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
pochemuha
3 years ago
7

How am I supposed to solve this?

Physics
2 answers:
RSB [31]3 years ago
7 0

Answer:

4.02 km/hr

Explanation:

5 km/hr = 1.39 m/s

The swimmer's speed relative to the ground must have the same direction as line AC.

The vertical component of the velocity is:

uᵧ = us cos 45

uᵧ = √2/2 us

The horizontal component of the velocity is:

uₓ = 1.39 − us sin 45

uₓ = 1.39 − √2/2 us

Writing a proportion:

uₓ / uᵧ = 121 / 159

(1.39 − √2/2 us) / (√2/2 us) = 121 / 159

Cross multiply and solve:

159 (1.39 − √2/2 us) = 121 (√2/2 us)

220.8 − 79.5√2 us = 60.5√2 us

220.8 = 140√2 us

us = 1.115

The swimmer's speed is 1.115 m/s, or 4.02 km/hr.

Lerok [7]3 years ago
4 0
4.02 is the answer to your question
You might be interested in
When 2 grams of hydrogen (h2) react with 32 grams of oxygen (O2) the reaction yields hydrogen peroxide (h2o2) how many grams of
MissTica

as per the reaction we have

H_2 + O_2 ---> H_2O_2

so here 1 mole of H2 react with 1 mole of O2 and give 1 mole of H2O2 as the product

now we will find the moles of given reactant

moles of H2

n_1 = \frac{2}{2} = 1 mole

moles of O2

n_2 = \frac{32}{32} = 1 mole

so here both present in 1 mole each hence the product will also formed 1 mole

so here we have

n = 1 mole H2O2 will form

so mass of the product

mass = moles* molecular mass

m = 1 * (2 + 32)

m = 34 g

so the product mass will be 34 g

6 0
3 years ago
A package is dropped from a helicopter that is descending steadily at a speed v0. After t seconds have elapsed, consider the fol
qaws [65]

Answer:

Part a)

v = \sqrt{v_o^2 + g^2t^2}

Part b)

d = \frac{1}{2}gt^2

Part c)

v_f = v_o - gt

Part d)

d = \frac{1}{2}gt^2

Explanation:

Part a)

As we know that speed of package is same as that of helicopter in horizontal direction

So after time "t" the velocity in x direction will remain constant while in Y direction it will go free fall

So we have

v_y = -gt

v = \sqrt{v_x^2 + v_y^2}

v = \sqrt{v_o^2 + g^2t^2}

Part b)

Distance from helicopter is same as the distance of free fall

so we will have

d = \frac{1}{2}gt^2

Part c)

If helicopter is rising upwards with uniform speed

then final speed of the package after time t is given as

v_f = v_i + at

v_f = v_o - gt

Part d)

distance from helicopter

d = \frac{1}{2}gt^2

8 0
3 years ago
Read 2 more answers
What are hot clouds of gaseous elements and compounds that act as nurseries for stars
Aleks04 [339]
Interstellar gas clouds are common in many galaxy, like the Orion nebulae which many young stars are being born. A typical nebula is many light years in diameter and contains enough material mass to make several thousand stars the size of our sun. The majority of the gas in nebulae consist of molecules of hydrogen and helium-but most nebulae also contain atoms of other elements. All known element in our periodic table is also being made inside this crucible of this immense hot gas. The source of the organic molecules is still a mystery. Irregularities in the density of the gas causes a net gravitational force that pull the gas molecules close together.
3 0
3 years ago
A football is kicked at a velocity of 15m/s at an angle of 25 to the horizontal. Calculate: a) total flight time. b) the maximum
____ [38]
Total time of flight:2usin¢/g if we take g=10m/s²
T=1.2678s
maximum height:u²sin²¢/2g
H=2.009m
range:u²sin2¢/g
R=17.236m
5 0
2 years ago
Read 2 more answers
Which is an example of electrical energy being converted into light energy? A) the sun B) a light bulb C) a solar panel D) a glo
mihalych1998 [28]
The correct answer is B. A light bulb
8 0
3 years ago
Other questions:
  • A block of wood has a mass of 120 g and a volume of 200cm what is the density of the word
    11·1 answer
  • The nonmetals include which of the following groups? Use the periodic table to answer the question. Check all that apply. haloge
    11·1 answer
  • The Grand Canyon is 1800 meters deep at its deepest point. A rock is dropped from the rim above this point. Write the height of
    14·1 answer
  • You need to design a 60.0-Hz ac generator that has a maximum emf of 5500 V. The generator is to contain a 150-turn coil that has
    5·1 answer
  • When two or more atoms combine into a chemical compound, the force of attraction holding the atoms together is known as a ...
    5·1 answer
  • Which of the following substances could be heated from 20°C to 100°C most quickly? Assume identical heat sources are used on all
    13·2 answers
  • Pls help i have test
    13·2 answers
  • Why is a protective apron or lab coat important to use when working with acids?
    12·2 answers
  • What do you know about a laser to predict its performance as a surgical tool? Give at least four factors and explain the signifi
    13·1 answer
  • The game starts with the serve on the left side of the court.<br> O<br> True<br> O<br> False
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!