Basic Science T...

A man holds a ball of (1/2) kg in his hand. He throws it vertically upward. During this process his hand moves up by 40 cm and the ball leaves his hand with an upward velocity of 4 m/s. The constant force with which the man pushes the ball is

A square plate having mass m and side length 'a', its moment of inertia along the axis passing through its diagonal is-

A force of 100 N need to be applied parallel to a smooth! inclined plane just to hold a body on it. The angle inclination of the inclined plane is $$30^{0}$$. How much horizontal force need to be applied to do the same?

Moment of inertia of a thin circular plate of mass M, radius R about an axis passing through its diameter I. The moment of inertia of a circular ring of mass M, radius R about an axis perpendicular to its plane and passing through its centre is 

A man and woman are both heterozygous for the recessive allele that causes cystic fibrosis. What is the probability that their first two off spring will have the disorder ?

Let us consider a system of units in which mass and angular momentum are dimensionless. If the length has dimension of L, then the dimension of power is

A long capillary tube with both ends open is filled with water and set in a vertical position. The radius of the capillary is $$0.1\ cm$$ and surface tension of water is $$70$$ dynes/ cm. The length of the water column remaining in the capillary tube will be approximately.

A torque of magnetude 200 Nm acting body produces an angular acceleration of 8 $$ rad / s ^{ 2} .$$ . The moment of inertia of the body is 

A torque of magnetude 200 Nm acting body produces an angular acceleration of 8 $$ rad / s ^{ 2} .$$ . The moment of inertia of the body is 

If $$Z= \frac{A}{A-B}$$ and $$A$$ and $$B$$ are measured with error $$\Delta A$$ and $$\Delta B$$ respectively, then relative error in $$Z$$, that is $$\frac{\Delta Z}{Z}$$ is equal to