Can anyone answer all of these for me? 1. Two spherical objects have masses of 300 kg and 1000 kg. A distance of 5 m separates
their centers. Find the gravitational attraction between them.

2. Two spherical objects have masses of 7.5 x 105 kg and 2.3 x 104 kg. A distance of 1200 m
separates their centers. Find the gravitational attraction between them.

3. Two spherical objects have masses of 8.1 x 105 kg and 9.5 x 104 kg. The gravitational
attraction between them is 1.8 x 10-6 N. How far apart are their centers?

4. A 5 kg object is located at a distance of 6.4 x106 m from the center of a larger object whose
mass is 6.0 x 1024 kg.
a. What is the size of the force acting on the smaller object?

b. What is the size of the force acting on the larger object?

c. What is the acceleration of the smaller object when it is released?

d. What is the acceleration of the larger object when it is released?

Classify the following soils according to the uscs classification system. provide appropriate uscs designations. a) this sample of well-graded gravel with sand was obtained from a large earthen dam in vancouver, canada. the sample has 73% fine to coarse sub-angular gravel, 25% fine to coarse sub-angular sand and 2% fines. the maximum size of the particles is 75 mm. the coefficient of curvature is 2.7, while the uniformity coefficient is 12.4. b) this dark brown and wet soil with a “strong organic odor” has 100% passing the no. 200 sieve. the liquid limit of the material is 32% when not dried and is 21% when oven-dried. the plastic index is 21% when not dried. c) this sand has 61% predominantly fine sand, 23% silty fines, and 16% fine sub-rounded gravel size. the maximum size is 20 mm. the liquid limit is 33% and the plastic limit is 27%. d) this soil has 74% fine to coarse sub-angular reddish sand and 26% organic and silty dark brown fines. the liquid limit is 37% when not dried and is 26% when oven dried. the plastic index is 6% when not dried.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.