Use the formula E=mc^2
energy given=<span>8.1 x 10^16 joules
</span>speed of <span>light = 3.00 × 10^8 m/s
</span>
plug in the values we'll get mass=<span>9.0 x 10-1 kg</span>
Answer:
Either
8.2
×
10
5
is already in standard notation
or you want
820
,
000
Explanation:
"Standard notation" is often used as a synonym for scientific nation, in which case the given format is already in standard notation.
However, some people use "standard notation" for what we might think of as "common form"
To convert from scientific notation to common form move the decimal point in the mantissa (in this case
8.2
) to the right the number of places indicated by
10
's exponent (in this case 5). [If the exponent is negative the decimal point will be moved to the left].
Answer:
Height z= 2.115 cm
Explanation:
The formula for area of a trapezoid is ;
A=1/2(a+b)h where A is area, a and b are the lengths of parallel sides and h is the height of the trapezoid.
Given in the question;
A= 20 cm²
a=( 2z + 3 ) cm
b= (6z-1) cm
h= z =? unknown
Substitute in the formula as;
A=1/2(a+b)h
20=1/2(2z+3+6z-1)z -----------multiply both sides of the equation by 2
40= (2z+3+6z-1)z -----------collect like terms as
40 =(2z+6z+3-1)z
40=(8z+2)z -----open brackets as
40=8z²+2z --------- form a quadratic equation
8z²+2z-40 = 0 -----solve the quadratic equation to find value of z
z²+0.25z-5=0
z= 2.115
Answer:
1) 1 N2 + 3 H2 2 NH3
2) 2 KClO3 2 KCl + 3 O2
Explanation:
That would help!! Stay safe