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1. math

   an express train makes a run of 240 km at a certain speed. another train whose speed is 12km/hr less takes an hour longer to cover the same distance. find the speed of the express train in km/hr.

2. College Physics

   Two forces, F⃗ 1 and F⃗ 2, act at a point, as shown in the picture. (Figure 1) F⃗ 1 has a magnitude of 8.20N and is directed at an angle of α = 55.0∘ above the negative x axis in the second quadrant. F⃗ 2 has a

3. Physics

   Mars, on average, is 140 million miles from the Sun. 1 mi = 1609 m . Part #1: Express the distance between Mars and the Sun in meters using powers of 10. Express your answer using two significant figures. Answer: d =2.25×10^11 m

4. physics

   Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( -15 m )y^ Express your answer in degrees using three significant figures. θA = Part B Express your answer in meters using two significant figures.

1. Physics

   A 300 g block on a 54.0 cm -long string swings in a circle on a horizontal, frictionless table at 85.0 rpm . What is the speed of the block? Express your answer with the appropriate units. What is the tension in the string?

2. maths

   express 40% of right angle into radian measure. express two third of straight angle into radian. express sum of angles of a quadrilateral intoradian.

3. Calc

   An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really

4. physics

   The description for a certain brand of house paint claims a coverage of 460ft^2/gal. A) Express this quantity in square meters per liter. B)Express this quantity in quantity in a SI unit (i.e, meters to the power-1, looks like

1. geography

   Which statement correctly explains a connection between ethnic conflict and nationalism? A. Those with strong feelings of nationalism may express anger over a perceived outsider. B. People express nationalism as a centrifugal

2. math

   (i) Express the complex number z = 4i/(1-i√3)in Cartesian form. (ii) Determine the modulus and argument of z, and hence express z in polar form. (b) Solve the equation z4 − z = 0, expressing your solutions in Cartesian form.

3. Math

   1.Express 5/8 as a decimal. A.0.375 B.0.40 C.0.625 D.0.875 2.Express 1 1/20 as a decimal A.1.1 B.1.05 C.1.5 D.1,2 3.Express 2.65 as a mixed number in lowest terms A.2 13/20 B.2 49/100 C.2 9/100 D.2 2/5 4.Order the set of numbers

4. physics

   An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two

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