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3 years ago

5

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

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
Pls mark as brainliest

3 0

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.

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3 years ago

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What tool is used to measure air pressure?

alukav5142 [94]

A<span> barometer is used to measure air pressure. </span>

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3 years ago

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

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3 years ago