Physics Answers

what will happen if Plano convex lens is replaced by mirror in newton's ring experiment

At the end of successive intervals of 2 seconds,the speed of a speedometer in km/h are 35.6,50.7,61.3,72.5,78.9,84.0,88.1,91.5

From your graph

a) calculate the distance in meters when it moves from 77 to 88km/h

A 0.014-kg string is clamped at both ends. Its linear mass density is 0.034 kg/m. Under what tension in the string will it have a fundamental frequency

A ball is moving at 18m/s in a direction inclined at 60°to the horizontal. The horizontal component of its velocity is?

A spherical shaped vessel of 2 m diameter is 90 mm thick. Find the rate of heat leakage, if the temperature difference between the inner and outer surfaces is 220°C Thermal conductivity of the material of the sphere is 0.09 W/m°C.

TRUE or FALSE

1. The organic starting materials for the preparation of an ester could be water and oxygen.

2. The reaction of water with alkene to produce an alcohol is a/an addition reaction.

3. When an alcohol is dehydrated it forms alkene.

4. Short chain alkanes are prepared through Catalytic cracking.

5. Two isomeric forms of a saturated hydrocarbon have the same molecular formula.

If a 5 kg object experiences a 10 N force for a duration of 0.1 s, then what is the change in momentum of the object?

 In 1920, a 6.5 × 104 kg meteorite was found in Africa. Suppose a meteorite with this mass enters Earth’s atmosphere with a speed of 1.0 km/s. What is the change in the meteorite’s momentum if an average constant force of −1.7 × 106 N acts on the meteorite for 30.0 s? How far does the meteorite travel during this time? 

Find the minimum kinetic energy (in MeV) in the lab system needed by an alpha particle to cause

the reaction:

7𝑁

14 + 𝛼 → 8𝑂

17 + 1𝐻

1

Given that: m(

14N) = 14.00307 u; m(α) 4.003879 u; m(

1H) = 1.00783 u; m(

17O) = 17.0013 u;

1 𝑢 = 931.5 𝑀𝑒𝑉/𝑐

2

Two charges are located on the positive ×-axis of a coordinate system. Charge q1 = 2.00x10-° C, and it is 0.020 m from the origin. Charge q2 =-3.00x10- C, and it is 0.040 m from the origin. What is the electric force exerted by these two charges on a third charge, q3 = 5.00x10-° C, located at the origin?