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4 years ago

How many significant figures does 56030 have? 3 4. 5 6

Physics

2 answers:

Gre4nikov [31]4 years ago

8 0

The correct answer is 4

natulia [17]4 years ago

7 0

Answer:4

Explanation:

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Help me pls its for my science class i need to show my work

Lostsunrise [7]

Answer:

P = 5880 J

Explanation:

Given that,

The mass of the block, m = 30 kg

The block is sitting at a height of 20 m.

The block will have gravitational potential energy. The formula for gravitational potential energy is given by :

$P=mgh\\\\=30\times 9.8\times 20\\\\=5880\ J$

So, the required potential energy is equal to 5880 J.

6 0

3 years ago

How long does it take an airplane to fly 1200 miles if it maintains a speed of 300 miles per hour

sdas [7]

Answer:

The answer is

Explanation:

To find the time taken we use the formula

$t = \frac{d}{v} \\$

where

d is the distance covered

v is the velocity

t is the time

From the question

d = 1200 miles

v = 300 mi/hr

We have

$t = \frac{1200}{300} = \frac{12}{3} \\$

We have the final answer as

Hope this helps you

5 0

3 years ago

If Superman really had x-ray vision at 0.12 nm wavelength and a 4.1 mm pupil diameter, at what maximum altitude could he disting

iVinArrow [24]

Answer:

Maximum altitude to see(L) = 1.47 × 10⁶ m (Approx)

Explanation:

Given:

wavelength (λ) = 0.12 nm = 0.12 × 10⁻⁹ m

Pupil Diameter (d) = 4.1 mm = 4 × 10⁻³ m

Separation distance (D) = 5.4 cm = 0.054 m

Find:

Maximum altitude to see(L)

Computation:

Resolving power = 1.22(λ / d)

D / L = 1.22(λ / d)

0.054 / L = 1.22 [(0.12 × 10⁻⁹) / (4 × 10⁻³ m)]

0.054 / L = 1.22 [0.03 × 10⁻⁶]

L = 0.054 / 1.22 [0.03 × 10⁻⁶]

L = 0.054 / [0.0366 × 10⁻⁶]

L = 1.47 × 10⁶

Maximum altitude to see(L) = 1.47 × 10⁶ m (Approx)

8 0

3 years ago

What is the primary function of earth's atmosphere (1 point)?

lana66690 [7]

<span>Without the atmosphere that protects the Earth, humans, animals and all plant life would not be able to survive. The atmosphere works to hold oxygen in the area around the earth. Humans and most animals are dependent on oxygen. Plants are also dependent on oxygen because they take the leftover carbon dioxide from humans when they inhale the oxygen.</span>

5 0

3 years ago

airplane in flight has a pressure difference between the lower and upper wing surface; this provides an upward force that balanc

Dvinal [7]

Answer:

4523.17365 Pa

Explanation:

m = Mass of plane = 77000 kg

F = Force = Weight = $mg$

g = Acceleration due to gravity = 9.81 m/s²

A = Total area of wings = 167 m²

The pressure difference would be

$\Delta P=\dfrac{F}{A}\\\Rightarrow \Delta P=\dfrac{77000\times 9.81}{167}\\\Rightarrow \Delta P=4523.17365\ Pa$

The pressure difference required to keep the plane aloft is 4523.17365 Pa

3 0

3 years ago