Yes, it would be a valid test.
To ensure that the results are valid. That's the whole point of a science test. The test must be able to be repeated and have the same result to start being considered valid.
No, usually the tests would be done a few days after sexual intercourse, otherwise you will get false negatives if you tested too soon.
No
No, it is not.
Ask doctors, personal physician.
You use your mouth, lips, and tongue to stimulate a man's penis, as would normally occur during intercourse. This can be done all the way to achieving his orgasm, or it can be done before or during intercourse.
When negative work is done on the object, the object's energy decreases. This MAY be kinetic energy, but some other form of energy may increase instead, for example, potential energy or heat energy.
A negative confession is a statement of what you "have not done".
The absolute value (that is the numerical value ignoring the sign) of the result is the operation done on the absolute value of the operands. If the signs of the operands are the same the result will be positive; otherwise the signs of the operands are different and the result will be negative. eg -2 × 5: the operands are of opposite signs (one positive, one negative), so the result will be negative and 2 × 5 = 10, thus -2 × 5 = -10; eg -2 × -5: the operands are of the same sign (both negative), so the result will be positive, and 2 × 5 = 10, thus -2 × -5 = 10; eg 10 ÷ -5; the operands are of opposite signs, so the result will be negative and 10 ÷ 5 = 2, thus 10 ÷ -5 = -2.
Performing ghusl after Fajr prayer is valid if done quickly, as long as all necessary steps are completed.
Yes. If force is negative, then work will be negative.
I think NO. You have to wait untill you miss period. I did test on 26th day but result was negative.