If an object's velocity equals or exceeds the escape velocity, it will follow a closed parabolic or hyperbolic orbit

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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We have obtained spectra of two hydrogen gas clouds and are studying an emission line that has a laboratory wavelength of 656.3 nm. This emission line appears in Cloud A's spectrum with a wavelength of 660.1 nm and in Cloud B's spectrum at 670.2 nm. What can we conclude about these clouds?

A) They are both moving toward us, and Cloud A is moving faster than Cloud B. B) They are both moving away from us, and Cloud A is moving faster than Cloud B. C) They are both moving away from us, and Cloud B is moving faster than Cloud A. D) They are both moving toward us, and Cloud B is moving faster than Cloud A.

Physics & Space Science

A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?

A) $116.80 B) $1168.00 C) $14.60 D) $16.80 E) $146.00

Physics & Space Science

A 5-turn square loop (10 cm along a side, resistance = 4.0 ?) is placed in a magnetic field that makes an angle of 30° with the plane of the loop. The magnitude of this field varies with time according to B = 0.50t2, where t is measured in s and B in T. What is the induced current in the coil at t = 4.0 s?

a. 25 mA b. 5.0 mA c. 13 mA d. 43 mA e. 50 mA

Physics & Space Science

For a particular process involving seven variables or parameters having four fundamental dimensions, how many dimensionless numbers can be formed?

What will be an ideal response?

Physics & Space Science