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Q1. Black Holes are suspected while a visible star is being noticeably pulled by an invisible partner that is more than4 times as massive as the Sun. A red giant star is accelerated in a linear direction by gravity at 0.077 m/s2 towards an object that is 9.4 x1010 m away.
a) What is the mass of the invisible star? Reply using scientific notation (eg. 1e+10). Kg
b) by what factor is the star more massive than our Sun? React in decimal.
Q2. Hair dryer draws a current of 9.2a. How long does it take 1.9*10^3 C of charge pass through? How many electrons does this represent?
question1the ozone concentration in an atmosphere is measured in dobson units. we say that the amount of ozone is 1 du
The fuel gage for a gasoline tank in the car reads proportional to the bottom gage pressure .if the tank is 30cm deep and accidentally contains 2 com of water plus gasoline how many centimetres of air remain at the top when gage erroneously reads ..
q1. a 1250 n uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. a w
Laser light of wavelength 509nm illuminates two identical slits, producing an interference pattern on a screen 86.5cm from the slits, Calculate the width of the slits
A 12 kg runaway grocery cart runs into a spring with spring constant 300 N/m and compresses it by 70 cm.What was the speed of the cart just before it hit spring.
The coefficient of static friction
A uniform horizontal beam 5.00 m long and weighing 320 N is attached to a wall by a pin connection tht allows the beam to rotate. How far out on the beam can the person stand without breaking the cable
A 40 kg child slides down a playground slide at a constant speed. The slide has a height of 3.6 m and is 7.6 m long. find the magnitude of the kinetic friction force acting on the child
The electric field of an electromagnetic wave in a vacuum isEy = (17.0 V/m)cos((6.28 ×108)x??t), where x is in m and t is in s. What is the wave's magnetic field amplitude
A baseball batter sets up in the batting box and holds his bat still over the plate for a moment. How large is the torque exerted by the batter's hand on the bat
An electron moves in a circular path perpendicular to the constant magnetic field with a magnitude of 2.00 mT. The angular momentum of the electron about the center of the circle is 5.50 multiplied by 10-25 J•s.
question1an isolated large-plate capacitor not linked to anything originally has a potential difference of 1110 volts
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