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4 years ago

One result of wave refraction is that _____.

Physics

1 answer:

hammer [34]4 years ago

8 0

One result of wave refraction is that <span>wave energy is concentrated on headlands projecting into the water.</span>

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An electron in a tv picture tube is accelerated through a potential difference of 10 kv before it hits the screen. What is the k

fomenos

Answer:

10,000 eV

Explanation:

Due to the law of conservation of energy, the kinetic energy of the electron at the end of its path is equal to its initial electric potential energy, given by:

$U=q\Delta V$

where

q is the electron charge

$\Delta V$ is the potential difference

Here we have:

$q=1 e$ is the electron's charged

$\Delta V=10 kV=10,000 V$ is the potential difference

Substituting into the formula, we have

$U=(1e)(10,000 V)=10,000 eV$

8 0

3 years ago

Zachary, a lab instructor, is writing a safety contract that his chemistry class will use for an experiment. He mentions that st

Cloud [144]

Students should be sure to put on their goggles during chemical test.

Students should be sure to wear their hand gloves during chemical test.

3 0

4 years ago

Read 2 more answers

Car A rear ends Car B, which has twice the mass of A, on an icy road at a speed low enough so that the collision is essentially

puteri [66]

Answer:

Vb = v/2

Half of the speed of Car A before the collision

Explanation:

This problem can be solved by using conservation of momentum.

$m_{A}*v_{A1} + m_{B}*v_{B1} = m_{A}*v_{A2} + m_{B}*v_{B2}$

Since car B was stopped before the collision and its mass is twice the mass of A:

$v_{B1} = 0\\m_{B} = 2*m_{A}$

Also, since it is an elastic collision, car A stops after hitting car B. Rewriting the equation:

$m_{A}*v_{A1} + 2m_{A}*0 = m_{A}*0 + 2m_{A}*v_{B2}\\m_{A}*v_{A1} = 2m_{A}*v_{B2}\\v_{B2}=\frac{v_{A1}}{2}$

Therefore, the speed of car B after the collision is half of the speed of car A before the collision (v)

Vb = v/2

8 0

4 years ago

Which of the following materials has the lowest resistance copper wood plastic

olga2289 [7]

Resistance in a material is essentially how much it resists an electric current. Metals conduct electricity and so therefore have low resistance. An insulator such as wood will have a very high resistance because electrons find it very difficult (if not impossible) to pass through it.

The order of resistance from lowest to highest is:
Copper
Plastic
Wood

8 0

3 years ago

The diagram below shows the velocity vectors for two cars that are moving

MariettaO [177]

Answer:

b. the answer

hope it helps

5 0

3 years ago