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Misha Larkins [42]
3 years ago
10

In a first order decomposition in which the rate constant is 0.204 sec-1, how long will it take (in seconds) until 0.399 mol/L o

f the compound is left, if there was 0.991 mol/L at the start? (give answer to 3 decimal places)?
Physics
1 answer:
DENIUS [597]3 years ago
5 0

Answer:

2.902 to 3 decimal places

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"
Volgvan

Answer:

The height is : 60.025 m

Explanation:

The flowerpot falls off the balcony with zero launch angle

Given the time of fright as 3.5 s then ;

The formula to apply is ;

T=\sqrt{\frac{2H}{g} }\\\\3.5=\sqrt{\frac{2H}{9.8} }

3.5²= 2H/9.8

12.25 =2H/9.8

12.25 * 9.8 = 2H

120.05 = 2H

120.05/2 = H

60.025 =H

7 0
3 years ago
A seesaw made of a plank of mass 10.0 kg and length 3.00 m is balanced on a fulcrum 1.00 m from one end of the plank. A 20.0-kg
lidiya [134]

Answer:

7.5 kg

Explanation:

We are given that

m_1=10 kg

Length of plank, l=3 m

Distance of fulcrum from one end of the plank=1 m

m_2=20 kg

We have to find the mass must be on the other end if the plank remains balanced.

Let m be the mass must be on the other end if the plank remains balanced.

In balance condition

20\times 1=10\times (1.5-1)+m\times (1.5+0.5)

20=10(0.5)+2m

20=5+2m

2m=20-5=15

\implies m=\frac{15}{2}

m=7.5 kg

Hence, mass 7.5 kg   must be on the other end if the plank remains balanced.

3 0
3 years ago
Read 2 more answers
A spacecraft is on a journey to the moon. At what point, as measured from the center of the earth, does the gravitational force
Alexeev081 [22]

Answer:

This distance is measured from the center of the earth   r = 3.4 10⁸ m

Explanation:

The equation for gravitational attraction force is

      F = G m1 m2 / r²

Where g is the universal gravitation constant, m are the masses of the body and r is the distance between them, remember that this force is always attractive

Let's write the sum of force on the ship and place the condition that is balanced

    F1 -F2 = 0

    F1 = F2

Let's write this equation for our case

   G m Me / r² = G m Mm / (r'.)²

   

The distance r is measured from the center of the earth and the distance r' is measured from the center of the moon,

   

      r' = 3.85 10⁸ m

Let's simplify and calculate the distance

     Me / r² = Mm / / (3.85 108- r)²

     Me / Mm (3.85 108- r)² = r²

     √ 81.4 (3.85 108 -r) = r

     √ 81.4  3.85 108 = r (1 + √ 81.4)

     34.74 108 = r (10.02)

     r = 34.74 10⁸ / 10.2

     r = 3.4 10⁸ m

This distance is measured from the center of the earth

6 0
4 years ago
As you walk away from a plane mirror on a wall yiur image is always a real image no matter how far you are from the mirror?
Alexus [3.1K]

Answer:

Correct option is D.

Explanation:

The size may change due to the distance from the mirror

I am 100% Sure about this answer

3 0
3 years ago
Read 2 more answers
I will mark brainlist pls help and. Give right answers
Vera_Pavlovna [14]

I think its b. Answer:

Explanation:

7 0
3 years ago
Read 2 more answers
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