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4 years ago

What does the heat shock step of the transformation procedure accomplish?

1 answer:

4 0

It loosens up the membrane structure. At high temperatures the lipids in the membranes become more fluid (think butter on a hot day) and this makes the entire membrane less stable. In turn, this is quite dangerous to the cell, which is why you need to return them to an ice bath immediately after the heat shock.

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A car of mass 960 kg is free-wheeling down an incline at a constant speed of 9.0 m s–1.

Orlov [11]

Need to draw it first.....
but there is no option here to draw .. why?
anyway , here the car is going with a uniform velocity..
so the acceleration of the car=0, a=0
so resistive force on the car=component along the inclined plane of the weight of the car=mg*cos(90-15)=960*9.8*cos 75=?

4 0

3 years ago

An emf is induced by rotating a 1060 turn, 20.0 cm diameter coil in the Earth's 5.25 ✕ 10−5 T magnetic field. What average emf (

lara31 [8.8K]

Answer:

The average emf induced in the coil is 175 mV

Explanation:

Given;

number of turns of the coil, N = 1060 turns

diameter of the coil, d = 20.0 cm = 0.2 m

magnitude of the magnetic field, B = 5.25 x 10⁻⁵ T

duration of change in field, t = 10 ms = 10 x 10⁻³ s

The average emf induced in the coil is given by;

$E = N\frac{\delta \phi}{dt} \\\\E = N\frac{\delta B}{\delta t}A$

where;

A is the area of the coil

A = πr²

r is the radius of the coil = 0.2 /2 = 0.1 m

A = π(0.1)² = 0.03142 m²

$E = \frac{NBA}{t} \\\\E = \frac{1060*5.25*10^{-5}*0.03142}{10*10^{-3}} \\\\E = 0.175 \ V\\\\E = 175 \ mV$

Therefore, the average emf induced in the coil is 175 mV

3 0

3 years ago

A feeling of worry or uneasiness, often triggered by an event with an uncertain outcome is defined as:

juin [17]

The answer is Anxiety. Hope this helps.

4 0

4 years ago

What is angle of dip

DENIUS [597]

<em>Angle of Dip is the angle in the vertical plane aligned with magnetic north (the magnetic meridian) between the local magnetic field and the horizontal.</em>

8 0

3 years ago

which obstacle to problem solving involves arriving at a solution based on your preconceptions and ignoring any evidence that go

White raven [17]

Answer:

confirmation bias

Explanation:

the tendency to interpret new evidence as confirmation of one's existing beliefs or theories in a way that affirms one's prior beliefs or hypotheses.

5 0

4 years ago