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3 years ago

Help pls i give brainielest

Physics

1 answer:

Murrr4er [49]3 years ago

4 0

Answer:

mixtures

Explanation:

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As a glacier melts, the volume V of the ice, measured in cubic kilometers, decreases at a rate modeled by the differential equat

vovangra [49]

Solve the differential equation:

dV/dt = k V → 1/V dV/dt = k

→ d/dt [ln(V)] = k

→ ln(V) = k t + C

→ V (t )= exp(k t + C ) = C exp(k t ) = C e ᵏᵗ

At t = 0, the glacier has volume 400 km³ of ice, so

V (0) = 400 → C e⁰ = C = 400

Find when the glacier's volume is 300 km³:

V (t ) = 400 e ᵏᵗ = 300 → e ᵏᵗ = 3/4

→ k t = ln(3/4)

→ t = 1/k ln(3/4)

At this time, the volume is decreasing at a rate of 15 km³/yr, so

V ' (t ) = C k e ᵏᵗ → V ' (1/k ln(3/4)) = 400 k exp(k × 1/k ln(3/4)) = -15

→ 3/4 k = -3/80

→ k = -1/20

Then the volume V (t ) of the glacier at time t is

V (t ) = 400 exp(-1/20 t )

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3 years ago

When living things use chemical reactions to break down food, some of the energy is transformed into

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The answer is (D) Waste.

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3 years ago

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How did black holes get their name

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In 1967, John Wheeler invented the name "black hole" for the first time. However, there is no unified naming system for black holes.

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What is the biggest star in our universe?

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VY Canis Majoris is the largest star ever discovered.

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3 years ago

A glass falls from a table top and smashes on the floor 0.6 seconds later. How high is the table?

soldi70 [24.7K]

Answer:

1.8 m

Explanation:

Given: Glass falls from a table, smashes 0.6 seconds later

To find: How high a table is

Formula: Vv=gt, dv=1/2gt^2, t=2d/g

Solution: A table's height is measured from the top of the edge down to the floor. The tables are shown both have a height of 30 inches, which is common for many tables.

Data

t = 0.6s

g = 9.81 m/s²

d = ?

Equation

d = $\frac{1}{2}$ $gt$ ²

Math & Units

d = 4.905 (0.6²)
d = 442.676

Hence the table is 1.8 m high

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3 years ago