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lord [1]
2 years ago
6

Hey! anybody knows the answer then help me i will mark your answer!!!

Physics
1 answer:
Volgvan2 years ago
8 0

10/9

Explanation:

option 2 is the correct answer

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What mineral is most abundant in granite
77julia77 [94]
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3 0
3 years ago
The tension in a string from which a 4.0 kg object is suspended in an elevator is equal to 44 N. What is the acceleration of the
Ronch [10]

Answer: 1

Explanation:

Given

Tension is the string T=44\ N

mass of object m=4\ kg

Tension is greater than the weight of the object i.e. elevator is moving upward

we can write

\Rightarrow T-mg=ma\\\Rightarrow T=m(g+a)\\\Rightarrow 44=4(10+a)\\\Rightarrow 11=10+a\\\Rightarrow a=1\ m/s^2

8 0
2 years ago
A car traveling at a speed of 30 m/s encounters an emergency and comes to a complete
Natasha2012 [34]

Answer:

Explanation:

Use the one-dimensional equation

v_f=v_0+at which says that the final velocity of an object is equal to the object's initial velocity plus its acceleration times time. We are looking for time. That means the equation looks like this:

0 = 30 + (-4)t and

-30 = -4t so

t = 7.5 sec

4 0
3 years ago
An object is placed at a distance of 60 cm from a concave lens of focal length 30cm.find the position and nature of the image?
ladessa [460]

Answer:

using the lens formula: 1/f = 1/u + 1/v

focal length f = -30 (negative because it is concave lens)

object distance u = 60

image distance v= unknown

1/-30 = 1/60 + 1/v

v = -20

So, the image is 20cm from lens (on the same side along with the object), and it is virtual (because of negative sign) and erect (concave lens must produce erect images).

5 0
3 years ago
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