Physics Answers

A drug is being delivered into a patient's arm at a rate of 10 mL min-¹. The drug is being delivered from a syringe through a 5 cm long needle with an internal diameter of 1mm. If patient's blood pressure is 110mmHg (+15.0 kPa gauge preasure, and ignoring the variation from systolic to diastolic), what must the pressure in thw syringe be? (ndrug= 8.90x10-4 Pa.s

Describe in a creative way the effect of temperature increases on the resistance of a metallic conductor. Also, describe the ability of the material to conduct current in terms of its resistivity and conductivity.

Note: You may express your answer through a drawing, just by making a slogan or a poster. It is all up to you as long as you can describe

The power of the heater is 2.4W. 1. Calculate how long it takes for the heater to supply the energy calculated in (a)(i).

Barney walks at a velocity of 1.7 meters/second on an inclined plane, which has an angle of 18.5° with the ground. What is the horizontal component of Barney’s velocity?

Two bodies of masses 10kg and 4kg are moving in opposite directions with the same velocity of 5 meter per seconds .if they collide and stick together after the impact,calculate their velocity

The resistance of a wire of length 100cm diameter 0.3mm is found to be 3.0 ohms Calculate (1) the resistivity (2) the conductivity of the material of a wire

1. Salim has a paper route. In the winter time, he puts his newspapers on a toboggan to pull them through the snow. The combined mass of the papers and the toboggan is 24 kg. The coefficient of static friction between the toboggan and the snow is 0.18. The coefficient of kinetic friction between the toboggan and the snow is 0.10.
2. With how much force must Salim pull in order to get the toboggan to start moving?
3. How much force is needed to keep the toboggan moving at a constant speed?

A bucket full of water and weighing 200N is supported by two men holding the handle at each side, each pulling sideways at an angle of 30° to the vertical. Find the force in each man's arm.

Calculate the average acceleration needed by a train travelling initially at 12m/s[E] to stop in 120s.