1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kirza4 [7]
3 years ago
11

Alice and Marge are studying the properties of matter. The girls placed some an iron nail in a beaker containing water. Iron is

a solid metal at room temperature. Iron is a shiny and malleable; it can be formed into shapes like the nails the girls used. Iron will turn reddish-brown in the presence of air or water as it rusts. Iron is a good conductor of electricity and heat. After 48 hours, the girls checked the nail in the water and compared it to the nail they left on the lab bench. Here is a photo of their results.
Based on the girls' experiment, what is a chemical property of iron?
Physics
1 answer:
tatuchka [14]3 years ago
7 0

Answer:

When substances made of iron are exposed to oxygen and moisture (water), rusting takes place. Rusting removes a layer of material from the surface and makes the substance weak. Rusting is a chemical change.

You might be interested in
A small charged sphere is attached to a thread and placed in an electric field. The other end of the thread is anchored so that
Katyanochek1 [597]

To find the magnitude and direction of the electric field, let us find the horizontal and vertical components of the field separately, then we will use those values to calculate the total magnitude and direction.

The tension in the thread is 6.57×10⁻²N and the thread is aligned horizontally, so the tension force is directed entirely horizontally. The sphere is in static equilibrium, therefore the horizontal component of the electrostatic force acting on the sphere, Fx, must act in the opposite direction of the tension and have a magnitude of 6.57×10⁻²N. We know this equation relating a charge, an electric field, and the force that the field exerts on the charge:

F = Eq

F is the electric force, E is the electric field, and q is the charge

Let us adjust the equation for only the horizontal components of the above quantities:

Fx = (Ex)(q)

Fx is the horizontal component of the electric force and Ex is the horizontal component of the electric field.

Given values:

F = 6.57×10⁻²N

q = 6.80×10³C

Plug in these values and solve for Ex:

6.57x10⁻² = Ex(6.80×10³)

<u>Ex = 9.66×10⁻⁶N/C</u>

<u />

Since the sphere is in static equilibrium, the vertical component of the electrostatic force acting on the sphere, Fy, must have the same magnitude and act in the opposite direction of the sphere's weight. If we assume the weight to act downwards, then Fy must act upward.

We know the weight of the sphere is given by:

W = mg

W is the weight, m is the mass, and g is the acceleration of objects due to earth's gravity field near its surface.

We also know this equation:

F = Eq

Let us adjust for the vertical components:

Fy = (Ey)(q)

Set Fy equal to W and we get:

(Ey)(q) = mg

Given values:

q = 6.80×10³C

m = 0.018kg

g = 9.81m/s²

Plug in the values and solve for Ey:

(Ey)(6.80×10³) = 0.018(9.81)

<u>Ey = 2.60×10⁻⁵N/C</u>

<u />

Let's now use the Pythagorean theorem to find the total magnitude of the electric field:

E = \sqrt{Ex^{2}+Ey^{2}}

E = 2.77×10⁻⁵N/C

The direction of the electric field is given by:

θ = tan⁻¹(Ey/Ex)

θ = 20.4° off the horizontal

4 0
3 years ago
Pls help its about baseball and energy <br><br><br> (one question)<br><br><br><br> '^'
avanturin [10]
The answer would be A. As the bat is swung, it gains kinetic energy. But once it hits the ball, it loses, or transfers, it’s kinetic energy to the ball.
5 0
3 years ago
What is a situation in which friction is helpful?
bagirrra123 [75]
When driving a car on the road
8 0
3 years ago
3. Discuss the main purpose of Experiment" Explain the greatest advantage of experiment in psychology?
Scrat [10]

Answer:

Social psychologists utilize experimental techniques to study how people are influenced by groups. Health psychologists rely on experimentation and research to better understand the factors that contribute to wellness and disease.

Explanation:

7 0
3 years ago
Rearrange the formula F=ma, and solve for the variable (a)
jeyben [28]

Answer:

a = F/m

Explanation:

So we have to isolate a, in order to do this we need to move m to the other side, and we do that by diving both sides by m, resulting in a = F/m

7 0
3 years ago
Other questions:
  • Describe the cyclic patterns of lunar phases and eclipses of the Sun and moon.
    8·1 answer
  • Suppose a 60.0-kg gymnast climbs a rope. (a) what is the tension in the rope if he climbs at a constant speed? (
    14·2 answers
  • The element in a fluorescent lightbulb that absorbs UV light and releases visible light energy is ____?
    9·2 answers
  • A pendulum has 573 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom o
    13·1 answer
  • The stoplights on a street are designed to keep traffic moving at 24 mi/h. The average length of a street block between traffic
    15·1 answer
  • If we use _______ to build the walls and floors of the house, then the temperature inside the house will remain cooler. (Wood,Cl
    5·2 answers
  • PLZ HELPPP
    12·2 answers
  • Why does jake get shocked when he touches the top on the plastic slide but Jacob doesn’t get shocked when he touches the undersi
    10·2 answers
  • What was your favorite thing to learn in physics
    8·1 answer
  • Somebody tell me what the answer is please
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!