How far will a force of 6 x 10^3N stretch a spring with spring constant 3 x 10^4 Nm-1 ?

Two bulbs marked 200 W-250 V and 100 W-250 V are joined in

lozanna [386]

Answer:

Explanation:

<u>Joule Heating</u>

It's the process by which the electric current passing through a conductor produces heat.

Also known as Joule's first law or the Joule–Lenz law, states that the power of heating generated by an electrical conductor (P) is proportional to the product of its resistance (R) and the square of the current (I).

It can be described by the equation that follows:

$P = I^2.R$

Also, we can calculate the voltage V with the formula of Ohm's law:

$V = I.R$

Combining both equations, power can be related to the voltage:

$\displaystyle P=\frac{V^2}{R}$

Given the power and the voltage, the resistance can be calculated by solving for R:

$\displaystyle R=\frac{V^2}{P}$

There are two bulbs marked P=200W V=250V and P=100 W V=250.

The first bulb has a resistance of:

$\displaystyle R_1=\frac{250^2}{200}$

$\displaystyle R_1=312.5\Omega$

The first bulb has a resistance of:

$\displaystyle R_2=\frac{250^2}{100}$

$\displaystyle R_1=625\Omega$

When connected in series, the total resistance is

$R = R_1 + R_2=312.5\Omega+625\Omega$

$R=937.5\Omega$

The total power consumed when connecting them to a V=250 V supply is:

$\displaystyle P=\frac{250^2}{937.5}$

P = 66.67 W

4 0

3 years ago

You throw a ball straight up. The ball has an initial speed of 11.2 m/s when it leaves your hand What is the maximum height the

Jet001 [13]

Answer:

Explanation:

Given

initial velocity $u=11.2\ m/s$

At maximum height velocity of ball is zero

using

$v^2-u^2=2as$

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

$(0)^2 -(11.2)^2=2\times (-9.8)\times (s)$

$s=\frac{11.2^2}{2\times 9.8}$

$s=6.4$

time taken by the ball to reach the maximum height

$v=u+at$

$0=11.2-9.8\times t$

$t=\frac{11.2}{9.8}$

$t=1.142\ s$

At $t=2\ s$ height of ball is

$h=ut+\\frac{1}{2}at^2$

$h=11.2\times 2-\frac{1}{2}9.8\times (2)^2$

$h=22.4-19.6$

$h=2.8\ m$

i.e. ball is moving downward

height at $v=5\ m/s$

$v^2-u^2=2as$

$s=\frac{25-125.4}{2\times (-9.8)}$

$s=5.12\ m$

8 0

3 years ago

The binding of acetylcholine to its receptor at the neuromuscular junction causes the opening of a

Rufina [12.5K]

Answer: opening of the nicotinic acetylcholine receptor channels.

Explanation:

Neuromuscular junction is a special junction formed between a motor neurone and a muscle fibre. The junction is fortified with nerves and receptors that helps in the transmission of signals from the motor neurone to the muscle fibre in order to bring about the desired voluntary movements through muscular contraction.

Nicotinic acetylcholine receptor are activated through the binding of acetylcholine at the neuromuscular junction. This action leads to influx of sodium ions to accomplish endplate potential.

7 0

3 years ago

1.

anastassius [24]

Answer:

from the formula of work done at any angle the formula is Force *distance cosα(tita)

7 0

3 years ago

A meteorologist swings a sling psychrometer and records the following readings: Dry-Bulb Temperature: 24°C Wet-Bulb Temperature:

ValentinkaMS [17]

Answer:

Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?Robert can complete 10 inspections in 8 hours. Which represents the unit rate for the number of inspections he completes per hour?

Explanation:

6 0

3 years ago