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xz_007 [3.2K]
3 years ago
8

If mass of gold is 123.4g and its volume is 12.1cm cube, calculate its density

Physics
1 answer:
maxonik [38]3 years ago
3 0

Answer:

10.198 g/cm³

Explanation:

ρ=m/V=123.4/12.1=10.198 g/cm³

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An object accelerates from rest with a constant acceleration of 7.5 m/s2. How fast will it
Serhud [2]

Answer:

13.4 m/s

Explanation:

Given:

Δx = 12 m

v₀ = 0 m/s

a = 7.5 m/s²

Find: v

v² = v₀² + 2aΔx

v² = (0 m/s)² + 2 (7.5 m/s²) (12 m)

v ≈ 13.4 m/s

8 0
3 years ago
Many flashlights are powered by a stack of batteries that are slid into the end of the flashlight one after another. Suppose you
Basile [38]

Answer:

The current through the bulb when the flashlight is turned on is 0.55 A.

Explanation:

Given that,

You have a flashlight that takes four ideal 1.5 V batteries, voltage of the flashlight, V = 6 V

The resistance of bulb, R = 11 ohms

We need to find the current through the bulb when the flashlight is turned on. As per Ohms's law :

V = IR

I=\dfrac{V}{R}\\\\I=\dfrac{6\ V}{11\ \Omega}\\\\I=0.55\ A

So, the current through the bulb when the flashlight is turned on is 0.55 A. Hence, this is the required solution.                

6 0
3 years ago
Lithium (Li) has a charge of +1, and oxygen (O) has a charge of –2. Which is the chemical formula? LiO2 LiO Li2O Li2O2
LiRa [457]

Answer:

The results is                  Li₂O

Explanation:

n a chemical reaction, the electron miner in the formula must be balanced, that is, the number of positive and negative charges is the same

In this case, oxygen has a valence of -2 that is, it can give two electrons and lithium has a valence of +1, therefore two lithium atoms are needed for the charges to be neutral, therefore the chemical formula is

The results is                  Li₂O

6 0
3 years ago
Read 2 more answers
How to do this question?​
Zigmanuir [339]

Answer:

First.

  • Find double diffrenciation of all equation
  • Then put the value of t in the differenciated equations
3 0
3 years ago
What’s the answer???
inna [77]

Answer: ( 2nd ) ( 3 )

Explanation:

4 0
3 years ago
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