Ask question

Ask question

All categories

3 years ago

14

Create a group of 3-4 students. Using your cell phone flashlight and the filter, create a "blue" flashlight, "red" flashlight, a

nd "green" flashlight. Shine all three flashlights at the white index card. Describe what you observe.

1 answer:

Korvikt [17]3 years ago

4 0

Answer:

the light creates sorta a mixture of all the colors on the white index card.

You might be interested in

A projectile is launched in the horizontal direction. It travels 2.050 m horizontally while it falls 0.450 m vertically, and it

kari74 [83]

Answer:

0.303s

Explanation:

horizontal distance travel = 2.050 m, vertical distance travel = 0.45 m

Using equation of linear motion

Sy = Uy t + 1/2 gt² Uy is the inital vertical component of the velocity, t is the time taken for the vertical motion in seconds, and S is the vertical distance traveled, taken downward vertical motion as negative

-0.45 = 0 - 0.5 × 9.81×t²

0.45 / (0.5 × 9.81) = t²

t = √0.0917 = 0.303 s

4 0

4 years ago

Changes in the forms of energy are called

Dima020 [189]

<span>Changes in the forms of energy are called "Energy Conversions"

Hope this helps!</span>

5 0

3 years ago

An object is placed 50cm in front of a concave mirror of radius 60cm. How far from the mirror is the image?

Shkiper50 [21]

Answer:To explian the exact calculation of this pruduct we must not try!

3 0

3 years ago

A bag is dropped from a balloon that is 50m above the ground and rising at 15m/s. calculate

ANTONII [103]

Answer:

See the answers below

Explanation:

We can solve this problem using the principle of energy conservation. That is, the energy is conserved before and after dropping the bag.

For this case we have mechanical energy, which is the sum of the kinetic and potential energies.

$E_{1}=E_{2}$

where:

$E_{1}=E_{k}+E_{p}\\E_{2}=E_{p}$

Ek = kinetic energy [J] (units of Joules)

Ep = potential energy [J]

In the final Energy (2), there is only potential energy. since when the balloon reaches the maximum height its velocity is zero, that is, there is no kinetic energy.

A)

$m*g*h+\frac{1}{2}*m*v^{2} =m*g*h_{1} \\9.81*50+0.5*(15)^{2}=9.81*h_{1}\\h_{1} = 61.46 [m]$

B)

With the value calculated above we can find the acceleration of the balloon.

The distance traveled is the difference between the maximum height and 50 meters.

$x = 61.46-50\\x = 11.46[m]$

With the following equation of kinematics.

$v_{f}^{2} =v_{o}^{2}+2*a*x$

$0 = 15^{2} +2*a*11.46\\a = - 9.816 [m/s^{2} ]$

The negative sign indicates that the acceleration acts downward. That is, in the opposite direction to the movement.

We can use the following equation of kinematics to find the final velocity after 4 seconds.

$v_{f}=v_{o}-a*t\\v_{f}=15-9.816*(4)\\v_{f}=-24.24 [m/s]$

Now the distance:

$v_{f}^{2} =v_{o}^{2}-2*a*x\\(24.24)^{2} =(15)^{2} -2*9.81*x\\x = 18.48 [m]\\x_{f}=50+18.48 = 68.48 [m]$

c) Using the following equation of kinematics.

$v_{f}=v_{o}-a*t\\0 = 15-9.81*t\\15=9.81*t\\t = 1.52 [s]$

4 0

3 years ago

When a body moves from point A to point B the distance travelled in 500 meters with in a given time of 0.6 hours and find out th

Sav [38]

Answer

Explanation:

Convert the time to seconds = 0.6 × 60 × 60

= 2160seconds

Velocity = distance ÷ time

Velocity = 500 ÷ 2160

Velocity = 0.23meters per seconds(m/s)

Acceleration = Velocity ÷ time

Acceleration = 0.23 ÷ 2160

Acceleration = 0.000106meters per seconds ²(m/s²)

6 0

3 years ago