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1 year ago

Use the idea of density to explain why the dead creatures sink to the seabed

Physics

2 answers:

Lelu [443]1 year ago

5 0

Answer:

Because they are denser.

Explanation:

Remember: the denser something depends on both its mass and volume. A higher mass will make a denser object. Likewise can be said for volume.

Jet001 [13]1 year ago

3 0

Vauahaiabsiavaivsishsi

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Determine the centripetal force upon a 40-kg child who makes 10 revolution around the cliffhanger in 29.3 seconds.the radius of

zysi [14]

Answer:

The centripetal force acting on the child is 39400.56 N.

Explanation:

Given:

Mass of the child is, $m=40\ kg$

Radius of the barrel is, $R=2.90\ m$

Number of revolutions are, $n =10$

Time taken for 10 revolutions is, $t=29.3\ s$

Therefore, the time period of the child is given as:

$T=\frac{n}{t}=\frac{10}{29.3}=0.341\ s$

Now, angular velocity is related to time period as:

$\omega=\frac{2\pi}{T}=\frac{2\pi}{0.341}=18.43\ rad/s$

Now, centripetal force acting on the child is given as:

$F_{c}=m\omega^2 R\\F_{c}=40\times (18.43)^2\times 2.90\\F_{c}=40\times 339.66\times 2.90\\F_{c}=39400.56\ N$

Therefore, the centripetal force acting on the child is 39400.56 N.

8 0

2 years ago

Two objects interact with each other and with no other objects. Initially object A has a speed of 5 m/s and object B has a speed

Radda [10]

Answer:

We can conclude that there is a decrease in kinetic energy of the particles due to their elastic collision, since kinetic energy is directly proportional to squared velocity of the particles.

Explanation:

Given:

initial velocity of particle A, Ua = 5m/s

initial velocity of particle B, Ub = 10 m/s

final velocity of particle A, Va = 4m/s

final velocity of particle B, Vb = 7m/s

For particle A:

The final velocity is 1 less than the initial velocity.

For particle B:

The final velocity is 3 less than the initial velocity.

We can conclude that there is a loss in kinetic energy due to elastic collision of the two particles, since kinetic energy is directly proportional to squared velocity of the particles. A decrease in velocity means decrease in kinetic energy.

4 0

2 years ago

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron n

qaws [65]

Felectric = q*E
 Ftranslational = m*a
 Felectric = Ftranslational
 q*E = m*a
 Solve for a
 a = q/m*E 
 Our sign convention is "up is positive"
 q = 1.6*10^-19 C
 m = 1.67*10^-27 kg
 E = -150 N/C (- because it is down and up is positive)
 a = -6,4*10^5 m/s^2 (downward)
 answer
a = -6,4*10^5 m/s^2 (downward)

3 0

2 years ago

Consider three drinking glasses. All three have the same area base, and all three are filled to the same depth with water. Glass

Kay [80]

The glass which has the greatest liquid pressure at the bottom is all 3 have equal non-zero pressure at the bottom. The correct answer between all the choices given is the first choice or letter A. I am hoping that this answer has satisfied your query about and it will be able to help you.

4 0

2 years ago

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Let A be the last two digits and let B be the sum of the last three digits of your 8-digit student ID. (Example: For 20245347, A

zheka24 [161]

Answer:

The speed is 173 m/s.

Explanation:

Given that,

A = 47

B = 14

Length 1 urk = 58.0 m