A sound wave can not value in a vacuum, so its speed is 0.
Sound waves are longitudinal and require a medium to pass through.
Answer: 960 W
Explanation:
Power is the rate at which energy is dispensed. Electrical power can be defined as the rate at which electric energy is flowing in an electric circuit. It is given by the formula:
P = V I
Where, V is the voltage(V) , I is the current (A).
V = 240 V (given)
I = 4 A (given)
P = VI = 960 Watts
Hence, power used by the cloth dryer is 960 W.
Answer:
Magnetic domains
Explanation:
Because when the electrons spin around the necleus of an atom, it causes the atom to become a tiny magnet
Answer:
v = 5.6 m/s
Explanation:
Given,
The mass of the car, m = 1500 kg
The kinetic energy of the car, K.E = 23,500 J
The kinetic energy of the of an object is given by the relation,
K.E = ½ mv²
Substituting the given values in the equation,
23,500 = ½ x 1500 x v²
v² = 23500/ 750
= 31.33
v = 5.6 m/s
Hence, the K.E of the car is, v = 5.6 m/s
