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
faltersainse [42]
3 years ago
8

On a sunny day, a family decided to take sail on a nearby lake. During sailing the wind applies a force of 25N north on the sail

s of the sailboat. The
water however exerts a force of 20 N east. If the total mass of both the sailboat and the crew (family on board) is 20kg, what is the magnutude and
direction of the acceleration produced?
​
Physics
1 answer:
natka813 [3]3 years ago
4 0

Answer:

its n

Explanation:

You might be interested in
A longitudinal wave is a combination of a transverse wave and a surface wave.(true or false)
Lisa [10]

Answer: True

Explanation:

8 0
4 years ago
What are some facts about visual memory
mr_godi [17]
<span> Learning new things produces physical changes in your brain structure</span>
5 0
3 years ago
Read 2 more answers
Describe how to make a position-time graph.
salantis [7]

Answer:

There's a video called Drawing Position vs Time Graphs made by MrDGenova that may help you, it's only three minutes long.

Explanation:

Hope that helps, if not, you could tell me what you don't understand and I could try explaining it in further detail.

3 0
3 years ago
A boxer can hit a heavy bag with great force. Why can't he hit a piece of tissue paper in midair with the same amount of force?
12345 [234]

Answer:

This is due to impulse

Explanation:

Impulse equal to mΔv and FΔt

You can set these equal as mΔv = FΔt

When a boxer punches a tissue, it is like punching a cushion or a pillow. The time that the hit takes is much grater than if they were to hit something solid. In addition, the change in velocity of the boxer's arm would be much greater when they hit a punching bag. In this equation, the greater the time, the less force that is needed.

6 0
3 years ago
xConsider the following reduction potentials: Cu2+ + 2e– Cu E° = 0.339 V Pb2+ + 2e– Pb E° = –0.130 V For a galvanic cell employi
slega [8]

Answer:

Approximately \rm 90\; kJ.

Explanation:

Cathode is where reduction takes place and anode is where oxidation takes place. The potential of a electrochemical reaction (E^{\circ}(\text{cell})) is equal to

E^{\circ}(\text{cell}) = E^{\circ}(\text{cathode}) - E^{\circ}(\text{anode}).

There are two half-reactions in this question. \rm Cu^{2+} + 2\,e^{-} \rightleftharpoons Cu and \rm Pb^{2+} + 2\,e^{-} \rightleftharpoons Pb. Either could be the cathode (while the other acts as the anode.) However, for the reaction to be spontaneous, the value of E^{\circ}(\text{cell}) should be positive.

In this case, E^{\circ}(\text{cell}) is positive only if \rm Cu^{2+} + 2\,e^{-} \rightleftharpoons Cu is the reaction takes place at the cathode. The net reaction would be

\rm Cu^{2+} + Pb \to Cu + Pb^{2+}.

Its cell potential would be equal to 0.339 - (-0.130) = \rm 0.469\; V.

The maximum amount of electrical energy possible (under standard conditions) is equal to the free energy of this reaction:

\Delta G^{\circ} = n \cdot F \cdot E^{\circ} (\text{cell}),

where

  • n is the number moles of electrons transferred for each mole of the reaction. In this case the value of n is 2 as in the half-reactions.
  • F is Faraday's Constant (approximately 96485.33212\; \rm C \cdot mol^{-1}.)

\begin{aligned}\Delta G^{\circ} &= n \cdot F \cdot E^{\circ} (\text{cell})\cr &= 2\times 96485.33212 \times (0.339 - (-0.130)) \cr &\approx 9.0 \times 10^{4} \; \rm J \cr &= 90\; \rm kJ\end{aligned}.

5 0
3 years ago
Other questions:
  • (a) Calculate the wavelength of light in vacuum that has a frequency of 5.25 x 1018 Hz. nm (b) What is its wavelength in diamond
    12·1 answer
  • A plane progressive wave is represented by the equation y =2sin (2000πt- 0.5x) the symbols have their usual meanings. what is th
    9·1 answer
  • Which motion maps show an object in uniform circular motion? Check all that apply. V W X Y
    9·2 answers
  • A single point on a distance time graph tells the ____ speed
    10·2 answers
  • How would the Earth move if the sun (including its gravity) suddenly disappeared? Explain your answer.
    5·1 answer
  • Do you guys know how to find out the Wave Speed using frequency and wavelength?
    10·1 answer
  • Please please help i need to finish this test
    8·1 answer
  • A pendulum consists of a 2.0-kg block hanging on a 1.5-m length string. A 10-g bullet moving with a horizontal velocity of 900 m
    15·1 answer
  • A small source of sound waves emits uniformly in all directions. The total power output of the source is P. By what factor must
    5·1 answer
  • What is meant by a quantity ? Mention any three system of unit that you know to measure a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!