Numbers Flashcards
What are the units of impulse? (derived unit and derivation)
N*s = kg(m/s)
What are the units of impulse? (derived unit and derivation)
N*s = kg(m/s)
cos(0)=?
1=(4/4)1/2=1
What is the specific heat of water?
1 c/(gram°C)=4.186 J/(gram°C)
cos(60)=?
0.5=(1/4)1/2
What is the relationship among the different units for heat?
1 Cal = 103 cal = 3.97 Btu = 4184J
log(15)=?
1.17
log(100)=?
2
cos(90)=?
0=(0/4)1/2
cos(45)=?
0.7=(1/2)1/2=(2/4)1/2
log( e )=?
log(2)=log(2.72)=0.43
What are the units of force? (derived unit and derivation)
N = kg(m/s2)
sin(45)=?
0.7=(1/2)1/2=(2/4)1/2
sin(60)=?
0.86=(31/2)/2=(3/4)1/2
log(10)=?
1
What are the units of pressure? (derived unit, derivation, and conversion)
pascal (Pa = N/m2 = kg/(ms2)
1 atm = 760 mmHg = 760 Torr = 105 Pa (N/m2)
What are the units of kinetic energy (derived unit and derivation)
J = N*m = kgm2/s2
What is log in relation to an exponent?
- A logarithm is simply the inverse of an exponent. That is, if 10A = B, then log10B = A.
- A numerical example would be that 102 = 100, so log10(100) = 2. Unless otherwise indicated, it can be assumed that “log” means log base 10. Some log values to be familiar with are log(0.01) = -2, log(0.1) = -1, log(1) = 0, log(3) ≈ 0.5, log(10) = 1, and log(100) = 2, from which you can predict log values for larger powers of 10.
sin(30)=?
0.5=(1/4)1/2
log(1)=?
0
What is the relationship between log and ln?
2.3 × log10(N) = ln(N)
sin(90)=?
1=(4/4)1/2=1
cos(30)=?
0.86=(31/2)/2=(3/4)1/2
sin(0)=?
0=(0/4)1/2
