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rodikova [14]
4 years ago
13

Jerome places a bag of flour on a scale. The scale shows that the bag has a weight of 17 N. Which is the reaction force of the b

ag sitting on the scale?
The scale exerts a 17 N force up on the bag.
The scale exerts a 17 N force down on the counter.
Earth exerts a 17 N force down on the bag.
The bag exerts a 17 N force down on the scale.
Physics
1 answer:
icang [17]4 years ago
3 0

Answer:

A

Explanation:

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1) A parked car starts to move with a constant velocity of 3 m/s, after moving
makkiz [27]

Answer:

velocity (v) =distance(s) ÷ time (t)

Explanation:

v=s÷t

s=v×t

s=3×3.4

s= 10.2m

7 0
3 years ago
In a Young’s interference experiment, the two slits are separated by 0.150 mm and the incident light includes two wavelengths: l
dezoksy [38]

Answer:

2.52 × 10⁻² cm

Explanation:

The distance of bright fringe from the center of the screen is given by the formula

                y = \frac{m\lambda D}{d}

Here, wavelength is λ, Distance of the screen from the slits is D, seperation between the

slits is d.

   

Separation between the slits, d = 0.15 mm

                                                     = 0.15 * 10^{-3} m

Distance of the screen from the slits = 1.40 m

We have a wavelength, λ1 = 540 nm

                                           = 540 * 10^{-9} m

By substituting all these values in the above equation we get

                y1 = mλD/d

                y1 = m(540 \times 10^{-9} m)(1.40 m)/(0.15 \times 10^{-3} m)

                y1 = m(5.04 * 10^{-3} m)

We have a wavelength, λ2 = 450 nm

                                           = 450 * 10^-9 m

By substituting all these values in the above equation we get

                y_2 = \frac{m\lambda D}{d}

                y_2 = m(450 * 10^{-9} m)(1.40 m)/(0.15 * 10^{-3} m)

                y_2 = m'(4.20 * 10^{-3} m)

According to the problem, these two distance are coincides with each other.

So,

                           y_1 = y_2

m(5.04 * 10^{-3} m) = m'(4.20 * 10^{-3} m)

by testing values, the above equation is satisfied only when, m = 5 and m' = 6

Then from the above we have

                           y1 = y2 = 0.0252 m

                                         = 2.52 × 10⁻² cm

8 0
3 years ago
IF YOUR GOOD AT SCIENCE THEN PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST
MakcuM [25]

Answer:

A: Copper is a good conductor

Explanation:

For an electrical current to flow through something, the main power source has to fight against the resistivity. Copper wire has a very low level of resistivity making it an excellent conductor. Basically, copper is super bendy and flexible, electricity.

Fun fact, sinc humans are also super bendy and essentially big sacs of all things wet and watery, we're considered to also be excellent conductors. We also have very intricate circuitry and a lot of natural electricity so basically, we were made for it, especially since the body already used little bits of electricity to function.

3 0
3 years ago
A train moves moves from rest to a speed of 25 m/s in 30.0 sec . what is its acceleration
spayn [35]
A = Delta v/Delta t
Delta v = 25 - 0 = 25
Delta t = 30
25/30 = 5/6 = 1.66 repeating
7 0
3 years ago
Read 2 more answers
Which term below best describes the forces on an object with a a net force of zero?
dybincka [34]

Answer:

B. Balanced Forces

Explanation:

The net force is defined as the sum of all the forces acting on an object. Therefore, if the forces are balanced, they will counteract each other, causing the net force to be zero, then the object will continue at rest or moving with constant velocity.

4 0
4 years ago
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