Explain the relationship between schemas and stereotypes

Please help me with thus question (picture) D:

IrinaVladis [17]

well thanks for the Information

4 0

3 years ago

An electric motor is used to run an elevator. The total mass of the elevator car and passenger is 1600 kg. The elevator moves up

Masja [62]

Answer:

Approximately $2.7 \times 10^{4}\; {\rm W}$ , assuming that $g = 9.81\; {\rm m\cdot s^{-2}}$

Explanation:

The weight of the elevator is:

$\begin{aligned}& \text{weight} \\ =\; & m\, g \\ =\; & 1600\; {\rm kg} \times 9.81\; {\rm m \cdot s^{-2}} \\ \approx\; & 15700\; {\rm N}\end{aligned}$ .

Since the speed of the elevator is constant, the acceleration of this elevator would be $0$ .

By Newton's Second Law of Motion, the net force on the elevator (proportional to acceleration) would also be $0\!$ . All external forces on the elevator need to be balanced in every direction.

The only two vertical forces on the elevator are:

the weight of the elevator (downward gravitational pull from the earth,) and
the upward pull from the motor.

These two forces need to balance one another. Since the weight of the elevator is approximately $15700\; {\rm N}$ , the upward pull of the motor would be $15700\; {\rm N}\!$ . in magnitude.

The direction of this upward pull is the same as the direction of the motion of this elevator. Thus, the work that the motor did on the elevator would be positive:

$\begin{aligned}& \text{work} \\ =\; & F\, s \\ \approx\; & 15700\; {\rm N} \times 15.0\; {\rm m} \\ \approx\; & 2.35 \times 10^{5}\; {\rm J}\end{aligned}$ .

Since the velocity of the elevator is constant, instantaneous power output of the motor would be equal to the average power of the motor:

$\begin{aligned}& \text{power} \\ =\; & \frac{\text{work}}{t} \\ \approx\; & \frac{2.35 \times 10^{5}\; {\rm J}}{8.82\; {\rm s}} \\ \approx\; & 2.7 \times 10^{4}\end{aligned}$ .

4 0

3 years ago

IN WHAT CONDITION DO SOUND ECHO

DerKrebs [107]

Answer:

The conditions necessary for hearing the echo. The distance between the sound source and the reflecting surface must not be less than 17 metres where the time period between hearing the original sound and its echo should not be less than 0.1 of a second.

6 0

3 years ago

One molecule of glucose makes 30 molecules of atp. how many molecules of glucose are needed to make 300 molecules of atp in aero

leonid [27]

10 molecules are required

8 0

4 years ago

Read 2 more answers

If a small motor does 520 J of work to move a toy car 260 m in 3.0 seconds, how much power is being applied by the motor?

Lubov Fominskaja [6]

Answer:

P = 173.33 [W]

Explanation:

Power is defined as the amount of work done over a given time.

W = work = 520 [J]

t = time = 3 [s]

P = power [w]

Therefore by working relationship over time we can calculate the power.

$P =W/t\\P = 520/3\\P=173.33[W]$

4 0

3 years ago