PHYSICS HIGH SCHOOL

A blender uses 1,500 joules of energy in 5 seconds. What is the power rating of the blender?

Answers

Answer 1

Answer: the answer is 300 watts

Answer 2

Answer:

Answer:

The power rating of the blender is 300 W.

Explanation:

To find the power of an object, you need to divided the work by the time. Thus, we would divide the work, 1,500, by the time, 5 seconds. This gives you the answer, 300 W.

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Which statement is true for a sound wave entering an era of a warmer air ?A. The wave travels faster and with the same wavelength
B. The wavelength travels at the same speed but with an increased wavelength
C. The wave travels at the same speed and with the same wave length
D. The wave travels slower and with an increased wavelength
E. The wave travels faster and with an increased wavelength

Answers

Answer:E
Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. Wavelength always increases with speed, as frequency is fixed at source and speed= freq x wavelength
The speed of sound in room temperature air is 346 meters per second.

To evaluate the observations you make, you must use ____. a. a hypothesis
c. measurements
b. critical thinking
d. models

Answers

Answer:

critical thinking

Explanation:

To evaluate the observations you make, you must use __critical thinking __.

Critical thinking is an way of thinking in which a person improves the quality of his thinking by skillfully analyzing, accessing and reconstructing it. It is self directed, self disciplined and self monitored and self corrective thinking. A well cultivated critical thinker raises vital questions, gathers and assesses relevant information, and thinks openmindedly.

It maybe both measurements and critical thinking

In the illustration, which two simple machines are being used to enable the student to reach the door? A)
inclined plane AND pulley

B)
lever AND wheel-and-axle

C)
pulley and lever

D)
wheel-and axle AND inclined plane