Ask question

Ask question

All categories

4 years ago

6

For the vectors in the figure, with a = 12, b = 9.0, and c = 15 what are (a) the magnitude and (b) the direction of a* b, (c) th

e magnitude and (d) the direction of a * c , and (e) the magnitude and (f) the direction b * c?

1 answer:

Levart [38]4 years ago

5 0

Your answer is c.=15 hope its what you was looking for!

You might be interested in

Find the velocity of an airplane traveling north at 100 kilometers per hour. It is also flying through a wind that is blowing we

artcher [175]

Answer:

Explanation:

Find the velocity of an airplane traveling north at 100 kilometers per hour. It is also flying through a wind that is blowing west at 30 kilometers per hour.

7 0

3 years ago

7 One lb of Refrigerant 134a contained within a piston–cylinder assembly undergoes a process from a state where the temperature

julsineya [31]

Answer:

$\Delta S = S_2-S_1 = 0.08835 \frac {BTU} {Lb ^ {\circ} R}$

Explanation:

A) In order to solve the table it is necessary to consult tables A11-E and A10E for refrigerant R134-a

In this way we obtain that:

$S_1 = S_f = 0.0648 \frac {BTU} {Lb. ^ {\circ} R}$

In this way,

$S_2 = S_f + x_2 (S_g-S_f) = 0.0902 + 0.5 (0.2161-0.0902)$

$S_2 = 0.15315 \frac {BTU} {Lb ^ {\circ} R}$

In this way the entropy change is,

$\Delta S = S_2-S_1 = 0.08835 \frac {BTU} {Lb. ^ {\°} R}$

B) Whenever entropy yields a positive result, the process can be carried out adiabatically.

7 0

3 years ago

Your student desk has been in the room for many hours, it is at thermal equilibrium with the room?

Svetllana [295]

Answer:

metal because A: In general, metals feel colder or hotter to the touch than other materials at the same temperature because they're good thermal conductors. This means they easily transfer heat to colder objects or absorb heat from warmer objects. Thermal insulators like plastic and wood don't transfer heat as easily.

Explanation:

4 0

3 years ago

A radioactive isotope has a half-life of 5,000 years. A rock originally contained 16 grams of radioactive isotope, and now conta

mixas84 [53]

Answer:

10,000 years

Explanation:

Given that,

Half life of the radioactive isotope, $t_{\frac{1}{2}}$ = 5000 years

Initial composition, $N_0$ = 16 grams

Final composition, $N$ = 4 grams

We know that,

$N=N_0\times (\dfrac{1}{2})^\frac{t}{t_\frac{1}{2}}}\\\\4=16(0.5)^\frac{t}{5000}}\\\\\dfrac{4}{16}=(0.5)^{\frac{t}{5000}}\\\\0.25=(0.5)^\frac{t}{5000}\\\\0.5^2=(0.5)^\frac{t}{5000}\\\\2=\dfrac{t}{5000}\\\\t=2\times 5000\\\\t=10000\ yrs$

Therefore, the age of the rock is 10,000 years.

6 0

3 years ago

Give one science fair experiment.

Harrizon [31]

I would do a windmill project!
Hope it helps!:)

5 0

3 years ago

Read 2 more answers