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kvasek [131]
3 years ago
6

A particle falling at its terminal speed vterm is in dynamic equilibrium with no net force. Use Newton's second law for this par

ticle falling in the presence of a downward electric field of strength E, to find an expression for vterm.
Physics
1 answer:
Ilya [14]3 years ago
3 0
Es la A por que des dije ensslzvsnald. Xbsalbxhdjdjwsbdbd
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A 1500-W electric heater is plugged into the outlet of a 120-V circuit that has a 20-A circuit breaker. You plug an electric hai
Korolek [52]

Answer:

b) 900 W

Explanation:

The breaker trips when the current is equal to 20 A. The power (P) is the ddp (V) multiplied by the current. So, for the electric heater, the current is:

P = V*i

1500 = 120*i

i = 12.5 A

So, to become in 20 A, it's needed 7.5 A, which must come from the hairdryer. Its power must be:

P = 120*7.5

P = 900 W

8 0
3 years ago
9. How much work is done when a 15kg box is lifted to a height of 2 meters?
torisob [31]

Answer: W = 294 J

Explanation: Solution:

Work is expressed as the product of force and the distance of the object.

W = Fd        where F = mg

W= Fd

   = mg d

   = 15 kg ( 9.8 m/s²) ( 2m )

   = 294 J

5 0
3 years ago
You lift a 50 N object 2 meters off the ground what work did you do on the object
mixer [17]
Work equals force × displacement (distance between initial point and end point is displacement)
if u follow this it becomes
work = 50 × 2 which is equal to 100

comment if u have more questions
4 0
3 years ago
11. A sensitive thermometer is one which
Marta_Voda [28]

Answer:

A. ls sensitive to heat

this is correct answer

I hope it's helpful for you.......

4 0
3 years ago
A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. during this interval its acceleration is
Aliun [14]
The acceleration is 1
4 0
3 years ago
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