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Dafna1 [17]
3 years ago
7

2. A boy kicks the football of mass 500 g which is initially at rest. It starts moving with a

Physics
2 answers:
Zarrin [17]3 years ago
8 0

Answer:

mass 500g is converted into kg

500/1000=0.5kg

same 1/2=0.5

Explanation:

nikdorinn [45]3 years ago
4 0

Answer:

Below given

Explanation:

constant velocity of 5 m/s. Calculate:

(a) the kinetic energy of the boy

(b) the work done by the boy

[Ans.(a) 6.25 ), (b) 6.25]] can some on show me how the answer

came

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The focal length for a spherical convex mirror is –20 cm. What is its radius of curvature?
Svetradugi [14.3K]

Answer:

40 cm

Explanation:

The focus of a spherical convex mirror is the point at which the rays of an object converge in the infinite, it is also the point at which an object must be placed so that its image is formed in the infinite. The distance from the focus to the origin is called the focal length and is called f. It is related to the radius of the mirror, R, according to:

f=-\frac{R}{2}

rewriting for R:

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4 0
3 years ago
The average force of a baseball is 18.9 N . It’s mass is 0.145kg fine the acceleration in m/s^2
Artyom0805 [142]

Answer:

the acceleration is 130.3m/s²

Explanation:

Given data

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Applying the Newton's second law of motion

"The rate of change of momentum of a body is proportional to the external force".

F=ma

a= F/m

a= 18.9/0.142

a= 130.3m/s²

3 0
3 years ago
Students in a chemistry class added 5g of zinc (Zn) to 50g of hydrochloric acid (HCl). A chemical reaction occurred that produce
PilotLPTM [1.2K]

Answer:

10. 36 g ZnCl2

Explanation:

Zn + 2HCl  -> ZnCl2 + H2

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1.37 mol HCl

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Limiting reactant: Zn

1 mol Zn        -> 1 mol ZnCl2

0.076 mol Zn  ->x                         x= 0.076 mol ZnCl2=10.36 g

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egoroff_w [7]
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Answer:

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5 0
3 years ago
Read 2 more answers
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