Answer:
Vo = 4.5 [m/s]
Explanation:
In order to solve this problem, we must use the following equation of kinematics.
![v_{f}=v_{o}+a*t](https://tex.z-dn.net/?f=v_%7Bf%7D%3Dv_%7Bo%7D%2Ba%2At)
where:
Vf = final velocity = 12 [m/s]
Vo = initial velocity [m/s]
a = acceleration = 1.5 [m/s²]
t = time = 5 [s]
Now replacing:
![12=v_{o}+1.5*5\\v_{o}=12- (7.5)\\v_{o}= 4.5[m/s]](https://tex.z-dn.net/?f=12%3Dv_%7Bo%7D%2B1.5%2A5%5C%5Cv_%7Bo%7D%3D12-%20%287.5%29%5C%5Cv_%7Bo%7D%3D%204.5%5Bm%2Fs%5D)
Answer:I think its the first one
Explanation:
Answer:
Explanation:
given,
![\vec{A} = 4 \hat{i} + 7 \hat{j}](https://tex.z-dn.net/?f=%5Cvec%7BA%7D%20%3D%204%20%5Chat%7Bi%7D%20%2B%207%20%5Chat%7Bj%7D)
![\vec{B} = 5 \hat{i} - 2 \hat{j}](https://tex.z-dn.net/?f=%5Cvec%7BB%7D%20%3D%205%20%5Chat%7Bi%7D%20-%202%20%5Chat%7Bj%7D)
vector product ![\vec{A} \times \vec{B} = ?](https://tex.z-dn.net/?f=%20%5Cvec%7BA%7D%20%5Ctimes%20%5Cvec%7BB%7D%20%3D%20%3F)
= ![\begin{bmatrix}i & j & k\\ 4 & 7 &0 \\ 5 & -2 & 0\end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7Di%20%26%20j%20%26%20k%5C%5C%204%20%26%207%20%260%20%5C%5C%205%20%26%20-2%20%26%200%5Cend%7Bbmatrix%7D)
now, expanding the vector
the vector product is equal to
Answer:
Monthly cost = 35.7
Explanation:
Given the following data;
Power = 7000 Watts
Time = 10 minutes
Number of days = 30 days
Conversion:
60 minutes = 1 hour
10 minutes = 10/60 = 0.17 hours
To find the monthly cost of electricity;
Energy = power * time
Energy consumption = 7000 * 0.17
Energy consumption = 1190 Watt-hour = 1.19 KWh (1 Kilowatts is equal to 1000 watts).
Next, to find cost of monthly energy consumption;
Cost = 1.19 * 30
Cost = 35.7