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
STALIN [3.7K]
3 years ago
9

How fast, in rpm, would a 5.6 kg, 25-cm-diameter bowling ball have to spin to have an angular momentum of 0.26 kgm2/s

Physics
1 answer:
solong [7]3 years ago
5 0

Answer:

71 rpm

Explanation:

Given that:

Angular momentum (L) = 0.26

Diameter = 25cm = 0.25 cm

Radius, r = (d/2) = 0.125m

Mass = 5.6 kg

Moment of inertia (I) = 2mr² / 5

I = (2 * 5.6 * 0.125^2) / 5

= 0.175

= 0.175 / 5

= 0.035 kgm²

Angular speed (w) ;

w = L / I

w = 0.26 / 0.035

= 7.4285714

= 7.429 rad/s

w = (7.429 * 60/2π)

w = 445.74 / 2π rpm

w = 70.941724

Angular speed = 70.94 rpm

= 71 rpm

You might be interested in
Mt. Asama, Japan, is an active volcano. In 2009, an eruption threw solid volcanic rocks that landed 1 km horizontally from the c
Nata [24]

Answer:

a) 69.3 m/s

b) 18.84 s

Explanation:

Let the initial velocity = u

The vertical and horizontal components of the velocity is given by uᵧ and uₓ respectively

uᵧ = u sin 40° = 0.6428 u

uₓ = u cos 40° = 0.766 u

We're given that the horizontal distance travelled by the projectile rock (Range) = 1 km = 1000 m

The range of a projectile motion is given as

R = uₓt

where t = total time of flight

1000 = 0.766 ut

ut = 1305.5

The vertical distance travelled by the projectile rocks,

y = uᵧ t - (1/2)gt²

y = - 900 m (900 m below the crater's level)

-900 = 0.6428 ut - 4.9t²

Recall, ut = 1305.5

-900 = 0.6428(1305.5) - 4.9 t²

4.9t² = 839.1754 + 900

4.9t² = 1739.1754

t = 18.84 s

Recall again, ut = 1305.5

u = 1305.5/18.84 = 69.3 m/s

7 0
3 years ago
आप शोर मत करिए। किस प्रकार का वाक्य है- *​
Law Incorporation [45]

Answer:

477547748jkdsjdjk

Explanation:

7 0
3 years ago
A​ right-circular cylindrical tank of height 8 ft and radius 4 ft is laying horizontally and is full of fuel weighing 52 ​lb/ft3
tresset_1 [31]

Given:

Height of tank = 8 ft

and we need to pump fuel weighing 52 lb/ ft^{3} to a height of 13 ft above the tank top

Solution:

Total height = 8+13 =21 ft

pumping dist = 21 - y

Area of cross-section = \pi r^{2} =  \pi 4^{2} =16\pi ft^{2}

Now,

Work done required = \int_{0}^{8} 52\times 16\pi (21 - y)dy

                                  = 832\pi \int_{0}^{8} (21 - y)dy

                                  = 832\pi([ 21y ]_{0}^{8} - [\frac{y^{2}}{2}]_{0}^{8}\\)

                                  = 113152\pi = 355477 ft-lb

Therefore work required to pump the fuel is 355477 ft-lb

7 0
3 years ago
If the load on Pulley E is 20N, how much effort is needed to life it?
Mariana [72]
It would need to be over 20 because if the load of the Pulley E is 20 and the effort is 20, then they will be equal and the Pulley would not move, so your answer is at least 20
7 0
3 years ago
En un juego de béisbol, un lanzador logra
den301095 [7]

Answer:

B transferred.

Explanation:

The kinetic energy is simply transferred by transforming it into other forms of energy.

According to the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".

  • The moving baseball posses kinetic energy
  • As it hits the bat, it is converted to mechanical and thermal energy.
  • The bat warms up due to the transfer of the kinetic energy.
  • The mechanical energy of the bat cause work to be done on it and it breaks apart.
  • This ensures that the energy in this process is conserved.
7 0
3 years ago
Other questions:
  • A 9.38 microFarad capacitor is measured to have a reactance of 260.0 Ohm. At what frequency (in Hz) is it being driven?
    14·1 answer
  • In a simple machine, the energy input is 120 J. If the efficiency of the machine is 80%, calculate the energy output
    12·1 answer
  • What happens to the air resistance on a car as it speeds up? A) decreases b)stays the same C)it changes direction of the car D)i
    7·1 answer
  • How many new facilities does an average facility manager build during his or her career?
    9·1 answer
  • How many protons does Aluminum have?
    15·1 answer
  • Which of the following could be used to create an open circuit?
    11·1 answer
  • Which of the following objects is NOT accelerating?
    10·1 answer
  • Compare the current in the 8-ohm resistors to the current in the 4-ohm resistors.
    9·1 answer
  • The majority of which type of dancing was created in African American communities?
    10·2 answers
  • I drove from Oklahoma to California (1452.9 miles) in 23 hours? What was my average speed?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!