All categories

3 years ago

Which of the following statement about biofuels is NOT true?

Physics

1 answer:

Rzqust [24]3 years ago

8 0

Answer:

c. Cooking waste oil is not considered as a biofuel.

Explanation:

cooking waste oil known as waste vegetable oil is used in the production of biodiesel which is biofuel.the oils undergo trans-esterification process where the reaction produces biodiesel instead of the saphonification

You might be interested in

A square coil with a side length of 16.0 cm and 29 turns is positioned in a region with a horizontally directed, spatially unifo

tensa zangetsu [6.8K]

Answer:

$\epsilon_{max} = 0.774 \ V$

$wt = 0^o$

Explanation:

From the question we are told that

The length of the side is $l = 16.0 \ cm = 0.16 \ m$

The number of turns is $N = 29 \ turns$

The magnetic field is $B = 83.0 mT = 83 *10^{-3} \ T$

The angular speed is $w = 1.20 * 10^2 rev/min = \frac{1.20 *10^2 * 2\pi}{60 } = 12.6 \ rad/s$

Generally the area is $A = l^2$

Generally the induced emf is mathematically represented as

$\epsilon = N * w * B * A * cos(wt)$

At maximum $cos(wt) = 1$

$\epsilon_{max} = N * w * B * A$

$\epsilon_{max} = 29 * 12.6 * 83*10^{-3}* (l^2)$

=> $\epsilon_{max} = 29 * 12.6 * 83*10^{-3}* ((0.16)^2)$

=> $\epsilon_{max} = 0.774 \ V$

At maximum emf

$cos (wt) = 1$

=> $(wt) = cos^{-1} (1)$

=> $wt = 0^o$

6 0

3 years ago

The amplitude of a particular wave is 4.0 m. the top-to-bottom distance of the disturbance is

fenix001 [56]

The amplitude of a wave is the distance from the center of the wave to one of its peaks or one of its troughs. The distance from center to peak or center to trough is the same, therefore the top-to-bottom distance is simply twice the wave's amplitude, 8.0m

5 0

3 years ago

A boat on a river travels downstream between 2 points 20 miles apart in 1 hour. It makes its return trip against the current and

Tamiku [17]

There are two unknown quantities that we have to find. In order to work with them, we have to give them temporary names. Lets call the speed of the boat ' B ', and lets call the speed of the current ' C ' .

-- "Downstream", the current is helping the boat. The boat sails past the trees at a speed of (B + C).

(Distance) / (Speed) = Time

(20 miles) / (B + C) = 1 hour

Multiply each side by (B+C), then divide by 1 hr: 20 mi/1 hr = B + C

-- "Upstream" the boat is going against the current. It sails past the trees at a speed of (B - C).

(Distance) / (Speed) = Time

(20 miles) / (B - C) = 2.5 hours

Multiply each side by (B-C), then divide by 2.5 hr: 20 mi/2.5 hr = B - C

We're in good shape now. We have 2 equations in 2 unknowns:

Add the two equations, and you get 2B = 28. So B = 14 mph

Subtract the two equations and you get 2C = 12. So C = 6 mph

<em>The speed of the boat is 14 mph .</em>

<em>The speed of the current is 6 mph . </em>

4 0

4 years ago

Alice kicks a 0. 25 kg soccer ball with 0. 5 N of force. What force does the ball exert on Alice’s foot as she kicks it? N.

leva [86]

The force exerted on Alice’s foot as she kicks the ball is 1.25 N.Force can be defined as the influence that can accelerate the object.

<h3>What is force?</h3>

Force can be defined as the influence that can accelerate the object. From Newton's Second Law of motion,

$F = ma$