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
Anastasy [175]
2 years ago
12

A boat having a length 3m and breadth 2m is floating on a

Physics
1 answer:
brilliants [131]2 years ago
3 0

Answer:

60 kg

Explanation:

The man's weight is equal to the weight of the water he displaces.

mg = ρVg

m = ρV

m = (1000 kg/m³) (3 m × 2 m × 0.01 m)

m = 60 kg

The man's mass is 60 kg.

You might be interested in
An electrical motor spins at a constant 1975.0 rpm. If the armature radius is 7.112 cm, what is the acceleration of the edge of
stealth61 [152]

Answer:

Option D is the correct answer.

Explanation:

Since value of angular acceleration is constant, the body has only centripetal acceleration.

Centripetal acceleration

               a=\frac{v^2}{r}=\frac{(r\omega )^2}{r}=r\omega ^2

We have radius = 7.112 cm = 0.07112 m

Frequency, f = 1975 rpm = 32.92 rps

Angular frequency, ω = 2πf = 2 x π x 32.92 = 206.82 rad/s

Substituting in centripetal acceleration equation,

              a=r\omega ^2=0.07112\times 206.82^2=3042.17m/s^2

Option D is the correct answer.                

3 0
3 years ago
an elevator mass of 7700 kg falls from a height of 32 m after a sudden failure in the hoisting cable. The mass is stopped by a s
valkas [14]

Answer:k=28.29 kN/m

Explanation:

Given

mass m =7700 kg

height from which Elevator falls h=32 m

Let x be the compression in the spring

thus From conservation of Energy Potential energy will convert in to Elastic Potential Energy of spring

\frac{kx^2}{2}=mg(h+x)----------1

also maximum acceleration is 5g

thus

mg-kx=ma

here a=-5g

kx=mg-m(-5g)=6mg

x=\frac{6mg}{k}

Substitute x in equation 1

0.5\times k\times (\frac{6mg}{k})^2=mg(h+\frac{6mg}{k})

18\frac{(mg)^2}{k}=mgh+6\frac{(mg)^2}{k}

k=12\cdot \frac{mg}{h}

k=12\times \frac{7700\times 9.8}{32}

k=28.29 kN/m

4 0
3 years ago
Work done depends on
natima [27]

Answer:

C. Both force and displacement

Explanation:

Hope this helps

3 0
2 years ago
For each of the following, draw the resulting wave when the two pulses occupy the same space. Unless otherwise noted, each wave
frozen [14]

Answer:

A

Explanation:

because it is are of circle

4 0
3 years ago
An object with a mass of 10.5kg is traveling at a velocity of 9m/s. What is the kinetic energy of
WARRIOR [948]
KE = 1/2mv^2
1/2(10.5)(9)^2
1/2(10.5)(81) = 425.25 J
7 0
2 years ago
Other questions:
  • If a transverse wave of energy travels through the water in this pond ,how wil the floating leaf be moved
    6·2 answers
  • An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its pla
    7·1 answer
  • Which combination of temperature and pressure correctly describes standard temperature and pressure
    7·1 answer
  • Which hormone regulates the amount of glucose in the blood ?
    9·2 answers
  • A scientist is studying the light emitted by several celestial objects. He records the shifts in each object’s spectral lines (i
    8·1 answer
  • What movements of water has the greatest effect on the growth of producers
    8·1 answer
  • Please help need answer asp
    6·1 answer
  • Which of the following describes the work done by a heat engine?
    15·1 answer
  • Three polarizing filters are shown in the figure below. The alignment of each filterâs transmission axis is shown, as measured f
    14·1 answer
  • .・✫・゜・。.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!