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2 years ago

Select all the correct answers.

Physics

2 answers:

crimeas [40]2 years ago

6 0

It keeps the solar wind from reaching earth

Maslowich2 years ago

3 0

Answer:

It keeps the solar wind from reaching Earth.

Explanation:

Solar Wind corresponds to the emission of particles from the solar corona. The mechanism by which the Solar Wind is formed is still not exactly known. So far, it is known that it consists of a plasma composed of electrons, protons and sub-particles like neutrinos. This plasma is composed of particles loaded with ionized atoms with greater weight and which undergo an acceleration caused by the thermonuclear reactions of the Sun, being then fired in all directions with high speeds, reaching approximately 400 km / s. When close to Earth, the particles can reach up to 800 km / s and have densities around 10 particles per cubic centimeter.

The evolution of the studies has already allowed the identification of some effects caused by the Solar Wind. The tails of comets have their orientation defined exactly due to the Solar Wind. Another registered effect is the change in planetary magnetic fields, because the magnetic field protects the planet against the effects of the solar wind, but ends up being damaged.

In addition, the Solar Wind also interferes with the propagation of radio waves, has an effect on the flight track of space vehicles and can directly influence the Earth's climate when solar flares are very violent.

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An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. T

Maksim231197 [3]

Answer:

Explanation:

We are given that

Initial voltage, $V_1=120 V$

Final voltage, $V_2=5 V$

Number of tuns in primary coil of the transformer, $N_p=840$

Rms current, $I_{rms}=580mA=580\times 10^{-3} A$

$1 mA=10^{-3} A$

We have to find the number of turns are there on the secondary coil.

We know that

$\frac{N_s}{N_p}=\frac{V_2}{V_1}$

Using the formula

$\frac{N_s}{840}=\frac{5}{120}$

$N_s=\frac{5}{120}\times 840=35$

Hence, there are number of turns on the secondary coil=35

8 0

2 years ago

A 30-kg child rides a 20-kg bicycle together,the child and the bicycle have a momentum of 110 kg•m/s. What is the velocity of th

Korolek [52]

What are the options for this?

3 0

3 years ago

Which descriptions best fit the labels? X: kinetic energy Y: potential energy X: potential energy Y: kinetic energy X: mechanica

GalinKa [24]

its the 3rd option!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

4 0

3 years ago

Read 2 more answers

A heat engine: A) converts heat input to an equivalent amount of workB) converts work to an equivalent amount of heat C) takes h

Masja [62]

Answer:

C. Takes heat in, does work, and loses energy heat.

Explanation:

Heat engine is a system makes use of thermal energy (heat) to in order to do mechanical work.

This occurs by converting the heat into mechanical energy. This energy is then used to do work.

The key characteristic of a heat engine is that the substance with which work is done by, goes from a higher temperature to a lower temperature.

Hence, it loses heat as it does work.

3 0

2 years ago

A 3500 kg truck is parked on a 7.0∘ slope. How big is the friction force on the truck?

Arada [10]

Answer:

4180 N

Explanation:

In order to keep the truck balanced and stationary, the force of friction on the truck must be equal to the component of the weight of the truck acting parallel to the slope.

The component of the weight of the truck acting parallel to the slope is:

$mg sin \theta$

where

m = 3500 kg is the mass of the truck

g = 9.8 m/s^2 is the acceleration of gravity

$\theta=7.0^{\circ}$ is the angle of the slope

Therefore, the force of friction must be equal to

$F=(3500)(9.8)(sin 7.0^{\circ})=4180 N$

6 0

3 years ago

Read 2 more answers