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stealth61 [152]
3 years ago
11

2) A 45-kg person steps on a scale in an elevator. The scale reads 460 N. What is the elevator doing?

Physics
1 answer:
goldfiish [28.3K]3 years ago
4 0

Answer:

The elevator is stationary

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A cosmic-ray electron moves at perpendicular to earth’s magnetic field at an altitude where the field strength is. what is the r
Harlamova29_29 [7]

4.266 m is the radius of the circular path the electron follows.

Given

Speed of electron (v) = 7.5 × 10⁶ m/s

Earth's Magnetic Field (B) = 1 × 10⁻⁵ T

We already know that

Mass of electron (m) = 9.1 × 10⁻³¹ kg

Charge on electron (q) = 1.6 × 10⁻¹⁹ C

According to the formula

Radius of circular path(r) = mass on electron × speed/ Charge × Magnetic field

Radius of circular path(r) = m × v/q × B

Put the values into the formula

r = 9.1 × 10⁻³¹ × 7.5 × 10⁶/ 1.6 × 10⁻¹⁹ × 10⁻⁵

On solving, we get

r = 4.266 m

Hence, 4.266 m is the radius of the circular path the electron follows.

Learn more about magnetic field here brainly.com/question/26257705

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6 0
2 years ago
What do you mean by force?​
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It’s to push an object in it’s direction of where it’s leading to.
3 0
3 years ago
. In science, which of the following is NOT true about scientific theories a. They are generated by the testing of many hypothes
nydimaria [60]

Answer:

The correct option is  b) By the time they get to be theories, they cannot be disproven. It's not necessary that the theories are always right. They can be proven wrong.

Explanation:

5 0
4 years ago
A cylinder fitted with a piston exists in a high-pressure chamber (3 atm) with an initial volume of 1 L. If a sufficient quantit
Bess [88]

Answer:

C. 85%

Explanation:

A cylinder fitted with a piston exists in a high-pressure chamber (3 atm) with an initial volume of 1 L. If a sufficient quantity of a hydrocarbon material is combusted inside the cylinder to produce 1 kJ of energy, and if the volume of the chamber then increases to 1.5 L, what percent of the fuel's energy was lost to friction and heat?

A. 15%

B. 30%

C. 85%

D. 100%

work done by the system will be

W=PdV

p=pressure

dV=change in volume

3tam will be changed to N/m^2

3*1.01*10^5

W=3.03*10^5*(1.5-1)

convert 0.5L to m^3

5*10^-4

W=3.03*10^5*5*10^-4

W=152J

therefore

to find the percentage used

152/1000*100

15%

100%-15%

85% uf the fuel's energy was lost to friction and heat

6 0
3 years ago
10. If red and yellow paint are mixed together, which color of light will be reflected?
Y_Kistochka [10]

Answer:

The color you get for mixing red and yellow is orange.

Explanation:

Minecraft logic

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