A child does 350 J of work while pulling a box from the ground up to his tree house at a steady speed with a light rope. The tree house is above the ground. What is the mass of the box?
A) 8.9 kg
B) 5.3 kg
C) 6.7 kg
D) 8.0 kg
Question 2
Which of the following statements about spherical mirrors is correct? (There could be more than one correct choice.)
A) A concave mirror always produces a real image.
B) A convex mirror always produces a virtual image.
C) A concave mirror always produces a virtual image.
D) A convex mirror always produces a real image.
E) A convex mirror always produces an upright image.
Ground Pine
Madonna and Child with St. Anne and Infant St. John the Baptist.
Recommendations for Family and Work Intersection
Spring force, crankcase pressure, and intake manifold vacuum work together to regulate the flow rate ...
Tree of life
photosynthesis of a tree "التركيب الضوئي"