Physics Answers

El pH de una solución de 0.02 M de un ácido débil desconocido es 3.7. ¿cuál es el pKa de este ácido?

Define the term radius of gyration

Write down the formular for it

Define the term TORQUE of a body about an axis of rotation

Evaluate the moment of inertia of a tin rod with axis of rotation at the center ,if its lenght is 100cm and its mass is 2.3kg

What is the difference between Rotational K.E And linear K.E

write down tgere formular and compare them

What is a rigid body?is there any such in nature?

And what is rotational motion?give two examples of bodies that undergo this type of motion.

A body start from rest and moves uniformly or accelerate uniformly at 20m/sec for 4sec .it then continues with this velocity for another 10sec before it is uniformly brought to rest in a further 5sec .draw the velocity time graph for the motion or the body and find its acceleration and find its retadiation and distance travelled during the uniform velocity and total distance travelled

The kettle's added power is 2.1 kW and it takes 1 min

and 55 s for the water to boil.

Calculate how much energy is required to boil the water.

A 0.10mm diameter glass tube is dipped into a pool of ethanol. To what height above the level of ethanol in the pool will the liquid in the capillary tube rise

A ball (ball A) was thrown with an initial velocity of 15 meters per second. After 1.15 seconds, another ball (Ball B) is thrown with an initial velocity of 12 m/s. At what height do they collide?

 On its maiden voyage in July 1952, the liner United States won the coveted Blue Ribbon for the fastest crossing of the Atlantic from New York to Cornwall, U.K. The trip took 3 days 10 hours 40 min at an average speed of 34.5 knots (65.5 km/h). This was 10 h 2 min less than the 14-year-old record held by the Queen Mary. What was the average speed of the Queen Mary

A 2.6 kg object is tied to the end of a cord and whirled in a horizontal circle of radius 3.3 m completing one revolution in 7 seconds. Determine the velocity of the object to one decimal place.