2 years ago

A teacher used a Geiger-Muller(GM)tube to measure the background radiation in her laboratory.

1 answer:

5 0

It changes because radiation always differs in the atmosphere because of the nuclear plants and of pollution around us. Even though it is indoors.

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What discoveries support the idea of continental drift?

noname [10]

Answer: With the discovery of plate tectonics and the mapping of the earth into about 12 plates, plus the understanding that plates' movement caused earthquakes, Alfred Wegener's idea of " continental drift" looked less ludicrous than his contemporaries had thought.

Explanation: Hope this works :)! If not, I am sorry :(. If it does, Your Welcome! :)

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2 years ago

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If the roller coaster car in the above problem were moving with twice the speed(20m/s), then what would be its new kinetic energ

Diano4ka-milaya [45]

Answer:

KE = 1.05 x105 Joules

Explanation:

KE = 4 * (1.04653 x 105 J) = 4.19 x 105 Joules.

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2 years ago

Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). (a) W

bija089 [108]

Answer:

1411.8 N/m

Explanation:

From Hooke's law;

F= Ke

Where

F= force on the spring

K= force constant

e = extension

But e= 8.50 × 10^-2m

F= weight = 12.0 kg × 10 = 120 N

K = F/e = 120/8.50 × 10^-2

K= 1411.8 N/m

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2 years ago

When the palmaris longus muscle in the forearm is flexed, the wrist moves back and forth. If the muscle generates a force of 43.

zmey [24]

To solve this problem, we must take two important steps. First we will convert all the given units, to international system. Later we will define the torque, which is given as the product between the radius of application of the force and the Force acting on the body. Mathematically the latter is,

$\tau = r F$