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notsponge [240]
3 years ago
12

This is the correct answer just took the test.

Physics
1 answer:
guajiro [1.7K]3 years ago
5 0
Are u asking if ur question is correct ?
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An unfortunate 18 kg monkey falls from a 40 m tall tree. What is the monkeys final velocity just befor he impacts the ground.? a
zalisa [80]
The correct answer is c) 28 m/s.
Let's find the step-by-step solution. The motion of the monkey is an uniformly accelerated motion, with acceleration equal to g=9.81 m/s^2. The initial velocity of the monkey is zero, while the distance covered is S=40 m. Therefore, we can use the following relationship to find vf, the final velocity of the monkey:
2aS=v_f^2-v_i^2=v_f^2
from which
v_f= \sqrt{2aS}= \sqrt{2\cdot 9.81 m/s^2 \cdot 40 m}=28 m/s
5 0
3 years ago
What is the weight in newtons of an object that has a mass of (a) 8 kg, (b) 0.04 kg, and (c) 760 mg?
Mars2501 [29]

The weight of object with a mass of 8 kg is 78.4 N.

The weight of object with a mass of 0.04 kg is 0.392 N.

The weight of object with a mass of 760 mg is 7.45 N.

<h3>What is weight?</h3>

The weight of an object is the force acting on the object due to gravity.

Weight, W = mg

where;

  • m is the mass of the object
  • g is acceleration due to gravity, 9.8 m/s²

<h3>Weight of object with a mass of 8 kg</h3>

W = mg

W = 8 kg x 9.8 m/s²

W = 78.4 N

<h3>Weight of object with a mass of 0.04 kg</h3>

W = mg

W = 0.04 kg x 9.8 m/s²

W = 0.392 N

<h3>Weight of object with a mass of 760 mg</h3>

W = mg

W = 0.76 kg x 9.8 m/s²

W = 7.45 N

Thus, the weight of object with a mass of 8 kg is 78.4 N.

The weight of object with a mass of 0.04 kg is 0.392 N.

The weight of object with a mass of 760 mg is 7.45 N.

Learn more about weight here: brainly.com/question/2337612

#SPJ1

8 0
2 years ago
HELP ME!!! I don't know if you can see the picture on the right or not..
gizmo_the_mogwai [7]
It’s an assortment of compound molecules
7 0
3 years ago
Read 2 more answers
Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Qu/s = 8.7
Musya8 [376]

Answer

given,

Q u  = 8.7 m³/s

Q d= 0.9 m³/s

BOD concentration = 50 mg/L

a) BOD concentration at the down stream

C_{down}=\dfrac{0.9\times 50}{8.7+0.9}

C_{down}=\dfrac{0.9\times 50}{9.6}

               = 4.69 mg/L

b) discharge = 9.6 m³/s

cross sectional area = 10 m²

velocity steam = \dfrac{8.7+0.9}{10}

                        = 0.96 m/s

time taken to move 50 km down stream =\dfrac{50 \times 1000}{0.96}

                                                                  = 52083.3 s

                                                                  = \dfrac{52083.3}{3600\times 24}

                                                                   = 0.6 days

now,

C_t=C_0e^{-kt}

C_t=4.6875\ e^{-0.2\times 0.6}

C_t = 4.16 mg/L

5 0
4 years ago
What is the ultimate source of energy for an ecosystem?
Romashka-Z-Leto [24]

Answer:

Obviously the answer is Sun...

4 0
3 years ago
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