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vova2212 [387]
3 years ago
5

Science is two things. Describe what those two things are.

Physics
1 answer:
fiasKO [112]3 years ago
7 0
Science is first the comprehensive study of the natural and physical environment. (that's like Biology, anatomy, and mathematics )

Science is second the body of knowledge based on facts and principles gained by scientific method (like experiments and observations)
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A 1.5m wire carries a 4 A current when a potential difference of 66 V is applied. What is the resistance of the wire?
kifflom [539]
Resistance = Voltage / current
Resistance = 66/4
=16.5ohms
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2 years ago
Tom kicks a soccer ball on a flat, level field giving it an initial speed of 20 m/s at an angle of 35 degrees above the horizont
SVEN [57.7K]

Answer:

(a) 2.34 s

(b) 6.71 m

(c) 38.35 m

(d) 20 m/s

Explanation:

u = 20 m/s, theta = 35 degree

(a) The formula for the time of flight is given by

T = \frac{2 u Sin\theta }{g}

T = \frac{2 \times 20 \times Sin35 }{9.8}

T = 2.34 second

(b) The formula for the maximum height is given by

H = \frac{u^{2} \times Sin^{2}\theta }{2g}

H = \frac{20^{2} \times Sin^{2}35 }{2 \times 9.8}

H  = 6.71 m

(c) The formula for the range is given by

R = \frac{u^{2} \times Sin 2\theta }{g}

R = \frac{20^{2} \times Sin 2 \times 35}{9.8}

R = 38.35 m

(d) It hits with the same speed at the initial speed.

8 0
3 years ago
When is a zero not significant?
maria [59]

Answer:

Not between significant digits.

Explanation:

A zero not significant when it's not between significant digits.

8 0
3 years ago
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A train travels 77 kilometers in 4 hours, and then 76 kilometers in 2 hours. What is its average speed?
Masja [62]

( (77/4) + 76/2 )/2 = 28.625 km/h is what i got

4 0
3 years ago
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