If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens, what is the height of the image? A. 6 millimeters
B. 8 millimeters
C. 14 millimeters
D. 22 millimeters

Answers

Answer 1

Answer: The correct answer is letter A. 6 millimeters. If an object 18 millimeters high is placed 12 millimeters from a diverging lens and the image is formed 4 millimeters in front of the lens, the height of the image is 6 millimeters.

Solution:
18 / x = 12 / 4
12x = 72
x = 6mm

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Which of these statements about resistance is true? Choose the best answer.A. The greater the resistance, the easier it is for electricity to flowB. The greater the resistance, the less thermal energy is produce.C. The greater the resistance, the more electrical energy is produced.D. The greater the resistance, the more electrical energy is produced.
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How much energy is contained in matter with mass of 1 gram (0.001 kilogram)

Answers

The mechanical energy consisting of potential and kinetic energy is:

0.001 x [ (acceleration of gravity x height) + (1/2) (speed)² ] .

You want to know how much [ mc² ] there is in 1 gram of mass.

E = m c² = (0.001) x (3 x 10⁸)² = 9 x 10¹³ joules

That's the energy that a 1,000-watt toaster uses
in 2,852 years of continuous toasting.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Hope that helped!

5. Which of the following sets of conditions would result in the highest velocity for a sound wave traveling through air? A. A warm and humid day with a wind moving in the same direction as the sound
B. A warm and dry day with a wind moving in the opposite direction as the sound
C. A cold and dry day with a wind moving in the same direction as the sound
D. A cold and humid day with no wind

Answers

The answer is A. A warm and humid day with a wind moving in the same direction as the sound.

Sound waves travel through a medium such as solid, liquid, or gas. It travels faster when the molecules of its medium are closer together. This is the reason why it travels the slowest through dry air. When air is wet or humid, sound can travel faster because sound travels faster through water.

When sound waves pass through air, the most important factor that affects it is temperature. The higher the temperature, the faster the molecules vibrate. This allows sound waves to travel faster.

The answer is A. A warm and humid day with a wind moving in the same direction as the sound. hope this helps!!!!

Why voltmeter and resistence are parallel in ohm's law.

Answers

Never mind Ohm's Law. A voltmeter measures the difference in electrical potential
between two points. So if you want to measure the difference in electrical potential
between two points, you touch one probe of the meter to each point, and somehow
the internal guts of the meter are able to sense the difference in electrical potential
between the two points.

If the two points have non-reactive impedance (a resistance) between them, then the
difference in electrical potential between the two points, as indicated by the meter,
will be close to (resistance between the two points) x (current flowing between them).

Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. What effect does this have on collisions

Answers

Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. What effect does this have on collisions

The effect of the gymnast on the collision will increase. An elastic collision is when two bodies collide and separates after collision conserving the total kinetic energy before and after collision.

Answer:

it increces the time of the fall

Explanation:

A device that conveys information with analog signals and digital signals is called _____.a) an electron device

b) an electrical device

c) an electric device

d) an electronic device

Answers

I believe the correct answer from the choices listed above is option D. A device that conveys information with analog signals and digital signals is called an electronic device. They are components for controlling the flow of electrical currents for the purpose of information processing and system control.

the correct answer is D

A suitcase (mass m = 18 kg) is resting on the floor of an elevator. The part of the suitcase in contact with the floor measures 0.50 m × 0.15 m. The elevator is moving upward with an acceleration of magnitude 1.6 m/s2. What pressure (in excess of atmospheric pressure) is applied to the floor beneath the suitcase?

Answers

Answer:

P=2736 Pa

Explanation:

According to Newton we have that:

∑ $F=m*a\n$

A force is exerted by the elevator to the suitcase, according to 3th Newton's law an equal force but in the opposite direction will appeared on the suitcase, that is:

∑ $F=m*g+m*a=m*(g+a)$