Calculus
The derivative of (x^3 + 2x^2 + 5x) =?
3x^2 + 4x + 5
log2(16) AND log4(64)
不能用计算器，不然0分
left > right
If energy cannot be created or destroyed, where does the energy go when friction slows down a moving object?
Heat
图片11
A
the derivative of e^x =?
e^x
图片 1
（不能用计算器，不然0分）
left > right
A light bulb of resistance 1000 ohms is connected to a power supply of 200 volts, calculate the power.
40 W
图片13
C
the derivative of arctan(x)=?
1/(1+x^2)
图片2
（不能用计算器，不然0分）
left equals right
An apple is released at rest 5 meters above the ground. Calculate its speed just before it hits the ground. Treat g = 10 m/s^2.
10m/s
图片15
B
Integral of e^(-x)
-e^(-x) + C
图片3
（不能用计算器，不然0分）
136>24
left > right
Why does the pitch of an ambulance siren sound higher as it approaches you and lower as it moves away?
Doppler Effect
图片17
A
图片7
（不加C也算对）
求出算式的值【图片9】
(不能用计算器)
D
A person of mass 80 kg stands in a lift accelerating upward at a rate of 2m/s^2.(treat g=10m/s^2)
Calculate the force the lift floor exerts on the person.
F = mg + ma = 960N
图片18
D