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2 years ago

A stone is thrown straight upward and reaches a maximum height of 31.8 m above its

Physics

1 answer:

atroni [7]2 years ago

7 0

Answer:

aral ka muna ng mabuti para maintindihan mo

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Only 5 questions plz answer.

Masja [62]

Question 18: a
question 19: b
question 20: c

6 0

2 years ago

Read 2 more answers

What is angle between the vectors 2i -3j +K

Gnom [1K]

Answer:

the answer is B

Explanation:

edg 2020

3 0

2 years ago

A car travels a distance of 200m in 20s. The engine of the car provides a driving force of 1000N. What is the power output of th

sp2606 [1]

Answer:

10000W

Explanation:

work=1000*200=200000

then

P=work/time=200000/20=10000W

6 0

3 years ago

When two point charges are a distance d apart, the magnitude of the electrostatic force between them is F. If the distance betwe

EastWind [94]

Answer:

The magnitude of the electrostatic force decreases by a factor 9

Explanation:

The electrostatic force between two charges is given by:

$F=k\frac{q_1 q_2}{d^2}$

where

k is the Coulomb's constant

q1 and q2 are the two charges

d is the distance between the two charges

We see that the magnitude of the force is inversely proportional to the square of the distance. If the distance is increased to 3d: d' = 3d, the new electrostatic force would be:

$F'=k\frac{q_1 q_2}{(d')^2}=k\frac{q_1 q_2}{(3d)^2}=\frac{1}{9} k\frac{q_1 q_2}{d^2}=\frac{F}{9}$

So, the electrostatic force decreases by a factor 9.

3 0

3 years ago

Read 2 more answers

A person uses eyeglasses with a power of -5.5 D. The lenses are 1.8 cm from the person's eye. What is the furthest this person c

bija089 [108]

Answer:

The correct answer is option B.

Explanation:

$power(P)=\frac{1}{f}$

f = focal length

P = -5.5 D (negative power means that lens is concave)

$f=\frac{1}{P}=\frac{1}{-5.5 D}= -0.1818 m$

1 m = 100 cm

f = -0.1818 m = -0.1818 × 100 cm= -18.18 cm

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}$

$u=\infty$

$\frac{1}{-18.18 cm}=\frac{1}{\infty }+\frac{1}{v}$

v = -18.18 cm

v = 1.8 cm - far point

far point = 1.8 cm - v =1.8 cm - (-18.18 cm) = 19.98 cm

But closest answer from the given options is option B.Hence, 20 cm is the correct answer.

6 0

2 years ago