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3 years ago

Which of the following represents a virtual image?

Physics

2 answers:

Naily [24]3 years ago

7 0

Answer:

Option (d)

Explanation:

In case of lenses, the image is said to be virtual if the rays of light after refraction appears to meet at a point.

If an object be placed to the left of a lens and image is also formed to the same side, i.e., left of the mirror, the image is said to be virtual .

By using the sigh conventions, the distance of image on the left has a negative sign .

So, - di be the location of virtual image.

erma4kov [3.2K]3 years ago

3 0

The answer for Apex is D.

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Carlos uses a rope to pull his car 30 m to a parking lot because it ran out of gas. If Carlos exerts 2,000 N of force to pull th

Mariulka [41]

Answer:

Explanation:

Remark

The only thing that might trip you up is what to do with the angle. The vertical component of the 15 degrees does no work against anything. So the 15 degrees limits the horizontal force.

The formula is

Work = F * d * cos(15)

The givens are

F = 2000 N

d = 30 m

Cos(15) = 0.9659

Solution

Work = 2000 * 30 * cos(15)

Work = 57,955

Rounded to two places would be 5.8 * 10^4

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3 years ago

Read 2 more answers

What is the approximate energy required to raise the temperature of 1.00 L of hydrogen by 90 °C? The pressure is held constant a

Oliga [24]

Answer:

Q = 116.8 J

Explanation:

Here given that the temperature of 1 L hydrogen is increased by 90 degree C at constant pressure condition.

So here we will have

$Q = n C_p \Delta T$

here we know that

n = number of moles

$n = \frac{1}{22.4}$

$n = 0.0446$

for ideal diatomic gas molar specific heat capacity at constant pressure is given as

$C_p = \frac{7}{2}R$

now we have

$Q = (0.0446)(\frac{7}{2}R)(90)$

$Q = 116.8 J$

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3 years ago

A fourth-grade teacher wants to ensure students understand the life cycle process of plants. The teacher decides to incorporate

Annette [7]

Answer:

There are several options that the teacher can use to incorporate the concept into students' understanding.

Explanation:

1. The students can draw all the plants that they know.

2. Children can be asked to bring the flowers to school so that they can identify the plants themselves.

3. The children can plat the flowers in makeshift pots and then take the best plants and transplant them in the garden or elsewhere.

4. The children can take occasional trips and observe and record any changes to the plants.

4. The teacher can ask the students to draw the flowers and emphasize on the productive parts like the stamens, leaves, pistils, stems.

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3 years ago

Which circuit has the larger equivalent resistance: a circuit with two 10 ohm resistors connected in parallel or a circuit with

Ganezh [65]

Answer:

A circuit with two 10 ohm resistors connected in series.

Explanation:

The formula for the equivalent resistance for resistors in parallel is

$\frac{1}{Rt} = \frac{1}{R1} + \frac{1}{R2}$ So if R1=R2= 10 $\frac{1}{Rt} = \frac{1}{10} + \frac{1}{10} = \frac{2}{10} Rt =\frac{10}{2} =5 ohm$

The formula for the equivalent resistance for resistors in series is

Rt = R1 + R2 So Rt= 10 + 10 = 20

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3 years ago

Which term defines the energy of motion?

damaskus [11]

Its (a) and(a)for the other ? and the last one is (d)

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2 years ago