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andrezito [222]
2 years ago
7

Which metals have similar chemical properties? Check all that apply.

Physics
2 answers:
galina1969 [7]2 years ago
7 0
Barium, beryllium, radium, and calcium.
Alika [10]2 years ago
3 0

Answer:

yes

Explanation:

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A weight trainer lifts a 90.0-kg barbell from a stand 0.90 m high and raises it to a height of 1.75 m. What is the increase in t
nirvana33 [79]

Answer:

∆PE = 749.7 J

At 0.9 m high, PE = 793.8 J

At 1.75 m high, PE = 1543.5 J

7 0
2 years ago
If you swim with the current in a river, your speed is increased by the speed of the water; if you swim against the current, you
Blababa [14]

Answer:

11.23%

Explanation:

Lets take

Speed of man in still water =u= 1.73 m/s

Speed of flow of water = v=0.52 m/s

When swims in downward direction then speed of man = u + v

When swims in upward direction then speed of man = u - v

Lets time taken by man when he swims in downward direction is t_1 and when he swims in downward direction is t_2

Lets distance is d and it will be remain constant in both the case

d=(u+v)t_1

d=(u-v)t_2

(1.73+0.52)t_1=(1.73-0.52)t_2

t_2=1.85t_1

Time taken in still water

2 d= t x 1.73

t=1.15 x d sec

t_1=0.44d\ sec

t_2=0.82d\ sec

total time in current = 0.82 +0.44 d=1.26 d sec

So the percentage time

percentage\ time =\dfrac{1.28-1.15}{1.15}

 Percentage time =11.32%

So it will take 11.32% more time as compare to still current.

5 0
3 years ago
The solar system consists of the sun and nine planets moving in definite orbits around the sun. How do the outer planets differ
8090 [49]
I believe the answer is D) and also there are technically 8 planets because Pluto was considered a dwarf planet so they dont consider it a planet at all
4 0
3 years ago
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During a test, what can a student use to identify what type and how many atoms are in a chemical compound?
11111nata11111 [884]

Answer:

C- ths answer is the letter C

5 0
3 years ago
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A chemical equation where the number of atoms of each element are the same on both sides. Coefficients are often needed to balan
rusak2 [61]

Answer:

A balanced equation

Explanation:

when atoms of various elements or compounds react, they do this in mole ratio. It is a law to always balance the number of elements of each element on the reactant side to the corresponding elements on the product side of the equation. This is done by the introduction of coefficients.

6 0
3 years ago
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