What does it mean to say that the forces acting on an object are balanced? a. the forces occur as pairs of forces with equal magnitude and direction. b. all the forces combine to give zero net force. c. the sum of the horizontal forces is zero. d. the forces all have the same magnitude.

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.