Question 1 1 pts
What is the mass of an object that is being dragged across a floor with a force of 7 N at
an angle of 33 degrees if the frictional force acting on the object is 2.2 N and the
acceleration of the object is 2.6 m/s2 ?

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.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s