if such a laser beam is projected onto a circular spot 1.8 mm in diameter, what is its intensity in w/m2?

The correct unit used to measure the electric potential difference is Volts.

Joules is used to measure energy.

Newtons is used to measure forces.

Centimeters is used to measure distance.

Therefore the correct option is the first one.

Answer:

The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.

Answer: 18.56 m/sec

Explanation:

Average velocity =distance/time=5400/(4.85*60)=18.56 m/sec

The change in temperature in kelvin, given that the system was heated from 5 °C to 10 °C is 278 K

We'll begin by obtaining the change in temperature in degree Celsius. This can be obtained as follow:

ΔT = T₂ – T₁

ΔT = 10 – 5

ΔT = 5 °C

Finally, we shall convert 5 °C to unit in kelvin. This can be obtained as follow:

T(K) = T(°C) + 273

T(K) = 5 + 273

T(K) = 278 K

Thus, from the above calculation, we can conclude that the change in temperature is 278 K

Learn more about conversion:

https://brainly.com/question/5684726

#SPJ1

Answer:

Explanation:

Radius of first spherical ball =

2

2

​

cm=1cm

Radius of second spherical ball =

2

2

3

14.5

​

​

cm=

3

14.5

​

cm

Let the radius of the third ball be r cm.

Radius of the main spherical ball =

2

5

​

cm=2.5cm

Volume of main spherical ball = Volume of spherical ball  1+Volume of spherical ball 2+ Volume of spherical ball 3

Volume of a sphere =

3

4

​

πr

3

So,  

3

4

​

π×2.5

3

=

3

4

​

π1

3

+

3

4

​

π(

3

14.5

​

)

3

+

3

4

​

πr

3

⇒2.5

3

=1

3

+(

3

14.5

​

)

3

+r

3

⇒r

3

=15.625−1−14.5

⇒r

3

=0.125=0.5×0.5×0.5

⇒r=0.5

Answer:

It will take 9 hours

Explanation:

If a car travels 100 km per hour and 900 km is divided by 100 it will take 9 hours to travel.

Answer:

A. Energy streaming through space toward Thomas

Explanation:

its correct did it on a test

Answer:

the answer is 1500 because of the internet

The conditions which restrict the motion of the system are called constraints. Constraints are necessary for many practical problems to reduce the number of degrees of freedom in the system and make it easier to analyze.

Without constraints, the motion of a system would be unpredictable and difficult to model. In physics, a degree of freedom refers to the number of independent parameters that are needed to define the state of a physical system.

A system with n degrees of freedom can be described by n independent variables, such as position, velocity, and acceleration. However, not all degrees of freedom may be available for the system to move freely.

This is where constraints come into play. Constraints limit the motion of the system by restricting certain degrees of freedom.

To know more about constraints visit:

https://brainly.com/question/32387329

#SPJ11

A battery rating given in ampere-hours measures the total amount of charge the battery can deliver over time.

A battery rating given in ampere-hours (Ah) quantifies the total amount of charge a battery can deliver over a specific period of time. It represents the product of the battery's current (in amperes) and the duration of discharge (in hours) until the battery is depleted.

For example, a 5 Ah battery can supply a current of 1 ampere for 5 hours or 0.5 amperes for 10 hours before it is fully discharged. Ampere-hours provide a measure of a battery's capacity or energy storage capability.

This rating is commonly used for rechargeable batteries in various applications, such as automotive batteries, portable electronics, and renewable energy systems, allowing users to estimate the battery's performance and plan their usage accordingly.

To learn more about current

Click here brainly.com/question/30776239

#SPJ11

Answer:

30m/s

Explanation:

Use the formula

V= d /t

The mean free time between collisions for aluminum wire is

1.62 * 10^-20 s and the mean free time between collisions for Iron is

1.68 * 10^-20 s.

Electrons are subatomic particles that carry a negative electrical charge. They are found outside the nucleus of an atom and are responsible for chemical reactions, electrical conductivity, and magnetism.

The mean free time between collisions for electrons in a metal wire can be calculated using the mean free path (λ) and the electron density (n) of the metal. The mean free time between collisions is given by the equation:

τ = λ / v

Where τ is the mean free time, λ is the mean free path, and v is the velocity of the electrons.

Using the formula, we can calculate mean free path:

λ = 1 / (n * σ)

Where σ is the collision cross-section, which is a measure of how likely it is for an electron to collide with an atom in the metal.

