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3 years ago

6

The actions of an employee are not attributable to the employer if the employer has not directly or indirectly encouraged the em

ployee to violate a law and if:

1 answer:

zepelin [54]3 years ago

4 0

Answer: the answer is d

Explanation: there are not more than 10 violations within a twelve month period hope this helps

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A hot (70°C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g⋅°C. John drops the metal into a 500-g calorimet

Gnom [1K]

Answer:

d. 37 °C

Explanation:

$m_{m}$ = mass of lump of metal = 250 g

$c_{m}$ = specific heat of lump of metal = 0.25 cal/g°C

$T_{mi}$ = Initial temperature of lump of metal = 70 °C

$m_{w}$ = mass of water = 75 g

$c_{w}$ = specific heat of water = 1 cal/g°C

$T_{wi}$ = Initial temperature of water = 20 °C

$m_{c}$ = mass of calorimeter = 500 g

$c_{c}$ = specific heat of calorimeter = 0.10 cal/g°C

$T_{ci}$ = Initial temperature of calorimeter = 20 °C

$T_{f}$ = Final equilibrium temperature

Using conservation of heat

Heat lost by lump of metal = heat gained by water + heat gained by calorimeter

$m_{m} c_{m} (T_{mi} - T_{f}) = m_{w} c_{w} (T_{f} - T_{wi}) + m_{c} c_{c} (T_{f} - T_{ci}) \\(250) (0.25) (70 - T_{f} ) = (75) (1) (T_{f} - 20) + (500) (0.10) (T_{f} - 20)\\T_{f} = 37 C$

6 0

3 years ago

A rock falls 15 m. is this vertical or horizontal motion? what is the displacement?

Irina-Kira [14]

Displacement will be 15 too because
It falls from 0 till 15 meters

4 0

3 years ago

At the top of a looped section of roller coaster track, the car and rider are completely upside down. Engineers calculated that

Pie

Answer:

m v^2 / R = m g where gravitational force provides centripetal force

R = v^2 / g = 14.3^2 m/s / 9.8 m/s^2 = 20.9 m

7 0

3 years ago

A ball is dropped from rest from a high window of a tall building and falls for 4 seconds. Neglecting air resistance, the final

Semenov [28]

Answer:

The final velocity of the ball is 39.2 m/s.

Explanation:

Given that,

A ball is dropped from rest from a high window of a tall building.

Time = 4 sec

We need to calculate the final velocity of the ball

Using equation if motion

$v=u+gt$

Where, v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time

Put the value into the formula

$v=0+9.8\times4$

$v=39.2\ m/s$

Hence, The final velocity of the ball is 39.2 m/s.

6 0

3 years ago

If John mows 11.5 meters of lawn from east

Oksanka [162]

I believe it would be 1.6 East

8 0

3 years ago