-cup (a) How long is a microcentury in minutes!
actual - approximation
(b) Using percentage difference
find the percentage
actual
difference from the approximation
3. Earth has a mass of 5.98 x 1024 kg. The average mass of the atoms that make
up
Earth is 40 u. Determine how many atoms are there in Earth? i-1-68X10
4. The fastest growing plant on record is a Hesperoyucca whipplei that grew 3.7 m in
days. Calculate its growth rate in picometers per second?
5. Serena Williams can sometimes serve a tennis ball at 75 m/s. The length of a tenn
court is 78 ft. Determine approximately how long her opponent have to react, from
the instant she sees Serena hit the ball until the ball reaches the opponent?
mouhat in size hut a diameter of 2.0 um is not unusual. What​

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.