The force of earth's gravitational field is always directed downwards (towards the center of the earth. When the ball is thrown up, it is going against the earth's gravitational field and so, the earth's gravitational force pulls it back down, accelerating it downwards.
Answer:
a.Electric force exerted on one charged sphere, by another charged sphere.
Explanation:
Coulomb's Law describes the electric force between two objects. It is given by the following formula:

The magnetic field surrounding a current carrying conductor is described by Ampere's Law.
Amount of heat generated by a high current flow in a resistor can be described by P = VI
Voltage induced in a coil by a constant magnetic field is described by Faraday's Law.
When silver is poured into the mould the it will solidify
In this process the phase of the Silver block will change from liquid to solid.
This phase change will lead to release in heat and this heat is known as latent heat of fusion.
The formula to find the latent heat of fusion is given as

here given that


now we can find the heat released


So it will release total heat of 55.5 kJ when it will solidify
Answer:
25N
Explanation:
formula=> Frictional force= coefficient of friction x normal reaction
normal reaction is mass x gravity(10N/kg)
so Frictional force= 0.5x5x10
=25N
but that is the Frictional force not the constant force
to get the constant force, subtract the Frictional force from the weight of the block
weight= mass x gravity
= 5x10
= 50N
50N-25N
=25N
Answer:
Explanation:
A wonderful (NOT) mixed unit problem
convert mph to m/s
v = 10 mi/hr(5280 ft/mi)(12 in/ft)(2.54 cm/in) / (100 cm/m) / (3600 s/hr)
v = 4.4704 m/s
KE = ½(0.006)4.4704²
KE = 0.05995342848 J
KE = 0.06 J