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jok3333 [9.3K]
2 years ago
12

6) A boat crosses a river at a constant engine speed of 2.0 m/s under pointed Directly west. The river runs directly south at 2.

5 m/s. If the river is 126 meters wide, how long does it take the boat to cross the river?
7) If the pilot of the boat doesn't correct for the current, how far downstream will he land on the opposite shore?
Physics
1 answer:
TEA [102]2 years ago
8 0

Answer:ligma ;)

Explanation:

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Two cars are driving on a straight section of the interstate in opposite directions with 70 mph. They are one mile apart.
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They are trailing the same speed as it states in the question they are heeding toward each other a 70 mph <span />
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3 years ago
Brainlist nd 20 point
Alborosie

the same is the answer

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6 0
2 years ago
A water tower is a familiar sight in many towns. The purpose of such a tower is to provide storage capacity and to provide suffi
Mademuasel [1]

The image of the water tower and the houses is in the attachment.

Answer: (a) P = 245kPa;

(b) P = 173.5 kPa

Explanation: <u>Gauge</u> <u>pressure</u> is the pressure relative to the atmospheric pressure and it is only dependent of the height of the liquid in the container.

The pressure is calculated as: P = hρg

where

ρ is the density of the liquid, in this case, water, which is ρ = 1000kg/m³;

When it is full the reservoir contains 5.25×10⁵ kg. So, knowing the density, you know the volume:

ρ = \frac{m}{V}

V = ρ/m

V = \frac{5.25.10^{5}}{10^{3}}

V = 525 m³

To know the height of the spherical reservoir, its diameter is needed and to determine it, find the radius:

V = \frac{4}{3}.\pi.r^{3}

r = \sqrt[3]{ \frac{3}{4\pi } .V}

r = \sqrt[3]{\frac{525.3}{4\pi } }

r = 5.005 m

diameter = 2*r = 10.01m

(a) Height for House A:

h = 15 + 10.01

h = 25.01

P = hρg

P = 25.01.10³.9.8

P = 245.10³ Pa or 245kPa

(b) h = 25 - 7.3

h = 17.71

P = hρg

P = 17.71.1000.9.8

P = 173.5.10³ Pa or 173.5 kPa

4 0
2 years ago
Someone please help.
Anettt [7]

Answer:

B is the answer

Explanation:

7 0
2 years ago
2. An object of mass 20 kg is lifted to a 25 m building. How much potential energy is stored on the mass? (Take g= 10 m/s)​
butalik [34]

Explanation:

potential energy = mass × gravity force × height

=20 × 10 × 25

= 5000 joules

6 0
2 years ago
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