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4 years ago

What is a difference between a law and a hypothesis

1 answer:

4 0

Good evening, fellow late night studier!

So basically, a hypothesis is just a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. So then, a law is a statement about an observed phenomenon or a unifying concept. And that is the difference between the two.
If that makes any sense...
If you need further explanation, let me know!
~Brooke❤️

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Image formed in a concave

Hunter-Best [27]

Answer:

Explanation:

the image formed behind the mirrow= virtual

and the size of the image increase and upright

8 0

3 years ago

Please answer the question for gravitational field attached in the image.

goblinko [34]

We are given:

Radius of Venus= 6 * 10⁶ m

Height above the planet's ground = 9.4 * 10⁶ m

Mass of Venus = 4.867 * 10²⁴ kg

Finding the Gravitational Field:

We first need to calculate the distance between the center of masses

Distance between center of masses:

Since the point is above the surface of Venus, the radius of Venus and the height will add

Distance between the center of masses = 9.4*10⁶ + 6 * 10⁶

Distance (r) = 15.4 * 10⁶ m

Now back to Gravitational field!

We know the formula for Gravitational Field:

g = GM / r² [where g is the gravitational field, M is the mass of the planet, r is the distance between the center of masses and G is the gravitational constant]

plugging the known values in the formula:

g = (6.67 * 10⁻¹¹ * 4.867 * 10²⁴) / (15.4*10⁶)² [G = 6.67*10⁻¹¹ Nm²/kg²]

g = (32.46 * 10¹³) / (237 * 10¹²)

g = (32.46 * 10¹³) / (23.7 * 10¹³)

g = 32.46/23.7 [the 10¹³ got cancelled out]

g = 1.367 N/kg² (or m/s²)

7 0

3 years ago

A passenger plane is travelling down the runway with a speed of 20km/h, then speeds up with constant acceleration over 2.4km. Af

Ilia_Sergeevich [38]

Hope this answer helps m =)

6 0

4 years ago

You get a job delivering water. You calculate how much work is done picking up each 20 L bottle of

Phantasy [73]

Answer:

The work done by picking up 100 20-L bottles and raising it vertically 1 meter is 19614 joules.

Explanation:

By the Work-Energy Theorem, the work needed to raise vertically 100 bottles of water is equal to the gravitational potential energy, units for work and energy are in joules:

$\Delta W = \Delta U_{g}$ (1)

Where:

$\Delta W$ - Work.

$\Delta U_{g}$ - Gravitational potential energy.

The work is equal to the following formula:

$\Delta W = n\cdot \rho \cdot V \cdot g \cdot \Delta h$ (2)

Where:

$n$ - Number of bottles, dimensionless.

$\rho$ - Density of water, measured in kilograms per cubic meter.

$V$ - Volume, measured in cubic meters.

$g$ - Gravitational acceleration, measured in meters per square second.

$\Delta h$ - Vertical displacement, measured in meters.

If we know that $n = 100$ , $\rho = 1000\,\frac{kg}{m^{3}}$ , $V = 0.02\,m^{3}$ , $g = 9.807\,\frac{m}{s^{2}}$ and $\Delta h = 1\,m$ , then the work done is:

$\Delta W = (100)\cdot \left(1000\,\frac{kg}{m^{3}} \right)\cdot (0.02\,m^{3})\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (1\,m)$

$\Delta W = 19614\,J$

The work done by picking up 100 20-L bottles and raising it vertically 1 meter is 19614 joules.

6 0

3 years ago

How is the frequency of an electromagnetic wave related to energy

aivan3 [116]

Answer: The energy carried by an electromagnetic wave is proportional to the frequency of the wave.

Explanation:

Electromagnetic waves that are of higher energy than visible light (higher frequency, shorter wavelength) include ultraviolet light, X-rays, and gamma rays.

7 0

4 years ago