What is the constant acceleration of gravity on earth

A man pulls his dog (m=20kg) on a sled with a force of 100N at a 60° angle from the horizontal. What is the horizontal component

sertanlavr [38]

Answer:

the horizontal component of the force is 50 N

Explanation:

Given;

force applied by the man, F = 100 N

angle of inclination of the force, θ = 60⁰

mass of the dog, m = 20 kg

The horizontal component of the force is calculated as;

$F_x = F\times cos(\theta)\\\\F_x = 100 \ N \times cos(60^0)\\\\F_x = 100\ N \times 0.5\\\\F_x = 50 \ N$

Therefore, the horizontal component of the force is 50 N

4 0

3 years ago

Which step of the scientific method is the scientist using? "This paper details my results on how dolphins use sonar to navigate

Kazeer [188]

The step of the scientific method with the information "This paper details my results on how dolphins use sonar to navigate." is: D. Report Results.

Science can be defined as a branch of intellectual and practical study that systematically observes a body of fact with respect to the structure and behavior of both living and non-living organisms in the natural world through experiments.

Some of the steps (activities or actions) that a scientist performs (carries out) while using a scientific method include the following:

Analyze data and draw conclusions.

Observation.

Experimentation.

Report results.

The results of an experiment provide the necessary data and information about the specimen which was used in the course of conducting an experiment.

Hence, a report result would convey these information to the user (reader) of scientific method proposed by a scientist.

In conclusion, a paper which details the results on how dolphins use sonar to navigate is considered a report of the results.

6 0

3 years ago

The red giant Betelgeuse has a surface temperature of 3000 K and is 600 times the diameter of our sun. (If our sun were that lar

Nat2105 [25]

Answer:

Explanation:

a )

Radius of the sun = .69645 x 10⁹ m .

600 times = 600 x .69645 x 10⁹ m

= 4.1787 x 10¹¹ m .

surface area A = 4π (4.1787 x 10¹¹)²

= 219.317 x 10²²

energy radiated E = σ A Τ⁴

= 5.67 x 10⁻⁸ x 219.317 x 10²² x (3000)⁴

= 100695 x 10²⁶ J

To know the wavelength of photon emitted

$\lambda_mT= b$

$\lambda_m= \frac{b}{T}$

= 2.89777 x 10⁻³ / 3000

= 966 nm

= 1275 /966 eV

1.32 x 1.6 x 10⁻¹⁹ J

= 2.112 x 10⁻¹⁹ J

No of photons radiated = 100695 x 10²⁶ / 2.112 x 10⁻¹⁹

= 47677.5 x 10⁴⁵

= .476 x 10⁵⁰ .

b )

energy radiated by our sun per second

E₂ = σ A 5800⁴

energy radiated by Betelgeuse per second

E₁ = σ x 600²A x 3000⁴

E₁ / E₂ = σ x 600²A x 3000⁴ / σ A 5800⁴

= 36 X 10⁴ x 3⁴ x 10¹² / 58⁴ x 10⁸

= 25.76 x 10⁸ x 10⁻⁵

= 25760 times .

4 0

3 years ago

Assume that white light is provided by a single source in a double-slit experiment. Describe the interference pattern if one sli

4vir4ik [10]

The answer to the given question above would be option D. If we assume that white light is provided by a single source in a double-slit experiment, the interference pattern if one slit is covered with a red filter and the other slit is covered with a blue filter is that, no <span>interference is observed because the two waves have different wavelengths. Hope this helps.</span>

3 0

3 years ago

The stoplight had just changed and a 2100 kg Cadillac had entered the intersection, heading north at 3.2 m/s , when it was struc

elena55 [62]

Explanation:

It is given that,

Mass of the Cadillac, $m_1=2100\ kg$