TABELA DO IMPOSTO DE RENDA EM 1999 PARA PESSOAS HIS Rendimento em novembro (R$) Alíquota (%)
Até 900
isento
Acima de 900 até 1800
15
Acima de 1800
27,5
Neste período, o salário mensal de Renata era de R$
500,00, então:
(A) Renata era isenta.
(B) Renata deve pagar R$ 375,00 de I. R.
(C) Renata deve pagar R$ 495,00 de I. R.
(P) d) Renata deve pagar R$ 687,50 de I. R.​

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

The strong nuclear force acts over a small distance than the electrostatic force. true or false