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3 years ago

30 points, brainiest, high school physics problem, please help.

Physics

2 answers:

Taya2010 [7]3 years ago

6 0

Answer:

I thinks its c

Explanation:

I hope this helps :)

Ronch [10]3 years ago

6 0

I’m pretty sure it’s C

good luck & i hoped this worked!

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Radiation with a wavelength of 238 nm shines on a metal surface and ejects electrons that have a maximum speedof 3.75 X 105 m/s.

Ulleksa [173]

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3 years ago

You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 12-m-hi

Vlada [557]

Answer:

Vmax=11.53 m/s

Explanation:

from conservation of energy

$E_A} =E_{B}$

Spring potential energy =potential energy due to elevation

0.5*k*x²= mg $(h_{B}-h_{A} )$ =mgh

0.5*k*2.3²= 430*9.81*6

k=9568.92 N/m

For safety reason

k"=1.13 *k= 1.13*9568.92

k"=10812.88 N/m

agsin from conservation of energy

$E_A} =E_{C}$

spring potential energy=change in kinetic energy

0.5*k"*x²=0.5*m* $V_{max}^{2}$

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5 0

4 years ago

Which is a characteristic of thermal energy transfer through convection

Lynna [10]

Answer: The thermal energy transfer is When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along.

Explanation: heat transfer is called convection. hopefully this was helpful.

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3 years ago

The drag on a pitched baseball can be surprisingly large. Suppose a 145 g baseball with a diameter of 7.4 cm has an initial spee

kupik [55]

Answer:

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Explanation:

Part a)

As we know that drag force is given as

$F = \frac{C_d \rho A v^2}{2}$