat capacity of water and convert the energy from BTUs to a compatible unit.

The specific heat capacity of water is 4.184 joules per gram per degree Celsius (J/g°C). Moreover, the conversion from BTUs to joules is necessary for the calculations. Since 1 BTU corresponds to approximately 1055.06 joules, 110,000 BTUs is equivalent to 110,000 × 1055.06 joules.

A metric ton of water is equal to 1,000,000 grams. Assuming the specific heat capacity of water is 4.184 J/g°C, we can set up an equation to find the temperature change in Celsius, which can then be converted to Fahrenheit.

The heat energy equation is heat energy (Q) = mass (m) × specific heat capacity (c) × temperature change (ΔT).

Q = m × c × ΔT

Substituting our values, we have:

110,000 BTUs × 1055.06 J/BTU = 1,000,000 g × 4.184 J/g°C × ΔT

This gives us the temperature change in Celsius, which can then be multiplied by 1.8 to convert to Fahrenheit.

Answer:

Mutt have to apply twice the larger force than applied by Jeff

Explanation:

Since Mutt and Jeff want to reach the destination at same time

As given that wagon carried by Mutt is twice heavy than wagon of Jeff

Now to reach the destination both of the wagon must be pulled with same acceleration so that both wagon can cover equal distance in equal interval of time

Now we know that

[tex]F = ma[/tex]

since mass of wagon carried by Mutt is twice heavy than wagon of Jeff so here the force applied by Mutt must be twice larger than the force applied by Jeff.

Answer:

Mutt must use twice as much force to push his cart.

Explanation:

yw.

Answer:

Gases do not have definite volume.

Explanation:

Solids, liquids and gas are three forms of matter. Solids have fixed shape and volume. Liquids do not have fixed shape but have fixed volume. Gases neither have fixed shape nor volume. The particles of solid are tightly packed whereas the particles of gas are very loosely packed and the force of attraction between the particles of gas is very weak.

When the perfume bottle is opened, some liquid changes to gas and fragrance spreads around the room because the particles of gas are very loosely packed and the force of attraction between the particles of gas is very weak. The gas particles do not have fixed volume and easily spread.