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2 years ago

Which characteristic should a good scientific question have?

Physics

2 answers:

Brilliant_brown [7]2 years ago

7 0

The best answer to this question is D. a god scientific question should be based on observations instead of just imagination.

Hope this helps.

cricket20 [7]2 years ago

6 0

It should lead to a hypothesis that is testable.

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Cassie lives two miles away from school. Which mode of transport could benefit her health?

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B.) Riding a bicycle to school.

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3 years ago

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A 1,790 W toaster, a 1,480 W electric frying pan, and a 60 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (Th

amid [387]

Answer: ur mom

Explanation:

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2 years ago

What is the weight in Newtons of a ball with a mass of 7.77 kg?

rusak2 [61]

Answer:

76.1N

Explanation:

Given parameters:

Mass of the ball = 7.77kg

Unknow:

Weight of balloon = ?

Solution:

Weight is the vertical force applied on a body.

Weight = mass x acceleration due gravity

So;

Weight = mass x acceleration due to gravity

So;

Weight = 7.77 x 9.8 = 76.1N

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2 years ago

If the Earth was the size of a basketball, about 24 centimeters in diameter, about how thick is the Earth's crust?

zalisa [80]

C)yea there you go hope that helped

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2 years ago

SHOW WORK

Helga [31]

Answer:

Follows are the solution to the given question:

Explanation:

For point a:

$T= 2\pi \sqrt{\frac{m}{k}}\\\\k = \frac{4 \pi^2 m}{T^2}\\\\= \frac{4 \times (3.14)^2 \times 3}{2^2}\\\\=29.578 \ \frac{N}{m}\\\\$

For Point b:

$E=\frac{1}{2} m a^2 w^2\\\\$

$=\frac{1}{2} \times m \times a^2 \times \frac{4\pi^2}{T^2}\\\\=\frac{1}{2} \times 3 \times (0.15)^2 \times \frac{4\times 3.14^2}{2^2}\\\\=0.332 \ J$

For Point C:

$V_{max}= a w$

$= (0.15) \times \frac{2\pi}{T}\\\\= (0.15) \times \frac{2\times 3.14}{2}\\\\=0.471 \frac{m}{s}$

For point D:

$X= a \sin (wt+ \phi)\\\\0.91=0.15 \sin(\frac{2\pi}{T} \times t+\phi)\\\\0.91=0.15 \sin(\frac{2\times 3.14}{2} \times 0.5+\phi)\\\\0.60 = \sin(3.14 \times 0.5+\phi)\\\\0.60 = \sin(1.57+\phi)\\\\1.57 +\phi =\sin^{-1} 60^{\circ}\\\\1.57 +\phi = 36.86^{\circ}\\\\=35.29^{\circ}\\\\So, X=15 \sin(3.14t+35.29^{\circ}) \ cm$

5 0

2 years ago