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Lerok [7]
3 years ago
15

If an object is placed between a convex lens and its focal point, which type of image will be produced?

Physics
2 answers:
Andreas93 [3]3 years ago
8 0
<span>virtual, upright, and magnified</span>
Nastasia [14]3 years ago
4 0

Answer:

virtual, upright and magnified

Explanation:

As we know by lens formula

\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}

now we know that

d_o < f

now we have

\frac{1}{d_i} = \frac{1}{f} - \frac{1}{d_o}

now we have

d_i = -\frac{d_o f}{f - d_o}

now the magnification is given as

m = \frac{d_i}{d_o}

m = -\frac{f}{f - d_o}

Since here magnification is negative

so image is virtual and upright

also we can see from equation

m > 1

so here we have

virtual, upright and magnified

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The angular velocity of a 755-g wheel 15.0 cm in diameter is given by the equation ω(t) = (2.00 rad/s2)t + (1.00 rad/s4)t 3. (a)
Lunna [17]

Answer:

a

The number of radians turned by the wheel in 2s is   \theta= 8\ radians

b

The angular acceleration is  \alpha =14 rad/s^2

Explanation:

        The angular velocity  is given as

                 w(t) = (2.00 \ rda/s^2)t + (1.00 rad /s^4)t^3

Now generally the integral of angular velocity gives angular displacement

           So integrating the equation of angular velocity through the limit 0 to 2 will gives us the angular displacement for 2 sec

    This is mathematically evaluated as

            \theta(t ) = \int\limits^2_0 {2t + t^3} \, dt

                  = [\frac{2t^2}{2} + \frac{t^4}{4}] \left\{ 2} \atop {0}} \right.

                  = [\frac{2(2^2)}{2} + \frac{2^4}{4}] - 0

                  = 4 +4

                 \theta= 8\ radians

Now generally the derivative  of angular velocity gives angular acceleration

      So the value of the derivative of angular velocity equation at t= 2 gives us the angular acceleration

    This is mathematically evaluated as          

           \frac{dw}{dt}  = \alpha (t) = 2 + 3t^2

so at t=2

            \alpha (2) = 2 +3(2)^2

                   \alpha =14 rad/s^2

7 0
3 years ago
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Answer:

4. both blocks will both have the same amount of kinetic energy.

Explanation:

When the blocks are released free from the compression force, the spring exerts equal and opposite force on each block but the block with heavier (double) mass will attain slower ( half ) speed as compared to the lighter block according to the law of inertia. This works in synchronization to energy conservation.

Spring force is given as:

F=k.\Delta x

where: \Delta x= length of compression in the spring

<u>We know kinetic energy is given by:</u>

KE=\frac{1}{2} m.v^2

Hence the kinetic energy of both the blocks is equal when they are released to move free.

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4 years ago
What is the law of conservation of energy?
geniusboy [140]

Answer:

The answer is A

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