The answer is D. centripetal force
This definition of centripetal force is a force acting towards the center of an object moving in a circular motion. Acceleration is the rate of which velocity changes over a period of time. If you pick a point on say a rotating circle and find the tangential velocity at each point it goes through, the acceleration would be towards the middle.
Answer:
I = 27.65A < 40.59°
PowerFactor = 0.76
Explanation:
Current on the heating load is:
I1 = 30KW / 4KV = 7.5A < 0°
Current on the inductive load:
I2 = (150KVA*0.6) /4KV = 22.5A with an angle of acos(0.6)=53.1°
The sum of both currents is:
It = I1 + I2 = 7.5<0° + 22.5<53.1° = 27.65<40.59°
Now, the power factor will be:
pf = cos (40.59°) = 0.76
Battery
mobile phone
Explanation:
From the given options the items that are matter are the battery and mobile phone.
What is matter?
- Matter is anything that has weight and occupies space.
- There are three states of matter which are solid, liquid and gas
- A solid is a rigid body with an ordered arrangement of atom
- A liquid is matter that can flow
- Gases are random molecules.
A battery and mobile phones are solids
learn more:
State of matter brainly.com/question/10972073
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a. Wrong. EM waves can travel through matter OR vacuum.
b. True, but so can mechanical waves.
c. Wrong. Waves transfer energy, not matter.
d. This is it. EM waves can travel through empty space, and mechanical waves can't.
Answer:
The main effect of radiofrequency electromagnetic fields is heating of body tissues.
Explanation:
Image result for How do electromagnetic waves affect you?
At low frequencies, external electric and magnetic fields induce small circulating currents within the body. ... The main effect of radiofrequency electromagnetic fields is heating of body tissues. There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health.