For aluminum, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.49 * 10^28 * 2.82 * 10^-15) = 3.51 * 10^-14 m

For aluminum, the mean free time between collisions is:

τ = λ / v = 3.51 * 10^-14 m / (2.18 * 10^6 m/s) = 1.62 * 10^-20 s

For Iron, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.05 * 10^28 * 2.82 * 10^-15) = 3.65 * 10^-14 m

For Iron, the mean free time between collisions is:

τ = λ / v = 3.65 * 10^-14 m / (2.18 * 10^6 m/s) = 1.68 * 10^-20 s

To know more about electrons, visit:

brainly.com/question/1255220

#SPJ4

Answer:

objects with greater mass should have greater inertia

NOT an event horizon is its binary counterpart, which transports matter to it.

To refer to the item or person that is the target of an action, we typically use the word "object." Alternatively, the recipient. In a sentence, a verb's action is transferred to a noun or pronoun as a direct object. It typically responds to the what- or whom-questions regarding the verb.

Icons, cursors, buttons, sprites, and other complicated artworks can be made from a collection of simple visual pieces called image objects. Without having to sketch a single pixel, Image Objects let you express creativity.

To know more about Object visit:

https://brainly.com/question/12569661

#SPJ

W= mg × d × cosx

W= 12 × 10 × 2.2 × (-1)= -264 J

I hope it helps you

please mark brainliest ♡

The process that directly involves gametes is pollination and fertilization in a pine tree, option J.

Gametes are reproductive cells that are involved in sexual reproduction. In plants, pollen grains contain the male gametes, while the female gametes are present in the ovules of the female reproductive structures. During pollination, the pollen grains are transferred from the male to the female reproductive structures, leading to the fusion of the male and female gametes, known as fertilization. This process results in the formation of a zygote, which eventually develops into a seed. Therefore, in option J, the pollination and fertilization process directly involves gametes and is essential for the reproduction and survival of the pine tree. It is crucial to understand the significance of gametes in sexual reproduction and their role in the formation of zygotes.

To know more about gametes visit:

https://brainly.com/question/29882202

#SPJ11

Answer:

0.07km/s

Explanation:

The question asks you to find the speed in kilometres per second.

Since your time given is in minutes, convert it to seconds first.

Min to sec = min × 60

use the formula

\(s = \frac{d}{t} \)

speed equals distance over time, using the value for time in seconds.

\(s = \frac{200}{2700} \)

That equates to the answer above.

7 meters per second is the speed of the 4.0kg ball with a kinetic energy of 98J .

Energy possessed by an object due to its motion is referred to as Kinetic energy.

This is expressed as;

K.E = 1/2 × m × v²

Where the velocity is v, mass is m.

Given that;

To determine the speed of the rolling ball, substitute  the given values into the kinetic energy formula and solve for velocity.

Kinetic energy = 1/2 × mass × (speed)²

98J = 1/2 × 4kg × (speed)²

98kgm²/s²  = 0.5 × 4kg × (speed)²

98kgm²/s²  = 2kg × (speed)²

(speed)² = 98kgm²/s² / 2kg

(speed)² = 49kgm²/s²

Speed = √( 49kgm²/s² )

Speed = 7m/s

Therefore, the speed of the rolling ball is 7m/s.

Learn more about kinetic energy here: brainly.com/question/12669551

#SPJ1

c . The book has potential energy and the bike has kinetic energy statement is correct

Let's use an illustration to demonstrate P. E. and K.E. The hammer has potential energy, which it will have as you raise it higher. On the other hand, the hammer will have kinetic energy when you lower it to strike the surface of the table.

Only chemical energy, which is potential energy held inside the item and in the union of its atoms and molecules, is not regarded as kinetic energy. Motion is created by kinetic energy. Any item in motion has kinetic energy. The more kinetic energy an item possesses, the heavier and quicker it moves. The wheels of a bicycle spin when you push off the pedals.

learn more about P.E. and K.E refer

https://brainly.com/question/23853839

#SPJ1

Answer:

B:17

Explanation:

I did the calculations i think the answer is B if i got it right

Answer:

The real answer is C : organize the data in a chart or a table.

