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The Earth has a radius of 6.38 × 10^6 m and is 1.49 × 10^11 meters from the Sun. If the intensity of solar electromagnetic radiation at the top of the Earth's atmosphere is 1330 W/m^2, what is the total radiated power output of the Sun?
An athlete training for an event does 6.53 104 J of work during a workout and gives off 6.17 105 J of heat, Determine the magnitude of the change in internal energy of the athlete
A 6.0 kg mess kit sliding on a frictionless surface explodes into two 3 kg parts, one moving at 1.5 m/s, What was the original speed of the mess kit
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
q1. a 653 kg lift starts from rest. it moves upward for 2.8 s with constant acceleration until it reaches a cruising
A ship's mast reaches to a height of 15 meters above the surface of a 10-meter-deep lake. When the sun is 30° above the horizon, how long will the shadow of the mast be on the bottom of the lake?
The area of a typical eardrum is about 5.0x10?5 m2. What is the sound power (energy per second) incident on the eardrum at the threshold of hearing
Calculate the absolute pressure at an ocean depth of 750 m. Assume the density of sea water is 1020 kg/m3 and that the air above exerts a pressure of 101.3 kPa.
q1. black holes are suspected while a visible star is being noticeably pulled by an invisible partner that is more
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
Use Newton law to determine the force applied to the backrest when a 150-lb person leans 40% of his or her body weight against it. Determine the constant requiered for the spring
A 115 V fish-tank heater is rated at 120 W, Calculate the current through the heater when it is operating
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. But she does have devices to measure distance and time accurately. What is the mass of this canister
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