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3 years ago

Which is more dangerous to living things, gamma rays or X-rays? Explain.

Physics

1 answer:

KiRa [710]3 years ago

7 0

Answer and Explanation:

Both gamma rays and X- rays are dangerous to living things but when there is comparison between gamma and X- rays gamma rays are more dangerous to living things because it has more energy as its frequency is high as compared to X-rays because X-rays have longer wavelength than gamma rays so the gamma rays are more dangerous than x rays to living things

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What would the average speed in kph of a horse and rider be if they cover a total distance of 14 km in 249 minutes

romanna [79]

Average speed = (distance covered) / (time to cover the distance)

Average speed = (14 km) / (249 min)

Average speed = (14/249) (km/min)

Average speed = (14/249) (km/min) x (60 min/hr)

Average speed = (14 x 60 / 249) km/hr

Average speed = 3.37 km/hr

8 0

4 years ago

Suppose you toss a tennis ball upward.a) Does the kinetic energy of the ball increase or decrease as it moves higher?b) What hap

Lilit [14]

Answer:

a) No. The kinetic energy of the ball decreases.

b) The potential energy of the ball increases.

c) The ball would go half of the original distance.

Explanation:

a) The kinetic energy would be converted to potential energy as the ball goes higher. Since the total mechanical energy is conserved, the kinetic energy would decrease.

b) The potential energy of the ball would increase. Since the total mechanical energy of the ball is conserved, the ball would lose speed, and therefore kinetic energy. In order to compensate the loss of kinetic energy, the ball would gain potential energy as it goes higher.

c) The relation of the energy and mass is as follows:

$K = \frac{1}{2}mv^2\\U = mgh$

According to the energy conservation

$K_1 + U_1 = K_2 + U_2\\\frac{1}{2}mv^2 + 0 = 0 + mgh\\\frac{1}{2}v^2 = gh$

The maximum height that the ball reaches is proportional to the initial velocity. If the ball would be imparted with the same amount of energy, its final potential energy would be the same. However, in order to have the same potential energy (mgh), its height would be half of the original case.

$mgh = (2m)g(\frac{h}{2})$

7 0

3 years ago

Hola ( Hey ) who wanna be friends?

il63 [147K]

Answer:

I do

Explanation:

I want to be friend

8 0

3 years ago

Read 2 more answers

A very long insulating cylinder of charge of radius 2.50 cm carries a uniform linear density of 15.0 nC/m. (

Pavlova-9 [17]

Answer:

r2 = 2.401557 cm

distance = 0.10 cm

Explanation:

given data

radius = 2.50 cm

density = 15.0 nC/m

voltmeter read = 175

solution

we know here potential difference that is express as

ΔV = $\frac{\lambda }{2\pi \epsilon _o} ln\frac{r2}{r1}$ ...........1

so here

$ln\frac{r2}{r1} = 2\pi \epsilon _o \times \frac{\triangle V}{\lambda }$

as here $\lambda$ is linear charge density

$\frac{r2}{r1} = e^{2\pi \epsilon _o \times \frac{\triangle V}{\lambda }}$

r2 = r1 × $e^{2\pi \epsilon _o \times \frac{\triangle V}{\lambda }}$

r2 = 2.40 × $e^{2\pi 8.85\times 10^{-12} \times \frac{175}{15\times 10^{-6} }}$

r2 = 2.401557 cm

and

here distance above surface will be

distance = r1 - r2

distance = 2.50 - 2.40

distance = 0.10 cm

4 0

3 years ago

Inertia is based only on an objects A. Mass B. Net force C. Velocity D. Weight

coldgirl [10]

Answer:

A. Mass

Explanation:

Inertia is the resistance of an object to any change in its velocity. Inertia depends only on the mass of the object: the greater the mass, the larger the inertia of the object, because it will be more difficult to change the velocity of the object.

An example to better understand: assume there is a golf ball rolling with a certain speed, and a car moving with the same speed. If we want to stop the two objects, we will need a much larger force for the car, because its mass is much greater than the gold ball, so it has much more inertia than the golf ball.

6 0

4 years ago

Read 2 more answers