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3 years ago

6

True or False: The Q value (the RBE) for alpha particles is higher than the Q value of neutrons and beta particles.?

1 answer:

tangare [24]3 years ago

5 0

False, because the rbe for alpha particle is not higher than the rbe value of neutrons and beta particle

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A conducting sphere of radius 5.0 cm carries a net charge of 7.5 µC. What is the surface charge density on the sphere?

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Answer:

I = 7.5*10^-10 kg m/s

Explanation:

In order to calculate the impulse you first take into account the following formula:

$I=m\Delta v=m(v-v_o)$ (1)

m: mass of the pollen grain = 1.0*10^-7g = 1.0*10^-10 kg

v: final speed of the pollen grain = ?

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Next, you calculate the final speed of the pollen grain by using the information about the acceleration and time. You use the following formula:

$v=v_o+a t$ (2)

a: acceleration = 2.5*10^4 m/s^2

t: time = 0.30ms = 0.30*10^-3 s

$v=0m/s+(2.5*10^4m/s^2)(0.30*10^{-3}s)=7.5\frac{m}{s}$

Next, you replcae this value of v in the equation (1) and calculate the impulse:

$I=m(v-v_o)=(1.0*10^{-10}kg)(7.5m/s-0m/s)=7.5*10^{-10}kg.\frac{m}{s}$

The impulse delivered to the pollen grain is 7.5*10^-10 kg m/s

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4 years ago