Answer:
Kat should get a whistle that emits sounds in the range of <u>23 and 54,000 Hz</u>.
Explanation:
The hearing range is the frequency range that can be heard by the animals, including humans.
Generally, the hearing range of humans is about 20 to 20,000 Hz and the hearing range of dogs is around 67 to 45,000 Hz
Dog whistles are the whistles which emits ultrasonic sound and are used for training dogs. <u>Generally, the dog whistles are within the range of 23 to 54,000 Hz and thus, can not be heard by the humans.</u>
Chemical: can burn
physical: hard
Answer:
b - declaration on independence
Explanation:
the other 3 don't exist
Answer:
the effect of framing,
Explanation:
The effect of framing refers to some types of bias that occurred when people tried to pick their options while already believing that only specific type of options would be beneficial.
In the example above, Pablo has several options to turn the screw.
But he already had a pre-existing belief that only screwdriver would be the options that only beneficial for him. So, he chose to ignore the potential use of coins even if it also could solve his problem.
He debated with Stephen Douglass, in what would eventually be called the "Lincoln-Douglass Debates"