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Radda [10]
3 years ago
13

when an object is placed near a concave mirror, at what position does it forms a magnified and erect image.​

Physics
1 answer:
alexira [117]3 years ago
4 0

Answer:

Between the principal focus and the pole of the mirror

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If we decrease the amount of force applied to an object, and all other factors remain the same, the amount of work completed wil
Nat2105 [25]
A ) decrease.
B ) increase.
C ) increase, then decrease.
D ) not change.

The answer is A) decrease

Take pushing a box, for example-- You  push your hardest then give out, still trying to push the box. You are doing less work than what you have started with!

( Mind marking me for branliest? ; ) )
4 0
3 years ago
Consider a bicycle wheel to be a ring of radius 30 cm and mass 1.5 kg. Neglect the mass of the axle and sprocket. If a force of
Charra [1.4K]

To solve the problem it is necessary to apply the Torque equations and their respective definitions.

The Torque is defined as,

\tau = I \alpha

Where,

I=Inertial Moment

\alpha = Angular acceleration

Also Torque with linear equation is defined as,

\tau = F*d

Where,

F = Force

d= distance

Our dates are given as,

R = 30 cm = 0.3m

m = 1.5 kg

F = 20 N

r = 4.0 cm = 0.04 m

t = 4.0s

Therefore matching two equation we have that,

d*F = I\alpha

For a wheel the moment inertia is defined as,

I= mR2, replacing we have

d*F= \frac{mR^2a}{R}

d*F= mRa

a = \frac{rF}{ mR}

a = \frac{0.04*20}{1.5*0.3}

a=1.77 m/s^2

Then the velocity of the wheel is

V = a *t \\V=1.77*4 \\V=7.11 m/s

Therefore the correct answer is D.

4 0
3 years ago
How are energy, force, and the motion of objects related?
OLEGan [10]

Answer:

When two objects interact, each one exerts a force on the other that can cause energy to be transferred to or from the object. For example, when energy is transferred to an Earth-object system as an object is raised, the gravitational field energy of the system increases. This energy is released as the object falls; the mechanism of this release is the gravitational force. Likewise, two magnetic and electrically charged objects interacting at a distance exert forces on each other that can transfer energy between the interacting objects.

Explanation:

Even when an object is sitting still, it has energy stored inside that can be turned into kinetic energy (motion). ... A force is a push or pull that causes an object to move, change direction, change speed, or stop. Without a force, an object that is moving will continue to move and an object at rest will remain at rest.

5 0
3 years ago
Read 2 more answers
An airplane travels 975 miles south from one airport to another at an average speed of 250 mph (miles per hour). How much time w
Maru [420]

Answer:

3.9 hours

Explanation:

7 0
3 years ago
Which sport requires the least amount of agility? HELLLLPPP
ZanzabumX [31]

Answer:

golf

Explanation:

it's less physical strength in more of you hitting the ball with whatever the stick is called

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3 years ago
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