What is the mass of the sun plus all the planets in solar system?

Determine the image distance and image height for a 5.00 cm tall object placed 30.0 cm from a double convex lens with a focal le

vlabodo [156]

Answer:

The image distance is 30 cm

image height = - 5 cm

Explanation:

The formula for calculating the image distance is expressed as

1/f = 1/u + 1/v

where

f is the focal length

u is the object distance

v is the image distance

From the information given,

u = 30

f = 15

By substituting these values into the formula,

1/15 = 1/30 + 1/v

1/v = 1/15 - 1/30 = (2 - 1)/30 = 1/30

Taking the reciprocal of both sides,

v = 30

The image distance is 30 cm

magnification = image height/object height = - v/u

Given that object height = 5 cm, then

image height/5 = - 30/30 = - 1

image height = - 5 * 1

image height = - 5 cm

8 0

1 year ago

Which is the BEST explanation for why the speed of sound changes for solids, liquids, and gases?

garik1379 [7]

the reason why sound travels faster in solid is because the molecules in solid is more close to each other and they allow the waves of the sound to travel quickly or easily. and same reason why the sound travels fast in liquid that gas, it's because the molecules in liquid is closer to each other than the molecules in gas but they're not as close as solid hence why solid is the fastest at traveling sound

5 0

3 years ago

Can someone help me? My homework is due on Friday and I really need help. Does the speedometer on a car give you the instantaneo

alexandr402 [8]

Answer:

"instantaneous"
sample the speed at regular intervals and compute the average
use more samples and/or more regular intervals and/or use a weighted sum that approximates the curve between readings.

Explanation:

A speedometer is designed to give an approximation of instantaneous speed. It is an average over a short time interval, typically less than a second or two.

__

If you have only the speedometer as reference, you need to write down its speed reading on several occasions, roughly equally-spaced in time. The average of these readings will be an approximation of your average speed.

To get a better average, shorten the intervals and make them more evenly-spaced. You can also compute various weighted averages of these speed readings.

5 0

4 years ago

What is being transferred with a wave?

dimaraw [331]

Answer:

<u>C: Energy </u>

Explanation:

Waves can transfer energy over large distances.

7 0

4 years ago

A ball of mass 0.7 kg flies through the air at low speed, so that air resistance is negligible. (a) What is the net force acting

Fed [463]

Answer:

A) Gravitational Force, $F=-6.86N$ .

B) The y component of momentum.

C) The x component of momentum will remain the same.

D)The y component of momentum decreases.

E)The z component of momentum will remain constant.

Explanation:

First, let the x-axis be positive in the same direction as the horizontal speed of the ball, let the y-axis be positive in the opposite direction of gravity.

A) since there is no air resistance, the only force acting on the ball is the gravitational force. This force is downwards so it is negative. The net force is

$F=-9.8*0.7=-6.86N$ .

B)Because the net force (and the only one) is on the y-axis, only the vertical component of the momentum will be changed due to the force.

C)Since there is no resistance of air, the ball behaves as in projectile motion problems, this means that the x component of the velocity remains constant, also does the mass. Remembering that momentum is velocity times mass, it can be easily seen that x component of momentum remains constant too.

D)The y component of momentum decreases, this is because gravity decreases the y component of the velocity.

E)Since there is no z component of the force there is no change in the z component of the momentum.

5 0

3 years ago