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liq [111]
4 years ago
10

4. What information does the atomic number of an element give us?

Physics
1 answer:
bulgar [2K]4 years ago
5 0

Answer: It gives us the identity of the element as well as the number of protons.

Explanation:

Because the number of protons is specific for each element, we can determine what element we are looking at just by the atomic number. For example the element with the atomic number of 1 is Hydrogen, atomic number of 2 is Helium, atomic number of 3 is Lithium and so forth.

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The most likely models of the planet Mercury indicate that more than half the planet may be composed of________.
Oxana [17]

Answer:

iron

Explanation:

4 0
3 years ago
A conveyer belt moves a 40 kg box at a velocity of 2 m/s. What is the kinetic energy of the box while it is on the conveyor belt
ankoles [38]
Kinwtic energy = (40kg*2*2)/2=40*2=80J
4 0
4 years ago
Read 2 more answers
if you drop a softball from just above your knee, the kinetic energy of the ball just before it hits the ground is about 1 jule,
ipn [44]
False.

The mass of a softball is approximately 200 g (0.2 kg), while the knees are located approximately at 30 cm (0.3 m) from the ground. It means that the gravitational potential energy of the ball when it is dropped is
U=mgh=(0.2 kg)(9.81 m/s^2)(0.3 m)=0.6 J

This corresponds to the total mechanical energy of the ball at the moment it is dropped, because there is no kinetic energy (the ball starts from rest). Then the ball is dropped, and just before it hits the ground, all this energy is converted into kinetic energy: but energy cannot be created, so its final kinetic energy cannot be greater than 0.6 J.
7 0
3 years ago
Please somebody help i took screenshot ik there is a blank space but look down a little
Dahasolnce [82]

Answer:

Force has a direct relationship to mass and acceleration. Newton's Second Law, force equals mass times acceleration (F=MA), illustrates their general relationship in an equation.

Explanation:

Relationships to remember:

  • <u>Force</u> and <u>acceleration</u> have a direct relationship, meaning if force increases, acceleration will also increase and vice versa

(Ex: The harder you push a box, the faster it will move)

  • <u>Mass</u> and <u>acceleration</u> have an inverse relationship, meaning if mass increases, acceleration will <em>decrease</em> and vice versa

(Ex: If you add more furniture in the back of a moving company truck, the truck will move slower than it did before the furniture was added)

  • <u>Force</u> and <u>mass</u> have a direct relationship, meaning if mass increases, force will also increase

(Ex: You will need to exert less force to lift a 5-pound weight than a 10-pound weight)

And of course, Newton's Second Law, F=MA sums all of this up in 3 letters and a symbol! If you have any more questions about this problem, please comment on my answer :)

6 0
3 years ago
Which would be the most reliable source of information to use for a history report
sukhopar [10]

A textbook but if there none to good use try google

3 0
3 years ago
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