Answer: below
Explanation: Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume
Dont mind the top part, hope this helped
Answer:
(a) 220.46 Watt
Explanation:
m = 237 g
T1 = 20 degree C, T2 = 100 degree c , t = 6 minutes = 6 x 60 = 360 seconds
V = 120 V, c = 4186 J/kg C
(a)
Heat required to raise the temperature = m x c x (T2 - T1)
H = 0.237 x 4186 x (100 - 20)
H = 79366.56 Joule
Power = Heat / time = 79366.56 / 360 = 220.46 Watt
Answer:
Zero
Explanation:
According to Newton's second law, the net force acting on an object is equal to the product between the object's mass and its acceleration:
F = ma
For the hockey puck, there are no forces acting on it during its motion, since ice friction and air resistance are negligible. This means that the net force is zero:
F = 0
But this means that the acceleration is also zero:
a = 0
So the hockey puck is moving already at constant velocity. Therefore, there is no need for additional forces.
An electroscope is a device that detects static electricity by using thin metal or plastic leaves, which separate when charged. An object with a suspected static electric charge is brought near the metal plate or ball of the electroscope. Electrical charges move to the metal and down to the foil leaves, which then repel each other
Hope this helps! :D
