1,016 Answered Questions for the topic physical science

Physical Science

3d

#### How much does it cost to run a 1500-W hair dryer for 45 minutes each day for one month (30 days) at a cost of 7¢ per kWh? $

Physical Science

3d

#### A car radio draws 0.27 A of current in the auto's 12-V electrical system. (a) How much electric power does the radio use? W (b) What is the effective resistance of the radio? Ω

Physical Science

3d

#### If an electrical component with a resistance of 62 Ω is connected to a 115-V source, how much current flows through the component? A

Physical Science

3d

#### A current of 8.00 A flows in a conductor for 2.0 s. How much charge passes a given point in the conductor during this time? C

Physical Science

3d

#### How many electrons make up 1.50 coulomb of charge? (Hint: q = ne.) electrons

Physical Science

3d

#### Light is incident on a plane mirror at an angle of 46° relative to the normal. What is the angle of reflection? °

Physical Science

7d

#### A loud speaker has an input of 73 dB. If the volume of the sound is turned up so that the output intensity is 10000 times greater, what is the new sound intensity level? dB

Physical Science

7d

#### During a thunderstorm, 5.9 s elapses between observing a lightning flash and hearing the resulting thunder.

Approximately how far away in kilometers and miles was the lightning flash? (Assume the speed of sound is 344 m/s.) km mi

Physical Science

7d

#### Compute the wavelength in air of ultrasound with a frequency of 48 kHz if the speed of sound is 344 m/s. m

Physical Science

7d

#### What is the weight in newtons of a 202 g package of breakfast cereal? N

Physical Science

7d

#### A person running a fever has a temperature of 38.6°C. What is this temperature on the Fahrenheit scale? °F

Physical Science

8d

#### How much work is required to lift a 2.9-kg concrete block to a height of 2.0 m? J

Another QuestionA person running a fever has a temperature of 38.6°C. What is this temperature on the Fahrenheit scale? °F

Physical Science

8d

#### A constant net force of 1325 N gives a toy rocket an acceleration of 2.8 m/s2. What is the mass of the rocket? kg

Another question What is the weight in newtons of a 202 g package of breakfast cereal? N

Physical Science

9d

#### how much work must be done on a 1,000-kg car to increase its speed from 1 m/s to 2 m/s?

Physical Science

18d

#### A worker pushes horizontally on a large crate with a force of 120 N, and the crate is moved 3.2 m. How much work was done? J

Physical Science

18d

#### While rearranging a dorm room, a student does 334 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force? N

Physical Science

18d

#### What is the potential energy of a 3.15-kg object at the bottom of a well 11.8 m deep as measured from ground level? J Explain the sign of the answer.

Physical Science

18d

#### A student who weighs 571 N climbs a stairway (vertical height of 3.1 m) in 30 s. (a) How much work is done? J (b) What is the power output of the student? W

Physical Science

18d

#### A microwave oven has a power requirement of 1,245 W. A frozen dinner requires 4.8 min to heat on full power. (a) How much electrical energy (in kWh) is used? kWh

This is the second part of the question. (b) If the cost of electricity is 10¢ per kWh, how much does it cost to heat the dinner? (Do not round your final answer. Fractional cent values are...
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Physical Science

21d

#### What is the velocity of a quarter dropped from a tower after 10 seconds?

use the formula Vf - Vl divided by fShow your work

Physical Science

28d

#### What is the period of a wave that has a frequency of 300 Hz

Physical Science

29d

#### Does 40kg mass and 40N weight have the same mass?

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