Answer:
Birds don't fall down when they fly because their wings build lift when they flap them. Clouds don't fall down because the water particles that they keep are spread out for miles, so gravity has little effect on them.
Heat required = mass (g)*specific heat (c)* Temperature change (ΔT)
Given,
mass = 150 g, specific heat = 4.187 J/g.K, ΔT = -15 -(-30 = -15+30 = 15 K
Therefore,
Heat, H = 150*4.187*15 = 9420.75 J
Answer:
independent of the projectiles mass
Explanation:
the range only depends on velocity of projection,angle of projection,acceleration due to gravity.
Answer:
a. C or E.. Cyclic
b. A
Explanation:
A. Using the right hand rule... I the thumb is the current direction, and the other fingers coil to rep the magnetic field direction.
B. Two parallel wires carrying the same current but in opposing direction repels..
Yes. Electrostatics are known to include the conductivity of metals whenever they start to have electrical flows on them. It's always been there on the list, and one notable instance of it is the flow of electricity in a wire.
