Answer:
- 278.4°F
Step-by-step explanation:
Temperature of Object ( T ) = 1200° F
Temperature of surrounding ( M ) = 80°F
Time ( t ) = 1 hour
dT / dt ∝ ( M - T )
dT /dt ∝ | ( 80 - 1200 ) |
dT / dt = k ( 1120 )
(1200 - 830 ) / 1 = k ( 1120 )
hence k = ( 1200 - 830 ) / 1120
= 370 / 1120 = 0.33
<u>what is the object's temperature (x )after 4 hours </u>
( 1200 - x ) / 4 = 0.33 ( 1120 )
( 1200 - x ) / 4 = 369.6
hence x = 1200 - ( 4 * 369.6 )
= - 278.4 ° F
Answer:
the third one on the first picture it skips 18 and messes up the +1
Answer:
78
Step-by-step explanation:
1. Find the values at 2 and 5: 3^2 = 9 3^5 = 243
2. Subtract to find the difference 243-9 = 234
3. Divide by the interval : 234/(5-2) = 78
Answer:
55
Step-by-step explanation:
Tamara's forearm is given to be 0.366 meters in length, so that a force of 155 newtons is being applied at this distance from her elbow. Again, this force is applied at an angle of 15 degrees, so that the positioning should be the following -
r = ( 0.366( cos 15 ), 0, 0.366( sin 15 ) ),
r = ( 0.35352885242, 0, - 0.0947277705 ) - ( Approximately )
Now the force is applied in the vertical direction, so -
F = ( 0, 0, 155 )
_________________________________________________
We can now multiply the two ( ( 0.35352885242, 0, - 0.0947277705 ) and ( 0, 0, 155 ) ), performing the following calculation to receive " j " the magnitude,
<u><em>And as you can see, j / magnitude is about 54.8</em></u>
Velocity of the car is equal to the distance travelled by the time spent.
If V= velocity, d = distance & time = t, then
the equation becomes V=d/t