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dedylja [7]
3 years ago
14

A cyclist travels 60 km in 2 hours .What is his average speed?

Chemistry
1 answer:
zysi [14]3 years ago
3 0

Explanation:

Mike drives his car 60 km in 55minutes. What is its average speed in kilometers per hour ? A train travels 120 km in 2 hours and 30 .

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Fill in the blank: You can find the number of __________ in any atom by subtracting the atomic number from the mass number.
Shtirlitz [24]
B is true if we subtract atomic number(the number of protons )from the mass number
we can find neutrons.
hope this helps
5 0
3 years ago
What substance can act as catalysts in the body?
pickupchik [31]

Answer:

Enzymes

Explanation:

Enzymes are proteins that can act as  catalysts in the body.

8 0
3 years ago
You are running a lemonade stand with your friend. You prepared 10 liters of 0.7 molarity lemonade, but your friend did online r
mr Goodwill [35]

Answer:

add 7.5L of water

Explanation:

M1×V1=M2×V2

M is molarity, V is volume

0.7 × 10 = 0.4 × V2

V2= 17.5L

vol. of water to add= 17.5 - 10 = 7.5L

7 0
3 years ago
How many trees must be harvested to treat one person
kirill115 [55]
There are 7 trees that have to be harvested 
8 0
4 years ago
53. A firefighter of mass 80 kg slides down a vertical pole
Zielflug [23.3K]

Answer:

Answer is given below:

Explanation:

<em>Given Data:</em>

mass = 80kg

acceleration = 4 ms

force = 800N

<em>Find out:</em>

friction = ?

<em>Formula</em><em>:</em>

F-friction = weight - f-net

<em>Solution:</em>

weight = (80)(10)

           = 800 N

F-net = ma =(80)(4) = 320N

F-friction = weight - F-net

               =800 N - 320N

               =480N

<em>Answer</em> :

Friction = 480 N

   

6 0
3 years ago
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