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4 years ago

George observed a difference in measurements for the same item at different altitudes due to variation in gravity.

2 answers:

8 0

George used the spring scale. For example: Using a spring scale on an elevator. As you go either up a floor or down a floor the gravity will change the outcome of the scale's measurements.

pashok25 [27]4 years ago

5 0

Answer:

B) Spring scale

Explanation:

As we the altitude changes the gravity's effect on body will change and it will affect the weight of the person too! Because,

$w = m \times g$

where, w = weight of the object

m = mass of the object

g = acceleration due to gravity

This difference will only be seen when you will use a spring scale as the object is directly being pulled by the Earth and the impact will only be in the object. Whereas, In other scales the impact of the change in gravity will be same on both measuring weight and the objects so the weight variation will not be seen.

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How does the gravitational force between two objects change if the distance

Anestetic [448]

Answer:

The Gravitational Force is reduced 4 times

Explanation:

The equation of Gravitational force follows:

F = (G*m1*m2)/r^2

Assume that G*m1*m2 = 1 and r = 1:

F = 1/1^2 = 1 N

Multiply the radius by 2

F = 1/2^2 = 1/4 N

So doubling the distance reduces the force 4 times.

7 0

3 years ago

An electromagnetic wave has a frequency of and is traveling in a vacuum. The magnetic field is given by ______.

Reptile [31]

Answer:

c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave

Explanation:

An electromagnetic wave carries energy that is given by the vector of poyntíng

S = 1 / μ₀ E x B

The electric and magnetic fields are related

E = c B

Substituting

S = c /μ₀ B² / 2

The two comes from the average value

Let's examine the claims

a) false to determine the wavelength the frequency is needed

b) False. To find the electric field you need the magnetic field

c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave

4 0

4 years ago

A circular coil of radius r = 5 cm and resistance R = 0.2 is placed in a uniform magnetic field perpendicular to the plane of th

Yuri [45]

Answer:

the question is incomplete, the complete question is

"A circular coil of radius r = 5 cm and resistance R = 0.2 ? is placed in a uniform magnetic field perpendicular to the plane of the coil. The magnitude of the field changes with time according to B = 0.5 e^-t T. What is the magnitude of the current induced in the coil at the time t = 2 s?"

2.6mA

Explanation:

we need to determine the emf induced in the coil and y applying ohm's law we determine the current induced.

using the formula be low,

$E=-\frac{d}{dt}(BACOS\alpha )\\$