Physics
: asked on sascsl7973

11.06.2022 the following question

is applied to a mass of water that initially filled a

2000cm3

volume. Estimate its volume after the pressure is applied.

8

Physics

Step-by-step answer

Options:

a. a lower frequency and a shorter wavelength.

b. a higher frequency and a longer wavelength.

c. a lower frequency and a longer wavelength.

d. a higher frequency and a shorter wavelength

Answer:

d. a higher frequency and a shorter wavelength

Explanation:

The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength. Light waves have very, very short wavelengths.

For example, Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.

a. a lower frequency and a shorter wavelength.

b. a higher frequency and a longer wavelength.

c. a lower frequency and a longer wavelength.

d. a higher frequency and a shorter wavelength

Answer:

d. a higher frequency and a shorter wavelength

Explanation:

The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength. Light waves have very, very short wavelengths.

For example, Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.

Physics

Step-by-step answer

Options:

a. 0.08 meters

b. 0.16 meters

c. 0.32 meters

d. 1.8 meters

Answer:

b. 0.16 meters

Explanation:

In the picture

a. 0.08 meters

b. 0.16 meters

c. 0.32 meters

d. 1.8 meters

Answer:

b. 0.16 meters

Explanation:

In the picture

Physics

Step-by-step answer

Answer: Option B and C are True.

Explanation:

The weight of the two blocks acts downwards.

Let the weight of the two blocks be W. Solving for T₁ and T₂:

w = T₁/cos 60° -----(1);

w = T₂/cos 30° ----(2);

equating (1) and (2)

T₁/cos 60° = T₂/cos 30°;

T₁ cos 30° = T₂ cos 60°;

T₂/T₁ = cos 30°/cos 60°;

T₂/T₁ =1.73.

Therefore, option a is false since T₂ > T₁.

Option B is true since T₁ cos 30° = T₂ cos 60°.

Option C is true because the T₃ is due to the weight of the two blocks while T₄ is only due to one block.

Option D is wrong because T₁ + T₂ > T₃ by simple summation of the two forces, except by vector addition.

Explanation:

The weight of the two blocks acts downwards.

Let the weight of the two blocks be W. Solving for T₁ and T₂:

w = T₁/cos 60° -----(1);

w = T₂/cos 30° ----(2);

equating (1) and (2)

T₁/cos 60° = T₂/cos 30°;

T₁ cos 30° = T₂ cos 60°;

T₂/T₁ = cos 30°/cos 60°;

T₂/T₁ =1.73.

Therefore, option a is false since T₂ > T₁.

Option B is true since T₁ cos 30° = T₂ cos 60°.

Option C is true because the T₃ is due to the weight of the two blocks while T₄ is only due to one block.

Option D is wrong because T₁ + T₂ > T₃ by simple summation of the two forces, except by vector addition.

Physics

Step-by-step answer

**Answer:**

**Step-by-step explanation:**

To solve this problem, we can use the conservation of energy and conservation of momentum principles.

**Conservation of energy:**

The total initial energy is the rest energy of the proton and neutron, which is given by:

Ei = (mp + mn)c^2

where mp and mn are the masses of the proton and neutron, respectively, and c is the speed of light.

The total final energy is the rest energy of the deuteron plus the energy of the gamma ray, which is given by:

Ef = (md)c^2 + Eg

where md is the mass of the deuteron and Eg is the energy of the gamma ray.

According to the conservation of energy principle, the initial energy and final energy must be equal, so we have:

Ei = Ef

(mp + mn)c^2 = (md)c^2 + Eg

**Conservation of momentum:**

The total initial momentum is zero because the proton and neutron are at rest. The total final momentum is the momentum of the deuteron and the momentum of the gamma ray. Since the gamma ray is massless, its momentum is given by:

pg = Eg/c

where pg is the momentum of the gamma ray.

According to the conservation of momentum principle, the total final momentum must be equal to zero, so we have:

0 = pd + pg

where pd is the momentum of the deuteron.

**Solving for md and pd:**

From the conservation of energy equation, we can solve for md:

md = (mp + mn - Eg/c^2)/c^2

Substituting this expression into the conservation of momentum equation, we get:

pd = -pg = -Eg/c

Substituting the given values, we have:

mp = 1.6726 × 10^-27 kg mn = 1.6749 × 10^-27 kg Eg = 2.2 × 10^6 eV = 3.52 × 10^-13 J

Using c = 2.998 × 10^8 m/s, we get:

md = (1.6726 × 10^-27 kg + 1.6749 × 10^-27 kg - 3.52 × 10^-13 J/(2.998 × 10^8 m/s)^2)/(2.998 × 10^8 m/s)^2 = 3.3435 × 10^-27 kg

pd = -Eg/c = -(3.52 × 10^-13 J)/(2.998 × 10^8 m/s) = -1.1723 × 10^-21 kg·m/s

**Therefore, the mass of the deuteron is 3.3435 × 10^-27 kg, and its momentum is -1.1723 × 10^-21 kg·m/s.**

Physics

Step-by-step answer

**Answer:**

**Step-by-step explanation:**

Time taken by the tomatoes to each the ground

using h = 1/2 g t^2

t^2 = 2h/g = 2 x 50/ 9.8 = 10.2

t = 3.2 sec

horizontal ditance = speed x time = 3 x 3.2 = 9.6 meters

Physics

Step-by-step answer

The question specifies the diameter of the screw, therefore the IMA of this screw is 0.812? / 0.318 = 8.02

Physics

Step-by-step answer

Answer:

7.25 secs.

