It takes 4 hr 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. What is the half-life of radium-230? A) 1 hr 4 min B) 1 hr 17 min C) 1 hr 33 min D) 1 hr 49 min Eli

An object which has a mass of 70 kg is sitting on a cliff 10 m high. Calculate the object's Potential energy. Given g = 10m/s2 Question 16 options: a) 7,000 Joules b) 3,500 Joules c) 70 Joules d) 35 Joules e) 700 Joules

A 34 kg block slides with an initial speed of 9 m/s up a rampinclined at an angle of 10o with the horizontal. Thecoefficient of kinetic friction between the block and the ramp is0.6.

If a person moves an object weighting 6 Newton's over a distance of 20 meters in 60 seconds. The number 6 and 20 is described what in the formula of power. A. work done B. time interval C. Power D. None of the above

Find the magnitude f of the force that the wooden block exerts on the nail, assuming that this force is independent of the depth of penetration of the nail into the wood.

A car is traveling south at a speed of 62 miles per hour and then begins traveling at a speed of 63 miles per hour but continues traveling in the same direction. Which of the following has changed? A. volume B. mass C. density D. velocity

How much power does a hair dryer require to transform 198000

An electric oven has a resistance of 201 ohms and a voltage of 220 V. How much current does it draw? a) 11 A b) 1.1 A c) 1,100 A d) 110 A

How are magnetic fields and electric fields similar

What was done to test if Comets are responsible for 1/2 the Earth's water?

Select the correct answer. Which healthy snack can provide protein after physical activity? A. an orange slice B. pretzels C. yogurt D. a sports drink