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A 100 g ball and a 220 g ball are connected by a 37-cm-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm. What is the angular momentum of the system?

Dustan asked Oct 16, 2024

by Dustan

7.9k points

1 answer

4 votes

112k views

A juggler tosses a ball into the air. The balls height, h, feet and time, t, seconds can be represented by the equation h(t)=-16t² +144. After 15 seconds what was the height of the ball?

KingFu asked Oct 16, 2024

by KingFu

7.5k points

1 answer

3 votes

74.4k views

A plane wave in air with an electric field amplitude of 9.3 V/m is incident normally upon the surface of a lossless, nonmagnetic medium with ϵr=25 . Determine the amplitude of the reflected E-field Er(V

Jaquan asked Oct 16, 2024

by Jaquan

8.0k points

1 answer

2 votes

89.1k views

a 1.70-kg disk with a rotational inertia given by mr2/2 is free to rotate on a fixed horizontal axis suspended from the ceiling. a string is wrapped around the disk and a 0.900-kg mass hangs from the free

Joshua Ohana asked Oct 16, 2024

by Joshua Ohana

8.1k points

1 answer

3 votes

156k views

They are then released from rest simultaneously and allowed to interact via the electric force. Which particle reaches the origin first? A) Proton B) Electron C) Neutron D) Positron

Gabor Dolla asked Oct 16, 2024

by Gabor Dolla

7.3k points

1 answer

5 votes

99.6k views

You have 18 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time,

Gleb Sabirzyanov asked Oct 16, 2024

by Gleb Sabirzyanov

8.7k points

1 answer

0 votes

107k views

A car in the northbound lane is sitting at a red light. At the moment the light turns green, the car accelerates from rest at 2.0 m/s2. At this moment there is also a car in the southbound lane that is

Adel Boutros asked Oct 16, 2024

by Adel Boutros

9.0k points

1 answer

3 votes

14.7k views

Using a first-class lever, an effort force (E) of 22 pounds is placed 7.5 feet from the fulcrum (ED) and used to lift a load of 105 pounds (R). What distance from the fulcrum (RD) was the resistance or

FriedSaucePots asked Oct 16, 2024

by FriedSaucePots

8.5k points

2 answers

4 votes

48.6k views

YOU AND YOUR BUDDY ARE ON A ANIGHT DIVE. A LARGE FISH SWIMS BY AND STARTLES YOUR BUDDY, CAUSING STRESS. YOUR BUDDY SHOULD....

Valerie asked Oct 16, 2024

by Valerie

7.4k points

1 answer

0 votes

80.4k views

What is the purpose of NASA star finder

Melvynkim asked Oct 16, 2024

by Melvynkim

8.4k points

1 answer

1 vote

69.8k views

A tree falls in a forest. How many years must pass before the 14C activity in 1.00 g of the tree’s carbon drops to 1.00 decay per hour? a) 20,000 years b) 30,000 years c) 40,000 years d) 50,000 years

Evaluna asked Oct 16, 2024

by Evaluna

8.0k points

1 answer

2 votes

106k views

Calculate the magnetic flux density of a charge at a distance of 10 cm in air from the north pole with a magnetic strength of 10000 A.M. a) 3183.1 T b) 10000 T c) 2828.4 T d) 1414.2 T

Manuchehr asked Oct 16, 2024

by Manuchehr

7.5k points

1 answer

2 votes

142k views

The _____ waves advance in a backward-rotating, elliptical motion. Option 1: S-wave Option 2: P-wave Option 3: Love Option 4: Rayleigh

WebFashion asked Oct 16, 2024

by WebFashion

8.6k points

1 answer

4 votes

129k views

What is the base unit for measuring time in the SI system? Question 1 options: meter kilogram second Kelvin mole

Markus Schnell asked Oct 16, 2024

by Markus Schnell

8.4k points

1 answer

1 vote

233k views

The quantity that measures inertia is?

Hazim Eid asked Oct 16, 2024

by Hazim Eid

8.0k points

1 answer

3 votes

182k views

A submarine travels at an elevation of -75 ft relative to sea level. Then its elevation changes by 16 ft. What is the new elevation of the submarine? A) -59 ft B) -91 ft C) -59 ft D) -59 ft

Gassa asked Oct 16, 2024

by Gassa

7.0k points

1 answer

5 votes

32.6k views

How many levels does an electron need to change to give off electromagnetic radiation with the greatest energy?

DookieMan asked Oct 16, 2024

by DookieMan

8.5k points

1 answer

2 votes

70.0k views

My friend and I started simultaneously towards each other from two places 100 m apart. After walking 30 m, my friend turns left and goes 10m, then he turns right and goes 20 m and then turns right again

Halfpint asked Oct 16, 2024

by Halfpint

8.4k points

1 answer

2 votes

97.6k views

The concept of time raises questions about whether it was invented or discovered. Time itself is not a physical entity but a concept used to order events. The measurement of time began with devices like

Purvik Dhorajiya asked Oct 16, 2024

by Purvik Dhorajiya

7.6k points

1 answer

4 votes

40.2k views

Indicate which of the following sources produces the lowest energy photons. a) Radio waves b) X-rays c) Infrared radiation d) Gamma rays

Deitsch asked Oct 16, 2024

by Deitsch

7.3k points

1 answer

1 vote

126k views

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