Calculate the quantity of heat required to melt 4kg of ice and to raise the temperature of the water formed at 50°C if the Specific Latent Heat of Fusion of ice is 3.4×10^5J/Kg and Specific heat capacity of water is 4.2×10^3J/Kg/K
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What is the length x of the side of the triangle below? (hint: use the cosine function)

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)