Answer:
108,000 joules
Step-by-step explanation:
Kinetic energy, k = 1/2 mv^2
Where,
m = mass of the object in kilogram
v = velocity in meters per seconds
If
Velocity of an object = 20 meters per seconds
Kinetic energy = 48,000 joules
Solve for m
k = 1/2 mv^2
48,000 = 1/2 × m × 20^2
48,000 = 1/2 × m × 400
48,000 = 200m
m = 48,000 / 200
m = 240 kg
If it speeds up to 30 meters per second, then what is its new kinetic energy?
k = 1/2 mv^2
Using m = 240 kg
k = 1/2 mv^2
= 1/2 × 240 × 30^2
= 1/2 × 240 × 900
= 216,000 / 2
= 108,000 joules
The new kinetic energy = 108,000 joules
The single line marks indicate the two lines have the same length. Thus, the unknown length is 3 cm. 15 mm = 1.5 cm, 25 mm = 2.5 cm. The rest is trivial.
Answer:
24 cupcakes
Step-by-step explanation:
Jamir is making cupcakes for the potluck. Each cupcake requires 3/4 cups of batter. How many cupcakes can he make?
In the question, we are not given the number of cups batter for a potluck. So we can assume
1 potluck = 18 cups of batter
3/4 cups of batter = 1 cup cakes
18 cups of batter = x cup cakes
Cross Multiply
3/4 × x = 18 × 1
x = 18 ÷ 3/4
x = 18 × 4/3
x = 24 cup cakes
Answer:
D
Step-by-step explanation:
35:100
/5. /5
7:20
and you cant simply anymore
Hello!
The expression that represents Alisha's age is D. 2p - 3
Explanation:
An expression is a "mathematical phrase" and expression D. is simply saying that if you mutliply Paula's age by 2 and subtract 3 from that, you will get Alisha's age, which is why this expression is correct!
