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3 years ago

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0. The temperature of source is 500K with source energy 2003, what is the temperature of sink with sink energy 100 J? a. 500 K b

. 300 K c. 250 K d. 125 K

1 answer:

andreev551 [17]3 years ago

4 0

Answer:

c. 250k

Explanation:

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Select the correct answer. Your target heart rate is between 60% and 80 % of your maximum heart rate. A. True B. False

Katen [24]

A. true
your target heart rate is between 64% and 76% of your maximum heart rate

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3 years ago

What is the acceleration of a proton moving with a speed of 7.0 m/s at right angles to a magnetic field of 1.7 t ?

Ivenika [448]

We know that a charge moving in a magnetic field is subject to the force:
F = q · v · B

But we also know that:
F = m · a

Therefore, it must be:
m · a = <span>q · v · B

And solving for a:
</span>a = <span>q · v · B / m

Recall that for a proton:
q = 1.6</span>×10⁻¹⁹ C
m = 1.673×10⁻²⁷ kg

Now, you can find:
a = 1.6×10⁻¹⁹ · 7.0 · 1.7 / <span>1.673×10⁻²⁷
= 1.14</span>×10⁹ m/s²

Hence, the acceleration of the proton is 1.14<span>×10⁹ m/s²</span>.

8 0

3 years ago

An object is placed a distance of twice the focal length away from a diverging lens. What is the magnification of the image?

Bas_tet [7]

Answer:

1/3

Explanation:

We can solve the problem by using the lens equation:

$\frac{1}{f}=\frac{1}{p}+\frac{1}{q}$

where

f is the focal length

p is the distance of the object from the lens

q is the distance of the image from the lens

Here we have a divering lens, so the focal length must be taken as negative (-f). Moreover, we know that the object is placed at a distance of twice the focal length, so

$p=2f$

So we can find q from the equation:

$\frac{1}{q}=\frac{1}{(-f)}-\frac{1}{p}=-\frac{1}{f}-\frac{1}{2f}=-\frac{3}{2f}\\q=-\frac{2}{3}f$

Now we can find the magnification of the image, given by:

$M=-\frac{q}{p}=-\frac{-\frac{2}{3}f}{2f}=\frac{1}{3}$

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4 years ago

How much current will flow through your body if the resistance between your hands is 30,000 ohms and you are connected to 120 vo

Law Incorporation [45]

Resistance of our body is given as

$R = 30,000 ohm$

voltage applied across the body is

$V = 120 V$

now by ohm's law current pass through our body is given by

$i = \frac{V}{R}$

$i = \frac{120}{30,000}[\tex][tex]i = 4 * 10^{-3} A$

So current from our body will be 4 * 10^-3 A

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4 years ago

A 1,500 kg roller coaster is traveling at 32 m/s as it goes over a 6 meter tall hill. What is the kinetic energy of the roller c

malfutka [58]

Answer:

768000 joule

Explanation:

As we know that

K.E = 0.5 x mv2

Here m stands for mass, the measure of how much matter is in an object, and v stands for the velocity of the object, or the rate at which the object changes its position.

putting the value we get

K.E = 0.5 x (1500KG)(32 m/s)2

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6 0

4 years ago