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3 years ago

The universal force that is effective over the longest distance is?

Physics

2 answers:

Nonamiya [84]3 years ago

8 0

Answer:

Gravity

Explanation:

monitta3 years ago

4 0

Gravity - is the universal force that is effective over the longest distance.

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What should #1 be labeled?

aliya0001 [1]

B. North Pole because it’s pointing at the north pole, and not the others

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3 years ago

A laser pulse with wavelength 532 nm contains 3.85 mj of energy. how many photons are in the laser pulse?

erastovalidia [21]

Answer:<em> </em><em>1.04 × 10¹⁶ photons</em>

Explanation:

1) Data:

E = 3.85mJj (mili joules) = 3.85×10⁻³ J

λ = 532 nm = 532 × 10⁻⁹ m

number of photons ?

2) Physical principles

a) The energy of a photon is given by the equation E = hν.

Where:

h is Planck's constant 6.62607004 × 10⁻³⁴ J×s
ν is the freguency of the light

b) The wavelength, λ, and the frequency, are related by the equation:

ν = c / λ, where c is the speed of light at vacuum, approximately 3.0 × 10⁸ m/s

3) Solution:

ν = c / λ = 3.0 × 10⁸ m/s / (538 nm) × 10⁹ nm/m = 5.576×10¹⁴ Hz

E = hν = 6.62607004 × 10⁻³⁴ J×s s × 5.576×10¹⁴ Hz = 3.69 × 10 ⁻¹⁹ J

Divide the total energy by the energy of one photon to find the number of photons:

3.85×10⁻³ J / 3.69 × 10 ⁻¹⁹ J-photon = 1.04 × 10¹⁶ photons ← answer

4 0

3 years ago

Read 2 more answers

A student sets up an experiment to determine the inertial mass of a cart. The student has access to the following measurement eq

wlad13 [49]

Answer:

The correct answers are a and d

Explanation:

In this experiment it can be analyzed using Newton's second law

F = m a

m = F / m

The outside is supplied by the spring balance and is constant, therefore the acceleration of the system is also constant.

The acceleration can be found with the kinematic equations

x = v t + ½ a t²

As we start from rest the initial speed is zero

a = 2 x / t²

Therefore we need the reading of position and time.

Finally, the relationship between the balance reading and this acceleration of the mass of the system

Let's analyze the answers

a) True. It is one of the necessary quantities

b) False. With the equipment we cannot measure the speed directly

c) false. Acceleration is calculated

d) true. It is the other magnitude necessary for the calculation.

The correct answers are a and d

7 0

3 years ago

Read 2 more answers

Think about the electricity sent to your home from a power plant. How does the voltage of the electricity that leaves the plant

creativ13 [48]

Answer:

C) High voltage to low voltage

Explanation:

At a power plant, there is a production of electricity at a high voltage compared to the voltage provided to our home.

Voltage of about 12 KV is produced by power plant which is then converted into about 400 KV or greater (depending upon the countries) to transfer electricity from power plant to city Grid station using Step-up transformer. At City Grid station, Step-down transformer is used to convert high voltage (about 400 KV) to low voltage (about 13 KV) to transfer electricity from grid station to the city. Then this low voltage (about 13 KV) again converted to 220 V using Step-down transformer for household usage. So, overall about 12 KV voltage at power plant is converted into 220 V for household usage using step-up and step-down transformer at different stages.