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3 years ago

A certain battery can power a 100 ohm-resistance device for 4 hours. how long can the battery power a 200 ohm device?

1 answer:

3 0

Too easy:

100Ω/4 sec = 200Ω/t

t= 8 sec

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Carbohydrates are made of hydrogen, oxygen, and which of the following? A. nitrogen B. carbon C. helium D.argon

k0ka [10]

The answer would be carbon

4 0

3 years ago

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical

Vadim26 [7]

Answer:

2 1 1

Explanation:

8 0

3 years ago

A pendulum bob executing simple harmonic motion has 2cm and 12Hz as amplitude and frequency respectively. Calculate the period o

Jobisdone [24]

Answer:

Explanation:

The amplitude is extraneous information for this question.

Period (T) is simply a measure of time (how long it takes to complete a full cycle).

The frequency (f), is the reciprocal (how many cycles it can complete per unit of time).

The frequency reported is 12Hz. Hz is a unit meaning "cycles per second"

Thus 12cycles = 1second.

To find the number of seconds per cycle, simply create the other unit fraction and simplify:

$T=\frac{1second}{12cycles}\\T=0.8\bar{3}\frac{seconds}{cycle}\\$

$T=0.83seconds$

7 0

2 years ago

A factory worker pushes a 32.0 kg crate a distance of 7.0 m along a level floor at constant velocity by pushing horizontally on

g100num [7]

Answer:

(a) 81.54 N

(b) 570.75 J

(d) 0 J, 0 J

(e) 0 J

Explanation:

mass of crate, m = 32 kg

distance, s = 7 m

coefficient of friction = 0.26

(a) As it is moving with constant velocity so the force applied is equal to the friction force.

F = 0.26 x m x g = 0.26 x 32 x 9.8 = 81.54 N

(b) The work done on the crate

W = F x s = 81.54 x 7 = 570.75 J

W' = - W = - 570.75 J

(d) Work done by the normal force

W'' = m g cos 90 = 0 J

Work done by the gravity

Wg = m g cos 90 = 0 J

(e) The total work done is

Wnet = W + W' + W'' + Wg = 570.75 - 570.75 + 0 = 0 J

6 0

3 years ago

What do you call the material or "stuff" that a wave travels through

frutty [35]

C I think if not it’s B

8 0

2 years ago

Read 2 more answers