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Nuetrik [128]
3 years ago
9

Why are variables important in a science investigation?

Physics
1 answer:
Arte-miy333 [17]3 years ago
3 0
Because a variable is an important stratagy of science
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Jan ran 4 miles north in 28 minutes. What was Jan's average velocity?
fenix001 [56]

Answer:

3.83 m/s

Explanation:

Given that,

Distance covered by Jan, d = 4 miles

1 mile = 1609.34 m

4 miles = 6437.38 m

Time, t = 28 minutes = 1680 s

Jan's average speed,

v = d/t

v=\dfrac{6437.38\ \text{m}}{1680\ \text{s}}\\\\v=3.83\ \text{m/s}

Hence, the average velocity of Jan is 3.83 m/s.

6 0
3 years ago
An ice skater slides in a straight line across the ice. As she passes a certain point, her velocity is 24 km/hr. Two seconds lat
gulaghasi [49]
Acceleration = (change in speed) / (time for the change)

Change in speed = (later speed) - (earlier speed) = (13 - 24) = -11 km/hr
Time for the change = 2 seconds

Acceleration = (-11 km/hr) / (2 sec)

Acceleration = -5.5 km/hr-sec  (B)
5 0
2 years ago
How many 5 cm squares
Colt1911 [192]
5 cm squares make 1.9685
6 0
2 years ago
2.
krek1111 [17]

Answer:

c

Explanation:

a vector quantity has both magnitude and direction

6 0
2 years ago
Is there any difference between reflection and echo???
Fofino [41]

Answer:

reflection is the act of reflecting or the state of being reflected while echo is

reflection of sound waves from a surface back to the initial listener

6 0
3 years ago
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