Object 1 and 2 attract each other with a electrostatic force of 36.0 units. If the charge of object 1 is changed to four times the original value, then the new electrostatic force will be

White light falls on a yellow filter, if: (a) A green filter is placed behind a yellow filter, what is the colour of the light that will emerge from the green filter?

An object is moving initially with a velocity of 4.7 m/s. After 3.9 s the object's velocity is - 2.1 m/s. What is the object's average acceleration during this time? I believe that the vf is - 2.1 m/s vi should be 4.7 m/s and the t should be 3.

What instrument is normally used to measure atmospheric pressure? a. thermometer b. barometer c. hydrometer d. spectrometer

Which sound wave features are being described? The number of wavelengths/time: Distance traveled/time:

Two objects are raised off the ground and one of them is three times as high as the other one. How do their potential energy compare?

An object with a mass of 100 g is in free fall. What is the speed of the object after it has fallen for 4 seconds? A. 39 m/s B. 9.8 m/s C. 25 m/s D. 96 m/s

How was the water filtered to remove debris and living organisms?

What causes physical vibrations in transformers at twice the frequency of the AC power involved.

Projectile motion is a combination of which two types of motion? parabolic and curved straight and diagonal horizontal and vertical constant and linear

If a mass of a material is 100 grams and the volume of the material is 15 cm3, what would the density of the material be?