If a system requires 150 J of input work and produces 123 J of output work, what's its efficiency? A. 82% B. 92% C. 72% D. 122%
Updated 267 days ago|12/27/2020 8:43:13 PM
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User: If a system requires 150 J of input work and produces 123 J of output work, what's its efficiency? A. 82% B. 92% C. 72% D. 122%

Weegy: If a system requires 150 J of input work and produces 123 J of output work 82% is its efficiency.

User: Calculate the percent error if the experimental value of the density of copper is 21.2 g/cm3 and the accepted value is 22.1 g/cm3. A. 4.19% B. 4.25% C. 4.07% D. 4.02%

Updated 267 days ago|12/27/2020 8:43:13 PM
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The percent error is approximately 4.07% if the experimental value of the density of copper is 21.2 g/cm3 and the accepted value is 22.1 g/cm3.

Solution: 22.1 g/cm³ - 21.2 g/cm³ which is equal to 0.9 g/cm³; (0.9 g/cm³ / 22.1 g/cm³) x 100% = 4.07%.
Added 267 days ago|12/27/2020 8:43:13 PM

A child care facility in a fitness center can operate without a license because A. the fitness center is a private business. B. the fitness staff is qualified for child care. C. the parent is present at the fitness center. D. exercise facilities for the children are available at the fitness center.
Question
Updated 6/11/2019 5:59:54 AM
A child care facility in a fitness center can operate without a license because the parent is present at the fitness center.
The primary goal of the National Association for the Education of Young Children is to A. license child care centers. B. develop a quality curriculum for day care centers. C. check the credentials of day care staff. D. improve the quality of life for young children and their families.
Weegy: The primary goal of the National Association for the Education of Young Children is to: improve the quality of life for young children and their families. User: Which of the following is not one of the specific criteria for renewing a CDA credential? A. Documented proof of working with children for at least 80 hours within the past year B. Documented proof of past employment at a child care facility C. Documented proof of a current Red Cross or other agency Pediatric First Aid Certificate D. Documented proof of current membership in a national or local early childhood professional organization (More)
Updated 7/4/2019 3:24:19 PM
Documented proof of past employment at a child care facility. - is not one of the specific criteria for renewing a CDA credential.
What, in most states, is the minimum required amount of formal education for a center director? A. A GED certificate B. A few college credits C. Two years of specific college course work D. High school diploma
Updated 12/27/2017 5:58:37 AM
In most states, the minimum required amount of formal education for a center director is High school diploma.

An official authorization or approval from a professional organization of society that indicates that a person has met certain performance standards is called A. accreditation. B. licensing. C. peer approval. D. validation.
Updated 12/27/2017 5:57:52 AM
An official authorization or approval from a professional organization of society that indicates that a person has met certain performance standards is called accreditation.

Which of the following is not found in the form of waves? A. Radiant energy B. Sound energy C. Geothermal energy D. Seismic energy
Weegy: Geothermal energy is not found in the form of waves. User: Which of the following is not purely potential energy? A. Chemical energy B. Thermal energy C. Nuclear energy D. Gravitational energy Weegy: Thermal energy is not purely potential energy. User: Four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200 N. Force 2 is pushing to the left at 500 N. Force 3 is pushing to the right at 100 N. Force 4 is pushing to the left at 50 N. What's the net force acting on this object? A. 0 N B. 850 N C. 250 N D. 650 N (More)
Updated 267 days ago|12/27/2020 8:49:21 PM
Four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200 N. Force 2 is pushing to the left at 500 N. Force 3 is pushing to the right at 100 N. Force 4 is pushing to the left at 50 N. The net force acting on this object is 250 N.

Solution: 200 + 100 = 300; 500 + 50 = 550; 550 - 300 = 250.
Added 267 days ago|12/27/2020 8:49:21 PM
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