Question

1. A centrifuge in a medical laboratory rotates at a rotational speed of 3600 rev/min. When turned off, it rotates 20.0 times at a constant angular acceleration before coming to rest. The angle through which the centrifuge rotates before coming to rest is

A. 3.18 rad

B. 20.0 rad

C. 80.0 rad

D. 126 rad

E. None of the above.

2. A very light particle traveling 23 m/s elastically collides (in one dimension) with a massive target that was initially at rest. After the collision, what is the velocity of the projectile?

A. is -23 m/s

B. is 0 m/s

C. is -46 m/s

D. cannot be determined (masses not known)

E. None of the above.

Answer #1

A centrifuge in a medical laboratory rotates at a rotational
speed of 2600 rev/min. When turned off, it rotates 25.0 times at a
constant angular acceleration before coming to rest. The angle
through which the centrifuge rotates before coming to rest is A.
3.18 rad B. 20.0 rad C. 80.0 rad D. 126 rad E. None of the
above

1) A centrifuge in a medical laboratory rotates at an angular
speed of 3,650 rev/min. When switched off, it rotates through 54.0
revolutions before coming to rest. Find the constant angular
acceleration (in rad/s2) of the
centrifuge.
1
rad/s2
2) The diameters of the main
rotor and tail rotor of a single-engine helicopter are 7.59 m and
0.98 m, respectively. The respective rotational speeds are 451
rev/min and 4,132 rev/min. Calculate the speeds of the tips of both
rotors.
main rotor ...

A centrifuge in a medical laboratory rotates at an angular speed
of 3700 rev/min. When switched off, it rotates through 52.0
revolutions before coming to rest. Find the constant angular
acceleration of the centrifuge.
_____rad/s2

---- A centrifuge is a common laboratory instrument that
separates components of differing densities in solution. This is
accomplished by spinning a sample around in a circle with a large
angular speed. Suppose that after a centrifuge in a medical
laboratory is turned off, it continues to rotate with a constant
angular deceleration for 10.7 s before coming to rest.
A) If its initial angular speed was 3830 rpm , what is the
magnitude of its angular deceleration?
B) How...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 28 minutes ago

asked 40 minutes ago

asked 51 minutes ago

asked 51 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago