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Brut [27]
3 years ago
5

4. X-ray radiation from diffraction and fluorescence instruments is a) Not very dangerous because the X-rays are absorbed in the

air b) Very dangerous but poses little real hazard since instruments are designed to completely enclose all beams c) Very dangerous and users must not override devices designed to protect from exposures d) Dangerous only when at full power
Physics
1 answer:
Dahasolnce [82]3 years ago
7 0

Answer:

c) Very dangerous and users must not override devices designed to protect from exposures.

Explanation:

X-ray is a form of high energy electromagnetic radiation and are part of the electromagnetic spectrum.

X-ray radiation from diffraction and fluorescence instruments is very dangerous because of their high energy and wavelength.

Hence, users must not override devices designed to protect from exposures. The best shielding device to protect one from exposure is Lead.

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A new ride being built at an amusement park includes a vertical drop of 126.5 meters. Starting from rest, the ride vertically dr
Readme [11.4K]

Answer:

Speed at the bottom of the roller coaster = 49.79 m/s

Explanation:

A new ride being built at an amusement park includes a vertical drop of 126.5 meters. Starting from rest, the ride vertically drops that distance before the track curves forward.

We have to find the speed at the bottom.

Here the gravitational energy fully converts to kinetic energy, so we equate it.

Gravitational energy = m\times g\times h

Kinetic energy = 0.5 \times m\times v^{2}

m\times g\times h = 0.5 \times m\times v^{2}

9.8\times 126.5 = 0.5\times v^{2}

v^{2} = 2479.4

Velocity, v = 49.79 m/s

7 0
3 years ago
A jogger runs 5.0 km on a straight trail
meriva

Good for him !  If he's also adhering to a healthy diet, getting plenty of sleep, avoiding substance dependence, and minimizing his stress level, then he's doing everything he can to maximize his chances for a long, healthy, pleasant and rewarding fun life.  

5 0
3 years ago
What type of energy moves through wires
jarptica [38.1K]

Answer:

current electricity

Explanation:

have a nice day

8 0
3 years ago
BMX bicycle rider takes off from a ramp at a point 1.2 m above the ground. The ramp is angled at 40∘ from the horizontal, and th
podryga [215]

Answer:

The ramp lands at an horizontal distance of 3.989 m

Explanation:

Range: Range is defined as the horizontal distance of a projectile from the point of projection to the point where the projectile hits the projection plane again. It is measure in meters (m)

R = U²sin2∅/g..................................... Equation 1

Where R = The horizontal distance from the end of the ramp, U = rider's speed, ∅ = the ramp's angle to the horizontal.

<em>Given: U = 6.3 m/s, ∅ = 40°, g = 9.8 m/s²</em>

<em>Substituting these values into equation 1</em>

<em>R = [6.3²sin2(40)]/9.8</em>

<em>R = (39.69×sin80)/9.8</em>

<em>R = 39.69×0.985/9.8</em>

R = 3.989 m

Thus the ramp lands at an horizontal distance of 3.989 m

7 0
3 years ago
Read 2 more answers
What is the difference between the specific heat of a substance and the total amount of heat of that substance ?
Dominik [7]

Explanation:

Specific heat of a substance is defined as the amount of heat that is required to raise the temperature of one mole or mass of a substance by 1°C.

The total amount of heat of a substance is the amount of heat required to raise the temperature of the given mass of the substance by 1°C.

Specific heat is an intensive property and does not depend on the amount of matter that is present within a substance.

Total amount of heat is an extensive property of matter and it is predicated on the amount of matter present.

6 0
3 years ago
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