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4 years ago

Not Physics!!! Philosophy!!!

Physics

1 answer:

irina1246 [14]4 years ago

5 0

Answer:

The ideas resemble their causes are the ideas of: Primary qualities: texture, number, size, shape, motion.

Explanation:

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A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it

Thepotemich [5.8K]

Answer:

The density of rock = 3.37 g/cm³

Explanation:

Density: Density can be defined as the ratio of the mass of a body to the volume. The S.I unit of density is kg/m³. It can be expressed mathematically as ,

D = M/V............................................... Equation 1

Where D = density of the body, M = mass of the body, V = volume of the body.

From Archimedes' principle, a body will displace a volume of water equal to its volume.

Therefore, Volume of the object = volume of water displaced

Given: M = 300 g, V = volume of water displace = 89.0 cm³.

Substituting these values into equation 1

D = 300/89

D = 3.37 g/cm³

The density of rock = 3.37 g/cm³

4 0

4 years ago

A car traveling with constant speed travels 150 km in 7200s what is the speed of the car

Oksana_A [137]

Velocity is distance/time

so 150/7200=.0208km/s

unless you have to convert it to miles or something else. but use the formula!

5 0

3 years ago

Ground infrared telescopes Versailles at high altitude and dry climate. What explains the location for those infrared telescopes

Natali5045456 [20]

Answer:

High altitude

Explanation:

Infrared rays are absorbed by water vapor in the lower parts of our atmosphere such as near the sea level.Infrared telescopes positioned on high mountains can observe the cosmos at a wavelength near-infrared. In this case, this telescope is positioned on a mountain top where the altitude is high.

3 0

3 years ago

Radar uses radio waves of a wavelength of 2.2 m . The time interval for one radiation pulse is 100 times larger than the time of

liq [111]

Answer:

The shortest distance to an object that this radar can detect would be

111 m

Explanation:

The shortest distance is the minimum distance that would be detected by the radar, The time of oscillation can be obtained thus;

T = 1/f ..........1

but f= v/λ substituting f into equation 1 we have;

T = λ/v...............2

Where λ is the wavelength = 2.2 m

v is the velocity of light since the radar is an electromagnetic wave

= 3 x $10^{8}$ m/s

T = 2.2 m / 3 x $10^{8}$ m/s

T = 7.33 x $10^{-9}$ s

Calculating the time interval required by the pulse

Since the interval of the pulse (t) is 100 times greater than the period of oscillation, the time of the pulse is expressed as;

t = 100 x T

t = 100 x 7.33 x $10^{-9}$ s

t = 7.33 x $10^{-7}$ s

Therefor the time of the pulse is 7.33 x $10^{-7}$ s

Calculating for the shortest distance of the radar

The shortest distance of the radar can be obtained using the equation below;

λ_s = (t/2) x v ............3

Substituting into equation 3 we have

λ_s = (7.33 x $10^{-7}$ /2) x 3 x $10^{8}$ m/s

λ_s = 111 m

Therefore the shortest distance to an object that this radar can detect would be 111 m

8 0

4 years ago

What is the answer to {36m= ? dm}

Andrew [12]

Answer:

360

Explanation:

just add a 0 when using dm

8 0

3 years ago