Top answers

What is the gravitational force between two steel spheres of radius 10 meters and density 8000 kilograms per meter cubed

Use Newton's Law of Gravitation and treat steel balls as point masses.You will get 187 Newtons.
RS
Answered by Rajan S. • Physics tutor
2206 Views

Calculate the time taken for 1000L of water at rtp to be heated to 40degrees celsius using a 40kW heater

First the starting parameters of the fluid should be calculated, so at rtp the density of water is 1kg/L therefore mass is 1000kg and the temperature is 20 degrees C. The next step would be to plug these val...
CA
Answered by Cameron A. • Physics tutor
3335 Views

What is a vector quantity

A vector quantity is a quantity that has both a magnitude and a direction.
TE
Answered by Tobias E. • Physics tutor
2668 Views

What is the difference between gravitational potential energy and gravitational field strength?

Gravitational Potential Energy is the work done in moving a mass from infinity to a point in a gravitational field. On the other hand, Gravitational Field Strength is the force exerted per unit mass on a sma...
AB
Answered by Andrea B. • Physics tutor
24070 Views

A pellet of mass 8.8 g embeds itself in a wooden block of 450 g which is suspended by a light in-extensible string. After the collision the block reaches a max height of 0.63 m. Calculate the initial velocity of the pellet.

Max Gravitational Potential energy of combined mass:GPE = m x g x h= ( 0.0088 kg + 0.450 kg ) x 9.81 ms^-2 x 0.63 m = 2.84 J Therefore Kinetic energy of the combined mass at the collision = 2.84 JKE = 1/2 x ...
TL
Answered by Thomas L. • Physics tutor
6076 Views