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Cloud [144]
3 years ago
7

some people agree that wearing seat belts reduces the risk of injurt to people in the car. however they say that the risk to oth

er road users might be increased. Suggest why it would be difficult to test the suggestion scientifically
Physics
1 answer:
leva [86]3 years ago
4 0

Answer:

It would be hard to test scientifically since it's subjective and can only be proven true if you conducted some experimentations and observations.

You might be interested in
A 100-watt lightbulb radiates energy at a rate of 100 J/s. (The watt, a unit of power, or energy over time, is defined as 1 J/s.
fomenos

Answer:

N=2.18\cdot 10^{20}photons/s

Explanation:

The energy of a photon is: E=h\nu=h\frac{c}{\lambda} when h is the Planck constant.

h=6.63\cdot 10^{-34}Js    

c=3.8\cdot 10^{8}m/s

Then, we calculate the energy of a photon with a wavelength equal to 550 nm.

E= 4.58\cdot 10^{-19}J

To find the number of photons we can use this equation:

N=\frac{P}{E}=\frac{100}{4.58\cdot 10^{-19}}=2.18\cdot 10^{20} photons/s

Have a nice day!

7 0
3 years ago
The purpose of a motor is to:
WINSTONCH [101]

Answer:

a motor is used to covert electrical energy to mechanical energy

7 0
3 years ago
How long will it take a horse to go from rest to 19 km/hr if it is accelerating at 5<br> km/hr 2 ?
Nataliya [291]

Answer:

I attached a PFD with the answer to your question and roughly 50 others involving acceleration and how to calculate it. This PDF gives you the answers to all the question whilst showing you an in-depth explanation on how they got the answer. Hopefully that helps

Explanation:

May I have brainliest please? :)

Download pdf
6 0
3 years ago
An electron has a velocity of 1.50 km/s (in the positive x direction) and an acceleration of 2.00 ✕ 1012 m/s2 (in the positive z
olga nikolaevna [1]

Answer:

see explanation

Explanation:

Given that,

velocity of 1.50 km/s = 1.50 × 10³m/s

acceleration of 2.00 ✕ 1012 m/s2

electric field has a magnitude of strength of 18.0 N/C

\bar F= q[\bar E + \bar V \times \bar B]\\\\\bar F = [\bar E + \bar V \times ( B_x \hat i +B_y \hat j +B_z \hat z )]\\\\\\m \bar a = [\bar E + \bar V \times ( B_x \hat i +B_y \hat j +B_z \hat z )]

9.1 \times 10^-^3^1 \times 2\times 10^1^2 \hat k=-1.6\times10^-^1^9 \hat k [18\hat k+ 1.5\times 10^3 \hat i \times (B_x \hat i +B_y \hat j +B_z \hat k)]42.2 \times 10^-^1^9 \hat k = -2.4 \times 10^1^6B_y \hat k + 2.4 \times 10 ^1^6 \hat j B_z\\

B_x = undetermined

B_y = \frac{42.2 \times 10^-^1^9}{-2.4 \times 10^-^1^6} \\\\= - 0.0176 T

B_z = 0T

8 0
4 years ago
Kamal, Kamala, Krishna invert a sum of RS= 30,000 on a business in the ratio 2 : 3 : 5. Find the each of their investment.​
Crazy boy [7]

Here's the <em><u>solution</u></em>,

Let the <em><u>shares</u></em> be 2x, 3x and 5x according to their shared <em><u>investment</u></em> ratio,

now, we know :

=》2x + 3x + 5x = 30000

=》10x = 30000

=》x = 3000

So, value of x = 3000

hence, the <em><u>share</u></em> of each <em><u>shareholder</u></em> is :

  • kamal = 2x = 6000
  • kamala = 3x = 9000
  • Krishna = 5x = 15000

i hope it helped.....

3 0
3 years ago
Read 2 more answers
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