Does ice melt faster in water or air

Waves A and B have the same speed, but wave A has a shorter wavelength. Which wave has the higher frequency?

Nuetrik [128]

Frequency and wavelength are inversely proportional.
A shorter wavelength implies a higher frequency.

3 0

3 years ago

Newton’s second law of motion can also be described as _____.

anzhelika [568]

Answer:

F=ma

Explanation:

The Newton's laws of motion tries to explain the how bodies behave and the energy changes when theys are in motion. For the 3 of them to hold, the bodies must be moving in a straight line and with constant velocity.

The second one states that, "the change of momentum of a moving body is directly proportional to the force producing it and it takes place to the direction of force."

From the choices given, the appropriate answer is F=ma

3 0

3 years ago

Any force that causes an object to move in a circle is called a(n)

Vaselesa [24]

A). balanced force
b). unbalanced force
There's no such thing as either of these. A group of two or more forces can be balanced or unbalanced. A single force can't be.

c). gravitational force ... doesn't cause an object to move in a circle;
   Drop a stone from the roof of a tall building and watch it fall.
   It goes straight down, not in a circle.

d). centripetal force ... force directed toward the center of a circle,
   causes an object to move in a circle.

8 0

3 years ago

Read 2 more answers

Calculate the electrostatic force that a small sphere A, possessing a net charge of 2.0 x 10^-6 Coulombs exerts on another small

Anni [7]

Answer:

F = 5.33*10^-4N

Explanation:

to find the electrostatic force you use the Coulomb's law, given by the formula:

$F=k\frac{q_Aq_B}{r^2}$

k: Coulomb's constant = 8.89*10^9 Nm^2/C^2

q_a: charge of A = 2.0*10^{-6}C

q_B: charge of B = -3.0*10^{-6}C

r: distance between the spheres = 10.0m

By replacing all these values you obtain:

$F=(8.89*10^9Nm^2/C^2)\frac{(2.0*10^{-6}C)(-3.0*10^{-6}C)}{(10.0m)^2}=5.33*10^{-4}N$

hence, the forcebetween the spheres is about 5.33*10^-4N

3 0

3 years ago

Good morning! someone please answer this, ill give you brainliest and your earning 50 points.

wariber [46]

One step of copper mining requires blasting ore to be able to blasted and extracted from mine.

This process causes harm to the Geosphere (Lithosphere)
In this step, they blast the mines inside the earth. Which causes destruction and harm to the geosphere.
We know that, land comes under Geosphere also known as Lithosphere.

Mercury is used to recover minute pieces of gold that is mixed in soil and sediment. Sometimes Mercury can be lost in this process resulting in widespread contamination of local rivers and lakes.

This causes harm to the Hydrosphere.
The portion of earth covered with water is known as hydrosphere.
Since, The Mercury is getting mixed with the water. It is polluting the water that is the hydrosphere.

Hundreds of tons of rock are unearthed, moved and crushed in mining operation significantly increasing the amount of dust and particulates in the air.

This causes harm to the Atmosphere.
The particles of dust get increased in air and eventually gets mixed and spread everywhere.
The air is getting polluted which means the atmosphere is getting harmed.

Strip mining (also known as mountaintop removal) involves scraping away earth and rocks to get to coal buried near the surface. This often results in the destruction of ecosystems.

This causes harm to the Biosphere.
The biosphere consists of plants and animals. And these plants and animals collectively form a habitat called ecosystem.
When a ecosystem is destroyed, the biosphere is harmed.

8 0

3 years ago