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borishaifa [10]

3 years ago

11

Which of the following forms of radiation can be shielded by earths atmosphere? Gamma rays,radio waves,visible light, all of the

above A. Rob.

1 answer:

sesenic [268]3 years ago

8 0

Gamma rays are mostly absorbed. So its probably

Gamma Rays

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Question 8 of 10

Marrrta [24]

Answer:

C

Explanation:

If the theory were to be proved you you need to repeat the experiment over and over again so that way you can prove that it is true wuth the same results.

3 0

3 years ago

Read 2 more answers

A massless, rigid board is placed across two bathroom scales that are separated by a distance of 1.71 m. A person lies on the bo

Nata [24]

Answer:

Let the weight of the person be W and be located at a distance 'a' from the left scale as shown in the figure

Since the body is in equilibrium we can use equations of statics to analyse the problem.

Taking Sum of Moments about A we have

$316\times 1.71-W\times a=0\\\\$

Taking Sum of Moments about B we have

$475\times 1.71-W\times (1.71-a)=0\\\\$

Solving the above 2 equations for W and 'a' we get

$316\times 1.71=W\times a\\\\475\times 1.71-W\times 1.71=-Wa\\\\\therefore W=\frac{316+475}{1}=791N\\\\\therefore a=\frac{316\times 1.71}{791}=0.683m$

8 0

3 years ago

A bus hits a bug and the bug splatters on the windshield, which force is greater?

grandymaker [24]

The forces acting on a body and the type of motion that results are given by Newton's three Laws of motion

The <u>force </u>of the bus is <u>the same</u> as reactive force of the bug

Reason:

According to Newton's third Law of motion, given that the bug collides

with the bus, the force with which the bus hits the bug is equal to the

reactive force of the bug on the on the bus

According to Newton's second Law of motion, force is equal to the rate of

change of the momentum produced

The impulse of the force of the bus on the bug is given as follows;

F·Δt = m·(v₂ - v₁)

Given that the force of the bus is large, the change in momentum, m·(v₂ - v₁),

is also large such that the parts of the bug are split by the rapid change in

velocity, and the bug splatters on the windshield, and is then carried along

on the trip,

The equally large reactive force of the bug, is such that the bug splatters

due its magnitude

Therefore, the correct response is that <u>the forces are the same</u>

Lean more here:

brainly.com/question/21279060

8 0

2 years ago

"Darwin's finches" reside on the Galapagos Islands. Each species has a different type of beak, however, they can all be traced b

Ivahew [28]

It would be adaptation because the finches live in different islands and each have different weather and resources

3 0

3 years ago

Read 2 more answers

Which type of energy is associated with electric currents?

zalisa [80]

B. Electrical energy

Among the choices given, the type of energy associated with electric currents is electrical energy. By its definition, electric current is the flow of charged particles through a conductor or a conduction medium, for example, a wire. Basically, it involves electricity. It is similar to water current but instead of water molecules, charged particles move down a conductor. These charged particles are mostly electrons which move freely and at random. When all the free electrons move in the same direction, a current is created.

8 0

3 years ago