Newton's Third Law of Motion is often called the law of intertia.

True
False

Answers

Answer 1

Answer: This is False. Newton's First Law of Motion is often called the law of inertia.

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Number 33 apparently the answer is 4 but I have no idea why

Answers

It would help if you managed to capture the whole question and all the answer choices
in the picture. Fortunately, you caught the whole question in the picture of #32.

Tools you need in order to answer this one:
-- When the frequency of a wave goes up, the wavelength gets shorter.
(That's why the high numbers on a radio receiver are called 'short-wave'.)
-- Photons with higher frequency carry more energy.
(That's why x-rays and gamma rays are dangerous to our delicate human tissues.)

Do you remember hearing these things in class ?

Anyway, as the frequency of the photons increases, their
energy increases, and their wavelengths get shorter.

I hope that's one of the choices that escaped getting caught in the photo.

A 3.7 kg object is lifted to a Hight of 3 meters what is the potential energy of this object

Answers

Gravitational potential energy = (mass) x (gravity) x (height)

PE = (3.7) x (9.81) x (3)
= 108.89 kilogram-meters²/second
= 108.89 newton-meters
= 108.89 joules

What is the use if having a control condition in an investigation

Answers

Answer:

Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.

Explanation:

An unbalanced force of 40. newtons keeps a5.0-kilogram object traveling in a circle of radius
2.0 meters. What is the speed of the object?
(1) 8.0 m/s (3) 16 m/s
(2) 2.0 m/s (4) 4.0 m/s

Answers

This can be answered using the formula of centripetal force. In the given problem, the centripetal force (40 N), mass (5 kg), radius (2 m) are all named, except for the speed. The formula is shown below:

F = mv^2 / r

Substituting the given values:

40 N = 5kg(v^2) / 2
80 = 5 * v^2
v^2 = 16
v = 4

Therefore, the correct answer is 4.0 m/s (4).

A biconvex lens is one in which both surfaces of the lens bulge outwards. Suppose you had a biconvex lens with radii of curvature with magnitudes of R 1= 10cm and R 2 = 15cm. The lens is made of glass with index of refraction n=1.5. We will employ the convention that R 1 refers to the radius of curvature through wich light will enter the lens, and R 2 refers to the radius of curvature from which the light will exit the lens.Is this lens converging or diverging?

What is the focal length of this lens in air?

Answers

Answer:

The focal length is 12 cm and the lens is converging.

Explanation:

Given that,

Radius, R ₁=10 cm

R₂ =15 cm

Index of refraction n= 1.5

We need to calculate the focal length of the lens

Using formula of focal length

$(1)/(f)=(n-1)((1)/(R_(1))+(1)/(R_(2)))$

Put the value into the formula

$(1)/(f)=(1.5-1)((1)/(10)+(1)/(15))$

$(1)/(f)=0.0833$

$f =12\ cm$

The focal length of the lens is positive so the lens is converging.

Hence, The focal length is 12 cm and the lens is converging.

Final answer:

A biconvex lens is a type of converging lens. Using the Lensmaker's formula and the given values, the focal length of the lens in air is calculated to be 30cm.

Explanation:

A biconvex lens, which is defined by both surfaces of the lens bulging outwards, is a form of converging lens due to its ability to bend parallel light rays toward a single focal point after they pass through the lens. The focal length of the lens can be calculated using the Lensmaker's formula, which is 1/f = (n-1)[(1/R1) - (1/R2)]. Applying the given values, we find that the focal length f = 1/[(1.5-1)[(1/10)-(1/15)]] = 30cm.

Therefore, this biconvex lens is a converging lens with a focal length of 30cm in air.