What Happens when a warm fluid cools down

Why would physical science be used to study light emitted by a star?

Usimov [2.4K]

Answer:

B the positions of stars control our lives

Explanation:

6 0

3 years ago

A force is applied to the rim of a disk that can rotate like a merry-go-round, so as to change its angular velocity. Its initial

yawa3891 [41]

Answer:

A = B = C > D

Explanation:

Work done to stop the disc is given as

$W = \Delta K$

$W = \frac{1}{2}I(\omega_f^2 - \omega_i^2)$

so we have

(a) –2 rad/s, 5 rad/s;

(b) 2 rad/s, 5 rad/s;

(c) –2 rad/s, –5 rad/s; and

(d) 2 rad/s, –5 rad/s.

So we have

$W_a = W_b = W_c = \frac{1}{2}I(5^2 - 2^2)$

$W_d = \frac{1}{2}I(2^2 - 5^2)$

so we have

A = B = C > D

5 0

3 years ago

For the first 10 seconds a squirrel runs 3 m/s to look for an acorn. The next 5 seconds he eats an acorn that he finds. Afterwar

Gala2k [10]

Distance covered by the squirrel to look for an acorn :

d = ( 3 m/s ) × 10 s = 30 m.

Time taken to eat an Acron is 5 seconds.

Time taken to cover distance of 30 m with 2 m/s speed is :

$T=\dfrac{30}{2}\ s= 15 \ s$

Therefore, total time take to get back to where he started is ( 10+5+15 ) = 30 s.

Hence, this is the required solution.

7 0

3 years ago

A rescue airplane is diving at an angle of 37º below the horizontal with a speed of 250 m/s. It releases a survival package when

alisha [4.7K]

Answer:

<em>The correct option is 1. 720 m</em>

Explanation:

<u>Projectile Motion</u>

When an object is launched in free air (no friction) with an initial speed vo at an angle $\theta$ , it describes a curve which has two components: one in the horizontal direction and the other in the vertical direction. The data provided gives us the initial conditions of the survival package's launch.