1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Leni [432]
3 years ago
6

A swimmer is capable of swimming at 1.4m/s in still water. a. How far downstream will he land if he swims directly across a 180m

wide river? b. How long will it take him to reach the other side.
Physics
2 answers:
ozzi3 years ago
8 0

Answer:

t = 180 / 1.4 = 129 sec   (time to swim horizontally across river)

S = 129 sec * V     where V is speed of current and S is the distance he will be carried downstream

The problem does not specify V the speed of the river

vredina [299]3 years ago
5 0

Answer:

Explanation:

From the given information:

a) the distance(D) showing how dar downstream he will land can be computed as follows:

Assuming the current of the river = 0.2 m/s

D = \dfrac{180 \ m \times 0.2 \ m/s}{1.4 \ m/s}

D = 36 m ÷ 1.4

D = 25.71 m

The required time (t) to reach the other side is:

time (t) = 180 m/ 1.4 m/s

time (t) = 128.57 seconds

You might be interested in
The Moon orbits Earth in an average of p = 27.3 days at an average distance of a =384,000 kilometers. Using Newton’s version of
Korvikt [17]

Answer:

The mass of the earth, M=6.023\times 10^{24}\ kg

Explanation:

It is given that,

Time taken by the moon to orbit the earth, T=27.3\ days=2358720\ m

Distance between moon and the earth,r=384000\ km=384\times 10^6\ m

We need to find the mass of the Earth using Kepler's third law of motion as :

T^2=\dfrac{4\pi^2}{GM}r^3

M=\dfrac{4\pi^2r^3}{T^2G}

M=\dfrac{4\pi^2\times (384\times 10^6)^3}{(2358720)^2\times 6.67\times 10^{-11}}

M=6.023\times 10^{24}\ kg

So, the mass of the earth is 6.023\times 10^{24}\ kg. Hence, this is the required solution.

7 0
3 years ago
What happens when an atoms losses an electron-
inysia [295]
It becomes positive
8 0
2 years ago
Is platinum carbonate naturally occurring or human made?
skad [1K]

Answer:

no

Explanation:

Platinum is a noble metal. The concentrations of platinum in the soil, water and air are very minimal. ... Finally, a danger of platinum is that it can cause potentiation of the toxicity of other dangerous chemicals in the human body, such as selenium.

6 0
3 years ago
Dust settling out of the air<br> chemical change or physical change
mars1129 [50]
Physical changes: melting, evaporating, and condensation. This is a physical change.
7 0
3 years ago
Read 2 more answers
Find the pressure if a force of 2N is applied to an area of 0.00004m^2
BigorU [14]

Answer:

5 x 10^4 N/m^2

Explanation:

Pressure, force and area are related witg the following equation;

Pressure = Force /Area

From the question, we obtained the following information;

Force = 2N

Area = 0.00004m^2

Pressure =?

Pressure = Force /Area

Pressure = 2/0.00004

Pressure = 5 x 10^4N/m^2

3 0
3 years ago
Other questions:
  • While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffi
    12·1 answer
  • A small toy car travels 2.0 meters in 120 seconds. what is the speed of the car?
    6·1 answer
  • A 331 N stoplight is hanging in equilibrium from cables as shown. The tension in the right cable is 550 N, and it makes an angle
    7·1 answer
  • In a domestic electric circuit (220.V),an electric kettle of 3kW power rating is operatedthat has a current rating of 4A. What r
    9·1 answer
  • What parts go in the center of the atom?
    5·1 answer
  • A block of mass 0.250 kg is placed on top of a light, vertical spring of force constant 5 000 N/m and pushed downward so that th
    6·1 answer
  • 1. A dog of mass 5 kg jumps on a table of mass 30 kg. As the dog walks around on the table, what is the average force that the t
    12·1 answer
  • Why dont you fall through walls when you lean against them? provide a scientific explanation to explain your answer.​
    14·1 answer
  • A quantity that is fully described by magnitude alone is a ___________ quantity. A quantity that is fully described by both magn
    11·1 answer
  • In what situations do newtons laws of motion not apply
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!