An object with mass=0.2kg is at rest on a horizontal table top. It is then pushed a distance of 0.1m to the edge of the table by a 2N force applied horizontally to it. The friction force between the object and the table is 0.5N. The object then falls a distance of 1m directly down onto the floor where it comes to rest. Calculate the amount of net work done on the object, 1.85 J -2.15 J OJ 2.15 J -1.85 J O O

) if A = = 3i+4j +2K and B= -2i +6j +5k find A. B. (A .B änjö ) جد قيمة • B

A study fonds that the metabolic rate of mamals is proportional to the mass of the mamal carried to the exponent of (3/4). By what factor does the metabolic rate of a 70.0 kg human exceed that of a 6.30 kg cat?\ 70.0 3/4 kg    = 6.09 6.303/4 kg I set up the values as a ratio and came up with 6.09. OK, I answered my own question. That is the correct answer.

Question 3

The total surface area of the United States is 9.6 x 106 km². Seventy-four percent of this land can support spiders. Given that there are approximately 5.0 × 104 spiders per acre, how many spiders are there in the Uni d States? Recall that 1 acre = 0.004 km2. Number i 8.75 *10^13 Units sniders

The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. dimes would be in a stack of the same height? Each dime is 1.35 mm1.35 mm thick. number of dimes:     Each dime has a mass of 2.268 g.2.268 g. How much would the stack of dimes from the previous question weigh? mass:   g What is the value, in dollars, of the same stack of dimes? value:   dollars The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars.19,390,604,000 dollars. How many Statue of Liberty‑height stacks of dimes are needed to match the GDP in value? number of stacks:

Express the answer in standard scientific notation with the appropriate number of significant figures. a. The mass of a blue whale, 180000 kg. ____ x10 ^___kg b.  The diameter of a helium nucleus, 0.000 000 000 000 003 8 m. ____ x10 ^___m

Evaluate the dot product A - Bif A = 2i +7j and B = 7i – 5j. ? A-B= Submit Request Answer Part B Evaluate the dot product A - Bif à = 2î – 7j and B = 5i +7j.

Consider the 2D vectors A and B. A has a magnitude of 3.5 and a polar angle of 55 degrees, while B has a magnitude of 4.5 and a polar angle of 245 degrees. a) Express A + B in cartesian form. b) Find the magnitude of A + B. c) Find the direction of A + B. d) Express A −B in cartesian form. e) Find the magnitude of A −B. f) Find the direction of A −B.             Test 1 Review ProblemsPhysics 30Ad) Express A −B in cartesian form. e) Find the magnitude of A −B.f) Find the direction of A −B.

A homeowner is told that she must increase the height of her fences 56.0% if she wants to keep the deer from jumping in to eat the foliage and blossoms. If the current fence is 2.12 m high, how high must the new fence be?