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4 years ago

Which organism contains organ systems?

Physics

1 answer:

elena55 [62]4 years ago

3 0

Pig because it is made up of many organs system like cardiovascular and muscular system

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How long can a tow rope or chain be?<br> 1. 20 feet 2. 15 feet<br> 3. 5 feet<br> 4. 10 feet

Serga [27]

Answer:

"For towing, a tow chain should be of a length that keeps both vehicles within the maximum 4.5 meter distance, also tow chains an be any length 20 foot chains are often chosen"

Explanation:

- https://letstowthat.com

Also Quick note the feet of tow rope or chain varies on the situation but most longest or 20 feet.

3 0

3 years ago

A 1400 kg car moving +13.7 m/s makes an elastic collision with a 3200 kg truck, initially at rest. What is the velocity of the c

marishachu [46]

Answer:

-13.7m/s

Explanation:

If the car has a mass of 1400kg with a speed of +13.7m/s -> hits [email protected] rest and bounces with an elastic collision:

fm = -fm

Therefore, the speed the car will possess will be at a negative state.

= -13.7m/s

6 0

3 years ago

two forces are acting on a boat. one force of 400N is due to current in the river, acting downstream. the other force due to the

Artyom0805 [142]

Explanation:

we just resolve the first vector and add them

7 0

3 years ago

Use Stefan's law to find the intensity of the cosmic background radiation emitted by the fireball of the Big Bang at a temperatu

Rus_ich [418]

Complete Question

Use Stefan's law to find the intensity of the cosmic background radiation emitted by the fireball of the Big Bang at a temperature of 2.81 K. Remember that Stefan's Law gives the Power (Watts) and Intensity is Power per unit Area (W/m2).

Answer:

The intensity is $I = 3.535 *10^{-6} \ W/m^2$

Explanation:

From the question we are told that

The temperature is $T = 2.81 \ K$

Now According to Stefan's law

$Power(P) = \sigma * A * T^4$

Where $\sigma$ is the Stefan Boltzmann constant with value $\sigma = 5.67*10^{-8} m^2 \cdot kg \cdot s^{-2} K^{-1}$

Now the intensity of the cosmic background radiation emitted according to the unit from the question is mathematically evaluated as

$I = \frac{P}{A}$

=> $I = \frac{\sigma * A * T^4}{A}$

=> $I = \sigma * T^4$

substituting values

$I = 5.67 *10^{-8} * (2.81)^4$

$I = 3.535 *10^{-6} \ W/m^2$

4 0

3 years ago

A hunter stands on a frozen pond (frictionless) and fires a 4.20g bullet at 965m/s horizontally.The mass of hunter + gun is 72.5

Afina-wow [57]

Answer:

The the recoil velocity of the hunter is 0.056 m/s in opposite direction of the bullet.

Explanation:

Given;

mass of bullet, m₁ = 4.2 g = 0.0042 kg

mass of hunter + gun = 72.5 kg

velocity of the bullet, u = 965 m/s

Momentum of the bullet when it was fired;

P = mv

P = 0.0042 x 965

P = 4.053 kg.m/s

Determine the recoil velocity of the hunter.

Total momentum = sum of the individual momenta

Total momentum = momentum of the bullet + momentum of the hunter

Apply the principle of conservation of momentum, sum of the momentum is equal to zero.

$P_{hunter} + P_{bullet} = 0\\\\P_{hunter} = -P_{bullet}\\\\72.5v = -4.053\\\\v = \frac{-4.053}{72.5} \\\\v = - 0.056 \ m/s\\\\Thus, the \ recoil \ velocity \ of \ the \ hunter \ is \ 0.056 \ m/s, \ in \ opposite \ direction \ of \ the \ bullet.$

Therefore, the the recoil velocity of the hunter is 0.056 m/s in opposite direction of the bullet.

6 0

4 years ago