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
yuradex [85]
3 years ago
7

A kayaker needs to paddle north across a 85 m wide harbor. The tide is going out, creating a tidal current that flows to the eas

t at 2.0 m/s. The kayaker can paddle with a speed of 3.4 m/s.
(a) In which direction should he paddle in order to travel straight across the harbor?

(b) How long will it take him to cross?
Physics
1 answer:
marshall27 [118]3 years ago
8 0

Answer:

Explanation:

Let the direction in which he peddles makes an angle of θ with north across

Sinθ = 2 / 3.4

θ = 36 degree ( west of north )

b )

component of his velocity along the north = 3.4 cos 36

= 2.75 m /s

time required = 85 / 2.75 s

= 31 s

You might be interested in
Genes are found on DNA, which makes up chromosomes in the nucleus of a cell. True False
zheka24 [161]
The sentence is accurate, therefore TRUE is the answer.
7 0
3 years ago
Read 2 more answers
What is the massof the largest ruby?
alexandr402 [8]
I think the answer is 2283g
4 0
3 years ago
During a 980. miles cruise, a ship travelled 590 miles in 7 hours first. Then the ship changed its speed for the rest of the tri
vfiekz [6]

Explanation:

The average speed of a modern cruise ship is roughly 20 knots (23 miles per hour), with maximum speeds reaching about 30 knots (34.5 miles per hour).

7 0
2 years ago
Read 2 more answers
A +71 nC charge is positioned 1.9 m from a +42 nC charge. What is the magnitude of the electric field at the midpoint of these c
viva [34]

Answer:

The net Electric field at the mid point is 289.19 N/C

Given:

Q = + 71 nC = 71\times 10^{- 9} C

Q' = + 42 nC = 42\times 10^{- 9} C

Separation distance, d = 1.9 m

Solution:

To find the magnitude of electric field at the mid point,

Electric field at the mid-point due to charge Q is given by:

\vec{E} = \frac{Q}{4\pi\epsilon_{o}(\frac{d}{2})^{2}}

\vec{E} = \frac{71\times 10^{- 9}}{4\pi\8.85\times 10^{- 12}(\frac{1.9}{2})^{2}}

\vec{E} = 708.03 N/C

Now,

Electric field at the mid-point due to charge Q' is given by:

\vec{E'} = \frac{Q'}{4\pi\epsilon_{o}(\frac{d}{2})^{2}}

\vec{E'} = \frac{42\times 10^{- 9}}{4\pi\8.85\times 10^{- 12}(\frac{1.9}{2})^{2}}

\vec{E'} = 418.84 N/C

Now,

The net Electric field is given by:

\vec{E_{net}} = \vec{E} - \vec{E'}

\vec{E_{net}} = 708.03 - 418.84 = 289.19 N/C

5 0
3 years ago
A woman and her dog are out for a morning run to the river, which is located 4.0 KM away. The woman runs at 2.5 M/S in a straigh
VLD [36.1K]

River shore is located at distance

d = 4 km

speed of the woman is given as

v_1 = 2.5 m/s

now the time taken by the woman to cover the distance is

t = \frac{d}{v}

t = \frac{4000}{2.5} = 1600 s

for the same time interval the dog will run to and fro with speed 4.5 m/s

so the total distance moved by the dog is given by

d = v* t

d = 4.5 * 1600

d = 7200 m

<em>so the total distance that dog will move is 7200 m or 7.2 km</em>

8 0
3 years ago
Other questions:
  • A student is conducting a physics experiment and rolls four different-
    7·1 answer
  • A rocket sled for testing equipment under large accelerations starts at rest and accelerates according to the expression a = (3.
    5·1 answer
  • What sort of element can be found in Group 13 of the periodic table?
    14·1 answer
  • Technician A says that low compression on a single cylinder will cause an engine not to start. Technician B says that low compre
    14·1 answer
  • 2. If you exert a force of 10.0 N to lift a box a distance of 0.9 m, how much work have you done?
    11·2 answers
  • A billiard ball collides with a second identical ball in an elastic head-on collision. What is the kinetic energy of the system
    13·2 answers
  • If an object stay still or could 10 years moving and the same speed in the same direction it is a __ force
    13·2 answers
  • 1. A 6-volt battery produces a current of 0.5 amps. What is the power in the circuit?
    8·1 answer
  • Which of the following is the correct definition of electric magnetic field
    12·1 answer
  • A practical machine cannot be 100% efficient? <br>please give me the answer.​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!