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3 years ago

14

A high-speed train in Japan travels a distance of 300. kilometers in 3.60 x 103 seconds. What is the average speed of this train

? (Turn the time into hours by using a unit conversion)

1 answer:

sergiy2304 [10]3 years ago

5 0

Answer:

The average speed is 83.3 m/s

Explanation:

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A block of mass 15.0 kg slides down a ramp inclined at 28.0∘ above the horizontal. As it slides, a kinetic friction force of 30.

AURORKA [14]

Answer:

Work is done by friction = -165 J

Explanation:

Given:

Mass of block (m) = 15 kg

Ramp inclined = 28°

Friction force (f) = 30 N

Distance (d) = 5.5 m

Find:

Work is done by friction.

Computation:

Work is done by friction = -Fd

Work is done by friction = -(30)(5.5)

Work is done by friction = -165 J

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3 years ago

Which term compares an objects mass to its volume

expeople1 [14]

Answer:

Density is the relationship between mass and volume.

D = M / V

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4 years ago

Which of the following statements describes an interaction between the atmosphere and biosphere?

Schach [20]

Answer:

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Explanation:

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3 years ago

A train moves from rest to a speed of 30 m/s in 32.0 seconds. What is its acceleration?

kramer

Answer:

0.94m/s (squared)

Explanation:

a=change in velocity/time

a=v-u/t

a=32-0=32/32

a=0.94m/s (squared)

6 0

3 years ago

A water strider bug is supported on the surface of a pond by surface tension acting along the interface between the water and th

Alik [6]

Answer:

minimum interface length = 1.36 mm

Explanation:

given data

weight of the bug = $10^{-4}$ N

solution

we will apply here Surface Tension formula that is

Surface Tension ,σ = Force ÷ length ........................1

and we consider here surface tension for water is 7.34 × $10^{-2}$ N/m

so that here minimum interface length needed to support the bug is

minimum interface length = Force ÷ σ

minimum interface length = $10^{-4}$ ÷ 7.34 × $10^{-2}$

minimum interface length = 1.36 mm

4 0

3 years ago