Mọi người giúp mình với 1/Chọn phát biểu đúng về chuyển động thẳng chậm dần đều
A. vận tốc và gia tốc luôn cùng phương và ngược chiều nhau
B. gia tốc luôn âm và có độ lớn ko đổi
C.đồ thị tọa độ theo thời gian là một đường thẳng đi xuống
D.đồ thị vận tốc theo thời gian là một parabol quay xuống

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.

Which change would make the diagram correct?