The speed of the objects after collision, given that they stocked together is 5.4 m/s

We'll beging by listing out the given parameters from the question. This is given below:

The speed after the collision can be obtained as shown below:

Momentum before = momentum after

m₁u₁ + m₂u₂ = v(m₁ + m₂)

(2 × 4) + (5 × 6) = v(2 + 5)

8 + 30 = v × 7

38 = v × 7

Divide both sides by 7

v = 38 / 7

v = 5.4 m/s

Thus, the speed after collision is 5.4 m/s

Learn more about speed after collision:

https://brainly.com/question/29207170

#SPJ1

Given:

Mass attached to the left-hand side = 3 kg

Mass attached to the right-hand side = 5 kg

Let's find the magnitude of the instantaneous acceleration of the system when it is released from rest.

Apply the formula:

Where:

m1 = 3 kg

m2 = 5 kg

g = 9.8 m/s^2

Thus, we have:

The magnitude of the instantaneous acceleration is 2.45 m/s².

ANSWER:

2.45 m/s²

The correct choice is "when the displacement is a zero". In simple harmonic motion, the speed is greatest when the displacement is zero, i.e., at the equilibrium position.

In simple harmonic motion, the speed of an oscillating object is the greatest when the displacement is zero, and the magnitude of the acceleration is zero. This occurs when the object passes through its equilibrium position.

At this point, the potential energy is at its minimum and the kinetic energy is at its maximum. As the object moves away from the equilibrium position, the potential energy increases while the kinetic energy decreases, resulting in a decrease in speed.

As the object approaches the maximum displacement, the potential energy is at its maximum while the kinetic energy is at its minimum, resulting in a decrease in speed. Therefore, the speed is greatest when the object passes through its equilibrium position.

For more question on displacement click on

https://brainly.com/question/14422259

#SPJ11

The correlation coefficient between the wattage or heating area is approximately 0.2565, indicating a weak positive relationship. As wattage increases, there is a tendency for the heating area to increase, but the relationship is not strong or consistent.

The Pearson correlation coefficient is a statistical metric that may be used to determine the relationship between wattage and heating area. This coefficient has a range of -1 to +1, with +1 denoting a perfect positive correlation, 0 denoting no connection, and -1 denoting a perfect negative correlation.

We determine that the correlation coefficient for the provided data is around 0.2565, after computing it. The wattage and heating area are directly related since the correlation coefficient is positive. However, the correlation is weak, as indicated by the value of 0.2565. In other words, there is a little but positive correlation between the wattage and heating surface area of electric space heaters.

Learn more about coefficient here:

https://brainly.com/question/30021509

#SPJ11

CQ

A consumer buying cooperative test 20 different electric space heaters with various wattages were tested for their ability to effectively heat a space. These are the outcomes.

Area of Heater Wattage

1 750 125, 2 1,000 145, 3 1,750 204, 4 2,000 132, 5 1,500 108, 6 1,000 51, 7 1,250 232, 8 750 128, 9 2,000 297, 10 1,250 271, 11 1,500 41, 12 1,750 275, 13 2,000 285, 14 2,000 259, 15 1,500 156, 16 1,250 252, 17 750 61, 18 750 72, 19 1,500 41, 20 1,250 164

Calculate the relationship between heating area and wattage. Is there an indirect or direct connection?

Answer:

Given

velocity( v) =3m/s

momentum (p) =9kg.m/s

mass (m) =?

Form

p=mv

m=p/v

(9kg.m/s) /3m/s

p=3kg

mass =3kg

To calculate the length of a simple pendulum, we can use the formula for the period of a pendulum: T = 2π√(L/g), Where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity.

In this case, T = 2.23 seconds and g = 9.8 m/s². We can rearrange the formula to solve for L:
L = (T² * g) / (4π²)
Plugging in the given values:
L = (2.23² * 9.8) / (4π²)
L ≈ 0.989 meters
The length of the pendulum is approximately 0.989 meters.

Learn more about acceleration here ;

https://brainly.com/question/2303856

#SPJ11

Distance from the recording station to the epicenter of the earthquake is 1710 km.

Seismograph is used to find the intensity of shock wave produce by the surface of the Earth.

Time interval between the first P waves and the first S waves: t(S) - t(P) = 180 s

As , distance(S) = speed(S) x time(S) = 3.0 km/s x 180 s = 540 km

time(total) = t(P) + time taken for P waves to reach the recording station = 180 s + 270 s = 450 s

distance(P) = speed(P) x time(total) = 5.0 km/s x 450 s = 2250 km

distance(record station to epicenter) = distance(P) - distance(S) = 2250 km - 540 km = 1710 km

Therefore, distance from the recording station to the epicenter of the earthquake is 1710 km.

To know more about seismograph, refer

https://brainly.com/question/14704742

#SPJ1