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Two smaller spherical raindrops collide and merge into one larger spherical raindrop. What is the radius and surface energy of this larger drop, compared to the two smaller ones?

An object's two dimensional velocity is given by #v(t) = ( t^2 +2t , cospit  3t )#. What is the object's rate and direction of acceleration at #t=1 #?

Can someone verify my answer?

Question #108b1

If there is a nonzero net force acting on an object, what is happening to the motion of that object?

Question #ccb06

Question #fe66b

If the earth were to suddenly contract to#(1/n)th# of its present radius without any change in its mass, the duration of the new day will be nearly (in hours) ??

After 2 seconds of flight,the velocity of a projectile is (12i4j)m/s,Find its speed and elevation at moment of projection?

What is the frequency of the body at the centre of the earth?

Question #7cd1e

Which of the following is the image of the number in the mirror?

A boy is sat at a semisphere with a ray of 18.4 m. He starts sliding. On what height will the boy loose contact with the sphere? There is no friction.

If an electron is placed in an electric field with a potential difference of (1.35x10^2) V, the maximum speed the electron can attain is?

The rate of rotation of a solid disk with a radius of #2 m# and mass of #2 kg# constantly changes from #5 Hz# to #9 Hz#. If the change in rotational frequency occurs over #4 s#, what torque was applied to the disk?

Question #39ff1

Question #68b86

A #5# #L# container holds #8 # mol and #5 # mol of gasses A and B, respectively. Groups of five molecules of gas B bind to two molecules of gas A and the reaction changes the temperature from #100# #K# to #240# #K#. How much does the pressure change?

An object is thrown with half of the kinetic energy needed to free an object from the attraction of the earth. How far will the object reach from the earth's surface?

Angular momentum of a particle rotating with a central force is constant due to..??