Recent activity by Zichen Wang

Recent activity by Zichen Wang

A photon with energy ℏω=250 keV is scattered at an angle θ=120∘ by a stationary free electron. Find the energy of the scattered photon. a) 125125 keV b) 150150 keV c) 200200 keV d) 225225 keV

asked Dec 26, 2024

1 answer 220k views

Factorise: A) x^2 + 11x - 26 B) x^2 -5x -24 C) 9x^2 + 6x - 8

asked Dec 21, 2024

2 answers 58.0k views

Multiple pathy alopecic areas on scalp of 8yo kid + hair shafts are broken off near scalp surface, black dots +/- diffuse scaling similar to dandruff +/- posauricular, posterior cervical or occipital nodes

asked Dec 12, 2024

1 answer 26.7k views

DISA builds, the default username and password is... a) admin/admin b) user/password c) root/toor d) guest/guest

answered Dec 7, 2024

1 answer 90.5k views

What is the area of the triangle 9yd 12yd 10yd

answered Sep 27, 2024

1 answer 38.5k views

As shown in the picture above, an ice skater is skating at a constant speed in a circle. Is she accelerating? Explain your answer and draw the direction of the velocity in point A, B, C, and D.

answered Aug 31, 2024

1 answer 209k views

Material requirements planning (MRP) is used to?

answered Aug 20, 2024

1 answer 134k views

The wholesale price for a chair is $194. A certain furniture store marks up the wholesale price by 31%. a. Determine the retail price after the markup. b. If the chair is later discounted by 15%, calculate

asked Aug 19, 2024

1 answer 12.6k views

What trade route did the Tang dynasty prioritize protecting? the Silk Road the Spice Route the Trans-Saharan Trade Route

answered Jul 2, 2024

1 answer 103k views

In which of the following cities did Martin Luther King, Jr. organize demonstrations, knowing it would probably cause violence but hoping it would show Southern brutality to the world?

asked Mar 28, 2024

1 answer 3.4k views

Diurnal slope flows are ultimately caused by? 1) Temperature differences between the valley and the surrounding areas 2) Pressure differences between the valley and the surrounding areas 3) Humidity differences

answered Mar 17, 2024

1 answer 11.2k views

Emergency kits - who determines content of kits?

asked Mar 4, 2024

1 answer 22.7k views

Use the order of operations to find the value of the expression. 42 − (8+3) + 2 = 42 − ___ + 2 = ___ − ___ + 2 = ___ + 2 = ___ Question content area bottom Part 1 Evaluate. 42 − (8+3) + 2 = 42 − enter

asked Mar 1, 2024

1 answer 205k views

For this assignment, you will watch two short videos from NBC News Learn, "Nativism" and "Immigration and the Rise of Nativism," about the influence of nativism in the 19th century. Using what you've learned,

answered Jan 21, 2024

1 answer 4.0k views

What the median of 11, 31, 17, 22, 18, 25, 25, 10, 15, 12, 30, 12, 29, 25, 21, 32, 30, 25

asked Jan 6, 2024

1 answer 64.9k views

What is another name for croup? 1) Laryngotracheobronchitis 2) Steeple sign 3) BroncHIOlitis 4) Pneumonia

answered Jan 6, 2024

1 answer 203k views

How did John Marshall’s time as Chief Justice of the Supreme Court impact the judicial branch of the United States government

asked Dec 16, 2023

1 answer 2.0k views

What is the ability to respond quickly to what you see, hear, or feel? A. Speed B. Reaction Time C. Coordination D. Position Control

asked Dec 7, 2023

1 answer 102k views

What is the area of figure

asked Oct 15, 2023

1 answer 155k views

The acid dissociation constant, Ka of HNO3 is 4.0 x 10^-4 What does the Ka value indicate about this compound?

answered Oct 11, 2023

1 answer 166k views

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