7. The S.l. unit for force is A. kg C. m/s B. m/s2 D. N

A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising th

erik [133]

Answer:

$P = 36068.7 Watt$

Explanation:

As we know that average power is the ratio of total work done and total time interval

so we will have

$Power = \frac{Total \: Work}{time}$

now we know that

$Work = \frac{1}{2}mv^2 + mgh$

$W = \frac{1}{2}(700)(11^2) + 700(9.8)(9.6)$

so we will have

$W = 42350 J + 68856 J$

$W = 108206 J$

now power is given as

$P = \frac{108206}{3}$

$P = 36068.7 Watt$

6 0

3 years ago

Two fish swimming in a river have the following equations of motion:

IRINA_888 [86]

Answer:

The second fish, X2, is moving faster than the first fish, X1

Explanation:

The given parameters for the equation of motion of the fishes are;

X1 = -6.4 m + (-1.2 m/s)×t

X2 = 1.3 m + (-2.7 m/s)×t

The given equation are straight line equations in the slope and intercept form, where the slope is the speed and in m/s and the intercept is the starting point of swimming of the fishes

For the first fish, the intercept = -6.4 m, the slope = the speed = -1.2 m/s

For the second fish, the intercept = 1.3 m, the slope = the speed = -2.7 m/s

Whereby the fishes are swimming in the opposite direction of the measurement of length, we have;

The magnitude of the speed of the second fish $\left | -2.7 \ m/s \right | = 2.7 \ m/s$ , is larger than the magnitude of the speed of the first fish $\left | -1.2 \ m/s \right | = 1.2 \ m/s$

Therefore, the second fish, X2, is moving faster than the first fish, X1.

8 0

3 years ago

You can make a solute dissolve more quickly in a solvent by

Gekata [30.6K]

Answer:Stirring.

Explanation:Stirring a solute into a solvent speeds up the rate of dissolving because it helps distribute the solute particles throughout the solvent. For example, when you add sugar to iced tea and then stir the tea, the sugar will dissolve faster.

3 0

3 years ago

Can you guys finish the quote?

shusha [124]

Answer:

By using moving shaft and coiled wire together, electric generators create electricity. Electric generators essentially convert kinetic energy (the energy of motion) into electric energy.

Explanation:

hope this helped

7 0

3 years ago

n astronaut who weighs 800 N on the surface of the earth lifts off from planet Zuton in a space ship. The free-fall acceleration

ANTONII [103]

Answer: 0.29 kN

Explanation:

We have the following data:

$W_{E}=800 N$ is the weight of the astronaut on Earth