All categories

4 years ago

Which describes static electricity?

1 answer:

3 0

Pulling a sweater over your head and causing your hair to stand up is a prime example of static electricity.
Any time that electricity is transferred from the surface of an object, static electricity is in affect.

You might be interested in

What are mixtures that have evenly mixed groups of particles that do not settle out called?

Kipish [7]

This is called a Solution

6 0

4 years ago

How does Gregor Mendel's work with pea plants affect human life today? OA A. People continue to cross pea plants to fix Mendel's

lana [24]

Answer:

Explanation:

Not sure, but that one makes the most since

4 0

3 years ago

Assume that a daily diet of 2000 calories (i.e. 8.37 x 106 J) is converted completely to body heat.

slava [35]

Answer:

(a) the mass of the water is 3704 g

(b) the mass of the water is 199, 285.7 g

Explanation:

Given;

Quantity of heat, H= 8.37 x 10⁶ J

Part (a) mass of water (as sweat) need to evaporate to cool that person off

Latent heat of vaporization of water, Lvap. = 2.26 x 10⁶ J/kg

H = m x Lvap.

$m = \frac{H}{L._{vap}} =\frac{8.37 * 10^6.J}{2.26*10^6\ \frac{J}{kg}} = 3.704 \ kg$

mass in gram ⇒ 3.704 kg x 1000g = 3704 g

Part (b) quantity of water raised from 25.0 °C to 35.0 °C by 8.37 x 10⁶ J

specific heat capacity of water, C, 4200 J/kg.°C

H = mcΔθ

where;

Δθ is the change in temperature = 35 - 25 = 10°C

$m =\frac{H}{c* \delta \theta} = \frac{8.37 *10^6}{4200*10} = 199.2857 kg$

mass in gram ⇒ 199.2857 kg x 1000 g = 199285.7 g

5 0

3 years ago

Why can characteristics properties be used to identify unknown substances

frozen [14]

Characteristic properties are used because the sample size and the shape of the substance does not matter.

5 0

3 years ago

Atomic radius increases as you move down a group of elements.

raketka [301]

Yes, the atomic radius increases as you move down a group of elements. this is true
going down leads to valence electrons that are further away from nucleus -> less electrostatic attraction -> less pull towards nuc. -> greater radius/volume taken

3 0

3 years ago