convert a speed of 4.50km / h to units of ft / min (1.00 m = 3.28ft)

given that A+2B = x1j +y1j and 2A-B = x2i + y2j what is A?

A force F, of magnitude 6.00 units acts on an object at the origin in a direction 0 = 30.0° above the positive x-axis (Fig. P1.58). A second force É2 of magnitude 5.00 units acts on the object in the direction of the positive y-axis. Find graphically the magnitude and direction of the resultant force F, + F2. Figure P1.58

Problem 1: Suppose A = (-3.03 m)i + (4.35 m)j, B = (2.71 m)i + (-4.29 m)j + (2.99 m)k, and D = (-2.48 m)i + (-4.5 m)j. Part (a) What is the angle, in degrees, between D and A? Numeric : A numeric value is expected and not an expression. Part (b) What is the angle, in degrees, between D and B? Numeric : A numeric value is expected and not an expression.

Which one are units and explain ?

For a short time, the speed v of a car, in m / s, is given by v = at2 + bt3, where t is the time in seconds. The units of a and b are, respectively,   a) m/s^2; m/s^3 b) m/s^4; m/s^5 c) s^3/m; s^4/m d) m.s^2; m.s^4 e) m/s^3; m/s^4

Physics

If D = (6.00î – 4.00ĵ) m, B = (-3.0oî + 5.00ĵ) m, and A = (-24.0î + 4.00ĵ) m, find the unknown constants a and b such that aD + bB + A = 0. a = b =

Perform these operations in scientific notation with the appropriate number of significant figure 2.80*10-5 km + 1.14*105 cm.

A rectangular container measuring 18 cm ⨯ 45 cm ⨯ 61 cm is filled with water. What is the mass of this volume of water in kilograms and grams? (Take the density of water to be 1000 kg/m3.)