During a quiet eruption, a lava flow may set fire to and then bury everything in its path. true or false?

Biology

1 answer:

SCORPION-xisa [38]4 years ago

7 0

True, because lava is hot, and as far as I know, anything hot can burn.

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How many significant figures does this number have: 0.00506200?

OlgaM077 [116]

Answer:

Explanation:

The following rules apply when determining the number of significant figure that exists in the given number, 0.00506200

1. Every non-zero digit is a significant number. Therefore, 5, 6, and 2 are significant numbers.

2. Any zero found between 2 non-zero digit or significant numbers is considered a significant number. Therefore, the 0 between 5 and 6 is a significant number.

3. Any zero that appear to the left of a significant number is not a significant number. Therefore, the leading 0 before the decimal point, and the two zeros that come after the decimal point are not significant numbers.

4. Any trailing zero that comes after a decimal point to the right of any non-zero digit is considered significant. Therefore, the two zeros at the end of the decimal number, are significant figures.

Therefore, we can conclude that there are 6 significant figures in 0.00506200.

6 0

3 years ago

A 20-pound object is dropped from a 50-foot bridge onto the ground below it. A 50-pound object is dropped from a 100-foot cliff

ira [324]

The 50 pound object will reach the ground first.

Explanation:

Using the second equation of motion, we can derive the time taken for each of the object to reach the ground. As the object is thrown from the top of the bridge or cliff, acceleration due to gravity will be acting on them.

So, $s = ut+\frac{1}{2} at^{2}$

The value of s for the object thrown from 50 foot bridge is given as 50 ft. The initial velocity of the object will be zero. The acceleration can be written as the ratio of mass to gravitational force.

Then, $s = (0) t +\frac{1}{2}*\frac{m}{F}*t^{2}$

$50 = \frac{20}{2F} t^{2} \\\\t^{2} = \frac{100F}{20}$

$t = \sqrt{5F}$

Then, consider the time taken for the 50 pound object to reach the bottom of 100 ft cliff as t₁ and the displacement in this case is 100 ft.

Then, $100 = (0)t +\frac{1}{2}*\frac{50}{F}*t_{1}^{2} \\\\t_{1}^{2} =\frac{200F}{50}$

$t_{1} = 2 \sqrt{F}$

Since, the gravitational force acting on both the objects will be same, the ratio of time taken is

$\frac{t }{t_{1} }=\frac{\sqrt{5F} }{2\sqrt{F}} = \frac{\sqrt{5} }{2}$

So, the time taken for the 20 pound object to reach the ground of 50 ft bridge is √5 s =2.236 s and the time taken for the 50 pound object to reach the ground of 100 ft cliff is 2 s.

Thus, the 50 pound object will reach the ground first.

5 0

3 years ago

Which type of system would a tropical rainforest be?

GaryK [48]

1) A. Biological

2) D. Model

3) B. Cold

4 0

4 years ago

A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that has wrinkled seeds and the genotype rr

ratelena [41]

The answer is (c) 50 percent

6 0