PHYSICS HIGH SCHOOL

What is the power of a hair dryer if it uses 72,000 joules energy in 60.0 seconds

Answers

Answer 1
Answer: Power=Energy
72,000/60 = 1200 watts 
:)

Related Questions

A traveling wave has wavelength 0.50 m, speed 20 m/s. Find the wave frequency.
1. Can someone help me with this? :) Which object is made of frozen gas, ice, and dust that orbits in the outermost reaches of the solar system?1) planet2) moon3) Kuiper Belt object 4) meteor2. Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?1) A comet hit the sun and sent off fragments that became the planets.2) The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets.3) The planets formed at the center of a collapsing spinning cloud of gas and dust.4) The sun and planets formed from a collapsing spinning cloud of gas and dust.
Nuclear energy can be used to power _______.a. street lightsb. 4esc. homesd. all of the above
Dark matter may explain _____.A.unexpected orbital velocities of stars in galaxies B.the source of energy that fuels stars C.the expansion of the universe D.the origin of life E.what came before the big bang
Two skaters stand facing each other. One skater's mass is 60 kg, and the other'smass is 75 kg. The two skaters push off each other. After the push, the smallerskater has a velocity of 3.0 m/s. If no other forces are acting on the skaters, whatis the velocity of the larger skater?

Does It take 100 HP to lift a 1000 kg weight from ground to the 4th floor. True or False.

Answers

Answer:NOPE you need more

Explanation:

The power required to lift a weight depends on the force needed and the speed at which the weight is lifted. The force required to lift a weight is given by the equation F = m * g, where m is the mass of the object and g is the acceleration due to gravity (approximately 9.81 m/s² on Earth).

For example, if a 1000 kg weight is lifted 10 m in 10 seconds, the work done can be calculated as W = (1000 kg) * (9.81 m/s²) * (10 m) = 98100 J (Joules). The power required is work done per unit time P = (98100 J) / (10 s) = 9810 W (Watts), which is approximately 9.8 kW¹.

In terms of horsepower, since 1 horsepower is approximately equal to 746 Watts¹, the power required would be about 13.15 horsepower. So, it does not require 100 horsepower to lift a 1000 kg weight from the ground under these conditions. However, these calculations assume ideal conditions and do not take into account factors such as air resistance or mechanical inefficiencies. In real-world applications, more power might be needed.

When heating water, during what temperature range will the temperature cease to change for some time?A. 98°C–102°C
B. 32°C–43°C
C. 54°C–62°C
D. 84°C–88°C

Answers

When heating the water , the temperature will cease to change for some time at the point where it almost reach the boiling point (that will differ according to the elevation of your place) , which usually in the range of : A. 98 C - 102 C

When heating water, the temperature will cease during 98°C-102°C to change for some time

What group does paracetamol come under

Answers

Paracetamol is grouped within the 'painkillers' category. 

A bicycle is heading west. It goes 500m in 5 minutes. What is its velocity?

Answers

Speed = 500m/5min = 100 m/min. Direction = west. Velocity = 100 m/min west.
Velocity = distance\time

500/(5*60)

=500
------
300 m/s west.

I a liter jar contains 0.5 moles of gas at a pressure of 2 ATM what is the temperature of the gas

Answers

Answer:

The temperature of the gas is 48.75 Kelvin.

Explanation:

Using the ideal gas equation as shown

PV = nRT where;

P is the pressure of the gas in ATM

V is the volume of the gas

n is the number of moles

R is the ideal gas constant

T is the temperature in Kelvin

From the formula, T = (PV)/(nR)

Given the following parameters V = 1litre, n = 0.5moles. pressure = 2ATM

R = 0.08206 atm L/molK

On substituting to get the temperature we have:

T = (2*1)/(0.08206*0.5) \nT = (2)/(0.04103)\nT = 48.75Kelvin

An article in a magazine denies that Earth is warming and climate change is occurring. The writer reports that this season was the snowiest winter on record for the Northeast, with lower than average temperatures for the region. Because of the low temperatures, the writer concludes that climate change cannot possibly be occurring. What question should you ask the writer to clarify whether his stance on climate change is scientifically sound?(A) Did the snowstorms cause extensive damage?
(B) Was this the coldest month on record for this region?
(C) Were the snowfall totals of each storm larger or smaller than last year?
(D) Were long-term temperature changes investigated in addition to short-term change?

Answers

D.
This is likely to challenge the writer's stance because one piece of data cannot accurately depict a long-term trend.`

Answer:

D

Explanation:
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Which explains how the Coriolis effect causes air circulation? A. Air from the equator moves toward the poles faster than the ground below it, so friction causes the air to veer west. In contrast, air from the poles moves toward the equator slower than the ground below it, so friction causes it to veer to the east. B. Air from the equator moves toward the poles faster than the ground below it, so friction causes the air to veer east. In contrast, air from the poles moves toward the equator slower than the ground below it, so friction causes it to veer to the west. C. Air from the poles moves toward the equator faster than the ground below it, so friction causes the air to veer east. In contrast, air from the equator moves toward the poles slower than the ground below it, so friction causes it to veer to the west. D. Air from the equator moves toward the poles slower than the ground below it, so friction causes the air to veer east. In contrast, air from the poles moves toward the equator faster than the ground below it, so friction causes it to veer to the west.