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If an electroscope is charged by inductionA) it will acquire a negative charge.B) it will acquire a positive charge.C) its leaves will remain attached.D) its leaves will separate because of the interaction of the charges.E) nothing will happen since electroscopes require being charged by conduction.
A cargo plane is flying horizontally at an altitude of 20.0 km with a speed of 888 km/h when a large crate falls out of the rear loading ramp. How long does it take the crate to hit the ground
A projectile is fired at an angle such that the vertical component of its velocity and the horizontal component of its velocity are both equal to 19 m/s. How long does it take for the ball to reach its high point
A mass of 1.2 kg is attached to a single spring and set into oscillation. The period of the spring oscillation is measured to be 4.80 seconds. What is the phase constant for the oscillation
Starting with a pure Sr-90 sample at time t=0, a researcher finds that the Y-90 activity is 22.9 mCi at t = 1 day. What was the activity at t = 0
The exhaust temperature of a Carnot heat engine is 250°C, What is the intake temperature if the efficiency of the engine is 27.0%
The second orbit for the only electron in a He+ ion has a radius of 5.29 X 10^-11 m. What is the speed of an electron in that orbit
A mass at the end of a spring is at distance x = +2.18 cm from the equilibrium position moving with velocity v = - 20.2 cm/s. Find the amplitude of the motion in cm
A 10 \rm g bullet traveling at 440m/s strikes a 12kg , 1.2-\rm m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, What is the angular velocity of the door just after impact
If the radius of the Earth is 6380km and its mass is 5.98X10^24 , determine the actual average density of the Earth
A spider's web can undergo SHM when a fly lands on it and displaces the web. For simplicity, what is the frequency of oscillation when the fly lands
Find the magnitude of book's velocity, just before the book reaches the floor. Find the direction of book's velocity
A electron is accelerated from rest by the potential difference of 350 V. It then enters a uniform magnetic field of magnitude 200 mT with its velocity perpendicular to the field.
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