PHYSICS MIDDLE SCHOOL

Elements with atomic numbers 58 through 71 are part of what series?

Answers

Answer 1
Answer: Elements with atomic numbers 58 through 71 are part of the Lanthanide Elements
Answer 2
Answer:

Elements with atomic numbers from 58 through 71 are part of the

lanthanide series

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Where are the three parts of an atom located

Answers

An atom has an electron, proton, and a nucleus.

Electrons are negatively charged.
Protons are positively charged.
Neutrons are neutrally charged.

arrange the stars based on their temperature. begin with the coolest star, and end with the hottest star

Answers

Answer:

Temperature – cooler stars are red, warmer ones are orange through yellow and white. The hottest stars shine with blue light. Age – As a star ages it produces different chemicals which burn at different temperatures.

Bone-strengthening physical activity done _____ increases bone-mineral content and bone density in youth.

Answers

Hi!

The answer would be three days a week

Explanation

Bone-strengthening activity is key to ensuring that bones remain healthy to maintain an individual's lifestyle. The physical activity to strengthen bone may be brisk walking, exercises that include weights, or gymnastics to lift a few. The purpose of these activities are to observed to contribute to an increase in the bone mineral density of adolescents and children. Several studies have established that about 150 minutes a week for adults, or 3 days a week (60 minutes a day) for the youth should be devoted to bone strengthening physical activity to ensure good health of the body.


Hope this helps!

Answer:

three or more days a week

Explanation:

A train moving with a velocity of 87.1 km/hour North, increases its speed with a uniform acceleration of 0.250 m/s2 North until it reaches a velocity of 160.0 km/hour North. What distance did the train travel while it was increasing its velocity, in units of meters?

Answers

Answer:

2780 meters

Explanation:

First, convert km/hr to m/s.

87.1 km/hr × (1000 m / km) × (1 hr / 3600 s) = 24.2 m/s

160.0 km/hr × (1000 m / km) × (1 hr / 3600 s) = 44.4 m/s

Given:

v₀ = 24.2 m/s

v = 44.4 m/s

a = 0.250 m/s²

Find: x

v² = v₀² + 2a (x − x₀)

(44.4 m/s)² = (24.2 m/s)² + 2(0.250 m/s²) (x − 0 m)

x = 2780 m

There are two ways to transfer energy, by particle transfer and by wave. Give an example of each.

Answers

Particle transfer . . . . .
shoot a bullet at a pendulum to make it swing

Wave . . . . .
heat meatloaf in a microwave oven
when it's done, put it under an infrared lamp to keep it hot
By particle: heat conduct into materials
By wave: Sun heat that is transmitted by irradiation

Giving out 30 pionts PLEASE I NEED HELP RIGHT AWAYYYY!!!!!!!!!!!!!!!!choose the term that best completes each sentence
1.the higher the temperature of something, the greater its _______________
2. the change in state from gas to liquid is called_______________
3. energy that comes from bonds within matter is called_________________
4. the change in state from liquid to gas is called_____________
5. gas bubbles forming throughout the liquid is called_______________
6. liquid changing to gas only at the surface is called_________________
7. the change in state from solid to liquid is called____________
8. the change in state from liquid to solid is called____________
9. the___________states that during any change, the amount of energy stays the same
10. another term for a chemical change is a_____________
11. in____________, particles pass directly from solid to gas
words:
chemical energy
thermal energy
evaporation
melting
freezing
boiling
law of conservation
vaporization
condensation
sublimation
chemical reaction

Answers

1.the higher the temperature of something, the greater its thermal energy.
2. the change in state from gas to liquid is called evaporation.
3. energy that comes from bonds within matter is called chemical energy.
4. the change in state from liquid to gas is called vaporization.
5. gas bubbles forming throughout the liquid is called boiling.
6. liquid changing to gas only at the surface is called evaporation.
7. the change in state from solid to liquid is called melting.
8. the change in state from liquid to solid is called freezing.
9. the law of conservation states that during any change, the amount of energy stays the same
10. another term for a chemical change is a chemical reaction
11. in sublimation, particles pass directly from solid to gas

There ya go, Champ.  Now you have all the answers and you haven't
learned a thing.


the higher the temperature of something, the greater its thermal energy.
 the change in state from gas to liquid is called evaporation.
  energy that comes from bonds within matter is called chemical energy.
  the change in state from liquid to gas is called vaporization.
 gas bubbles forming throughout the liquid is called boiling.
  liquid changing to gas only at the surface is called evaporation.
  the change in state from solid to liquid is called melting.
 the change in state from liquid to solid is called freezing.
 the law of conservation states that during any change, the amount of energy stays the same
  another term for a chemical change is a chemical reaction
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