Answer with Explanation:
Kailangan nating sumunod sa batas dahil<em> ito'y para sa ating kapakanan at kaligtasan.</em> Ginawa ang batas <em>upang maging mapayapa ang ating pamayanan</em> kaya tungkulin nating sundin ito. Pinipigilan ng batas na abusuhin ang ating mga karapatan. Sinisiguro nito na <em>ligtas tayong maninirahan nang walang takot</em> at <em>patuloy nating itataguyod ang ating buhay nang walang inaapakang tao.</em> Dahil dito, nararapat lang na kilalanin ng tao ang batas at taos-pusong sundin ito.
Answer:
a) 30.84m/s
b) 348.32Hz
c) 32.34m/s
d) 289.69Hz
Explanation:
a) If 1 mile=1609,34m, and 1 hour=3600 seconds, then 69mph=69*1609.34m/3600s=30.84m/s
b) Based on Doppler effect:
/*I will take as positive direction the vector */
c)
d)
Answer:
11772 N
Explanation:
w= weight
m= mass
g= acceleration due to gravity
The acceleration due to gravity on earth is 9.81m/s².
Substitute m= 1200 and g= 9.81 into the formula:
w= 1200(9.81)
w= 11772 N
- mechanical energy is conserved in all the listed situations
- true
- potential energy
- 490 J
- 750,000 J
EXPLANATION
1. sum of kinetic energy (KE) and potential energy (PE) is known as mechanical energy
- kinetic energy is the motion of an object
- potential energy is the position of an object
there is kinetic energy and other energies in the listed situation.
2. since the height decreases due to the fall, the potential energy also decreases but the speed increases and kinetic energy simultaneously increases so the potential energy is converted to kinetic energy.
3.the energy consumed by an object due to its position is known as potential energy
4. potential energy
PE = m g h
m = 10 kg mass of the object
g = 9.8 m/s^2 acceleration of gravity
h= 5 m height of the object from ground
substituting every value in the formula
PE = (10)(9.8)(5)
PE= 490 J
5. potential energy
PE = m g h
but given is the weight and the height of the elevator
W= 1500 N
h= 500 m
but weight of the object is equal to the product of acceleration of gravity and mass of the elevator
so, W = mg
so we can rewrite the formula as PE = Wh
PE = (1500)(500)
PE= 750,000 J