Explanation:

First find the distance it takes to stop

s = [v^2-u^2]/2a = 0^2 - 8.7^2/2[-2.4] = 8.7^2/4.8

Next find the time it takes to go that distance , s = ut +[1/2] at^2

8.7^2/4.8 = 8.7t +[1/2] [ -2.4]t^2 , rearrange and

t^2 -[8.7/1.2]+ 8.7^2/[(1.2)(4.8)]=0 complete the square

[t - (8.7/2.4)]^2=0

t = 8.7/2.4 = 3.625 secs

At this stage the deceleration will push the object back in the direction it came from for another 3.625 secs when it will be 8.7 m/s again

Total time , T =2t = 7.25 secs.

Note:

The term differential is used in calculus to refer to an infinitesimal (infinitely small) change in some varying quantity. For example, if x is a variable, then a change in the value of x is often denoted Δx (pronounced delta x). The differential dx represents an infinitely small change in the variable x.

7.25 secs.

Explanation:

First find the distance it takes to stop

s = [v^2-u^2]/2a = 0^2 - 8.7^2/2[-2.4] = 8.7^2/4.8

Next find the time it takes to go that distance , s = ut +[1/2] at^2

8.7^2/4.8 = 8.7t +[1/2] [ -2.4]t^2 , rearrange and

t^2 -[8.7/1.2]+ 8.7^2/[(1.2)(4.8)]=0 complete the square

[t - (8.7/2.4)]^2=0

t = 8.7/2.4 = 3.625 secs

At this stage the deceleration will push the object back in the direction it came from for another 3.625 secs when it will be 8.7 m/s again

Total time , T =2t = 7.25 secs.

Note:

The term differential is used in calculus to refer to an infinitesimal (infinitely small) change in some varying quantity. For example, if x is a variable, then a change in the value of x is often denoted Δx (pronounced delta x). The differential dx represents an infinitely small change in the variable x.

Physics

Step-by-step answer

First sum applied the Newton's second law motion: F = ma

Force = mass* acceleration

This motion define force as the product of mass times Acceleration (vs.Velocity). Since acceleration is the change in velocity divided by time,

force=(mass*velocity)/time

such that, (mass*velocity)/time=momentum/time

Therefore we get mass*velocity=momentum

Momentum=mass*velocity

Elephant mass=6300 kg; velocity=0.11 m/s

Momentum=6300*0.11

P=693 kg (m/s)

Dolphin mass=50 kg; velocity=10.4 m/s

Momentum=50*10.4

P=520 kg (m/s)

The elephant has more momentum(P) because it is large.

Force = mass* acceleration

This motion define force as the product of mass times Acceleration (vs.Velocity). Since acceleration is the change in velocity divided by time,

force=(mass*velocity)/time

such that, (mass*velocity)/time=momentum/time

Therefore we get mass*velocity=momentum

Momentum=mass*velocity

Elephant mass=6300 kg; velocity=0.11 m/s

Momentum=6300*0.11

P=693 kg (m/s)

Dolphin mass=50 kg; velocity=10.4 m/s

Momentum=50*10.4

P=520 kg (m/s)

The elephant has more momentum(P) because it is large.

Physics

Step-by-step answer

The change in temperature is 9.52°CExplanation:Since, the heat supplied by the electric kettle is totally used to increase the temperature of the water.Thus, from the law of conservation of energy can be stated as:Heat Supplied by Electric Kettle = Heat Absorbed by WaterHeat Supplied by Electric Kettle = m C ΔTwhere,Heat Supplied by Electric Kettle = 20,000 JMass of water = m = 0.5 kgSpecific Heat Capacity of Water = C = 4200 J/kg.°CChange in Temperature of Water = ΔTTherefore,20,000 J = (0.5 kg)(4200 J/kg.°C) ΔTΔT = 20,000 J/(2100 J/°C)ΔT = 9.52°C

Physics

Step-by-step answer

Weight of jasmine (m) = 400 N

Height climbed on wall (h) = 5m

Total time taken in climbing = 5 sec

Work done in climbing the wall = rise in potential energy = mgh

= 400×9.8×51

= 19600J

Power generated by Jasmine = potential energy / time

= 19600/5

= 3920Watts

Height climbed on wall (h) = 5m

Total time taken in climbing = 5 sec

Work done in climbing the wall = rise in potential energy = mgh

= 400×9.8×51

= 19600J

Power generated by Jasmine = potential energy / time

= 19600/5

= 3920Watts

2 804 students

just now

Mathematics

1 minute ago

Chemistry

1 minute ago

Biology

Studen helps you with homework in two ways: