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
Fudgin [204]
3 years ago
9

A 760 N man stands in the middle of a frozen pond of radius 6.0 m. He is unable to get to the other side because of a lack of fr

iction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore, at a speed of 6.0 m/s. How long does it take him to reach the south shore?
Physics
1 answer:
Bezzdna [24]3 years ago
4 0

Answer:

Explanation:

Given

weight of man W=760 N

mass of man m_1=\frac{760}{g}=76\ kg

radius of pond r=6\ m

mass of textbook m_2=1.2\ kg

speed of text book v_2=6\ m/s

Let speed at which man recoils is v_1

Initially momentum is zero as man is at rest

Conserving momentum

0=m_1v_1+m_2v_2

0=76\times v_1+1.2\times 6

v_1=-0.1\ m/s

i.e. 0.1 m/s towards south

time taken to reach other side in absence of friction is given by

t=\frac{distance}{speed}

t=\frac{6}{0.1}

t=60 s\approx 1\ minute        

You might be interested in
Which embedded molecule in the cell membrane moves large molecules into and out of the cell?
Nezavi [6.7K]


The correct  answer is A.

The cell membrane consists of a phospholipid bilayer with embedded proteins. Sometimes molecules are just too big to easily flow across the plasma membrane or dissolve in the water so that they can be filtered through the cell membrane. In these  cases , the cells must put out a little energy to help get molecules in and out of the cell.

The proteins embedded in the plasma membrane form channels through which other molecules can pass. Some proteins act as carriers, that is they are 'paid" in energy to let a molecule attach to itself and  then transport that molecule inside the cell. This is called active transport.



5 0
4 years ago
A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1600 kPa. The working flui
anzhelika [568]

Answer:

a) 6498.84 kW

b) 0.51

c) 0.379

Explanation:

See the attached picture below for the solution

7 0
3 years ago
What were the two different alleles for height in the pea plants that Mendel studied?
natta225 [31]
You might want to go to this website,       http://www.indiana.edu/~p1013447/dictionary/mendel.htm
Welcome, And i hope this helps :P
8 0
3 years ago
Two satellites are in circular orbits around the earth. the orbit for satellite a is at a height of 542 km above the earth's sur
Evgen [1.6K]
Let R be radius of Earth with the amount of 6378 km h = height of satellite above Earth m = mass of satellite v = tangential velocity of satellite 
Since gravitational force varies contrariwise with the square of the distance of separation, the value of g at altitude h will be 9.8*{[R/(R+h)]^2} = g' 
So now gravity acceleration is g' and gravity is balanced by centripetal force mv^2/(R+h): 
m*v^2/(R+h) = m*g' v = sqrt[g'*(R + h)] 
Satellite A: h = 542 km so R+h = 6738 km = 6.920 e6 m g' = 9.8*(6378/6920)^2 = 8.32 m/sec^2 so v = sqrt(8.32*6.920e6) = 7587.79 m/s = 7.59 km/sec 
Satellite B: h = 838 km so R+h = 7216 km = 7.216 e6 m g' = 9.8*(6378/7216)^2 = 8.66 m/sec^2 so v = sqrt(8.32*7.216e6) = 7748.36 m/s = 7.79 km/sec
6 0
3 years ago
The yellow star has much less mass the blue star and so who will live longer
In-s [12.5K]

The yellow star will live longer as it has less mass

8 0
4 years ago
Other questions:
  • A raft is made of 12 logs lashed together. Each is 45 cm in diameter and has a length of 6.5 m. How many people can the raft hol
    14·1 answer
  • How is steam foremed
    11·2 answers
  • Which simple machine is the lid of a jar? a lever a screw an inclined plane a wheel and axle
    8·2 answers
  • An oral solution has a dosage of 500 mg in 5 mL. If a 0.7 g dosage is required, how many mL must be given?
    8·1 answer
  • Help me please
    9·1 answer
  • A 13.3 kg box sliding across the ground
    8·1 answer
  • The total resistance of a series circuit is 15.0 ohms what is the second resistance of the first resistance is 10.0 ohms?
    10·1 answer
  • A machine raised a load of 360N through a distance of 0.2m. The effort, a force of 50N moved 1.8m during the process. Calculate
    7·1 answer
  • Define relative velocity with an example. A man is going
    15·1 answer
  • I need HELP ASAP please!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!