The phrase "is palpable" is grammatically correct and can be used in written English.
It means something is noticeable, easily perceived or able to be touched. Example: The tension in the room was palpable as the two rival teams prepared to face off in the championship game.
Dictionary
is palpable.
adjective
Capable of being touched, felt or handled; touchable, tangible.
Exact(52)
The shock is palpable.
His scorn is palpable.
It is palpable.
Artie's debasement is palpable.
Anxiety is palpable.
His pride is palpable.
Similar(8)
His excitement was palpable.
Their bewilderment was palpable.
My exhaustion was palpable.
Their frustration was palpable.
His regret was palpable.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com