A nerve impulse is propagated across a synapse when the neurotransmitter acetylcholine is released from the pre-synaptic membrane and diffuses across the 20-nm-wide synaptic cleft to the post-synaptic membrane.

A kangaroo can jump over an object 2.7 m high. a. Calculate its vertical speed when it leaves the ground, in meters per second. b. How many seconds is it in the air?

The heart of a resting adult pumps blood at a rate of 5.00 L/min. a. Convert this to cm^3/s.b. What is this rate in m^3/s?

6. A train is moving with a constant speed. The train moves 60 meters for every 1.5 seconds that elapses. a. Assume that we get 40 by dividing 60 by 1.5. What is the name that is commonly given to a quantity represented by this number 40? b. To denote the quantity completely, what additional information must be given besides the number 40? c. How would you interpret the number 40 in this instance? Your answer should mention distance and time. d. Use your interpretation (not algebra) to find the distance the train moves in 2.5 seconds.

Determine the discharge (Q) and velocity in pipe 3. a. 0.1876 m3/s and 6.44 m/s b. 0.1767 m3/s and 6.44 m/s c. 0.1767 m3/s and 4.78 m/s d. 0.1876 m3/s and 4.78 m/s

A car is traveling due East at a rate of 36.2 kph and a train is due North at a speed of 74.70 kph and bound to meet at an intersection 1 km for the train and the car. a. Determine the acceleration of the car, If the car reaches the intersection 10 seconds ahead of the train. b. Determine the velocity of the car at the intersection.

Two trains are 900.0 kilometers apart. One is in Portland. The other is in San Francisco. They both begin traveling toward each other at the same time. The Portland train travels with an average velocity of 80.0 km/hr South. The San Francisco train travels North with an average velocity of 65.0 km/hr North.a. At what time will the two trains meet?b. How far away will they be from Portland when they meet?

12. Acceleration is defined as the change in velocity with respect to time. a. True b. False 13. Among the units that acceleration has in the metric system or international system, is the unit of meters over seconds a. True b. False 14. The three fundamental quantities measured by any measurement system are length, mass, and density a. True b. False

Suppose that critters are discovered on Mars that measure distance in boogles and time in bops. A. What would units of speed be in this system? Explain. B. What would units of velocity be in this system? Explain. C. What would units of acceleration be in this system? Explain.

I am only asking for help on the a, b, and c questions. ?