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projectile is fired with an initial velocity of 193.2 feet per second upward at angle of 300to the horizontal from point 257.6 feet above a level plain. What horizontal distance will it cover before it strikes the level plain? A dart is thrown horizontally with an initial speed of 10 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.2 s later. What is the distance PQ? How far away from the dart board is the dart released? 3 Find the angle of elevation of a gun which fires a shell with muzzle velocity 366 m/s at a target on the same level but 4,575 m distant.
If a chemist titrates 450.0 mL of HBr with a 2.5 M solution of NaOH and requires only 2.2 mL of the base to reach the end point, what is the concentration of the hydrogen bromide?
A chemist reacts 45.0 mL of 3.4 M AgNO3 with an excess of Na2CrO4. How many grams of silver chromate will be produced?
If a chemist has a stock solution of BF3 that is 8.5 M and would like to make 325 mL of 2.0 M BF3, how would she do it?
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
an unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature increase of 15 C. What is the specific heat of the substance
1.Calculate the pH of a base buffer solution composed of 0.20 M NH3 and 0.15 M NH4Cl after the addition of 0.10 M HCl. The Kb of NH3 at 25oC is 1.80 × 10-5.
2.What is the pOH of a buffer solution that is 0.150 M chloroacetic acid and 0.250 M sodium chloroacetate, after the addition of 0.100 M HNO3? The value of Ka for chloroacetic acid is 1.3 x 10-3.
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
Draw a diagram showing the effects of an increase in the price of bus journeys on the equilibrium market price and output in the weekly market for e-scooters in the UK.
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).
#339914 on Dec 2023