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3 years ago

Why does the magnet rotate in an AC motor?

Physics

1 answer:

boyakko [2]3 years ago

8 0

Forces of gravity and magnets.

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Projectile's horizontal range on level ground is R=v20sin2θ/g. At what launch angle or angles will the projectile land at half o

seraphim [82]

Answer:

$\theta = 15^o \: or\: 75^o$

Explanation:

As we know that the formula of range is given as

$R = \frac{v^2sin2\theta}{g}$

now we know that

maximum value of the range of the projectile is given as

$R_{max} = \frac{v^2}{g}$

now we need to find such angles for which the range is half the maximum value

so we will have

$\frac{R}{2} = \frac{v^2}{2g} = \frac{v^2sin(2\theta)}{g}$

$sin(2\theta) = \frac{1}{2}$

$2\theta = 30 or 150$

$\theta = 15^o \: or\: 75^o$

7 0

3 years ago

The photo shows a pencil in water. As light passes from water into glass, it changes direction causing you to see a distorted vi

masha68 [24]

The answer is C. <span>Light travels at different speeds in water and in glass.</span>

7 0

3 years ago

Two balls are thrown from a cliff. One is thrown directly up, the other directly down. Both balls have the same initial speed, a

Otrada [13]

Answer:

both the same

Explanation:

When a ball is thrown vertically upwards, it experiences that same acceleration due to gravity as an object thrown directly downwards.

This means that if we ignore the effects of air resistance, and the two balls have the same initial speed, they are expected both expected to hit the ground at the same speed as a result of the principle of conservation of energy.

8 0

3 years ago

Predict what happens when glucose levels are high in the humms body

Goryan [66]

Glucose is blood sugar (hyperglycemia) comes from diabeties often, but can occur with other reasons, when glucose is to high someoenes sugar raises. Often this can lead to a diabetic coma, fatigue, vomiting, hospitalization, and even death if serious enough, from to high sugar. Many things can happen after this, and a lot are serious.

on the flip side (hypoglycemia) if sugar gets to low, confusion, fainting, vomiting, and nausea occur, as well as comas, and death if serious enought.

5 0

3 years ago

I push a box with mass 10 kg across a 15 m room. If I apply a force of 20N to do this how much work is being done on the box?

devlian [24]

You could use the formula

W=Fd

F(force)=20N

D(distance/displacement) =15m

W=(20N)(15m)

W= 300 J

8 0

3 years ago