Whats the answer to this question

Answers

Answer 1

Answer:

It is the first option because Rutherford had put forward the first option and Neils Bohr changed the model of an atom

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a rectangular coil of 25 loops is suspended in a field of 0.20wb/m2.the plane of coil is parallel to the direction of the field the dimensions of the coil are 15cm perpendicular to the field line and 12cm parallel to them what is the current in the coil if there is a torque of 5.4N.M acting on it

Answers

Answer:

The current in the coil is 60 Ampere.

Explanation:

Given:

Number of turns in the coil is N = 25

Dimension of the coil = 15cm X 12cm

magnitude of magnetic field = 0.20T

angle in the xy plane is θ = 0 degree

torque τ = 5.4 N-m

To find:

current in the coil is i = ?

Solution:

The torque acting on the coil is given by

=> $\tau = NiAB cos\theta$

Converting cm to m

12 cm = 0.12 m

15 cm = 0.15 m

The area of the coil is

A = 0.12 X 0.15

A = $0.018 m^2$

Substituting the values

=> $5.4 = 25* i * 0.018 * 0.20 * cos\theta$

=> $5.4 = 25* i * 0.018 * 0.20 * cos(0)$

=> $5.4 = 25* i * 0.018 * 0.20 * 1$

=> $5.4 = 0.09* i$

=> $i = (5.4)/(0.09)$

=> i = 60 A

Help on Making an Egg capsule that survives a about 100 feet launch from catapult. You can only use one plastic bag, one Styrofoam cup, one ziplock bag, 7 popsicle sticks, 7 cotton balls, 9 packing peanuts, 9 straws, 9 yards of string, 1 yard of string, 1 egg and 1 yard of tape. And no, you can't hard boil the egg. Any ideas or pictures?

Answers

Well, surround the inner walls of the styrofoam cup with the popsicle sticks, stuff 4 cotton balls at the bottom of the cup for protection and cushioning, put the egg inside, stuff the remaining three cotton balls on the top of the egg, (you should be closing the cup with the cotton balls; like a cotton ball lid), THEN make a sealed lid with the tape over the top of the cotton balls to make a tape lid for thee cup, AFTER that, put as much peanuts as you can at the bottom of the cup and around the bottom rim of it, THEN make a little raft from the straws, (EXACTLY like how it's shown in the picture below), and hot glue or tape that to the peanuts, then put that cup into the ziplock bag.
Ask if you could use a tiny square of fabric, (so you could make a parachute and tie string to the fabric at the borders/corners of the bag), but if you can't....
Then instead wrap the bag with string, and be sure that there is a THICK layer covering the ENTIRE bag. ;-)
I hope I helped! =D

i would but the cotton balls, packing peanuts and egg in the cup. then i would make a small box out of the popsicle sticks around the cup, by warping the sticks with your string. the tape it shut with the cup in the box

Label the samples based on their pH levels

Answers

Final answer:

In Chemistry, pH levels can be determined using acid-base indicators or pH paper which change color to reflect the acidity or alkalinity of a solution. Substances with pH less than 7 are acidic, while those with pH over 7 are basic. The concentration of hydrogen ions can also be used to determine pH.

Explanation:

The pH level of a substance can be determined using acid-base indicators or pH paper which change color in relation to the acidity or alkalinity of the solution. The pH scale measures from 0 to 14, with 7 being neutral. Anything below 7 is considered acidic, and anything above 7 is basic or alkaline. For example, if using pH paper or an indicator, a solution that colors the paper or indicator red or orange is likely to be acidic, whereas a green or blue color suggests a basic solution. The specific color can provide a rough estimate of the pH value, with some indicators or pH papers providing more precise value ranges.

Another method to measure pH is by examining the concentration of hydrogen ions in the solution. A lower pH value indicates a higher concentration of hydrogen ions, making the solution more acidic. Conversely, a higher pH value indicates a lower concentration of hydrogen ions, making the solution more basic or alkaline.

Learn more about pH levels here:

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lemon juice, gastric juice and tomato juice are acidic, bleach and baking soda are alkaline and salt solution is neutral

Based on the data given, in what direction will the car accelerate? A.
upward

B.
toward the right

C.
toward the left

D.
downward

Answers

Vertical forces:
There is a force of 579N acting upward, and a force of 579N
acting downward.
The vertical forces are balanced ... they add up to zero ...
so there's no vertical acceleration.
Not up, not down.

Horizontal forces:
There is a force of 487N acting to the left, and a force of 632N
acting to the right.
The net horizontal force is

(487-left + 632-right) - (632-right - 487-right) = 145N to the right.

The net force on the car is all to the right.
The car accelerates to the right.

a truck is moving around a circular curve @ a uniform velocity of 13m/s. if the centifrical force on truck is 3,300N with truck mass of 1600kg. What is curve radius?