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3 years ago

What is the line running through earth from pole to pole

Physics

2 answers:

Juliette [100K]3 years ago

8 0

Imaginary lines that run north and south map from pole to pole. meridians express degrees of longitued

Brut [27]3 years ago

6 0

The Longitutes are imagenary lines that run from the North pole to the South pole.

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Describe the difference between a scientific law and a scientific theory

Luda [366]

A scientific law is absolute, it cannot be proven wrong. A scientific theory is like a belief, it has been proven but can also be argued or disproven.

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4 years ago

Read 2 more answers

A 2.7-kg block slides with a speed of 1.1 m/s on a frictionless, horizontal surface until it encounters a spring.

IceJOKER [234]

Answer

given,

mass of block = 2.7 kg

speed of block = 1.1 m/s

a) spring compressed to distance of 6 cm or 0.06 m

using conservation of energy

kinetic energy is converted into spring energy

$\dfrac{1}{2}mv^2= \dfrac{1}{2}kx^2$

$k =\dfrac{ mv^2}{x^2}$

$k =\dfrac{2.7\times 1.1^2}{0.06^2}$

k= 907.5 N/m

b) again using conservation of energy

kinetic energy is converted into spring energy

$\dfrac{1}{2}mv^2= \dfrac{1}{2}kx^2$

$v =\sqrt{\dfrac{kx^2}{m}}$

$v=\sqrt{\dfrac{907.5\times 0.015^2}{2.7}}$

$v=\sqrt{0.075625}$

v= 0.275 m/s

8 0

3 years ago

Odyssey Quiz

Novosadov [1.4K]

Answer:

OD) 3.7 kg-m/s

Explanation:

given:

velocity of baseball, v = 25 m/s

angle below horizontal, Θ = $8^{o}$

mass of baseball, m = 0.15 kg

Generally, momentum (p) is given by equation:

p = mv

Horizontal component is given by

p = mv cosΘ

= 0.15 kg x 25 m/s x cos $8^{o}$

= 3.71 kg- m/s

Hence horizontal component of momentum is OD) 3.7 kg-m/s

4 0

4 years ago

A particle whose mass m=2 kg moves in the xy plane with a constant speed v= 3 m/s in the x direction along the line y = 5. What

Marianna [84]

Answer:

L= 30 kg.m²/s

Explanation:

Given that

m = 2 kg

v= 3 m/s along x direction

y= 5 m

As we know that

Linear momentum P

P = m v

The angular momentum is the moment of linear momentum.

So the angular momentum L

L = m v r

Here r= 5 m

By putting the values

L = m v r

L = 2 x 3 x 5 kg.m²/s

L= 30 kg.m²/s

5 0

3 years ago

A communications satellite orbiting the earth has solar panels that completely absorb all sunlight incident upon them. The total

Naddik [55]

Answer:

1) 14 kW

2) 4.67 x 10^-5 N

Explanation:

Area of solar panel = 10 m^2

Intensity of sun's radiation incident on earth = 1.4 kW/m^2

Solar power absorbed = ?

We know that the intensity of radiation on a given area is

$I$ = $\frac{P}{A}$

where I is the intensity of the radiation

P is the power absorbed due to this intensity on a given area

A is the area on which this radiation is incident

From the equation, we have

P = IA

P = 1.4 kW/m^2 x 10 m^2 = 14 kW

b) For a perfect absorbing surface, the radiation pressure is given as

p = I/c

where p is the radiation pressure

I is the incident light intensity = 1.4 kW/m^2 = 1.4 x 10^3 kW/m^2

c is the speed of light = 3 x 10^8 m/s

substituting values, we have

p = (1.4 x 10^3)/(3 x 10^8) = 4.67 x 10^-6 Pa

we know that Force = pressure x area

therefore force on the solar panels is

F = 4.67 x 10^-6 x 10 = 4.67 x 10^-5 N

6 0

3 years ago